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68cbb7e3 | 1 | /* Definitions of target machine for GNU compiler, for MMIX. |
711789cc | 2 | Copyright (C) 2000-2013 Free Software Foundation, Inc. |
68cbb7e3 | 3 | Contributed by Hans-Peter Nilsson (hp@bitrange.com) |
4 | ||
581084df | 5 | This file is part of GCC. |
68cbb7e3 | 6 | |
581084df | 7 | GCC is free software; you can redistribute it and/or modify |
68cbb7e3 | 8 | it under the terms of the GNU General Public License as published by |
038d1e19 | 9 | the Free Software Foundation; either version 3, or (at your option) |
68cbb7e3 | 10 | any later version. |
11 | ||
581084df | 12 | GCC is distributed in the hope that it will be useful, |
68cbb7e3 | 13 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
16 | ||
17 | You should have received a copy of the GNU General Public License | |
038d1e19 | 18 | along with GCC; see the file COPYING3. If not see |
19 | <http://www.gnu.org/licenses/>. */ | |
68cbb7e3 | 20 | |
21 | #include "config.h" | |
22 | #include "system.h" | |
805e22b2 | 23 | #include "coretypes.h" |
24 | #include "tm.h" | |
68cbb7e3 | 25 | #include "rtl.h" |
26 | #include "regs.h" | |
27 | #include "hard-reg-set.h" | |
28 | #include "hashtab.h" | |
29 | #include "insn-config.h" | |
30 | #include "output.h" | |
1998fe39 | 31 | #include "basic-block.h" |
68cbb7e3 | 32 | #include "flags.h" |
33 | #include "tree.h" | |
34 | #include "function.h" | |
35 | #include "expr.h" | |
0b205f4c | 36 | #include "diagnostic-core.h" |
68cbb7e3 | 37 | #include "recog.h" |
38 | #include "ggc.h" | |
bde36f4a | 39 | #include "dwarf2.h" |
68cbb7e3 | 40 | #include "debug.h" |
41 | #include "tm_p.h" | |
68cbb7e3 | 42 | #include "target.h" |
43 | #include "target-def.h" | |
c0dae7df | 44 | #include "df.h" |
f105c84e | 45 | #include "tm-constrs.h" |
68cbb7e3 | 46 | |
47 | /* First some local helper definitions. */ | |
48 | #define MMIX_FIRST_GLOBAL_REGNUM 32 | |
49 | ||
50 | /* We'd need a current_function_has_landing_pad. It's marked as such when | |
51 | a nonlocal_goto_receiver is expanded. Not just a C++ thing, but | |
52 | mostly. */ | |
53 | #define MMIX_CFUN_HAS_LANDING_PAD (cfun->machine->has_landing_pad != 0) | |
54 | ||
55 | /* We have no means to tell DWARF 2 about the register stack, so we need | |
56 | to store the return address on the stack if an exception can get into | |
d3310704 | 57 | this function. FIXME: Narrow condition. Before any whole-function |
3072d30e | 58 | analysis, df_regs_ever_live_p () isn't initialized. We know it's up-to-date |
d3310704 | 59 | after reload_completed; it may contain incorrect information some time |
60 | before that. Within a RTL sequence (after a call to start_sequence, | |
61 | such as in RTL expanders), leaf_function_p doesn't see all insns | |
62 | (perhaps any insn). But regs_ever_live is up-to-date when | |
63 | leaf_function_p () isn't, so we "or" them together to get accurate | |
64 | information. FIXME: Some tweak to leaf_function_p might be | |
f024691d | 65 | preferable. */ |
d3310704 | 66 | #define MMIX_CFUN_NEEDS_SAVED_EH_RETURN_ADDRESS \ |
67 | (flag_exceptions \ | |
3072d30e | 68 | && ((reload_completed && df_regs_ever_live_p (MMIX_rJ_REGNUM)) \ |
d3310704 | 69 | || !leaf_function_p ())) |
68cbb7e3 | 70 | |
71 | #define IS_MMIX_EH_RETURN_DATA_REG(REGNO) \ | |
18d50ae6 | 72 | (crtl->calls_eh_return \ |
68cbb7e3 | 73 | && (EH_RETURN_DATA_REGNO (0) == REGNO \ |
74 | || EH_RETURN_DATA_REGNO (1) == REGNO \ | |
75 | || EH_RETURN_DATA_REGNO (2) == REGNO \ | |
76 | || EH_RETURN_DATA_REGNO (3) == REGNO)) | |
77 | ||
d68ffc6f | 78 | /* For the default ABI, we rename registers at output-time to fill the gap |
79 | between the (statically partitioned) saved registers and call-clobbered | |
80 | registers. In effect this makes unused call-saved registers to be used | |
81 | as call-clobbered registers. The benefit comes from keeping the number | |
82 | of local registers (value of rL) low, since there's a cost of | |
d3310704 | 83 | increasing rL and clearing unused (unset) registers with lower numbers. |
84 | Don't translate while outputting the prologue. */ | |
d68ffc6f | 85 | #define MMIX_OUTPUT_REGNO(N) \ |
86 | (TARGET_ABI_GNU \ | |
0b123c47 | 87 | || (int) (N) < MMIX_RETURN_VALUE_REGNUM \ |
88 | || (int) (N) > MMIX_LAST_STACK_REGISTER_REGNUM \ | |
d3310704 | 89 | || cfun == NULL \ |
90 | || cfun->machine == NULL \ | |
91 | || cfun->machine->in_prologue \ | |
d68ffc6f | 92 | ? (N) : ((N) - MMIX_RETURN_VALUE_REGNUM \ |
93 | + cfun->machine->highest_saved_stack_register + 1)) | |
94 | ||
0b123c47 | 95 | /* The %d in "POP %d,0". */ |
96 | #define MMIX_POP_ARGUMENT() \ | |
97 | ((! TARGET_ABI_GNU \ | |
abe32cce | 98 | && crtl->return_rtx != NULL \ |
18d50ae6 | 99 | && ! cfun->returns_struct) \ |
abe32cce | 100 | ? (GET_CODE (crtl->return_rtx) == PARALLEL \ |
101 | ? GET_NUM_ELEM (XVEC (crtl->return_rtx, 0)) : 1) \ | |
0b123c47 | 102 | : 0) |
103 | ||
68cbb7e3 | 104 | /* The canonical saved comparison operands for non-cc0 machines, set in |
105 | the compare expander. */ | |
106 | rtx mmix_compare_op0; | |
107 | rtx mmix_compare_op1; | |
108 | ||
68cbb7e3 | 109 | /* Declarations of locals. */ |
110 | ||
68cbb7e3 | 111 | /* Intermediate for insn output. */ |
112 | static int mmix_output_destination_register; | |
113 | ||
4c834714 | 114 | static void mmix_option_override (void); |
40fe393f | 115 | static void mmix_asm_output_source_filename (FILE *, const char *); |
68cbb7e3 | 116 | static void mmix_output_shiftvalue_op_from_str |
7585fcd5 | 117 | (FILE *, const char *, HOST_WIDEST_INT); |
118 | static void mmix_output_shifted_value (FILE *, HOST_WIDEST_INT); | |
7a7fb407 | 119 | static void mmix_output_condition (FILE *, const_rtx, int); |
7585fcd5 | 120 | static void mmix_output_octa (FILE *, HOST_WIDEST_INT, int); |
121 | static bool mmix_assemble_integer (rtx, unsigned int, int); | |
122 | static struct machine_function *mmix_init_machine_status (void); | |
123 | static void mmix_encode_section_info (tree, rtx, int); | |
124 | static const char *mmix_strip_name_encoding (const char *); | |
125 | static void mmix_emit_sp_add (HOST_WIDE_INT offset); | |
126 | static void mmix_target_asm_function_prologue (FILE *, HOST_WIDE_INT); | |
127 | static void mmix_target_asm_function_end_prologue (FILE *); | |
128 | static void mmix_target_asm_function_epilogue (FILE *, HOST_WIDE_INT); | |
27925877 | 129 | static reg_class_t mmix_preferred_reload_class (rtx, reg_class_t); |
130 | static reg_class_t mmix_preferred_output_reload_class (rtx, reg_class_t); | |
fd50b071 | 131 | static bool mmix_legitimate_address_p (enum machine_mode, rtx, bool); |
ca316360 | 132 | static bool mmix_legitimate_constant_p (enum machine_mode, rtx); |
7585fcd5 | 133 | static void mmix_reorg (void); |
6988553d | 134 | static void mmix_asm_output_mi_thunk |
7585fcd5 | 135 | (FILE *, tree, HOST_WIDE_INT, HOST_WIDE_INT, tree); |
9e4a734a | 136 | static void mmix_setup_incoming_varargs |
39cba157 | 137 | (cumulative_args_t, enum machine_mode, tree, int *, int); |
7585fcd5 | 138 | static void mmix_file_start (void); |
139 | static void mmix_file_end (void); | |
20d892d1 | 140 | static bool mmix_rtx_costs (rtx, int, int, int, int *, bool); |
f7e13ca6 | 141 | static int mmix_register_move_cost (enum machine_mode, |
142 | reg_class_t, reg_class_t); | |
9e4a734a | 143 | static rtx mmix_struct_value_rtx (tree, int); |
3b2411a8 | 144 | static enum machine_mode mmix_promote_function_mode (const_tree, |
145 | enum machine_mode, | |
146 | int *, const_tree, int); | |
39cba157 | 147 | static void mmix_function_arg_advance (cumulative_args_t, enum machine_mode, |
5d246ebf | 148 | const_tree, bool); |
39cba157 | 149 | static rtx mmix_function_arg_1 (const cumulative_args_t, enum machine_mode, |
5d246ebf | 150 | const_tree, bool, bool); |
39cba157 | 151 | static rtx mmix_function_incoming_arg (cumulative_args_t, enum machine_mode, |
5d246ebf | 152 | const_tree, bool); |
39cba157 | 153 | static rtx mmix_function_arg (cumulative_args_t, enum machine_mode, |
5d246ebf | 154 | const_tree, bool); |
b600778c | 155 | static rtx mmix_function_value (const_tree, const_tree, bool); |
156 | static rtx mmix_libcall_value (enum machine_mode, const_rtx); | |
157 | static bool mmix_function_value_regno_p (const unsigned int); | |
39cba157 | 158 | static bool mmix_pass_by_reference (cumulative_args_t, |
fb80456a | 159 | enum machine_mode, const_tree, bool); |
5a1c68c3 | 160 | static bool mmix_frame_pointer_required (void); |
604d844a | 161 | static void mmix_asm_trampoline_template (FILE *); |
162 | static void mmix_trampoline_init (rtx, tree, rtx); | |
7a7fb407 | 163 | static void mmix_print_operand (FILE *, rtx, int); |
164 | static void mmix_print_operand_address (FILE *, rtx); | |
165 | static bool mmix_print_operand_punct_valid_p (unsigned char); | |
b2d7ede1 | 166 | static void mmix_conditional_register_usage (void); |
68cbb7e3 | 167 | |
168 | /* Target structure macros. Listed by node. See `Using and Porting GCC' | |
169 | for a general description. */ | |
170 | ||
171 | /* Node: Function Entry */ | |
172 | ||
58356836 | 173 | #undef TARGET_ASM_BYTE_OP |
174 | #define TARGET_ASM_BYTE_OP NULL | |
175 | #undef TARGET_ASM_ALIGNED_HI_OP | |
176 | #define TARGET_ASM_ALIGNED_HI_OP NULL | |
177 | #undef TARGET_ASM_ALIGNED_SI_OP | |
178 | #define TARGET_ASM_ALIGNED_SI_OP NULL | |
179 | #undef TARGET_ASM_ALIGNED_DI_OP | |
180 | #define TARGET_ASM_ALIGNED_DI_OP NULL | |
181 | #undef TARGET_ASM_INTEGER | |
182 | #define TARGET_ASM_INTEGER mmix_assemble_integer | |
183 | ||
68cbb7e3 | 184 | #undef TARGET_ASM_FUNCTION_PROLOGUE |
185 | #define TARGET_ASM_FUNCTION_PROLOGUE mmix_target_asm_function_prologue | |
186 | ||
d3310704 | 187 | #undef TARGET_ASM_FUNCTION_END_PROLOGUE |
188 | #define TARGET_ASM_FUNCTION_END_PROLOGUE mmix_target_asm_function_end_prologue | |
189 | ||
68cbb7e3 | 190 | #undef TARGET_ASM_FUNCTION_EPILOGUE |
191 | #define TARGET_ASM_FUNCTION_EPILOGUE mmix_target_asm_function_epilogue | |
192 | ||
7a7fb407 | 193 | #undef TARGET_PRINT_OPERAND |
194 | #define TARGET_PRINT_OPERAND mmix_print_operand | |
195 | #undef TARGET_PRINT_OPERAND_ADDRESS | |
196 | #define TARGET_PRINT_OPERAND_ADDRESS mmix_print_operand_address | |
197 | #undef TARGET_PRINT_OPERAND_PUNCT_VALID_P | |
198 | #define TARGET_PRINT_OPERAND_PUNCT_VALID_P mmix_print_operand_punct_valid_p | |
199 | ||
7811991d | 200 | #undef TARGET_ENCODE_SECTION_INFO |
201 | #define TARGET_ENCODE_SECTION_INFO mmix_encode_section_info | |
7b4a38a6 | 202 | #undef TARGET_STRIP_NAME_ENCODING |
203 | #define TARGET_STRIP_NAME_ENCODING mmix_strip_name_encoding | |
7811991d | 204 | |
6988553d | 205 | #undef TARGET_ASM_OUTPUT_MI_THUNK |
206 | #define TARGET_ASM_OUTPUT_MI_THUNK mmix_asm_output_mi_thunk | |
eb344f43 | 207 | #undef TARGET_ASM_CAN_OUTPUT_MI_THUNK |
208 | #define TARGET_ASM_CAN_OUTPUT_MI_THUNK default_can_output_mi_thunk_no_vcall | |
92c473b8 | 209 | #undef TARGET_ASM_FILE_START |
210 | #define TARGET_ASM_FILE_START mmix_file_start | |
211 | #undef TARGET_ASM_FILE_START_FILE_DIRECTIVE | |
212 | #define TARGET_ASM_FILE_START_FILE_DIRECTIVE true | |
f6940372 | 213 | #undef TARGET_ASM_FILE_END |
214 | #define TARGET_ASM_FILE_END mmix_file_end | |
40fe393f | 215 | #undef TARGET_ASM_OUTPUT_SOURCE_FILENAME |
216 | #define TARGET_ASM_OUTPUT_SOURCE_FILENAME mmix_asm_output_source_filename | |
6988553d | 217 | |
b2d7ede1 | 218 | #undef TARGET_CONDITIONAL_REGISTER_USAGE |
219 | #define TARGET_CONDITIONAL_REGISTER_USAGE mmix_conditional_register_usage | |
220 | ||
fab7adbf | 221 | #undef TARGET_RTX_COSTS |
222 | #define TARGET_RTX_COSTS mmix_rtx_costs | |
ec0457a8 | 223 | #undef TARGET_ADDRESS_COST |
d9c5e5f4 | 224 | #define TARGET_ADDRESS_COST hook_int_rtx_mode_as_bool_0 |
fab7adbf | 225 | |
f7e13ca6 | 226 | #undef TARGET_REGISTER_MOVE_COST |
227 | #define TARGET_REGISTER_MOVE_COST mmix_register_move_cost | |
228 | ||
2efea8c0 | 229 | #undef TARGET_MACHINE_DEPENDENT_REORG |
230 | #define TARGET_MACHINE_DEPENDENT_REORG mmix_reorg | |
231 | ||
3b2411a8 | 232 | #undef TARGET_PROMOTE_FUNCTION_MODE |
233 | #define TARGET_PROMOTE_FUNCTION_MODE mmix_promote_function_mode | |
234 | ||
b600778c | 235 | #undef TARGET_FUNCTION_VALUE |
236 | #define TARGET_FUNCTION_VALUE mmix_function_value | |
237 | #undef TARGET_LIBCALL_VALUE | |
238 | #define TARGET_LIBCALL_VALUE mmix_libcall_value | |
239 | #undef TARGET_FUNCTION_VALUE_REGNO_P | |
240 | #define TARGET_FUNCTION_VALUE_REGNO_P mmix_function_value_regno_p | |
9e4a734a | 241 | |
5d246ebf | 242 | #undef TARGET_FUNCTION_ARG |
243 | #define TARGET_FUNCTION_ARG mmix_function_arg | |
244 | #undef TARGET_FUNCTION_INCOMING_ARG | |
245 | #define TARGET_FUNCTION_INCOMING_ARG mmix_function_incoming_arg | |
246 | #undef TARGET_FUNCTION_ARG_ADVANCE | |
247 | #define TARGET_FUNCTION_ARG_ADVANCE mmix_function_arg_advance | |
9e4a734a | 248 | #undef TARGET_STRUCT_VALUE_RTX |
249 | #define TARGET_STRUCT_VALUE_RTX mmix_struct_value_rtx | |
9e4a734a | 250 | #undef TARGET_SETUP_INCOMING_VARARGS |
251 | #define TARGET_SETUP_INCOMING_VARARGS mmix_setup_incoming_varargs | |
b981d932 | 252 | #undef TARGET_PASS_BY_REFERENCE |
253 | #define TARGET_PASS_BY_REFERENCE mmix_pass_by_reference | |
13f08ee7 | 254 | #undef TARGET_CALLEE_COPIES |
255 | #define TARGET_CALLEE_COPIES hook_bool_CUMULATIVE_ARGS_mode_tree_bool_true | |
9e4a734a | 256 | |
27925877 | 257 | #undef TARGET_PREFERRED_RELOAD_CLASS |
258 | #define TARGET_PREFERRED_RELOAD_CLASS mmix_preferred_reload_class | |
259 | #undef TARGET_PREFERRED_OUTPUT_RELOAD_CLASS | |
f7b18294 | 260 | #define TARGET_PREFERRED_OUTPUT_RELOAD_CLASS mmix_preferred_output_reload_class |
27925877 | 261 | |
fd50b071 | 262 | #undef TARGET_LEGITIMATE_ADDRESS_P |
263 | #define TARGET_LEGITIMATE_ADDRESS_P mmix_legitimate_address_p | |
ca316360 | 264 | #undef TARGET_LEGITIMATE_CONSTANT_P |
265 | #define TARGET_LEGITIMATE_CONSTANT_P mmix_legitimate_constant_p | |
