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e4a25868 | 1 | /* Subroutines used for code generation on TI MSP430 processors. |
3aea1f79 | 2 | Copyright (C) 2012-2014 Free Software Foundation, Inc. |
e4a25868 | 3 | Contributed by Red Hat. |
4 | ||
5 | This file is part of GCC. | |
6 | ||
7 | GCC is free software; you can redistribute it and/or modify | |
8 | it under the terms of the GNU General Public License as published by | |
9 | the Free Software Foundation; either version 3, or (at your option) | |
10 | any later version. | |
11 | ||
12 | GCC is distributed in the hope that it will be useful, | |
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 | |
18 | along with GCC; see the file COPYING3. If not see | |
19 | <http://www.gnu.org/licenses/>. */ | |
20 | ||
21 | #include "config.h" | |
22 | #include "system.h" | |
23 | #include "coretypes.h" | |
24 | #include "tm.h" | |
25 | #include "tree.h" | |
9ed99284 | 26 | #include "stor-layout.h" |
27 | #include "calls.h" | |
e4a25868 | 28 | #include "rtl.h" |
29 | #include "regs.h" | |
30 | #include "hard-reg-set.h" | |
31 | #include "insn-config.h" | |
32 | #include "conditions.h" | |
33 | #include "output.h" | |
34 | #include "insn-attr.h" | |
35 | #include "flags.h" | |
a3020f2f | 36