fd50b071 | 266 | |
5a1c68c3 | 267 | #undef TARGET_FRAME_POINTER_REQUIRED |
268 | #define TARGET_FRAME_POINTER_REQUIRED mmix_frame_pointer_required | |
269 | ||
604d844a | 270 | #undef TARGET_ASM_TRAMPOLINE_TEMPLATE |
271 | #define TARGET_ASM_TRAMPOLINE_TEMPLATE mmix_asm_trampoline_template | |
272 | #undef TARGET_TRAMPOLINE_INIT | |
273 | #define TARGET_TRAMPOLINE_INIT mmix_trampoline_init | |
274 | ||
4c834714 | 275 | #undef TARGET_OPTION_OVERRIDE |
276 | #define TARGET_OPTION_OVERRIDE mmix_option_override | |
277 | ||
68cbb7e3 | 278 | struct gcc_target targetm = TARGET_INITIALIZER; |
279 | ||
280 | /* Functions that are expansions for target macros. | |
281 | See Target Macros in `Using and Porting GCC'. */ | |
282 | ||
4c834714 | 283 | /* TARGET_OPTION_OVERRIDE. */ |
68cbb7e3 | 284 | |
4c834714 | 285 | static void |
286 | mmix_option_override (void) | |
68cbb7e3 | 287 | { |
288 | /* Should we err or should we warn? Hmm. At least we must neutralize | |
289 | it. For example the wrong kind of case-tables will be generated with | |
290 | PIC; we use absolute address items for mmixal compatibility. FIXME: | |
291 | They could be relative if we just elide them to after all pertinent | |
292 | labels. */ | |
293 | if (flag_pic) | |
294 | { | |
c3ceba8e | 295 | warning (0, "-f%s not supported: ignored", (flag_pic > 1) ? "PIC" : "pic"); |
68cbb7e3 | 296 | flag_pic = 0; |
297 | } | |
68cbb7e3 | 298 | } |
299 | ||
300 | /* INIT_EXPANDERS. */ | |
301 | ||
302 | void | |
7585fcd5 | 303 | mmix_init_expanders (void) |
68cbb7e3 | 304 | { |
305 | init_machine_status = mmix_init_machine_status; | |
306 | } | |
307 | ||
308 | /* Set the per-function data. */ | |
309 | ||
1f3233d1 | 310 | static struct machine_function * |
7585fcd5 | 311 | mmix_init_machine_status (void) |
68cbb7e3 | 312 | { |
ba72912a | 313 | return ggc_alloc_cleared_machine_function (); |
68cbb7e3 | 314 | } |
315 | ||
a16734cd | 316 | /* DATA_ABI_ALIGNMENT. |
68cbb7e3 | 317 | We have trouble getting the address of stuff that is located at other |
318 | than 32-bit alignments (GETA requirements), so try to give everything | |
1d60d981 | 319 | at least 32-bit alignment. */ |
68cbb7e3 | 320 | |
321 | int | |
7585fcd5 | 322 | mmix_data_alignment (tree type ATTRIBUTE_UNUSED, int basic_align) |
68cbb7e3 | 323 | { |
324 | if (basic_align < 32) | |
325 | return 32; | |
326 | ||
327 | return basic_align; | |
328 | } | |
329 | ||
330 | /* CONSTANT_ALIGNMENT. */ | |
331 | ||
332 | int | |
7585fcd5 | 333 | mmix_constant_alignment (tree constant ATTRIBUTE_UNUSED, int basic_align) |
68cbb7e3 | 334 | { |
335 | if (basic_align < 32) | |
336 | return 32; | |
337 | ||
338 | return basic_align; | |
339 | } | |
340 | ||
341 | /* LOCAL_ALIGNMENT. */ | |
342 | ||
c0dae7df | 343 | unsigned |
344 | mmix_local_alignment (tree type ATTRIBUTE_UNUSED, unsigned basic_align) | |
68cbb7e3 | 345 | { |
346 | if (basic_align < 32) | |
347 | return 32; | |
348 | ||
349 | return basic_align; | |
350 | } | |
351 | ||
b2d7ede1 | 352 | /* TARGET_CONDITIONAL_REGISTER_USAGE. */ |
68cbb7e3 | 353 | |
b2d7ede1 | 354 | static void |
7585fcd5 | 355 | mmix_conditional_register_usage (void) |
68cbb7e3 | 356 | { |
357 | int i; | |
358 | ||
359 | if (TARGET_ABI_GNU) | |
360 | { | |
361 | static const int gnu_abi_reg_alloc_order[] | |
362 | = MMIX_GNU_ABI_REG_ALLOC_ORDER; | |
363 | ||
364 | for (i = 0; i < FIRST_PSEUDO_REGISTER; i++) | |
365 | reg_alloc_order[i] = gnu_abi_reg_alloc_order[i]; | |
366 | ||
367 | /* Change the default from the mmixware ABI. For the GNU ABI, | |
368 | $15..$30 are call-saved just as $0..$14. There must be one | |
d3310704 | 369 | call-clobbered local register for the "hole" that holds the |
370 | number of saved local registers saved by PUSHJ/PUSHGO during the | |
371 | function call, receiving the return value at return. So best is | |
372 | to use the highest, $31. It's already marked call-clobbered for | |
373 | the mmixware ABI. */ | |
68cbb7e3 | 374 | for (i = 15; i <= 30; i++) |
375 | call_used_regs[i] = 0; | |
f0b228a5 | 376 | |
377 | /* "Unfix" the parameter registers. */ | |
378 | for (i = MMIX_RESERVED_GNU_ARG_0_REGNUM; | |
379 | i < MMIX_RESERVED_GNU_ARG_0_REGNUM + MMIX_MAX_ARGS_IN_REGS; | |
380 | i++) | |
381 | fixed_regs[i] = 0; | |
68cbb7e3 | 382 | } |
383 | ||
384 | /* Step over the ":" in special register names. */ | |
385 | if (! TARGET_TOPLEVEL_SYMBOLS) | |
386 | for (i = 0; i < FIRST_PSEUDO_REGISTER; i++) | |
387 | if (reg_names[i][0] == ':') | |
388 | reg_names[i]++; | |
389 | } | |
390 | ||
6d1f3d31 | 391 | /* INCOMING_REGNO and OUTGOING_REGNO worker function. |
392 | Those two macros must only be applied to function argument | |
4d19e7b3 | 393 | registers and the function return value register for the opposite |
394 | use. FIXME: for their current use in gcc, it'd be better with an | |
395 | explicit specific additional FUNCTION_INCOMING_ARG_REGNO_P a'la | |
396 | TARGET_FUNCTION_ARG / TARGET_FUNCTION_INCOMING_ARG instead of | |
5d246ebf | 397 | forcing the target to commit to a fixed mapping and for any |
4d19e7b3 | 398 | unspecified register use. Particularly when thinking about the |
399 | return-value, it is better to imagine INCOMING_REGNO and | |
400 | OUTGOING_REGNO as named CALLEE_TO_CALLER_REGNO and INNER_REGNO as | |
401 | named CALLER_TO_CALLEE_REGNO because the direction. The "incoming" | |
402 | and "outgoing" is from the perspective of the parameter-registers, | |
403 | but the same macro is (must be, lacking an alternative like | |
404 | suggested above) used to map the return-value-register from the | |
405 | same perspective. To make directions even more confusing, the macro | |
406 | MMIX_OUTGOING_RETURN_VALUE_REGNUM holds the number of the register | |
407 | in which to return a value, i.e. INCOMING_REGNO for the return-value- | |
408 | register as received from a called function; the return-value on the | |
409 | way out. */ | |
6d1f3d31 | 410 | |
411 | int | |
412 | mmix_opposite_regno (int regno, int incoming) | |
413 | { | |
4d19e7b3 | 414 | if (incoming && regno == MMIX_OUTGOING_RETURN_VALUE_REGNUM) |
415 | return MMIX_RETURN_VALUE_REGNUM; | |
416 | ||
417 | if (!incoming && regno == MMIX_RETURN_VALUE_REGNUM) | |
418 | return MMIX_OUTGOING_RETURN_VALUE_REGNUM; | |
419 | ||
6d1f3d31 | 420 | if (!mmix_function_arg_regno_p (regno, incoming)) |
421 | return regno; | |
422 | ||
423 | return | |
424 | regno - (incoming | |
425 | ? MMIX_FIRST_INCOMING_ARG_REGNUM - MMIX_FIRST_ARG_REGNUM | |
426 | : MMIX_FIRST_ARG_REGNUM - MMIX_FIRST_INCOMING_ARG_REGNUM); | |
427 | } | |
428 | ||
d3310704 | 429 | /* LOCAL_REGNO. |
430 | All registers that are part of the register stack and that will be | |
431 | saved are local. */ | |
432 | ||
433 | int | |
7585fcd5 | 434 | mmix_local_regno (int regno) |
d3310704 | 435 | { |
436 | return regno <= MMIX_LAST_STACK_REGISTER_REGNUM && !call_used_regs[regno]; | |
437 | } | |
438 | ||
27925877 | 439 | /* TARGET_PREFERRED_RELOAD_CLASS. |
68cbb7e3 | 440 | We need to extend the reload class of REMAINDER_REG and HIMULT_REG. */ |
441 | ||
27925877 | 442 | static reg_class_t |
443 | mmix_preferred_reload_class (rtx x, reg_class_t rclass) | |
68cbb7e3 | 444 | { |
445 | /* FIXME: Revisit. */ | |
446 | return GET_CODE (x) == MOD && GET_MODE (x) == DImode | |
8deb3959 | 447 | ? REMAINDER_REG : rclass; |
68cbb7e3 | 448 | } |
449 | ||
27925877 | 450 | /* TARGET_PREFERRED_OUTPUT_RELOAD_CLASS. |
68cbb7e3 | 451 | We need to extend the reload class of REMAINDER_REG and HIMULT_REG. */ |
452 | ||
27925877 | 453 | static reg_class_t |
454 | mmix_preferred_output_reload_class (rtx x, reg_class_t rclass) | |
68cbb7e3 | 455 | { |
456 | /* FIXME: Revisit. */ | |
457 | return GET_CODE (x) == MOD && GET_MODE (x) == DImode | |
8deb3959 | 458 | ? REMAINDER_REG : rclass; |
68cbb7e3 | 459 | } |
460 | ||
461 | /* SECONDARY_RELOAD_CLASS. | |
462 | We need to reload regs of REMAINDER_REG and HIMULT_REG elsewhere. */ | |
463 | ||
464 | enum reg_class | |
8deb3959 | 465 | mmix_secondary_reload_class (enum reg_class rclass, |
7585fcd5 | 466 | enum machine_mode mode ATTRIBUTE_UNUSED, |
467 | rtx x ATTRIBUTE_UNUSED, | |
468 | int in_p ATTRIBUTE_UNUSED) | |
68cbb7e3 | 469 | { |
8deb3959 | 470 | if (rclass == REMAINDER_REG |
471 | || rclass == HIMULT_REG | |
472 | || rclass == SYSTEM_REGS) | |
68cbb7e3 | 473 | return GENERAL_REGS; |
474 | ||
68cbb7e3 | 475 | return NO_REGS; |
476 | } | |
477 | ||
68cbb7e3 | 478 | /* DYNAMIC_CHAIN_ADDRESS. */ |
479 | ||
480 | rtx | |
7585fcd5 | 481 | mmix_dynamic_chain_address (rtx frame) |
68cbb7e3 | 482 | { |
483 | /* FIXME: the frame-pointer is stored at offset -8 from the current | |
484 | frame-pointer. Unfortunately, the caller assumes that a | |
485 | frame-pointer is present for *all* previous frames. There should be | |
486 | a way to say that that cannot be done, like for RETURN_ADDR_RTX. */ | |
29c05e22 | 487 | return plus_constant (Pmode, frame, -8); |
68cbb7e3 | 488 | } |
489 | ||
490 | /* STARTING_FRAME_OFFSET. */ | |
491 | ||
492 | int | |
7585fcd5 | 493 | mmix_starting_frame_offset (void) |
68cbb7e3 | 494 | { |
495 | /* The old frame pointer is in the slot below the new one, so | |
496 | FIRST_PARM_OFFSET does not need to depend on whether the | |
497 | frame-pointer is needed or not. We have to adjust for the register | |
498 | stack pointer being located below the saved frame pointer. | |
499 | Similarly, we store the return address on the stack too, for | |
500 | exception handling, and always if we save the register stack pointer. */ | |
501 | return | |
502 | (-8 | |
503 | + (MMIX_CFUN_HAS_LANDING_PAD | |
504 | ? -16 : (MMIX_CFUN_NEEDS_SAVED_EH_RETURN_ADDRESS ? -8 : 0))); | |
505 | } | |
506 | ||
507 | /* RETURN_ADDR_RTX. */ | |
508 | ||
509 | rtx | |
7585fcd5 | 510 | mmix_return_addr_rtx (int count, rtx frame ATTRIBUTE_UNUSED) |
68cbb7e3 | 511 | { |
512 | return count == 0 | |
513 | ? (MMIX_CFUN_NEEDS_SAVED_EH_RETURN_ADDRESS | |
af08e904 | 514 | /* FIXME: Set frame_alias_set on the following. (Why?) |
515 | See mmix_initial_elimination_offset for the reason we can't use | |
516 | get_hard_reg_initial_val for both. Always using a stack slot | |
517 | and not a register would be suboptimal. */ | |
29c05e22 | 518 | ? validize_mem (gen_rtx_MEM (Pmode, |
519 | plus_constant (Pmode, | |
520 | frame_pointer_rtx, -16))) | |
68cbb7e3 | 521 | : get_hard_reg_initial_val (Pmode, MMIX_INCOMING_RETURN_ADDRESS_REGNUM)) |
522 | : NULL_RTX; | |
523 | } | |
524 | ||
525 | /* SETUP_FRAME_ADDRESSES. */ | |
526 | ||
527 | void | |
7585fcd5 | 528 | mmix_setup_frame_addresses (void) |
68cbb7e3 | 529 | { |
530 | /* Nothing needed at the moment. */ | |
531 | } | |
532 | ||
533 | /* The difference between the (imaginary) frame pointer and the stack | |
534 | pointer. Used to eliminate the frame pointer. */ | |
535 | ||
536 | int | |
7585fcd5 | 537 | mmix_initial_elimination_offset (int fromreg, int toreg) |
68cbb7e3 | 538 | { |
539 | int regno; | |
540 | int fp_sp_offset | |
abe32cce | 541 | = (get_frame_size () + crtl->outgoing_args_size + 7) & ~7; |
68cbb7e3 | 542 | |
af08e904 | 543 | /* There is no actual offset between these two virtual values, but for |
544 | the frame-pointer, we have the old one in the stack position below | |
545 | it, so the offset for the frame-pointer to the stack-pointer is one | |
546 | octabyte larger. */ | |
68cbb7e3 | 547 | if (fromreg == MMIX_ARG_POINTER_REGNUM |
548 | && toreg == MMIX_FRAME_POINTER_REGNUM) | |
549 | return 0; | |
550 | ||
551 | /* The difference is the size of local variables plus the size of | |
552 | outgoing function arguments that would normally be passed as | |
553 | registers but must be passed on stack because we're out of | |
554 | function-argument registers. Only global saved registers are | |
555 | counted; the others go on the register stack. | |
556 | ||
557 | The frame-pointer is counted too if it is what is eliminated, as we | |
558 | need to balance the offset for it from STARTING_FRAME_OFFSET. | |
559 | ||
560 | Also add in the slot for the register stack pointer we save if we | |
561 | have a landing pad. | |
562 | ||
563 | Unfortunately, we can't access $0..$14, from unwinder code easily, so | |
564 | store the return address in a frame slot too. FIXME: Only for | |
565 | non-leaf functions. FIXME: Always with a landing pad, because it's | |
566 | hard to know whether we need the other at the time we know we need | |
567 | the offset for one (and have to state it). It's a kludge until we | |
568 | can express the register stack in the EH frame info. | |
569 | ||
570 | We have to do alignment here; get_frame_size will not return a | |
571 | multiple of STACK_BOUNDARY. FIXME: Add note in manual. */ | |
572 | ||
573 | for (regno = MMIX_FIRST_GLOBAL_REGNUM; | |
574 | regno <= 255; | |
575 | regno++) | |
3072d30e | 576 | if ((df_regs_ever_live_p (regno) && ! call_used_regs[regno]) |
68cbb7e3 | 577 | || IS_MMIX_EH_RETURN_DATA_REG (regno)) |
578 | fp_sp_offset += 8; | |
579 | ||
580 | return fp_sp_offset | |
581 | + (MMIX_CFUN_HAS_LANDING_PAD | |
582 | ? 16 : (MMIX_CFUN_NEEDS_SAVED_EH_RETURN_ADDRESS ? 8 : 0)) | |
583 | + (fromreg == MMIX_ARG_POINTER_REGNUM ? 0 : 8); | |
584 | } | |
585 | ||
5d246ebf | 586 | static void |
39cba157 | 587 | mmix_function_arg_advance (cumulative_args_t argsp_v, enum machine_mode mode, |
5d246ebf | 588 | const_tree type, bool named ATTRIBUTE_UNUSED) |
589 | { | |
39cba157 | 590 | CUMULATIVE_ARGS *argsp = get_cumulative_args (argsp_v); |
5d246ebf | 591 | int arg_size = MMIX_FUNCTION_ARG_SIZE (mode, type); |
592 | ||
593 | argsp->regs = ((targetm.calls.must_pass_in_stack (mode, type) | |
594 | || (arg_size > 8 | |
595 | && !TARGET_LIBFUNC | |
596 | && !argsp->lib)) | |
597 | ? (MMIX_MAX_ARGS_IN_REGS) + 1 | |
598 | : argsp->regs + (7 + arg_size) / 8); | |
599 | } | |
68cbb7e3 | 600 | |
5d246ebf | 601 | /* Helper function for mmix_function_arg and mmix_function_incoming_arg. */ |
602 | ||
603 | static rtx | |
39cba157 | 604 | mmix_function_arg_1 (const cumulative_args_t argsp_v, |
5d246ebf | 605 | enum machine_mode mode, |
606 | const_tree type, | |
607 | bool named ATTRIBUTE_UNUSED, | |
608 | bool incoming) | |
68cbb7e3 | 609 | { |
39cba157 | 610 | CUMULATIVE_ARGS *argsp = get_cumulative_args (argsp_v); |
611 | ||
68cbb7e3 | 612 | /* Last-argument marker. */ |
613 | if (type == void_type_node) | |
614 | return (argsp->regs < MMIX_MAX_ARGS_IN_REGS) | |
615 | ? gen_rtx_REG (mode, | |
616 | (incoming | |
617 | ? MMIX_FIRST_INCOMING_ARG_REGNUM | |
618 | : MMIX_FIRST_ARG_REGNUM) + argsp->regs) | |
619 | : NULL_RTX; | |
620 | ||
621 | return (argsp->regs < MMIX_MAX_ARGS_IN_REGS | |
0336f0f0 | 622 | && !targetm.calls.must_pass_in_stack (mode, type) |
68cbb7e3 | 623 | && (GET_MODE_BITSIZE (mode) <= 64 |
624 | || argsp->lib | |
625 | || TARGET_LIBFUNC)) | |
626 | ? gen_rtx_REG (mode, | |
627 | (incoming | |
628 | ? MMIX_FIRST_INCOMING_ARG_REGNUM | |
629 | : MMIX_FIRST_ARG_REGNUM) | |
630 | + argsp->regs) | |
631 | : NULL_RTX; | |
632 | } | |
633 | ||
5d246ebf | 634 | /* Return an rtx for a function argument to go in a register, and 0 for |
635 | one that must go on stack. */ | |
636 | ||
637 | static rtx | |
39cba157 | 638 | mmix_function_arg (cumulative_args_t argsp, |
5d246ebf | 639 | enum machine_mode mode, |
640 | const_tree type, | |
641 | bool named) | |
642 | { | |
643 | return mmix_function_arg_1 (argsp, mode, type, named, false); | |
644 | } | |
645 | ||
646 | static rtx | |
39cba157 | 647 | mmix_function_incoming_arg (cumulative_args_t argsp, |
5d246ebf | 648 | enum machine_mode mode, |
649 | const_tree type, | |
650 | bool named) | |
651 | { | |
652 | return mmix_function_arg_1 (argsp, mode, type, named, true); | |
653 | } | |
654 | ||
68cbb7e3 | 655 | /* Returns nonzero for everything that goes by reference, 0 for |
656 | everything that goes by value. */ | |
657 | ||
b981d932 | 658 | static bool |
39cba157 | 659 | mmix_pass_by_reference (cumulative_args_t argsp_v, enum machine_mode mode, |
fb80456a | 660 | const_tree type, bool named ATTRIBUTE_UNUSED) |
68cbb7e3 | 661 | { |
39cba157 | 662 | CUMULATIVE_ARGS *argsp = get_cumulative_args (argsp_v); |
663 | ||
0336f0f0 | 664 | /* FIXME: Check: I'm not sure the must_pass_in_stack check is |
68cbb7e3 | 665 | necessary. */ |
bef380a4 | 666 | if (targetm.calls.must_pass_in_stack (mode, type)) |
667 | return true; | |
668 | ||
669 | if (MMIX_FUNCTION_ARG_SIZE (mode, type) > 8 | |
670 | && !TARGET_LIBFUNC | |
671 | && (!argsp || !argsp->lib)) | |
672 | return true; | |
673 | ||
674 | return false; | |
68cbb7e3 | 675 | } |
676 | ||
677 | /* Return nonzero if regno is a register number where a parameter is | |
678 | passed, and 0 otherwise. */ | |
679 | ||
680 | int | |
7585fcd5 | 681 | mmix_function_arg_regno_p (int regno, int incoming) |
68cbb7e3 | 682 | { |
683 | int first_arg_regnum | |
684 | = incoming ? MMIX_FIRST_INCOMING_ARG_REGNUM : MMIX_FIRST_ARG_REGNUM; | |
685 | ||
686 | return regno >= first_arg_regnum | |
687 | && regno < first_arg_regnum + MMIX_MAX_ARGS_IN_REGS; | |
688 | } | |
689 | ||
b600778c | 690 | /* Implements TARGET_FUNCTION_VALUE. */ |
68cbb7e3 | 691 | |
b600778c | 692 | static rtx |
693 | mmix_function_value (const_tree valtype, | |
694 | const_tree func ATTRIBUTE_UNUSED, | |
695 | bool outgoing) | |
68cbb7e3 | 696 | { |
697 | enum machine_mode mode = TYPE_MODE (valtype); | |
68cbb7e3 | 698 | enum machine_mode cmode; |
699 | int first_val_regnum = MMIX_OUTGOING_RETURN_VALUE_REGNUM; | |
700 | rtx vec[MMIX_MAX_REGS_FOR_VALUE]; | |
701 | int i; | |
702 | int nregs; | |
703 | ||
b600778c | 704 | if (!outgoing) |
705 | return gen_rtx_REG (mode, MMIX_RETURN_VALUE_REGNUM); | |
706 | ||
68cbb7e3 | 707 | /* Return values that fit in a register need no special handling. |
708 | There's no register hole when parameters are passed in global | |
709 | registers. */ | |
710 | if (TARGET_ABI_GNU | |
711 | || GET_MODE_BITSIZE (mode) <= BITS_PER_WORD) | |
712 | return | |
713 | gen_rtx_REG (mode, MMIX_OUTGOING_RETURN_VALUE_REGNUM); | |
714 | ||
fb89a8c9 | 715 | if (COMPLEX_MODE_P (mode)) |
716 | /* A complex type, made up of components. */ | |
717 | cmode = TYPE_MODE (TREE_TYPE (valtype)); | |
718 | else | |
719 | { | |
720 | /* Of the other larger-than-register modes, we only support | |
721 | scalar mode TImode. (At least, that's the only one that's | |
722 | been rudimentally tested.) Make sure we're alerted for | |
723 | unexpected cases. */ | |
724 | if (mode != TImode) | |
725 | sorry ("support for mode %qs", GET_MODE_NAME (mode)); | |
726 | ||
727 | /* In any case, we will fill registers to the natural size. */ | |
728 | cmode = DImode; | |
729 | } | |
730 | ||
68cbb7e3 | 731 | nregs = ((GET_MODE_BITSIZE (mode) + BITS_PER_WORD - 1) / BITS_PER_WORD); |
732 | ||
733 | /* We need to take care of the effect of the register hole on return | |
734 | values of large sizes; the last register will appear as the first | |
735 | register, with the rest shifted. (For complex modes, this is just | |
736 | swapped registers.) */ | |
737 | ||
738 | if (nregs > MMIX_MAX_REGS_FOR_VALUE) | |
68435912 | 739 | internal_error ("too large function value type, needs %d registers,\ |
68cbb7e3 | 740 | have only %d registers for this", nregs, MMIX_MAX_REGS_FOR_VALUE); |
741 | ||
742 | /* FIXME: Maybe we should handle structure values like this too | |
743 | (adjusted for BLKmode), perhaps for both ABI:s. */ | |
744 | for (i = 0; i < nregs - 1; i++) | |
745 | vec[i] | |
746 | = gen_rtx_EXPR_LIST (VOIDmode, | |
747 | gen_rtx_REG (cmode, first_val_regnum + i), | |
748 | GEN_INT ((i + 1) * BITS_PER_UNIT)); | |
749 | ||
750 | vec[nregs - 1] | |
751 | = gen_rtx_EXPR_LIST (VOIDmode, | |
752 | gen_rtx_REG (cmode, first_val_regnum + nregs - 1), | |
bcd9bd66 | 753 | const0_rtx); |
68cbb7e3 | 754 | |
2bdda7ee | 755 | return gen_rtx_PARALLEL (mode, gen_rtvec_v (nregs, vec)); |
68cbb7e3 | 756 | } |
757 | ||
b600778c | 758 | /* Implements TARGET_LIBCALL_VALUE. */ |
c715d549 | 759 | |
b600778c | 760 | static rtx |
761 | mmix_libcall_value (enum machine_mode mode, | |
762 | const_rtx fun ATTRIBUTE_UNUSED) | |
763 | { | |
764 | return gen_rtx_REG (mode, MMIX_RETURN_VALUE_REGNUM); | |
765 | } | |
766 | ||
767 | /* Implements TARGET_FUNCTION_VALUE_REGNO_P. */ | |
768 | ||
769 | static bool | |
770 | mmix_function_value_regno_p (const unsigned int regno) | |
c715d549 | 771 | { |
772 | return regno == MMIX_RETURN_VALUE_REGNUM; | |
773 | } | |
774 | ||
68cbb7e3 | 775 | /* EH_RETURN_DATA_REGNO. */ |
776 | ||
777 | int | |
7585fcd5 | 778 | mmix_eh_return_data_regno (int n) |
68cbb7e3 | 779 | { |
780 | if (n >= 0 && n < 4) | |
781 | return MMIX_EH_RETURN_DATA_REGNO_START + n; | |
782 | ||
783 | return INVALID_REGNUM; | |
784 | } | |
785 | ||
786 | /* EH_RETURN_STACKADJ_RTX. */ | |
787 | ||
788 | rtx | |
7585fcd5 | 789 | mmix_eh_return_stackadj_rtx (void) |
68cbb7e3 | 790 | { |
791 | return gen_rtx_REG (Pmode, MMIX_EH_RETURN_STACKADJ_REGNUM); | |
792 | } | |
793 | ||
794 | /* EH_RETURN_HANDLER_RTX. */ | |
795 | ||
796 | rtx | |
7585fcd5 | 797 | mmix_eh_return_handler_rtx (void) |
68cbb7e3 | 798 | { |
7585fcd5 | 799 | return gen_rtx_REG (Pmode, MMIX_INCOMING_RETURN_ADDRESS_REGNUM); |
68cbb7e3 | 800 | } |
801 | ||
802 | /* ASM_PREFERRED_EH_DATA_FORMAT. */ | |
803 | ||
804 | int | |
7585fcd5 | 805 | mmix_asm_preferred_eh_data_format (int code ATTRIBUTE_UNUSED, |
806 | int global ATTRIBUTE_UNUSED) | |
68cbb7e3 | 807 | { |
808 | /* This is the default (was at 2001-07-20). Revisit when needed. */ | |
809 | return DW_EH_PE_absptr; | |
810 | } | |
811 | ||
28c2d844 | 812 | /* Make a note that we've seen the beginning of the prologue. This |
d3310704 | 813 | matters to whether we'll translate register numbers as calculated by |
2efea8c0 | 814 | mmix_reorg. */ |
68cbb7e3 | 815 | |
d3310704 | 816 | static void |
7585fcd5 | 817 | mmix_target_asm_function_prologue (FILE *stream ATTRIBUTE_UNUSED, |
818 | HOST_WIDE_INT framesize ATTRIBUTE_UNUSED) | |
68cbb7e3 | 819 | { |
d3310704 | 820 | cfun->machine->in_prologue = 1; |
821 | } | |
68cbb7e3 | 822 | |
d3310704 | 823 | /* Make a note that we've seen the end of the prologue. */ |
68cbb7e3 | 824 | |
d3310704 | 825 | static void |
7585fcd5 | 826 | mmix_target_asm_function_end_prologue (FILE *stream ATTRIBUTE_UNUSED) |
d3310704 | 827 | { |
828 | cfun->machine->in_prologue = 0; | |
d68ffc6f | 829 | } |
830 | ||
2efea8c0 | 831 | /* Implement TARGET_MACHINE_DEPENDENT_REORG. No actual rearrangements |
832 | done here; just virtually by calculating the highest saved stack | |
833 | register number used to modify the register numbers at output time. */ | |
d68ffc6f | 834 | |
2efea8c0 | 835 | static void |
7585fcd5 | 836 | mmix_reorg (void) |
d68ffc6f | 837 | { |
838 | int regno; | |
68cbb7e3 | 839 | |
840 | /* We put the number of the highest saved register-file register in a | |
841 | location convenient for the call-patterns to output. Note that we | |
842 | don't tell dwarf2 about these registers, since it can't restore them | |
843 | anyway. */ | |
d68ffc6f | 844 | for (regno = MMIX_LAST_STACK_REGISTER_REGNUM; |
68cbb7e3 | 845 | regno >= 0; |
846 | regno--) | |
3072d30e | 847 | if ((df_regs_ever_live_p (regno) && !call_used_regs[regno]) |
68cbb7e3 | 848 | || (regno == MMIX_FRAME_POINTER_REGNUM && frame_pointer_needed)) |
849 | break; | |
850 | ||
d68ffc6f | 851 | /* Regardless of whether they're saved (they might be just read), we |
852 | mustn't include registers that carry parameters. We could scan the | |
853 | insns to see whether they're actually used (and indeed do other less | |
854 | trivial register usage analysis and transformations), but it seems | |
855 | wasteful to optimize for unused parameter registers. As of | |
3072d30e | 856 | 2002-04-30, df_regs_ever_live_p (n) seems to be set for only-reads too, but |
d68ffc6f | 857 | that might change. */ |
abe32cce | 858 | if (!TARGET_ABI_GNU && regno < crtl->args.info.regs - 1) |
d68ffc6f | 859 | { |
abe32cce | 860 | regno = crtl->args.info.regs - 1; |
d68ffc6f | 861 | |
862 | /* We don't want to let this cause us to go over the limit and make | |
863 | incoming parameter registers be misnumbered and treating the last | |
864 | parameter register and incoming return value register call-saved. | |
865 | Stop things at the unmodified scheme. */ | |
866 | if (regno > MMIX_RETURN_VALUE_REGNUM - 1) | |
867 | regno = MMIX_RETURN_VALUE_REGNUM - 1; | |
868 | } | |
869 | ||
870 | cfun->machine->highest_saved_stack_register = regno; | |
68cbb7e3 | 871 | } |
872 | ||
873 | /* TARGET_ASM_FUNCTION_EPILOGUE. */ | |
874 | ||
4448bfa5 | 875 | static void |
7585fcd5 | 876 | mmix_target_asm_function_epilogue (FILE *stream, |
877 | HOST_WIDE_INT locals_size ATTRIBUTE_UNUSED) | |
68cbb7e3 | 878 | { |
d3310704 | 879 | /* Emit an \n for readability of the generated assembly. */ |
880 | fputc ('\n', stream); | |
881 | } | |
68cbb7e3 | 882 | |
e7f5e241 | 883 | /* TARGET_ASM_OUTPUT_MI_THUNK. */ |
68cbb7e3 | 884 | |
6988553d | 885 | static void |
7585fcd5 | 886 | mmix_asm_output_mi_thunk (FILE *stream, |
887 | tree fndecl ATTRIBUTE_UNUSED, | |
888 | HOST_WIDE_INT delta, | |
889 | HOST_WIDE_INT vcall_offset ATTRIBUTE_UNUSED, | |
890 | tree func) | |
d3310704 | 891 | { |
6644435d | 892 | /* If you define TARGET_STRUCT_VALUE_RTX that returns 0 (i.e. pass |
893 | location of structure to return as invisible first argument), you | |
894 | need to tweak this code too. */ | |
d3310704 | 895 | const char *regname = reg_names[MMIX_FIRST_INCOMING_ARG_REGNUM]; |
68cbb7e3 | 896 | |
d3310704 | 897 | if (delta >= 0 && delta < 65536) |
e7f5e241 | 898 | fprintf (stream, "\tINCL %s,%d\n", regname, (int)delta); |
d3310704 | 899 | else if (delta < 0 && delta >= -255) |
e7f5e241 | 900 | fprintf (stream, "\tSUBU %s,%s,%d\n", regname, regname, (int)-delta); |
d3310704 | 901 | else |
0b123c47 | 902 | { |
d3310704 | 903 | mmix_output_register_setting (stream, 255, delta, 1); |
7fe1d31c | 904 | fprintf (stream, "\tADDU %s,%s,$255\n", regname, regname); |
0b123c47 | 905 | } |
906 | ||
d3310704 | 907 | fprintf (stream, "\tJMP "); |
908 | assemble_name (stream, XSTR (XEXP (DECL_RTL (func), 0), 0)); | |
909 | fprintf (stream, "\n"); | |
910 | } | |
68cbb7e3 | 911 | |
d3310704 | 912 | /* FUNCTION_PROFILER. */ |
68cbb7e3 | 913 | |
d3310704 | 914 | void |
7585fcd5 | 915 | mmix_function_profiler (FILE *stream ATTRIBUTE_UNUSED, |
916 | int labelno ATTRIBUTE_UNUSED) | |
d3310704 | 917 | { |
918 | sorry ("function_profiler support for MMIX"); | |
919 | } | |
68cbb7e3 | 920 | |
9e4a734a | 921 | /* Worker function for TARGET_SETUP_INCOMING_VARARGS. For the moment, |
922 | let's stick to pushing argument registers on the stack. Later, we | |
923 | can parse all arguments in registers, to improve performance. */ | |
68cbb7e3 | 924 | |
9e4a734a | 925 | static void |
39cba157 | 926 | mmix_setup_incoming_varargs (cumulative_args_t args_so_farp_v, |
7585fcd5 | 927 | enum machine_mode mode, |
928 | tree vartype, | |
929 | int *pretend_sizep, | |
930 | int second_time ATTRIBUTE_UNUSED) | |
68cbb7e3 | 931 | { |
39cba157 | 932 | CUMULATIVE_ARGS *args_so_farp = get_cumulative_args (args_so_farp_v); |
933 | ||
7ccc713a | 934 | /* The last named variable has been handled, but |
935 | args_so_farp has not been advanced for it. */ | |
936 | if (args_so_farp->regs + 1 < MMIX_MAX_ARGS_IN_REGS) | |
937 | *pretend_sizep = (MMIX_MAX_ARGS_IN_REGS - (args_so_farp->regs + 1)) * 8; | |
68cbb7e3 | 938 | |
939 | /* We assume that one argument takes up one register here. That should | |
5aedf60c | 940 | be true until we start messing with multi-reg parameters. */ |
68cbb7e3 | 941 | if ((7 + (MMIX_FUNCTION_ARG_SIZE (mode, vartype))) / 8 != 1) |
942 | internal_error ("MMIX Internal: Last named vararg would not fit in a register"); | |
943 | } | |
944 | ||
604d844a | 945 | /* TARGET_ASM_TRAMPOLINE_TEMPLATE. */ |
68cbb7e3 | 946 | |
604d844a | 947 | static void |
948 | mmix_asm_trampoline_template (FILE *stream) | |
68cbb7e3 | 949 | { |
af08e904 | 950 | /* Read a value into the static-chain register and jump somewhere. The |
951 | static chain is stored at offset 16, and the function address is | |
952 | stored at offset 24. */ | |
604d844a | 953 | |
68cbb7e3 | 954 | fprintf (stream, "\tGETA $255,1F\n\t"); |
604d844a | 955 | fprintf (stream, "LDOU %s,$255,0\n\t", reg_names[MMIX_STATIC_CHAIN_REGNUM]); |
68cbb7e3 | 956 | fprintf (stream, "LDOU $255,$255,8\n\t"); |
957 | fprintf (stream, "GO $255,$255,0\n"); | |
958 | fprintf (stream, "1H\tOCTA 0\n\t"); | |
959 | fprintf (stream, "OCTA 0\n"); | |
960 | } | |
961 | ||
604d844a | 962 | /* TARGET_TRAMPOLINE_INIT. */ |
68cbb7e3 | 963 | /* Set the static chain and function pointer field in the trampoline. |
964 | We also SYNCID here to be sure (doesn't matter in the simulator, but | |
965 | some day it will). */ | |
966 | ||
604d844a | 967 | static void |
968 | mmix_trampoline_init (rtx m_tramp, tree fndecl, rtx static_chain) | |
969 | { | |
970 | rtx fnaddr = XEXP (DECL_RTL (fndecl), 0); | |
971 | rtx mem; | |
972 | ||
973 | emit_block_move (m_tramp, assemble_trampoline_template (), | |
974 | GEN_INT (2*UNITS_PER_WORD), BLOCK_OP_NORMAL); | |
975 | ||
976 | mem = adjust_address (m_tramp, DImode, 2*UNITS_PER_WORD); | |
977 | emit_move_insn (mem, static_chain); | |
978 | mem = adjust_address (m_tramp, DImode, 3*UNITS_PER_WORD); | |
979 | emit_move_insn (mem, fnaddr); | |
980 | ||
981 | mem = adjust_address (m_tramp, DImode, 0); | |
982 | emit_insn (gen_sync_icache (mem, GEN_INT (TRAMPOLINE_SIZE - 1))); | |
68cbb7e3 | 983 | } |
984 | ||
985 | /* We must exclude constant addresses that have an increment that is not a | |
986 | multiple of four bytes because of restrictions of the GETA | |
f0b228a5 | 987 | instruction, unless TARGET_BASE_ADDRESSES. */ |
68cbb7e3 | 988 | |
989 | int | |
7585fcd5 | 990 | mmix_constant_address_p (rtx x) |
68cbb7e3 | 991 | { |
992 | RTX_CODE code = GET_CODE (x); | |
993 | int addend = 0; | |
f0b228a5 | 994 | /* When using "base addresses", anything constant goes. */ |
995 | int constant_ok = TARGET_BASE_ADDRESSES != 0; | |
68cbb7e3 | 996 | |
68cbb7e3 | 997 | switch (code) |
998 | { | |
999 | case LABEL_REF: | |
1000 | case SYMBOL_REF: | |
1001 | return 1; | |
1002 | ||
68cbb7e3 | 1003 | case HIGH: |
f0b228a5 | 1004 | /* FIXME: Don't know how to dissect these. Avoid them for now, |
1005 | except we know they're constants. */ | |
1006 | return constant_ok; | |
68cbb7e3 | 1007 | |
1008 | case CONST_INT: | |
1009 | addend = INTVAL (x); | |
1010 | break; | |
1011 | ||
1012 | case CONST_DOUBLE: | |
1013 | if (GET_MODE (x) != VOIDmode) | |
1014 | /* Strange that we got here. FIXME: Check if we do. */ | |
f0b228a5 | 1015 | return constant_ok; |
68cbb7e3 | 1016 | addend = CONST_DOUBLE_LOW (x); |
1017 | break; | |
1018 | ||
1019 | case CONST: | |
1020 | /* Note that expressions with arithmetic on forward references don't | |
1021 | work in mmixal. People using gcc assembly code with mmixal might | |
1022 | need to move arrays and such to before the point of use. */ | |
1023 | if (GET_CODE (XEXP (x, 0)) == PLUS) | |
1024 | { | |
1025 | rtx x0 = XEXP (XEXP (x, 0), 0); | |
1026 | rtx x1 = XEXP (XEXP (x, 0), 1); | |
1027 | ||
1028 | if ((GET_CODE (x0) == SYMBOL_REF | |
1029 | || GET_CODE (x0) == LABEL_REF) | |
1030 | && (GET_CODE (x1) == CONST_INT | |
1031 | || (GET_CODE (x1) == CONST_DOUBLE | |
1032 | && GET_MODE (x1) == VOIDmode))) | |
1033 | addend = mmix_intval (x1); | |
1034 | else | |
f0b228a5 | 1035 | return constant_ok; |
68cbb7e3 | 1036 | } |
1037 | else | |
f0b228a5 | 1038 | return constant_ok; |
68cbb7e3 | 1039 | break; |
1040 | ||
1041 | default: | |
1042 | return 0; | |
1043 | } | |
1044 | ||
f0b228a5 | 1045 | return constant_ok || (addend & 3) == 0; |
68cbb7e3 | 1046 | } |
1047 | ||
fd50b071 | 1048 | /* Return 1 if the address is OK, otherwise 0. */ |
68cbb7e3 | 1049 | |
fd50b071 | 1050 | bool |
1051 | mmix_legitimate_address_p (enum machine_mode mode ATTRIBUTE_UNUSED, | |
1052 | rtx x, | |
1053 | bool strict_checking) | |
68cbb7e3 | 1054 | { |
1055 | #define MMIX_REG_OK(X) \ | |
1056 | ((strict_checking \ | |
1057 | && (REGNO (X) <= MMIX_LAST_GENERAL_REGISTER \ | |
1058 | || (reg_renumber[REGNO (X)] > 0 \ | |
1059 | && reg_renumber[REGNO (X)] <= MMIX_LAST_GENERAL_REGISTER))) \ | |
1060 | || (!strict_checking \ | |
1061 | && (REGNO (X) <= MMIX_LAST_GENERAL_REGISTER \ | |
1062 | || REGNO (X) >= FIRST_PSEUDO_REGISTER \ | |
1063 | || REGNO (X) == ARG_POINTER_REGNUM))) | |
1064 | ||
1065 | /* We only accept: | |
1066 | (mem reg) | |
1067 | (mem (plus reg reg)) | |
f0b228a5 | 1068 | (mem (plus reg 0..255)). |
1069 | unless TARGET_BASE_ADDRESSES, in which case we accept all | |
1070 | (mem constant_address) too. */ | |
68cbb7e3 | 1071 | |
1072 | ||
1073 | /* (mem reg) */ | |
1074 | if (REG_P (x) && MMIX_REG_OK (x)) | |
1075 | return 1; | |
1076 | ||
1077 | if (GET_CODE(x) == PLUS) | |
1078 | { | |
1079 | rtx x1 = XEXP (x, 0); | |
1080 | rtx x2 = XEXP (x, 1); | |
1081 | ||
1082 | /* Try swapping the order. FIXME: Do we need this? */ | |
1083 | if (! REG_P (x1)) | |
1084 | { | |
1085 | rtx tem = x1; | |
1086 | x1 = x2; | |
1087 | x2 = tem; | |
1088 | } | |
1089 | ||
f0b228a5 | 1090 | /* (mem (plus (reg?) (?))) */ |
68cbb7e3 | 1091 | if (!REG_P (x1) || !MMIX_REG_OK (x1)) |
f0b228a5 | 1092 | return TARGET_BASE_ADDRESSES && mmix_constant_address_p (x); |
68cbb7e3 | 1093 | |
f0b228a5 | 1094 | /* (mem (plus (reg) (reg?))) */ |
68cbb7e3 | 1095 | if (REG_P (x2) && MMIX_REG_OK (x2)) |
1096 | return 1; | |
1097 | ||
f0b228a5 | 1098 | /* (mem (plus (reg) (0..255?))) */ |
f105c84e | 1099 | if (satisfies_constraint_I (x2)) |
68cbb7e3 | 1100 | return 1; |
f0b228a5 | 1101 | |
1102 | return 0; | |
68cbb7e3 | 1103 | } |
1104 | ||
f0b228a5 | 1105 | return TARGET_BASE_ADDRESSES && mmix_constant_address_p (x); |
68cbb7e3 | 1106 | } |
1107 | ||
ca316360 | 1108 | /* Implement TARGET_LEGITIMATE_CONSTANT_P. */ |
68cbb7e3 | 1109 | |
ca316360 | 1110 | static bool |
1111 | mmix_legitimate_constant_p (enum machine_mode mode ATTRIBUTE_UNUSED, rtx x) | |
68cbb7e3 | 1112 | { |
1113 | RTX_CODE code = GET_CODE (x); | |
1114 | ||
1115 | /* We must allow any number due to the way the cse passes works; if we | |
1116 | do not allow any number here, general_operand will fail, and insns | |
1117 | will fatally fail recognition instead of "softly". */ | |
1118 | if (code == CONST_INT || code == CONST_DOUBLE) | |
1119 | return 1; | |
1120 | ||
1121 | return CONSTANT_ADDRESS_P (x); | |
1122 | } | |
1123 | ||
1124 | /* SELECT_CC_MODE. */ | |
1125 | ||
1126 | enum machine_mode | |
7585fcd5 | 1127 | mmix_select_cc_mode (RTX_CODE op, rtx x, rtx y ATTRIBUTE_UNUSED) |
68cbb7e3 | 1128 | { |
1129 | /* We use CCmode, CC_UNSmode, CC_FPmode, CC_FPEQmode and CC_FUNmode to | |
1130 | output different compare insns. Note that we do not check the | |
1131 | validity of the comparison here. */ | |
1132 | ||
1133 | if (GET_MODE_CLASS (GET_MODE (x)) == MODE_FLOAT) | |
1134 | { | |
1135 | if (op == ORDERED || op == UNORDERED || op == UNGE | |
1136 | || op == UNGT || op == UNLE || op == UNLT) | |
1137 | return CC_FUNmode; | |
1138 | ||
1139 | if (op == EQ || op == NE) | |
1140 | return CC_FPEQmode; | |
1141 | ||
1142 | return CC_FPmode; | |
1143 | } | |
1144 | ||
1145 | if (op == GTU || op == LTU || op == GEU || op == LEU) | |
1146 | return CC_UNSmode; | |
1147 | ||
1148 | return CCmode; | |
1149 | } | |
1150 | ||
68cbb7e3 | 1151 | /* REVERSIBLE_CC_MODE. */ |
1152 | ||
1153 | int | |
7585fcd5 | 1154 | mmix_reversible_cc_mode (enum machine_mode mode) |
68cbb7e3 | 1155 | { |
1156 | /* That is, all integer and the EQ, NE, ORDERED and UNORDERED float | |
581084df | 1157 | compares. */ |
68cbb7e3 | 1158 | return mode != CC_FPmode; |
1159 | } | |
1160 | ||
fab7adbf | 1161 | /* TARGET_RTX_COSTS. */ |
68cbb7e3 | 1162 | |
fab7adbf | 1163 | static bool |
7585fcd5 | 1164 | mmix_rtx_costs (rtx x ATTRIBUTE_UNUSED, |
1165 | int code ATTRIBUTE_UNUSED, | |
1166 | int outer_code ATTRIBUTE_UNUSED, | |
20d892d1 | 1167 | int opno ATTRIBUTE_UNUSED, |
f529eb25 | 1168 | int *total ATTRIBUTE_UNUSED, |
1169 | bool speed ATTRIBUTE_UNUSED) | |
68cbb7e3 | 1170 | { |
1171 | /* For the time being, this is just a stub and we'll accept the | |
1172 | generic calculations, until we can do measurements, at least. | |
1173 | Say we did not modify any calculated costs. */ | |
fab7adbf | 1174 | return false; |
68cbb7e3 | 1175 | } |
1176 | ||
f7e13ca6 | 1177 | /* TARGET_REGISTER_MOVE_COST. |
68cbb7e3 | 1178 | |
f7e13ca6 | 1179 | The special registers can only move to and from general regs, and we |
1180 | need to check that their constraints match, so say 3 for them. */ | |
1181 | ||
1182 | static int | |
7585fcd5 | 1183 | mmix_register_move_cost (enum machine_mode mode ATTRIBUTE_UNUSED, |
f7e13ca6 | 1184 | reg_class_t from, |
1185 | reg_class_t to) | |
68cbb7e3 | 1186 | { |
1187 | return (from == GENERAL_REGS && from == to) ? 2 : 3; | |
1188 | } | |
1189 | ||
1190 | /* Note that we don't have a TEXT_SECTION_ASM_OP, because it has to be a | |
1191 | compile-time constant; it's used in an asm in crtstuff.c, compiled for | |
1192 | the target. */ | |
1193 | ||
1194 | /* DATA_SECTION_ASM_OP. */ | |
1195 | ||
1196 | const char * | |
7585fcd5 | 1197 | mmix_data_section_asm_op (void) |
68cbb7e3 | 1198 | { |
1199 | return "\t.data ! mmixal:= 8H LOC 9B"; | |
1200 | } | |
1201 | ||
7811991d | 1202 | static void |
7585fcd5 | 1203 | mmix_encode_section_info (tree decl, rtx rtl, int first) |
68cbb7e3 | 1204 | { |
1205 | /* Test for an external declaration, and do nothing if it is one. */ | |
1206 | if ((TREE_CODE (decl) == VAR_DECL | |
91009d64 | 1207 | && (DECL_EXTERNAL (decl) || TREE_PUBLIC (decl))) |
1208 | || (TREE_CODE (decl) == FUNCTION_DECL && TREE_PUBLIC (decl))) | |
68cbb7e3 | 1209 | ; |
ae484cc8 | 1210 | else if (first && DECL_P (decl)) |
68cbb7e3 | 1211 | { |
1212 | /* For non-visible declarations, add a "@" prefix, which we skip | |
1213 | when the label is output. If the label does not have this | |
f0b228a5 | 1214 | prefix, a ":" is output if -mtoplevel-symbols. |
68cbb7e3 | 1215 | |
1216 | Note that this does not work for data that is declared extern and | |
1217 | later defined as static. If there's code in between, that code | |
f0b228a5 | 1218 | will refer to the extern declaration, and vice versa. This just |
1219 | means that when -mtoplevel-symbols is in use, we can just handle | |
1220 | well-behaved ISO-compliant code. */ | |
68cbb7e3 | 1221 | |
2c129d70 | 1222 | const char *str = XSTR (XEXP (rtl, 0), 0); |
68cbb7e3 | 1223 | int len = strlen (str); |
225ab426 | 1224 | char *newstr = XALLOCAVEC (char, len + 2); |
b948ae2f | 1225 | newstr[0] = '@'; |
68cbb7e3 | 1226 | strcpy (newstr + 1, str); |
b948ae2f | 1227 | XSTR (XEXP (rtl, 0), 0) = ggc_alloc_string (newstr, len + 1); |
68cbb7e3 | 1228 | } |
1229 | ||
f0b228a5 | 1230 | /* Set SYMBOL_REF_FLAG for things that we want to access with GETA. We |
1231 | may need different options to reach for different things with GETA. | |
1232 | For now, functions and things we know or have been told are constant. */ | |
1233 | if (TREE_CODE (decl) == FUNCTION_DECL | |
1234 | || TREE_CONSTANT (decl) | |
1235 | || (TREE_CODE (decl) == VAR_DECL | |
1236 | && TREE_READONLY (decl) | |
1237 | && !TREE_SIDE_EFFECTS (decl) | |
1238 | && (!DECL_INITIAL (decl) | |
1239 | || TREE_CONSTANT (DECL_INITIAL (decl))))) | |
2c129d70 | 1240 | SYMBOL_REF_FLAG (XEXP (rtl, 0)) = 1; |
68cbb7e3 | 1241 | } |
1242 | ||
7b4a38a6 | 1243 | static const char * |
7585fcd5 | 1244 | mmix_strip_name_encoding (const char *name) |
68cbb7e3 | 1245 | { |
1246 | for (; (*name == '@' || *name == '*'); name++) | |
1247 | ; | |
1248 | ||
1249 | return name; | |
1250 | } | |
1251 | ||
92c473b8 | 1252 | /* TARGET_ASM_FILE_START. |
1253 | We just emit a little comment for the time being. */ | |
68cbb7e3 | 1254 | |
92c473b8 | 1255 | static void |
7585fcd5 | 1256 | mmix_file_start (void) |
68cbb7e3 | 1257 | { |
92c473b8 | 1258 | default_file_start (); |
68cbb7e3 | 1259 | |
92c473b8 | 1260 | fputs ("! mmixal:= 8H LOC Data_Section\n", asm_out_file); |
68cbb7e3 | 1261 | |
1d60d981 | 1262 | /* Make sure each file starts with the text section. */ |
2f14b1f9 | 1263 | switch_to_section (text_section); |
68cbb7e3 | 1264 | } |
1265 | ||
f6940372 | 1266 | /* TARGET_ASM_FILE_END. */ |
68cbb7e3 | 1267 | |
f6940372 | 1268 | static void |
7585fcd5 | 1269 | mmix_file_end (void) |
68cbb7e3 | 1270 | { |
1d60d981 | 1271 | /* Make sure each file ends with the data section. */ |
2f14b1f9 | 1272 | switch_to_section (data_section); |
68cbb7e3 | 1273 | } |
1274 | ||
40fe393f | 1275 | /* TARGET_ASM_OUTPUT_SOURCE_FILENAME. */ |
68cbb7e3 | 1276 | |
40fe393f | 1277 | static void |
7585fcd5 | 1278 | mmix_asm_output_source_filename (FILE *stream, const char *name) |
68cbb7e3 | 1279 | { |
1280 | fprintf (stream, "# 1 "); | |
1281 | OUTPUT_QUOTED_STRING (stream, name); | |
1282 | fprintf (stream, "\n"); | |
1283 | } | |
1284 | ||
1285 | /* OUTPUT_QUOTED_STRING. */ | |
1286 | ||
1287 | void | |
7585fcd5 | 1288 | mmix_output_quoted_string (FILE *stream, const char *string, int length) |
68cbb7e3 | 1289 | { |
1290 | const char * string_end = string + length; | |
25037517 | 1291 | static const char *const unwanted_chars = "\"[]\\"; |
68cbb7e3 | 1292 | |
1293 | /* Output "any character except newline and double quote character". We | |
1294 | play it safe and avoid all control characters too. We also do not | |
1295 | want [] as characters, should input be passed through m4 with [] as | |
1296 | quotes. Further, we avoid "\", because the GAS port handles it as a | |
1297 | quoting character. */ | |
1298 | while (string < string_end) | |
1299 | { | |
1300 | if (*string | |
1301 | && (unsigned char) *string < 128 | |
1302 | && !ISCNTRL (*string) | |
1303 | && strchr (unwanted_chars, *string) == NULL) | |
1304 | { | |
1305 | fputc ('"', stream); | |
1306 | while (*string | |
1307 | && (unsigned char) *string < 128 | |
1308 | && !ISCNTRL (*string) | |
1309 | && strchr (unwanted_chars, *string) == NULL | |
1310 | && string < string_end) | |
1311 | { | |
1312 | fputc (*string, stream); | |
1313 | string++; | |
1314 | } | |
1315 | fputc ('"', stream); | |
1316 | if (string < string_end) | |
1317 | fprintf (stream, ","); | |
1318 | } | |
1319 | if (string < string_end) | |
1320 | { | |
1321 | fprintf (stream, "#%x", *string & 255); | |
1322 | string++; | |
1323 | if (string < string_end) | |
1324 | fprintf (stream, ","); | |
1325 | } | |
1326 | } | |
1327 | } | |
1328 | ||
58356836 | 1329 | /* Target hook for assembling integer objects. Use mmix_print_operand |
1330 | for WYDE and TETRA. Use mmix_output_octa to output 8-byte | |
1331 | CONST_DOUBLEs. */ | |
68cbb7e3 | 1332 | |
58356836 | 1333 | static bool |
7585fcd5 | 1334 | mmix_assemble_integer (rtx x, unsigned int size, int aligned_p) |
68cbb7e3 | 1335 | { |
58356836 | 1336 | if (aligned_p) |
1337 | switch (size) | |
1338 | { | |
4f4e478d | 1339 | /* We handle a limited number of types of operands in here. But |
1340 | that's ok, because we can punt to generic functions. We then | |
5c3d1711 | 1341 | pretend that aligned data isn't needed, so the usual .<pseudo> |
1342 | syntax is used (which works for aligned data too). We actually | |
1343 | *must* do that, since we say we don't have simple aligned | |
1344 | pseudos, causing this function to be called. We just try and | |
1345 | keep as much compatibility as possible with mmixal syntax for | |
1346 | normal cases (i.e. without GNU extensions and C only). */ | |
58356836 | 1347 | case 1: |
4f4e478d | 1348 | if (GET_CODE (x) != CONST_INT) |
1349 | { | |
1350 | aligned_p = 0; | |
1351 | break; | |
1352 | } | |
58356836 | 1353 | fputs ("\tBYTE\t", asm_out_file); |
1354 | mmix_print_operand (asm_out_file, x, 'B'); | |
1355 | fputc ('\n', asm_out_file); | |
1356 | return true; | |
1357 | ||
1358 | case 2: | |
4f4e478d | 1359 | if (GET_CODE (x) != CONST_INT) |
1360 | { | |
1361 | aligned_p = 0; | |
1362 | break; | |
1363 | } | |
58356836 | 1364 | fputs ("\tWYDE\t", asm_out_file); |
1365 | mmix_print_operand (asm_out_file, x, 'W'); | |
1366 | fputc ('\n', asm_out_file); | |
1367 | return true; | |
1368 | ||
1369 | case 4: | |
60bb373d | 1370 | if (GET_CODE (x) != CONST_INT) |
4f4e478d | 1371 | { |
1372 | aligned_p = 0; | |
1373 | break; | |
1374 | } | |
58356836 | 1375 | fputs ("\tTETRA\t", asm_out_file); |
1376 | mmix_print_operand (asm_out_file, x, 'L'); | |
1377 | fputc ('\n', asm_out_file); | |
1378 | return true; | |
1379 | ||
1380 | case 8: | |
7f81c162 | 1381 | /* We don't get here anymore for CONST_DOUBLE, because DImode |
1382 | isn't expressed as CONST_DOUBLE, and DFmode is handled | |
1383 | elsewhere. */ | |
1384 | gcc_assert (GET_CODE (x) != CONST_DOUBLE); | |
4f4e478d | 1385 | assemble_integer_with_op ("\tOCTA\t", x); |
58356836 | 1386 | return true; |
1387 | } | |
1388 | return default_assemble_integer (x, size, aligned_p); | |
68cbb7e3 | 1389 | } |
1390 | ||
1391 | /* ASM_OUTPUT_ASCII. */ | |
1392 | ||
1393 | void | |
7585fcd5 | 1394 | mmix_asm_output_ascii (FILE *stream, const char *string, int length) |
68cbb7e3 | 1395 | { |
1396 | while (length > 0) | |
1397 | { | |
1398 | int chunk_size = length > 60 ? 60 : length; | |
1399 | fprintf (stream, "\tBYTE "); | |
1400 | mmix_output_quoted_string (stream, string, chunk_size); | |
1401 | string += chunk_size; | |
1402 | length -= chunk_size; | |
1403 | fprintf (stream, "\n"); | |
1404 | } | |
1405 | } | |
1406 | ||
1407 | /* ASM_OUTPUT_ALIGNED_COMMON. */ | |
1408 | ||
1409 | void | |
7585fcd5 | 1410 | mmix_asm_output_aligned_common (FILE *stream, |
1411 | const char *name, | |
1412 | int size, | |
1413 | int align) | |
68cbb7e3 | 1414 | { |
1415 | /* This is mostly the elfos.h one. There doesn't seem to be a way to | |
1416 | express this in a mmixal-compatible way. */ | |
1417 | fprintf (stream, "\t.comm\t"); | |
1418 | assemble_name (stream, name); | |
1419 | fprintf (stream, ",%u,%u ! mmixal-incompatible COMMON\n", | |
1420 | size, align / BITS_PER_UNIT); | |
1421 | } | |
1422 | ||
1423 | /* ASM_OUTPUT_ALIGNED_LOCAL. */ | |
1424 | ||
1425 | void | |
7585fcd5 | 1426 | mmix_asm_output_aligned_local (FILE *stream, |
1427 | const char *name, | |
1428 | int size, | |
1429 | int align) | |
68cbb7e3 | 1430 | { |
2f14b1f9 | 1431 | switch_to_section (data_section); |
68cbb7e3 | 1432 | |
1433 | ASM_OUTPUT_ALIGN (stream, exact_log2 (align/BITS_PER_UNIT)); | |
1434 | assemble_name (stream, name); | |
1435 | fprintf (stream, "\tLOC @+%d\n", size); | |
1436 | } | |
1437 | ||
1438 | /* ASM_OUTPUT_LABEL. */ | |
1439 | ||
1440 | void | |
7585fcd5 | 1441 | mmix_asm_output_label (FILE *stream, const char *name) |
68cbb7e3 | 1442 | { |
1443 | assemble_name (stream, name); | |
1444 | fprintf (stream, "\tIS @\n"); | |
1445 | } | |
1446 | ||
af1c039b | 1447 | /* ASM_OUTPUT_INTERNAL_LABEL. */ |
1448 | ||
1449 | void | |
1450 | mmix_asm_output_internal_label (FILE *stream, const char *name) | |
1451 | { | |
1452 | assemble_name_raw (stream, name); | |
1453 | fprintf (stream, "\tIS @\n"); | |
1454 | } | |
1455 | ||
68cbb7e3 | 1456 | /* ASM_DECLARE_REGISTER_GLOBAL. */ |
1457 | ||
1458 | void | |
7585fcd5 | 1459 | mmix_asm_declare_register_global (FILE *stream ATTRIBUTE_UNUSED, |
1460 | tree decl ATTRIBUTE_UNUSED, | |
1461 | int regno ATTRIBUTE_UNUSED, | |
1462 | const char *name ATTRIBUTE_UNUSED) | |
68cbb7e3 | 1463 | { |
1464 | /* Nothing to do here, but there *will* be, therefore the framework is | |
1465 | here. */ | |
1466 | } | |
1467 | ||
68cbb7e3 | 1468 | /* ASM_WEAKEN_LABEL. */ |
1469 | ||
1470 | void | |
7585fcd5 | 1471 | mmix_asm_weaken_label (FILE *stream ATTRIBUTE_UNUSED, |
1472 | const char *name ATTRIBUTE_UNUSED) | |
68cbb7e3 | 1473 | { |
7fe1d31c | 1474 | fprintf (stream, "\t.weak "); |
68cbb7e3 | 1475 | assemble_name (stream, name); |
7fe1d31c | 1476 | fprintf (stream, " ! mmixal-incompatible\n"); |
68cbb7e3 | 1477 | } |
1478 | ||
1479 | /* MAKE_DECL_ONE_ONLY. */ | |
1480 | ||
1481 | void | |
7585fcd5 | 1482 | mmix_make_decl_one_only (tree decl) |
68cbb7e3 | 1483 | { |
1484 | DECL_WEAK (decl) = 1; | |
1485 | } | |
1486 | ||
1487 | /* ASM_OUTPUT_LABELREF. | |
1488 | Strip GCC's '*' and our own '@'. No order is assumed. */ | |
1489 | ||
1490 | void | |
7585fcd5 | 1491 | mmix_asm_output_labelref (FILE *stream, const char *name) |
68cbb7e3 | 1492 | { |
91009d64 | 1493 | int is_extern = 1; |
68cbb7e3 | 1494 | |
1495 | for (; (*name == '@' || *name == '*'); name++) | |
1496 | if (*name == '@') | |
91009d64 | 1497 | is_extern = 0; |
68cbb7e3 | 1498 | |
1499 | asm_fprintf (stream, "%s%U%s", | |
1500 | is_extern && TARGET_TOPLEVEL_SYMBOLS ? ":" : "", | |
1501 | name); | |
1502 | } | |
1503 | ||
68cbb7e3 | 1504 | /* ASM_OUTPUT_DEF. */ |
1505 | ||
1506 | void | |
7585fcd5 | 1507 | mmix_asm_output_def (FILE *stream, const char *name, const char *value) |
68cbb7e3 | 1508 | { |
1509 | assemble_name (stream, name); | |
1510 | fprintf (stream, "\tIS "); | |
1511 | assemble_name (stream, value); | |
1512 | fputc ('\n', stream); | |
1513 | } | |
1514 | ||
7a7fb407 | 1515 | /* TARGET_PRINT_OPERAND. */ |
68cbb7e3 | 1516 | |
7a7fb407 | 1517 | static void |
7585fcd5 | 1518 | mmix_print_operand (FILE *stream, rtx x, int code) |
68cbb7e3 | 1519 | { |
1520 | /* When we add support for different codes later, we can, when needed, | |
1521 | drop through to the main handler with a modified operand. */ | |
1522 | rtx modified_x = x; | |
d68ffc6f | 1523 | int regno = x != NULL_RTX && REG_P (x) ? REGNO (x) : 0; |
68cbb7e3 | 1524 | |
1525 | switch (code) | |
1526 | { | |
1527 | /* Unrelated codes are in alphabetic order. */ | |
1528 | ||
91009d64 | 1529 | case '+': |
1530 | /* For conditional branches, output "P" for a probable branch. */ | |
1531 | if (TARGET_BRANCH_PREDICT) | |
1532 | { | |
1533 | x = find_reg_note (current_output_insn, REG_BR_PROB, 0); | |
9eb946de | 1534 | if (x && XINT (x, 0) > REG_BR_PROB_BASE / 2) |
91009d64 | 1535 | putc ('P', stream); |
1536 | } | |
1537 | return; | |
1538 | ||
0b123c47 | 1539 | case '.': |
1540 | /* For the %d in POP %d,0. */ | |
1541 | fprintf (stream, "%d", MMIX_POP_ARGUMENT ()); | |
1542 | return; | |
1543 | ||
68cbb7e3 | 1544 | case 'B': |
1545 | if (GET_CODE (x) != CONST_INT) | |
1546 | fatal_insn ("MMIX Internal: Expected a CONST_INT, not this", x); | |
1547 | fprintf (stream, "%d", (int) (INTVAL (x) & 0xff)); | |
1548 | return; | |
1549 | ||
1550 | case 'H': | |
1551 | /* Highpart. Must be general register, and not the last one, as | |
1552 | that one cannot be part of a consecutive register pair. */ | |
d68ffc6f | 1553 | if (regno > MMIX_LAST_GENERAL_REGISTER - 1) |
1554 | internal_error ("MMIX Internal: Bad register: %d", regno); | |
68cbb7e3 | 1555 | |
1556 | /* This is big-endian, so the high-part is the first one. */ | |
d68ffc6f | 1557 | fprintf (stream, "%s", reg_names[MMIX_OUTPUT_REGNO (regno)]); |
68cbb7e3 | 1558 | return; |
1559 | ||
1560 | case 'L': | |
1561 | /* Lowpart. Must be CONST_INT or general register, and not the last | |
1562 | one, as that one cannot be part of a consecutive register pair. */ | |
1563 | if (GET_CODE (x) == CONST_INT) | |
1564 | { | |
1565 | fprintf (stream, "#%lx", | |
1566 | (unsigned long) (INTVAL (x) | |
1567 | & ((unsigned int) 0x7fffffff * 2 + 1))); | |
1568 | return; | |
1569 | } | |
1570 | ||
1571 | if (GET_CODE (x) == SYMBOL_REF) | |
1572 | { | |
1573 | output_addr_const (stream, x); | |
1574 | return; | |
1575 | } | |
1576 | ||
d68ffc6f | 1577 | if (regno > MMIX_LAST_GENERAL_REGISTER - 1) |
1578 | internal_error ("MMIX Internal: Bad register: %d", regno); | |
68cbb7e3 | 1579 | |
1580 | /* This is big-endian, so the low-part is + 1. */ | |
d68ffc6f | 1581 | fprintf (stream, "%s", reg_names[MMIX_OUTPUT_REGNO (regno) + 1]); |
68cbb7e3 | 1582 | return; |
1583 | ||
1584 | /* Can't use 'a' because that's a generic modifier for address | |
1585 | output. */ | |
1586 | case 'A': | |
1587 | mmix_output_shiftvalue_op_from_str (stream, "ANDN", | |
1588 | ~(unsigned HOST_WIDEST_INT) | |
1589 | mmix_intval (x)); | |
1590 | return; | |
1591 | ||
1592 | case 'i': | |
1593 | mmix_output_shiftvalue_op_from_str (stream, "INC", | |
1594 | (unsigned HOST_WIDEST_INT) | |
1595 | mmix_intval (x)); | |
1596 | return; | |
1597 | ||
1598 | case 'o': | |
1599 | mmix_output_shiftvalue_op_from_str (stream, "OR", | |
1600 | (unsigned HOST_WIDEST_INT) | |
1601 | mmix_intval (x)); | |
1602 | return; | |
1603 | ||
1604 | case 's': | |
1605 | mmix_output_shiftvalue_op_from_str (stream, "SET", | |
1606 | (unsigned HOST_WIDEST_INT) | |
1607 | mmix_intval (x)); | |
1608 | return; | |
1609 | ||
1610 | case 'd': | |
1611 | case 'D': | |
1612 | mmix_output_condition (stream, x, (code == 'D')); | |
1613 | return; | |
1614 | ||
1615 | case 'e': | |
1616 | /* Output an extra "e" to make fcmpe, fune. */ | |
1617 | if (TARGET_FCMP_EPSILON) | |
1618 | fprintf (stream, "e"); | |
1619 | return; | |
1620 | ||
1621 | case 'm': | |
1622 | /* Output the number minus 1. */ | |
1623 | if (GET_CODE (x) != CONST_INT) | |
1624 | { | |
1625 | fatal_insn ("MMIX Internal: Bad value for 'm', not a CONST_INT", | |
1626 | x); | |
1627 | } | |
1628 | fprintf (stream, HOST_WIDEST_INT_PRINT_DEC, | |
1629 | (HOST_WIDEST_INT) (mmix_intval (x) - 1)); | |
1630 | return; | |
1631 | ||
1632 | case 'p': | |
1633 | /* Store the number of registers we want to save. This was setup | |
1634 | by the prologue. The actual operand contains the number of | |
1635 | registers to pass, but we don't use it currently. Anyway, we | |
1636 | need to output the number of saved registers here. */ | |
d68ffc6f | 1637 | fprintf (stream, "%d", |
1638 | cfun->machine->highest_saved_stack_register + 1); | |
68cbb7e3 | 1639 | return; |
1640 | ||
1641 | case 'r': | |
1642 | /* Store the register to output a constant to. */ | |
1643 | if (! REG_P (x)) | |
68435912 | 1644 | fatal_insn ("MMIX Internal: Expected a register, not this", x); |
d68ffc6f | 1645 | mmix_output_destination_register = MMIX_OUTPUT_REGNO (regno); |
68cbb7e3 | 1646 | return; |
1647 | ||
1648 | case 'I': | |
1649 | /* Output the constant. Note that we use this for floats as well. */ | |
1650 | if (GET_CODE (x) != CONST_INT | |
1651 | && (GET_CODE (x) != CONST_DOUBLE | |
1652 | || (GET_MODE (x) != VOIDmode && GET_MODE (x) != DFmode | |
1653 | && GET_MODE (x) != SFmode))) | |
68435912 | 1654 | fatal_insn ("MMIX Internal: Expected a constant, not this", x); |
68cbb7e3 | 1655 | mmix_output_register_setting (stream, |
1656 | mmix_output_destination_register, | |
1657 | mmix_intval (x), 0); | |
1658 | return; | |
1659 | ||
1660 | case 'U': | |
1661 | /* An U for unsigned, if TARGET_ZERO_EXTEND. Ignore the operand. */ | |
1662 | if (TARGET_ZERO_EXTEND) | |
1663 | putc ('U', stream); | |
1664 | return; | |
1665 | ||
1666 | case 'v': | |
1667 | mmix_output_shifted_value (stream, (HOST_WIDEST_INT) mmix_intval (x)); | |
1668 | return; | |
1669 | ||
1670 | case 'V': | |
1671 | mmix_output_shifted_value (stream, (HOST_WIDEST_INT) ~mmix_intval (x)); | |
1672 | return; | |
1673 | ||
1674 | case 'W': | |
1675 | if (GET_CODE (x) != CONST_INT) | |
1676 | fatal_insn ("MMIX Internal: Expected a CONST_INT, not this", x); | |
1677 | fprintf (stream, "#%x", (int) (INTVAL (x) & 0xffff)); | |
1678 | return; | |
1679 | ||
1680 | case 0: | |
1681 | /* Nothing to do. */ | |
1682 | break; | |
1683 | ||
1684 | default: | |
1685 | /* Presumably there's a missing case above if we get here. */ | |
1e5fcbe2 | 1686 | internal_error ("MMIX Internal: Missing %qc case in mmix_print_operand", code); |
68cbb7e3 | 1687 | } |
1688 | ||
1689 | switch (GET_CODE (modified_x)) | |
1690 | { | |
1691 | case REG: | |
d68ffc6f | 1692 | regno = REGNO (modified_x); |
1693 | if (regno >= FIRST_PSEUDO_REGISTER) | |
1694 | internal_error ("MMIX Internal: Bad register: %d", regno); | |
1695 | fprintf (stream, "%s", reg_names[MMIX_OUTPUT_REGNO (regno)]); | |
68cbb7e3 | 1696 | return; |
1697 | ||
1698 | case MEM: | |
1699 | output_address (XEXP (modified_x, 0)); | |
1700 | return; | |
1701 | ||
1702 | case CONST_INT: | |
1703 | /* For -2147483648, mmixal complains that the constant does not fit | |
1704 | in 4 bytes, so let's output it as hex. Take care to handle hosts | |
1705 | where HOST_WIDE_INT is longer than an int. | |
1706 | ||
1707 | Print small constants +-255 using decimal. */ | |
1708 | ||
1709 | if (INTVAL (modified_x) > -256 && INTVAL (modified_x) < 256) | |
1710 | fprintf (stream, "%d", (int) (INTVAL (modified_x))); | |
1711 | else | |
1712 | fprintf (stream, "#%x", | |
1713 | (int) (INTVAL (modified_x)) & (unsigned int) ~0); | |
1714 | return; | |
1715 | ||
1716 | case CONST_DOUBLE: | |
1717 | /* Do somewhat as CONST_INT. */ | |
58356836 | 1718 | mmix_output_octa (stream, mmix_intval (modified_x), 0); |
68cbb7e3 | 1719 | return; |
1720 | ||
1721 | case CONST: | |
1722 | output_addr_const (stream, modified_x); | |
1723 | return; | |
1724 | ||
1725 | default: | |
1726 | /* No need to test for all strange things. Let output_addr_const do | |
1727 | it for us. */ | |
1728 | if (CONSTANT_P (modified_x) | |
1729 | /* Strangely enough, this is not included in CONSTANT_P. | |
1730 | FIXME: Ask/check about sanity here. */ | |
aa90bb35 | 1731 | || LABEL_P (modified_x)) |
68cbb7e3 | 1732 | { |
1733 | output_addr_const (stream, modified_x); | |
1734 | return; | |
1735 | } | |
1736 | ||
1737 | /* We need the original here. */ | |
1738 | fatal_insn ("MMIX Internal: Cannot decode this operand", x); | |
1739 | } | |
1740 | } | |
1741 | ||
7a7fb407 | 1742 | /* TARGET_PRINT_OPERAND_PUNCT_VALID_P. */ |
68cbb7e3 | 1743 | |
7a7fb407 | 1744 | static bool |
1745 | mmix_print_operand_punct_valid_p (unsigned char code) | |
68cbb7e3 | 1746 | { |
91009d64 | 1747 | /* A '+' is used for branch prediction, similar to other ports. */ |
0b123c47 | 1748 | return code == '+' |
1749 | /* A '.' is used for the %d in the POP %d,0 return insn. */ | |
1750 | || code == '.'; | |
68cbb7e3 | 1751 | } |
1752 | ||
7a7fb407 | 1753 | /* TARGET_PRINT_OPERAND_ADDRESS. */ |
68cbb7e3 | 1754 | |
7a7fb407 | 1755 | static void |
7585fcd5 | 1756 | mmix_print_operand_address (FILE *stream, rtx x) |
68cbb7e3 | 1757 | { |
1758 | if (REG_P (x)) | |
1759 | { | |
1760 | /* I find the generated assembly code harder to read without | |
1761 | the ",0". */ | |
d68ffc6f | 1762 | fprintf (stream, "%s,0", reg_names[MMIX_OUTPUT_REGNO (REGNO (x))]); |
68cbb7e3 | 1763 | return; |
1764 | } | |
1765 | else if (GET_CODE (x) == PLUS) | |
1766 | { | |
1767 | rtx x1 = XEXP (x, 0); | |
1768 | rtx x2 = XEXP (x, 1); | |
1769 | ||
68cbb7e3 | 1770 | if (REG_P (x1)) |
1771 | { | |
d68ffc6f | 1772 | fprintf (stream, "%s,", reg_names[MMIX_OUTPUT_REGNO (REGNO (x1))]); |
68cbb7e3 | 1773 | |
1774 | if (REG_P (x2)) | |
1775 | { | |
d68ffc6f | 1776 | fprintf (stream, "%s", |
1777 | reg_names[MMIX_OUTPUT_REGNO (REGNO (x2))]); | |
68cbb7e3 | 1778 | return; |
1779 | } | |
f105c84e | 1780 | else if (satisfies_constraint_I (x2)) |
68cbb7e3 | 1781 | { |
1782 | output_addr_const (stream, x2); | |
1783 | return; | |
1784 | } | |
1785 | } | |
1786 | } | |
1787 | ||
ca316360 | 1788 | if (TARGET_BASE_ADDRESSES && mmix_legitimate_constant_p (Pmode, x)) |
f0b228a5 | 1789 | { |
1790 | output_addr_const (stream, x); | |
1791 | return; | |
1792 | } | |
1793 | ||
68cbb7e3 | 1794 | fatal_insn ("MMIX Internal: This is not a recognized address", x); |
1795 | } | |
1796 | ||
1797 | /* ASM_OUTPUT_REG_PUSH. */ | |
1798 | ||
1799 | void | |
7585fcd5 | 1800 | mmix_asm_output_reg_push (FILE *stream, int regno) |
68cbb7e3 | 1801 | { |
1802 | fprintf (stream, "\tSUBU %s,%s,8\n\tSTOU %s,%s,0\n", | |
1803 | reg_names[MMIX_STACK_POINTER_REGNUM], | |
1804 | reg_names[MMIX_STACK_POINTER_REGNUM], | |
d68ffc6f | 1805 | reg_names[MMIX_OUTPUT_REGNO (regno)], |
68cbb7e3 | 1806 | reg_names[MMIX_STACK_POINTER_REGNUM]); |
1807 | } | |
1808 | ||
1809 | /* ASM_OUTPUT_REG_POP. */ | |
1810 | ||
1811 | void | |
7585fcd5 | 1812 | mmix_asm_output_reg_pop (FILE *stream, int regno) |
68cbb7e3 | 1813 | { |
1814 | fprintf (stream, "\tLDOU %s,%s,0\n\tINCL %s,8\n", | |
d68ffc6f | 1815 | reg_names[MMIX_OUTPUT_REGNO (regno)], |
68cbb7e3 | 1816 | reg_names[MMIX_STACK_POINTER_REGNUM], |
1817 | reg_names[MMIX_STACK_POINTER_REGNUM]); | |
1818 | } | |
1819 | ||
1820 | /* ASM_OUTPUT_ADDR_DIFF_ELT. */ | |
1821 | ||
1822 | void | |
7585fcd5 | 1823 | mmix_asm_output_addr_diff_elt (FILE *stream, |
1824 | rtx body ATTRIBUTE_UNUSED, | |
1825 | int value, | |
1826 | int rel) | |
68cbb7e3 | 1827 | { |
1828 | fprintf (stream, "\tTETRA L%d-L%d\n", value, rel); | |
1829 | } | |
1830 | ||
1831 | /* ASM_OUTPUT_ADDR_VEC_ELT. */ | |
1832 | ||
1833 | void | |
7585fcd5 | 1834 | mmix_asm_output_addr_vec_elt (FILE *stream, int value) |
68cbb7e3 | 1835 | { |
1836 | fprintf (stream, "\tOCTA L:%d\n", value); | |
1837 | } | |
1838 | ||
1839 | /* ASM_OUTPUT_SKIP. */ | |
1840 | ||
1841 | void | |
7585fcd5 | 1842 | mmix_asm_output_skip (FILE *stream, int nbytes) |
68cbb7e3 | 1843 | { |
1844 | fprintf (stream, "\tLOC @+%d\n", nbytes); | |
1845 | } | |
1846 | ||
1847 | /* ASM_OUTPUT_ALIGN. */ | |
1848 | ||
1849 | void | |
7585fcd5 | 1850 | mmix_asm_output_align (FILE *stream, int power) |
68cbb7e3 | 1851 | { |
1852 | /* We need to record the needed alignment of this section in the object, | |
1853 | so we have to output an alignment directive. Use a .p2align (not | |
1854 | .align) so people will never have to wonder about whether the | |
1855 | argument is in number of bytes or the log2 thereof. We do it in | |
1856 | addition to the LOC directive, so nothing needs tweaking when | |
1857 | copy-pasting assembly into mmixal. */ | |
1858 | fprintf (stream, "\t.p2align %d\n", power); | |
1859 | fprintf (stream, "\tLOC @+(%d-@)&%d\n", 1 << power, (1 << power) - 1); | |
1860 | } | |
1861 | ||
1862 | /* DBX_REGISTER_NUMBER. */ | |
1863 | ||
c0dae7df | 1864 | unsigned |
1865 | mmix_dbx_register_number (unsigned regno) | |
68cbb7e3 | 1866 | { |
d68ffc6f | 1867 | /* Adjust the register number to the one it will be output as, dammit. |
1868 | It'd be nice if we could check the assumption that we're filling a | |
1869 | gap, but every register between the last saved register and parameter | |
1870 | registers might be a valid parameter register. */ | |
1871 | regno = MMIX_OUTPUT_REGNO (regno); | |
68cbb7e3 | 1872 | |
1873 | /* We need to renumber registers to get the number of the return address | |
1874 | register in the range 0..255. It is also space-saving if registers | |
1875 | mentioned in the call-frame information (which uses this function by | |
1876 | defaulting DWARF_FRAME_REGNUM to DBX_REGISTER_NUMBER) are numbered | |
1877 | 0 .. 63. So map 224 .. 256+15 -> 0 .. 47 and 0 .. 223 -> 48..223+48. */ | |
1878 | return regno >= 224 ? (regno - 224) : (regno + 48); | |
1879 | } | |
1880 | ||
35a3065a | 1881 | /* End of target macro support functions. |
68cbb7e3 | 1882 | |
7585fcd5 | 1883 | Now the MMIX port's own functions. First the exported ones. */ |
68cbb7e3 | 1884 | |
d3310704 | 1885 | /* Wrapper for get_hard_reg_initial_val since integrate.h isn't included |
1886 | from insn-emit.c. */ | |
1887 | ||
1888 | rtx | |
7585fcd5 | 1889 | mmix_get_hard_reg_initial_val (enum machine_mode mode, int regno) |
d3310704 | 1890 | { |
1891 | return get_hard_reg_initial_val (mode, regno); | |
1892 | } | |
1893 | ||
e911aedf | 1894 | /* Nonzero when the function epilogue is simple enough that a single |
d3310704 | 1895 | "POP %d,0" should be used even within the function. */ |
0b123c47 | 1896 | |
1897 | int | |
7585fcd5 | 1898 | mmix_use_simple_return (void) |
0b123c47 | 1899 | { |
1900 | int regno; | |
1901 | ||
1902 | int stack_space_to_allocate | |
abe32cce | 1903 | = (crtl->outgoing_args_size |
1904 | + crtl->args.pretend_args_size | |
0b123c47 | 1905 | + get_frame_size () + 7) & ~7; |
1906 | ||
1907 | if (!TARGET_USE_RETURN_INSN || !reload_completed) | |
1908 | return 0; | |
1909 | ||
1910 | for (regno = 255; | |
1911 | regno >= MMIX_FIRST_GLOBAL_REGNUM; | |
1912 | regno--) | |
1913 | /* Note that we assume that the frame-pointer-register is one of these | |
1914 | registers, in which case we don't count it here. */ | |
1915 | if ((((regno != MMIX_FRAME_POINTER_REGNUM || !frame_pointer_needed) | |
3072d30e | 1916 | && df_regs_ever_live_p (regno) && !call_used_regs[regno])) |
0b123c47 | 1917 | || IS_MMIX_EH_RETURN_DATA_REG (regno)) |
1918 | return 0; | |
1919 | ||
1920 | if (frame_pointer_needed) | |
1921 | stack_space_to_allocate += 8; | |
1922 | ||
1923 | if (MMIX_CFUN_HAS_LANDING_PAD) | |
1924 | stack_space_to_allocate += 16; | |
1925 | else if (MMIX_CFUN_NEEDS_SAVED_EH_RETURN_ADDRESS) | |
1926 | stack_space_to_allocate += 8; | |
1927 | ||
1928 | return stack_space_to_allocate == 0; | |
1929 | } | |
1930 | ||
d3310704 | 1931 | |
1932 | /* Expands the function prologue into RTX. */ | |
1933 | ||
1934 | void | |
7585fcd5 | 1935 | mmix_expand_prologue (void) |
d3310704 | 1936 | { |
1937 | HOST_WIDE_INT locals_size = get_frame_size (); | |
1938 | int regno; | |
1939 | HOST_WIDE_INT stack_space_to_allocate | |
abe32cce | 1940 | = (crtl->outgoing_args_size |
1941 | + crtl->args.pretend_args_size | |
d3310704 | 1942 | + locals_size + 7) & ~7; |
1943 | HOST_WIDE_INT offset = -8; | |
1944 | ||
1945 | /* Add room needed to save global non-register-stack registers. */ | |
1946 | for (regno = 255; | |
1947 | regno >= MMIX_FIRST_GLOBAL_REGNUM; | |
1948 | regno--) | |
1949 | /* Note that we assume that the frame-pointer-register is one of these | |
1950 | registers, in which case we don't count it here. */ | |
1951 | if ((((regno != MMIX_FRAME_POINTER_REGNUM || !frame_pointer_needed) | |
3072d30e | 1952 | && df_regs_ever_live_p (regno) && !call_used_regs[regno])) |
d3310704 | 1953 | || IS_MMIX_EH_RETURN_DATA_REG (regno)) |
1954 | stack_space_to_allocate += 8; | |
1955 | ||
1956 | /* If we do have a frame-pointer, add room for it. */ | |
1957 | if (frame_pointer_needed) | |
1958 | stack_space_to_allocate += 8; | |
1959 | ||
1960 | /* If we have a non-local label, we need to be able to unwind to it, so | |
1961 | store the current register stack pointer. Also store the return | |
1962 | address if we do that. */ | |
1963 | if (MMIX_CFUN_HAS_LANDING_PAD) | |
1964 | stack_space_to_allocate += 16; | |
1965 | else if (MMIX_CFUN_NEEDS_SAVED_EH_RETURN_ADDRESS) | |
1966 | /* If we do have a saved return-address slot, add room for it. */ | |
1967 | stack_space_to_allocate += 8; | |
1968 | ||
1969 | /* Make sure we don't get an unaligned stack. */ | |
1970 | if ((stack_space_to_allocate % 8) != 0) | |
7781aa77 | 1971 | internal_error ("stack frame not a multiple of 8 bytes: %wd", |
d3310704 | 1972 | stack_space_to_allocate); |
1973 | ||
abe32cce | 1974 | if (crtl->args.pretend_args_size) |
d3310704 | 1975 | { |
1976 | int mmix_first_vararg_reg | |
1977 | = (MMIX_FIRST_INCOMING_ARG_REGNUM | |
1978 | + (MMIX_MAX_ARGS_IN_REGS | |
abe32cce | 1979 | - crtl->args.pretend_args_size / 8)); |
d3310704 | 1980 | |
1981 | for (regno | |
1982 | = MMIX_FIRST_INCOMING_ARG_REGNUM + MMIX_MAX_ARGS_IN_REGS - 1; | |
1983 | regno >= mmix_first_vararg_reg; | |
1984 | regno--) | |
1985 | { | |
1986 | if (offset < 0) | |
1987 | { | |
1988 | HOST_WIDE_INT stack_chunk | |
1989 | = stack_space_to_allocate > (256 - 8) | |
1990 | ? (256 - 8) : stack_space_to_allocate; | |
1991 | ||
1992 | mmix_emit_sp_add (-stack_chunk); | |
1993 | offset += stack_chunk; | |
1994 | stack_space_to_allocate -= stack_chunk; | |
1995 | } | |
1996 | ||
1997 | /* These registers aren't actually saved (as in "will be | |
1998 | restored"), so don't tell DWARF2 they're saved. */ | |
1999 | emit_move_insn (gen_rtx_MEM (DImode, | |
29c05e22 | 2000 | plus_constant (Pmode, stack_pointer_rtx, |
d3310704 | 2001 | offset)), |
2002 | gen_rtx_REG (DImode, regno)); | |
2003 | offset -= 8; | |
2004 | } | |
2005 | } | |
2006 | ||
2007 | /* Store the frame-pointer. */ | |
2008 | ||
2009 | if (frame_pointer_needed) | |
2010 | { | |
2011 | rtx insn; | |
2012 | ||
2013 | if (offset < 0) | |
2014 | { | |
2015 | /* Get 8 less than otherwise, since we need to reach offset + 8. */ | |
2016 | HOST_WIDE_INT stack_chunk | |
2017 | = stack_space_to_allocate > (256 - 8 - 8) | |
2018 | ? (256 - 8 - 8) : stack_space_to_allocate; | |
2019 | ||
2020 | mmix_emit_sp_add (-stack_chunk); | |
2021 | ||
2022 | offset += stack_chunk; | |
2023 | stack_space_to_allocate -= stack_chunk; | |
2024 | } | |
2025 | ||
2026 | insn = emit_move_insn (gen_rtx_MEM (DImode, | |
29c05e22 | 2027 | plus_constant (Pmode, |
2028 | stack_pointer_rtx, | |
d3310704 | 2029 | offset)), |
2030 | hard_frame_pointer_rtx); | |
2031 | RTX_FRAME_RELATED_P (insn) = 1; | |
2032 | insn = emit_insn (gen_adddi3 (hard_frame_pointer_rtx, | |
2033 | stack_pointer_rtx, | |
2034 | GEN_INT (offset + 8))); | |
2035 | RTX_FRAME_RELATED_P (insn) = 1; | |
2036 | offset -= 8; | |
2037 | } | |
2038 | ||
2039 | if (MMIX_CFUN_NEEDS_SAVED_EH_RETURN_ADDRESS) | |
2040 | { | |
2041 | rtx tmpreg, retreg; | |
2042 | rtx insn; | |
2043 | ||
2044 | /* Store the return-address, if one is needed on the stack. We | |
2045 | usually store it in a register when needed, but that doesn't work | |
2046 | with -fexceptions. */ | |
2047 | ||
2048 | if (offset < 0) | |
2049 | { | |
2050 | /* Get 8 less than otherwise, since we need to reach offset + 8. */ | |
2051 | HOST_WIDE_INT stack_chunk | |
2052 | = stack_space_to_allocate > (256 - 8 - 8) | |
2053 | ? (256 - 8 - 8) : stack_space_to_allocate; | |
2054 | ||
2055 | mmix_emit_sp_add (-stack_chunk); | |
2056 | ||
2057 | offset += stack_chunk; | |
2058 | stack_space_to_allocate -= stack_chunk; | |
2059 | } | |
2060 | ||
2061 | tmpreg = gen_rtx_REG (DImode, 255); | |
2062 | retreg = gen_rtx_REG (DImode, MMIX_rJ_REGNUM); | |
2063 | ||
2064 | /* Dwarf2 code is confused by the use of a temporary register for | |
2065 | storing the return address, so we have to express it as a note, | |
2066 | which we attach to the actual store insn. */ | |
2067 | emit_move_insn (tmpreg, retreg); | |
2068 | ||
2069 | insn = emit_move_insn (gen_rtx_MEM (DImode, | |
29c05e22 | 2070 | plus_constant (Pmode, |
2071 | stack_pointer_rtx, | |
d3310704 | 2072 | offset)), |
2073 | tmpreg); | |
2074 | RTX_FRAME_RELATED_P (insn) = 1; | |
c0dae7df | 2075 | add_reg_note (insn, REG_FRAME_RELATED_EXPR, |
2076 | gen_rtx_SET (VOIDmode, | |
2077 | gen_rtx_MEM (DImode, | |
29c05e22 | 2078 | plus_constant (Pmode, |
2079 | stack_pointer_rtx, | |
c0dae7df | 2080 | offset)), |
2081 | retreg)); | |
d3310704 | 2082 | |
2083 | offset -= 8; | |
2084 | } | |
2085 | else if (MMIX_CFUN_HAS_LANDING_PAD) | |
2086 | offset -= 8; | |
2087 | ||
2088 | if (MMIX_CFUN_HAS_LANDING_PAD) | |
2089 | { | |
2090 | /* Store the register defining the numbering of local registers, so | |
2091 | we know how long to unwind the register stack. */ | |
2092 | ||
2093 | if (offset < 0) | |
2094 | { | |
2095 | /* Get 8 less than otherwise, since we need to reach offset + 8. */ | |
2096 | HOST_WIDE_INT stack_chunk | |
2097 | = stack_space_to_allocate > (256 - 8 - 8) | |
2098 | ? (256 - 8 - 8) : stack_space_to_allocate; | |
2099 | ||
2100 | mmix_emit_sp_add (-stack_chunk); | |
2101 | ||
2102 | offset += stack_chunk; | |
2103 | stack_space_to_allocate -= stack_chunk; | |
2104 | } | |
2105 | ||
2106 | /* We don't tell dwarf2 about this one; we just have it to unwind | |
2107 | the register stack at landing pads. FIXME: It's a kludge because | |
2108 | we can't describe the effect of the PUSHJ and PUSHGO insns on the | |
2109 | register stack at the moment. Best thing would be to handle it | |
2110 | like stack-pointer offsets. Better: some hook into dwarf2out.c | |
2111 | to produce DW_CFA_expression:s that specify the increment of rO, | |
2112 | and unwind it at eh_return (preferred) or at the landing pad. | |
2113 | Then saves to $0..$G-1 could be specified through that register. */ | |
2114 | ||
2115 | emit_move_insn (gen_rtx_REG (DImode, 255), | |
2116 | gen_rtx_REG (DImode, | |
2117 | MMIX_rO_REGNUM)); | |
2118 | emit_move_insn (gen_rtx_MEM (DImode, | |
29c05e22 | 2119 | plus_constant (Pmode, stack_pointer_rtx, |
2120 | offset)), | |
d3310704 | 2121 | gen_rtx_REG (DImode, 255)); |
2122 | offset -= 8; | |
2123 | } | |
2124 | ||
2125 | /* After the return-address and the frame-pointer, we have the local | |
2126 | variables. They're the ones that may have an "unaligned" size. */ | |
2127 | offset -= (locals_size + 7) & ~7; | |
2128 | ||
2129 | /* Now store all registers that are global, i.e. not saved by the | |
2130 | register file machinery. | |
2131 | ||
2132 | It is assumed that the frame-pointer is one of these registers, so it | |
2133 | is explicitly excluded in the count. */ | |
2134 | ||
2135 | for (regno = 255; | |
2136 | regno >= MMIX_FIRST_GLOBAL_REGNUM; | |
2137 | regno--) | |
2138 | if (((regno != MMIX_FRAME_POINTER_REGNUM || !frame_pointer_needed) | |
3072d30e | 2139 | && df_regs_ever_live_p (regno) && ! call_used_regs[regno]) |
d3310704 | 2140 | || IS_MMIX_EH_RETURN_DATA_REG (regno)) |
2141 | { | |
2142 | rtx insn; | |
2143 | ||
2144 | if (offset < 0) | |
2145 | { | |
2146 | HOST_WIDE_INT stack_chunk | |
2147 | = (stack_space_to_allocate > (256 - offset - 8) | |
2148 | ? (256 - offset - 8) : stack_space_to_allocate); | |
2149 | ||
2150 | mmix_emit_sp_add (-stack_chunk); | |
2151 | offset += stack_chunk; | |
2152 | stack_space_to_allocate -= stack_chunk; | |
2153 | } | |
2154 | ||
2155 | insn = emit_move_insn (gen_rtx_MEM (DImode, | |
29c05e22 | 2156 | plus_constant (Pmode, |
2157 | stack_pointer_rtx, | |
d3310704 | 2158 | offset)), |
2159 | gen_rtx_REG (DImode, regno)); | |
2160 | RTX_FRAME_RELATED_P (insn) = 1; | |
2161 | offset -= 8; | |
2162 | } | |
2163 | ||
2164 | /* Finally, allocate room for outgoing args and local vars if room | |
2165 | wasn't allocated above. */ | |
2166 | if (stack_space_to_allocate) | |
2167 | mmix_emit_sp_add (-stack_space_to_allocate); | |
2168 | } | |
2169 | ||
2170 | /* Expands the function epilogue into RTX. */ | |
2171 | ||
2172 | void | |
7585fcd5 | 2173 | mmix_expand_epilogue (void) |
d3310704 | 2174 | { |
2175 | HOST_WIDE_INT locals_size = get_frame_size (); | |
2176 | int regno; | |
2177 | HOST_WIDE_INT stack_space_to_deallocate | |
abe32cce | 2178 | = (crtl->outgoing_args_size |
2179 | + crtl->args.pretend_args_size | |
d3310704 | 2180 | + locals_size + 7) & ~7; |
2181 | ||
d3310704 | 2182 | /* The first address to access is beyond the outgoing_args area. */ |
abe32cce | 2183 | HOST_WIDE_INT offset = crtl->outgoing_args_size; |
d3310704 | 2184 | |
2185 | /* Add the space for global non-register-stack registers. | |
2186 | It is assumed that the frame-pointer register can be one of these | |
2187 | registers, in which case it is excluded from the count when needed. */ | |
2188 | for (regno = 255; | |
2189 | regno >= MMIX_FIRST_GLOBAL_REGNUM; | |
2190 | regno--) | |
2191 | if (((regno != MMIX_FRAME_POINTER_REGNUM || !frame_pointer_needed) | |
3072d30e | 2192 | && df_regs_ever_live_p (regno) && !call_used_regs[regno]) |
d3310704 | 2193 | || IS_MMIX_EH_RETURN_DATA_REG (regno)) |
2194 | stack_space_to_deallocate += 8; | |
2195 | ||
2196 | /* Add in the space for register stack-pointer. If so, always add room | |
2197 | for the saved PC. */ | |
2198 | if (MMIX_CFUN_HAS_LANDING_PAD) | |
2199 | stack_space_to_deallocate += 16; | |
2200 | else if (MMIX_CFUN_NEEDS_SAVED_EH_RETURN_ADDRESS) | |
2201 | /* If we have a saved return-address slot, add it in. */ | |
2202 | stack_space_to_deallocate += 8; | |
2203 | ||
2204 | /* Add in the frame-pointer. */ | |
2205 | if (frame_pointer_needed) | |
2206 | stack_space_to_deallocate += 8; | |
2207 | ||
2208 | /* Make sure we don't get an unaligned stack. */ | |
2209 | if ((stack_space_to_deallocate % 8) != 0) | |
7781aa77 | 2210 | internal_error ("stack frame not a multiple of octabyte: %wd", |
d3310704 | 2211 | stack_space_to_deallocate); |
2212 | ||
2213 | /* We will add back small offsets to the stack pointer as we go. | |
2214 | First, we restore all registers that are global, i.e. not saved by | |
2215 | the register file machinery. */ | |
2216 | ||
2217 | for (regno = MMIX_FIRST_GLOBAL_REGNUM; | |
2218 | regno <= 255; | |
2219 | regno++) | |
2220 | if (((regno != MMIX_FRAME_POINTER_REGNUM || !frame_pointer_needed) | |
3072d30e | 2221 | && df_regs_ever_live_p (regno) && !call_used_regs[regno]) |
d3310704 | 2222 | || IS_MMIX_EH_RETURN_DATA_REG (regno)) |
2223 | { | |
2224 | if (offset > 255) | |
2225 | { | |
2226 | mmix_emit_sp_add (offset); | |
2227 | stack_space_to_deallocate -= offset; | |
2228 | offset = 0; | |
2229 | } | |
2230 | ||
2231 | emit_move_insn (gen_rtx_REG (DImode, regno), | |
2232 | gen_rtx_MEM (DImode, | |
29c05e22 | 2233 | plus_constant (Pmode, stack_pointer_rtx, |
d3310704 | 2234 | offset))); |
2235 | offset += 8; | |
2236 | } | |
2237 | ||
2238 | /* Here is where the local variables were. As in the prologue, they | |
2239 | might be of an unaligned size. */ | |
2240 | offset += (locals_size + 7) & ~7; | |
2241 | ||
d3310704 | 2242 | /* The saved register stack pointer is just below the frame-pointer |
2243 | register. We don't need to restore it "manually"; the POP | |
2244 | instruction does that. */ | |
2245 | if (MMIX_CFUN_HAS_LANDING_PAD) | |
2246 | offset += 16; | |
2247 | else if (MMIX_CFUN_NEEDS_SAVED_EH_RETURN_ADDRESS) | |
2248 | /* The return-address slot is just below the frame-pointer register. | |
2249 | We don't need to restore it because we don't really use it. */ | |
2250 | offset += 8; | |
2251 | ||
2252 | /* Get back the old frame-pointer-value. */ | |
2253 | if (frame_pointer_needed) | |
2254 | { | |
2255 | if (offset > 255) | |
2256 | { | |
2257 | mmix_emit_sp_add (offset); | |
2258 | ||
2259 | stack_space_to_deallocate -= offset; | |
2260 | offset = 0; | |
2261 | } | |
2262 | ||
2263 | emit_move_insn (hard_frame_pointer_rtx, | |
2264 | gen_rtx_MEM (DImode, | |
29c05e22 | 2265 | plus_constant (Pmode, stack_pointer_rtx, |
d3310704 | 2266 | offset))); |
2267 | offset += 8; | |
2268 | } | |
2269 | ||
2270 | /* We do not need to restore pretended incoming args, just add back | |
2271 | offset to sp. */ | |
2272 | if (stack_space_to_deallocate != 0) | |
2273 | mmix_emit_sp_add (stack_space_to_deallocate); | |
2274 | ||
18d50ae6 | 2275 | if (crtl->calls_eh_return) |
d3310704 | 2276 | /* Adjust the (normal) stack-pointer to that of the receiver. |
2277 | FIXME: It would be nice if we could also adjust the register stack | |
2278 | here, but we need to express it through DWARF 2 too. */ | |
2279 | emit_insn (gen_adddi3 (stack_pointer_rtx, stack_pointer_rtx, | |
2280 | gen_rtx_REG (DImode, | |
2281 | MMIX_EH_RETURN_STACKADJ_REGNUM))); | |
2282 | } | |
2283 | ||
68cbb7e3 | 2284 | /* Output an optimal sequence for setting a register to a specific |
2285 | constant. Used in an alternative for const_ints in movdi, and when | |
2286 | using large stack-frame offsets. | |
2287 | ||
2288 | Use do_begin_end to say if a line-starting TAB and newline before the | |
2289 | first insn and after the last insn is wanted. */ | |
2290 | ||
2291 | void | |
7585fcd5 | 2292 | mmix_output_register_setting (FILE *stream, |
2293 | int regno, | |
2294 | HOST_WIDEST_INT value, | |
2295 | int do_begin_end) | |
68cbb7e3 | 2296 | { |
2297 | if (do_begin_end) | |
2298 | fprintf (stream, "\t"); | |
2299 | ||
4d66cf01 | 2300 | if (insn_const_int_ok_for_constraint (value, CONSTRAINT_K)) |
2301 | fprintf (stream, "NEGU %s,0," HOST_WIDEST_INT_PRINT_DEC, reg_names[regno], -value); | |
2302 | else if (mmix_shiftable_wyde_value ((unsigned HOST_WIDEST_INT) value)) | |
68cbb7e3 | 2303 | { |
2304 | /* First, the one-insn cases. */ | |
2305 | mmix_output_shiftvalue_op_from_str (stream, "SET", | |
2306 | (unsigned HOST_WIDEST_INT) | |
2307 | value); | |
2308 | fprintf (stream, " %s,", reg_names[regno]); | |
2309 | mmix_output_shifted_value (stream, (unsigned HOST_WIDEST_INT) value); | |
2310 | } | |
2311 | else if (mmix_shiftable_wyde_value (-(unsigned HOST_WIDEST_INT) value)) | |
2312 | { | |
2313 | /* We do this to get a bit more legible assembly code. The next | |
2314 | alternative is mostly redundant with this. */ | |
2315 | ||
2316 | mmix_output_shiftvalue_op_from_str (stream, "SET", | |
2317 | -(unsigned HOST_WIDEST_INT) | |
2318 | value); | |
2319 | fprintf (stream, " %s,", reg_names[regno]); | |
2320 | mmix_output_shifted_value (stream, -(unsigned HOST_WIDEST_INT) value); | |
2321 | fprintf (stream, "\n\tNEGU %s,0,%s", reg_names[regno], | |
2322 | reg_names[regno]); | |
2323 | } | |
2324 | else if (mmix_shiftable_wyde_value (~(unsigned HOST_WIDEST_INT) value)) | |
2325 | { | |
2326 | /* Slightly more expensive, the two-insn cases. */ | |
2327 | ||
2328 | /* FIXME: We could of course also test if 0..255-N or ~(N | 1..255) | |
2329 | is shiftable, or any other one-insn transformation of the value. | |
2330 | FIXME: Check first if the value is "shiftable" by two loading | |
2331 | with two insns, since it makes more readable assembly code (if | |
2332 | anyone else cares). */ | |
2333 | ||
2334 | mmix_output_shiftvalue_op_from_str (stream, "SET", | |
2335 | ~(unsigned HOST_WIDEST_INT) | |
2336 | value); | |
2337 | fprintf (stream, " %s,", reg_names[regno]); | |
2338 | mmix_output_shifted_value (stream, ~(unsigned HOST_WIDEST_INT) value); | |
2339 | fprintf (stream, "\n\tNOR %s,%s,0", reg_names[regno], | |
2340 | reg_names[regno]); | |
2341 | } | |
2342 | else | |
2343 | { | |
2344 | /* The generic case. 2..4 insns. */ | |
25037517 | 2345 | static const char *const higher_parts[] = {"L", "ML", "MH", "H"}; |
68cbb7e3 | 2346 | const char *op = "SET"; |
2347 | const char *line_begin = ""; | |
f0b228a5 | 2348 | int insns = 0; |
68cbb7e3 | 2349 | int i; |
f0b228a5 | 2350 | HOST_WIDEST_INT tmpvalue = value; |
68cbb7e3 | 2351 | |
f0b228a5 | 2352 | /* Compute the number of insns needed to output this constant. */ |
2353 | for (i = 0; i < 4 && tmpvalue != 0; i++) | |
2354 | { | |
2355 | if (tmpvalue & 65535) | |
2356 | insns++; | |
2357 | tmpvalue >>= 16; | |
2358 | } | |
2359 | if (TARGET_BASE_ADDRESSES && insns == 3) | |
2360 | { | |
2361 | /* The number three is based on a static observation on | |
2362 | ghostscript-6.52. Two and four are excluded because there | |
2363 | are too many such constants, and each unique constant (maybe | |
2364 | offset by 1..255) were used few times compared to other uses, | |
2365 | e.g. addresses. | |
2366 | ||
2367 | We use base-plus-offset addressing to force it into a global | |
2368 | register; we just use a "LDA reg,VALUE", which will cause the | |
2369 | assembler and linker to DTRT (for constants as well as | |
2370 | addresses). */ | |
2371 | fprintf (stream, "LDA %s,", reg_names[regno]); | |
2372 | mmix_output_octa (stream, value, 0); | |
2373 | } | |
2374 | else | |
68cbb7e3 | 2375 | { |
f0b228a5 | 2376 | /* Output pertinent parts of the 4-wyde sequence. |
2377 | Still more to do if we want this to be optimal, but hey... | |
2378 | Note that the zero case has been handled above. */ | |
2379 | for (i = 0; i < 4 && value != 0; i++) | |
68cbb7e3 | 2380 | { |
f0b228a5 | 2381 | if (value & 65535) |
2382 | { | |
2383 | fprintf (stream, "%s%s%s %s,#%x", line_begin, op, | |
2384 | higher_parts[i], reg_names[regno], | |
2385 | (int) (value & 65535)); | |
2386 | /* The first one sets the rest of the bits to 0, the next | |
2387 | ones add set bits. */ | |
2388 | op = "INC"; | |
2389 | line_begin = "\n\t"; | |
2390 | } | |
68cbb7e3 | 2391 | |
f0b228a5 | 2392 | value >>= 16; |
2393 | } | |
68cbb7e3 | 2394 | } |
2395 | } | |
2396 | ||
2397 | if (do_begin_end) | |
2398 | fprintf (stream, "\n"); | |
2399 | } | |
2400 | ||
2401 | /* Return 1 if value is 0..65535*2**(16*N) for N=0..3. | |
2402 | else return 0. */ | |
2403 | ||
2404 | int | |
7585fcd5 | 2405 | mmix_shiftable_wyde_value (unsigned HOST_WIDEST_INT value) |
68cbb7e3 | 2406 | { |
2407 | /* Shift by 16 bits per group, stop when we've found two groups with | |
2408 | nonzero bits. */ | |
2409 | int i; | |
2410 | int has_candidate = 0; | |
2411 | ||
2412 | for (i = 0; i < 4; i++) | |
2413 | { | |
2414 | if (value & 65535) | |
2415 | { | |
2416 | if (has_candidate) | |
2417 | return 0; | |
2418 | else | |
2419 | has_candidate = 1; | |
2420 | } | |
2421 | ||
2422 | value >>= 16; | |
2423 | } | |
2424 | ||
2425 | return 1; | |
2426 | } | |
2427 | ||
74f4459c | 2428 | /* X and Y are two things to compare using CODE. Return the rtx for |
2429 | the cc-reg in the proper mode. */ | |
68cbb7e3 | 2430 | |
2431 | rtx | |
7585fcd5 | 2432 | mmix_gen_compare_reg (RTX_CODE code, rtx x, rtx y) |
68cbb7e3 | 2433 | { |
2434 | enum machine_mode ccmode = SELECT_CC_MODE (code, x, y); | |
74f4459c | 2435 | return gen_reg_rtx (ccmode); |
68cbb7e3 | 2436 | } |
2437 | ||
2438 | /* Local (static) helper functions. */ | |
2439 | ||
d3310704 | 2440 | static void |
7585fcd5 | 2441 | mmix_emit_sp_add (HOST_WIDE_INT offset) |
d3310704 | 2442 | { |
2443 | rtx insn; | |
2444 | ||
2445 | if (offset < 0) | |
2446 | { | |
2447 | /* Negative stack-pointer adjustments are allocations and appear in | |
2448 | the prologue only. We mark them as frame-related so unwind and | |
2449 | debug info is properly emitted for them. */ | |
2450 | if (offset > -255) | |
2451 | insn = emit_insn (gen_adddi3 (stack_pointer_rtx, | |
2452 | stack_pointer_rtx, | |
2453 | GEN_INT (offset))); | |
2454 | else | |
2455 | { | |
2456 | rtx tmpr = gen_rtx_REG (DImode, 255); | |
2457 | RTX_FRAME_RELATED_P (emit_move_insn (tmpr, GEN_INT (offset))) = 1; | |
2458 | insn = emit_insn (gen_adddi3 (stack_pointer_rtx, | |
2459 | stack_pointer_rtx, tmpr)); | |
2460 | } | |
2461 | RTX_FRAME_RELATED_P (insn) = 1; | |
2462 | } | |
2463 | else | |
2464 | { | |
2465 | /* Positive adjustments are in the epilogue only. Don't mark them | |
2466 | as "frame-related" for unwind info. */ | |
f105c84e | 2467 | if (insn_const_int_ok_for_constraint (offset, CONSTRAINT_L)) |
d3310704 | 2468 | emit_insn (gen_adddi3 (stack_pointer_rtx, |
2469 | stack_pointer_rtx, | |
2470 | GEN_INT (offset))); | |
2471 | else | |
2472 | { | |
2473 | rtx tmpr = gen_rtx_REG (DImode, 255); | |
2474 | emit_move_insn (tmpr, GEN_INT (offset)); | |
2475 | insn = emit_insn (gen_adddi3 (stack_pointer_rtx, | |
2476 | stack_pointer_rtx, tmpr)); | |
2477 | } | |
2478 | } | |
2479 | } | |
2480 | ||
68cbb7e3 | 2481 | /* Print operator suitable for doing something with a shiftable |
ebb11c7b | 2482 | wyde. The type of operator is passed as an asm output modifier. */ |
68cbb7e3 | 2483 | |
2484 | static void | |
7585fcd5 | 2485 | mmix_output_shiftvalue_op_from_str (FILE *stream, |
2486 | const char *mainop, | |
2487 | HOST_WIDEST_INT value) | |
68cbb7e3 | 2488 | { |
25037517 | 2489 | static const char *const op_part[] = {"L", "ML", "MH", "H"}; |
68cbb7e3 | 2490 | int i; |
2491 | ||
2492 | if (! mmix_shiftable_wyde_value (value)) | |
2493 | { | |
2494 | char s[sizeof ("0xffffffffffffffff")]; | |
2495 | sprintf (s, HOST_WIDEST_INT_PRINT_HEX, value); | |
2496 | internal_error ("MMIX Internal: %s is not a shiftable int", s); | |
2497 | } | |
2498 | ||
2499 | for (i = 0; i < 4; i++) | |
2500 | { | |
2501 | /* We know we're through when we find one-bits in the low | |
2502 | 16 bits. */ | |
2503 | if (value & 0xffff) | |
2504 | { | |
2505 | fprintf (stream, "%s%s", mainop, op_part[i]); | |
2506 | return; | |
2507 | } | |
2508 | value >>= 16; | |
2509 | } | |
2510 | ||
2511 | /* No bits set? Then it must have been zero. */ | |
2512 | fprintf (stream, "%sL", mainop); | |
2513 | } | |
2514 | ||
2515 | /* Print a 64-bit value, optionally prefixed by assembly pseudo. */ | |
2516 | ||
2517 | static void | |
7585fcd5 | 2518 | mmix_output_octa (FILE *stream, HOST_WIDEST_INT value, int do_begin_end) |
68cbb7e3 | 2519 | { |
68cbb7e3 | 2520 | if (do_begin_end) |
2521 | fprintf (stream, "\tOCTA "); | |
2522 | ||
68cbb7e3 | 2523 | /* Provide a few alternative output formats depending on the number, to |
2524 | improve legibility of assembler output. */ | |
2525 | if ((value < (HOST_WIDEST_INT) 0 && value > (HOST_WIDEST_INT) -10000) | |
2526 | || (value >= (HOST_WIDEST_INT) 0 && value <= (HOST_WIDEST_INT) 16384)) | |
2527 | fprintf (stream, "%d", (int) value); | |
2528 | else if (value > (HOST_WIDEST_INT) 0 | |
2529 | && value < ((HOST_WIDEST_INT) 1 << 31) * 2) | |
2530 | fprintf (stream, "#%x", (unsigned int) value); | |
6996b123 | 2531 | else if (sizeof (HOST_WIDE_INT) == sizeof (HOST_WIDEST_INT)) |
2532 | /* We need to avoid the not-so-universal "0x" prefix; we need the | |
2533 | pure hex-digits together with the mmixal "#" hex prefix. */ | |
2534 | fprintf (stream, "#" HOST_WIDE_INT_PRINT_HEX_PURE, | |
2535 | (HOST_WIDE_INT) value); | |
2536 | else /* Need to avoid the hex output; there's no ...WIDEST...HEX_PURE. */ | |
2537 | fprintf (stream, HOST_WIDEST_INT_PRINT_UNSIGNED, value); | |
68cbb7e3 | 2538 | |
2539 | if (do_begin_end) | |
2540 | fprintf (stream, "\n"); | |
2541 | } | |
2542 | ||
2543 | /* Print the presumed shiftable wyde argument shifted into place (to | |
2544 | be output with an operand). */ | |
2545 | ||
2546 | static void | |
7585fcd5 | 2547 | mmix_output_shifted_value (FILE *stream, HOST_WIDEST_INT value) |
68cbb7e3 | 2548 | { |
2549 | int i; | |
2550 | ||
2551 | if (! mmix_shiftable_wyde_value (value)) | |
2552 | { | |
2553 | char s[16+2+1]; | |
2554 | sprintf (s, HOST_WIDEST_INT_PRINT_HEX, value); | |
2555 | internal_error ("MMIX Internal: %s is not a shiftable int", s); | |
2556 | } | |
2557 | ||
2558 | for (i = 0; i < 4; i++) | |
68cbb7e3 | 2559 | { |
7585fcd5 | 2560 | /* We know we're through when we find one-bits in the low 16 bits. */ |
2561 | if (value & 0xffff) | |
2562 | { | |
2563 | fprintf (stream, "#%x", (int) (value & 0xffff)); | |
2564 | return; | |
2565 | } | |
68cbb7e3 | 2566 | |
2567 | value >>= 16; | |
2568 | } | |
2569 | ||
2570 | /* No bits set? Then it must have been zero. */ | |
2571 | fprintf (stream, "0"); | |
2572 | } | |
2573 | ||
2574 | /* Output an MMIX condition name corresponding to an operator | |
2575 | and operands: | |
2576 | (comparison_operator [(comparison_operator ...) (const_int 0)]) | |
2577 | which means we have to look at *two* operators. | |
2578 | ||
2579 | The argument "reversed" refers to reversal of the condition (not the | |
2580 | same as swapping the arguments). */ | |
2581 | ||
2582 | static void | |
7a7fb407 | 2583 | mmix_output_condition (FILE *stream, const_rtx x, int reversed) |
68cbb7e3 | 2584 | { |
2585 | struct cc_conv | |
2586 | { | |
2587 | RTX_CODE cc; | |
2588 | ||
2589 | /* The normal output cc-code. */ | |
2590 | const char *const normal; | |
2591 | ||
2592 | /* The reversed cc-code, or NULL if invalid. */ | |
2593 | const char *const reversed; | |
2594 | }; | |
2595 | ||
2596 | struct cc_type_conv | |
2597 | { | |
2598 | enum machine_mode cc_mode; | |
2599 | ||
21f1e711 | 2600 | /* Terminated with {UNKNOWN, NULL, NULL} */ |
68cbb7e3 | 2601 | const struct cc_conv *const convs; |
2602 | }; | |
2603 | ||
2604 | #undef CCEND | |
21f1e711 | 2605 | #define CCEND {UNKNOWN, NULL, NULL} |
68cbb7e3 | 2606 | |
2607 | static const struct cc_conv cc_fun_convs[] | |
2608 | = {{ORDERED, "Z", "P"}, | |
2609 | {UNORDERED, "P", "Z"}, | |
2610 | CCEND}; | |
2611 | static const struct cc_conv cc_fp_convs[] | |
2612 | = {{GT, "P", NULL}, | |
2613 | {LT, "N", NULL}, | |
2614 | CCEND}; | |
2615 | static const struct cc_conv cc_fpeq_convs[] | |
2616 | = {{NE, "Z", "P"}, | |
2617 | {EQ, "P", "Z"}, | |
2618 | CCEND}; | |
2619 | static const struct cc_conv cc_uns_convs[] | |
2620 | = {{GEU, "NN", "N"}, | |
2621 | {GTU, "P", "NP"}, | |
2622 | {LEU, "NP", "P"}, | |
2623 | {LTU, "N", "NN"}, | |
2624 | CCEND}; | |
2625 | static const struct cc_conv cc_signed_convs[] | |
2626 | = {{NE, "NZ", "Z"}, | |
2627 | {EQ, "Z", "NZ"}, | |
2628 | {GE, "NN", "N"}, | |
2629 | {GT, "P", "NP"}, | |
2630 | {LE, "NP", "P"}, | |
2631 | {LT, "N", "NN"}, | |
2632 | CCEND}; | |
2633 | static const struct cc_conv cc_di_convs[] | |
2634 | = {{NE, "NZ", "Z"}, | |
2635 | {EQ, "Z", "NZ"}, | |
2636 | {GE, "NN", "N"}, | |
2637 | {GT, "P", "NP"}, | |
2638 | {LE, "NP", "P"}, | |
2639 | {LT, "N", "NN"}, | |
2640 | {GTU, "NZ", "Z"}, | |
2641 | {LEU, "Z", "NZ"}, | |
2642 | CCEND}; | |
2643 | #undef CCEND | |
2644 | ||
2645 | static const struct cc_type_conv cc_convs[] | |
2646 | = {{CC_FUNmode, cc_fun_convs}, | |
2647 | {CC_FPmode, cc_fp_convs}, | |
2648 | {CC_FPEQmode, cc_fpeq_convs}, | |
2649 | {CC_UNSmode, cc_uns_convs}, | |
2650 | {CCmode, cc_signed_convs}, | |
2651 | {DImode, cc_di_convs}}; | |
2652 | ||
3585dac7 | 2653 | size_t i; |
68cbb7e3 | 2654 | int j; |
2655 | ||
2656 | enum machine_mode mode = GET_MODE (XEXP (x, 0)); | |
2657 | RTX_CODE cc = GET_CODE (x); | |
2658 | ||
3585dac7 | 2659 | for (i = 0; i < ARRAY_SIZE (cc_convs); i++) |
68cbb7e3 | 2660 | { |
2661 | if (mode == cc_convs[i].cc_mode) | |
2662 | { | |
21f1e711 | 2663 | for (j = 0; cc_convs[i].convs[j].cc != UNKNOWN; j++) |
68cbb7e3 | 2664 | if (cc == cc_convs[i].convs[j].cc) |
2665 | { | |
2666 | const char *mmix_cc | |
2667 | = (reversed ? cc_convs[i].convs[j].reversed | |
2668 | : cc_convs[i].convs[j].normal); | |
2669 | ||
2670 | if (mmix_cc == NULL) | |
2671 | fatal_insn ("MMIX Internal: Trying to output invalidly\ | |
2672 | reversed condition:", x); | |
2673 | ||
2674 | fprintf (stream, "%s", mmix_cc); | |
2675 | return; | |
2676 | } | |
2677 | ||
2678 | fatal_insn ("MMIX Internal: What's the CC of this?", x); | |
2679 | } | |
2680 | } | |
2681 | ||
2682 | fatal_insn ("MMIX Internal: What is the CC of this?", x); | |
2683 | } | |
2684 | ||
2685 | /* Return the bit-value for a const_int or const_double. */ | |
2686 | ||
f105c84e | 2687 | HOST_WIDEST_INT |
7a7fb407 | 2688 | mmix_intval (const_rtx x) |
68cbb7e3 | 2689 | { |
2690 | unsigned HOST_WIDEST_INT retval; | |
2691 | ||
2692 | if (GET_CODE (x) == CONST_INT) | |
2693 | return INTVAL (x); | |
2694 | ||
2695 | /* We make a little song and dance because converting to long long in | |
2696 | gcc-2.7.2 is broken. I still want people to be able to use it for | |
2697 | cross-compilation to MMIX. */ | |
2698 | if (GET_CODE (x) == CONST_DOUBLE && GET_MODE (x) == VOIDmode) | |
2699 | { | |
2700 | if (sizeof (HOST_WIDE_INT) < sizeof (HOST_WIDEST_INT)) | |
2701 | { | |
2702 | retval = (unsigned) CONST_DOUBLE_LOW (x) / 2; | |
2703 | retval *= 2; | |
2704 | retval |= CONST_DOUBLE_LOW (x) & 1; | |
2705 | ||
2706 | retval |= | |
2707 | (unsigned HOST_WIDEST_INT) CONST_DOUBLE_HIGH (x) | |
f5b2b469 | 2708 | << (HOST_BITS_PER_LONG)/2 << (HOST_BITS_PER_LONG)/2; |
68cbb7e3 | 2709 | } |
2710 | else | |
2711 | retval = CONST_DOUBLE_HIGH (x); | |
2712 | ||
2713 | return retval; | |
2714 | } | |
2715 | ||
2716 | if (GET_CODE (x) == CONST_DOUBLE) | |
2717 | { | |
2718 | REAL_VALUE_TYPE value; | |
2719 | ||
2720 | /* FIXME: This macro is not in the manual but should be. */ | |
2721 | REAL_VALUE_FROM_CONST_DOUBLE (value, x); | |
2722 | ||
2723 | if (GET_MODE (x) == DFmode) | |
2724 | { | |
2725 | long bits[2]; | |
dc8dc4ce | 2726 | |
68cbb7e3 | 2727 | REAL_VALUE_TO_TARGET_DOUBLE (value, bits); |
2728 | ||
ca2399d9 | 2729 | /* The double cast is necessary to avoid getting the long |
2730 | sign-extended to unsigned long long(!) when they're of | |
2731 | different size (usually 32-bit hosts). */ | |
2732 | return | |
2733 | ((unsigned HOST_WIDEST_INT) (unsigned long) bits[0] | |
2734 | << (unsigned HOST_WIDEST_INT) 32U) | |
2735 | | (unsigned HOST_WIDEST_INT) (unsigned long) bits[1]; | |
68cbb7e3 | 2736 | } |
2737 | else if (GET_MODE (x) == SFmode) | |
2738 | { | |
2739 | long bits; | |
2740 | REAL_VALUE_TO_TARGET_SINGLE (value, bits); | |
2741 | ||
2742 | return (unsigned long) bits; | |
2743 | } | |
2744 | } | |
2745 | ||
2746 | fatal_insn ("MMIX Internal: This is not a constant:", x); | |
2747 | } | |
2748 | ||
3b2411a8 | 2749 | /* Worker function for TARGET_PROMOTE_FUNCTION_MODE. */ |
2750 | ||
2751 | enum machine_mode | |
2752 | mmix_promote_function_mode (const_tree type ATTRIBUTE_UNUSED, | |
2753 | enum machine_mode mode, | |
2754 | int *punsignedp ATTRIBUTE_UNUSED, | |
2755 | const_tree fntype ATTRIBUTE_UNUSED, | |
2756 | int for_return) | |
2757 | { | |
2758 | /* Apparently not doing TRT if int < register-size. FIXME: Perhaps | |
2759 | FUNCTION_VALUE and LIBCALL_VALUE needs tweaking as some ports say. */ | |
c879dbcf | 2760 | if (for_return == 1) |
3b2411a8 | 2761 | return mode; |
2762 | ||
2763 | /* Promotion of modes currently generates slow code, extending before | |
2764 | operation, so we do it only for arguments. */ | |
2765 | if (GET_MODE_CLASS (mode) == MODE_INT | |
2766 | && GET_MODE_SIZE (mode) < 8) | |
2767 | return DImode; | |
2768 | else | |
2769 | return mode; | |
2770 | } | |
9e4a734a | 2771 | /* Worker function for TARGET_STRUCT_VALUE_RTX. */ |
2772 | ||
2773 | static rtx | |
2774 | mmix_struct_value_rtx (tree fntype ATTRIBUTE_UNUSED, | |
2775 | int incoming ATTRIBUTE_UNUSED) | |
2776 | { | |
2777 | return gen_rtx_REG (Pmode, MMIX_STRUCT_VALUE_REGNUM); | |
2778 | } | |
2779 | ||
5a1c68c3 | 2780 | /* Worker function for TARGET_FRAME_POINTER_REQUIRED. |
2781 | ||
2782 | FIXME: Is this requirement built-in? Anyway, we should try to get rid | |
2783 | of it; we can deduce the value. */ | |
2784 | ||
2785 | bool | |
2786 | mmix_frame_pointer_required (void) | |
2787 | { | |
2788 | return (cfun->has_nonlocal_label); | |
2789 | } | |
2790 | ||
68cbb7e3 | 2791 | /* |
2792 | * Local variables: | |
2793 | * eval: (c-set-style "gnu") | |
2794 | * indent-tabs-mode: t | |
2795 | * End: | |
2796 | */ |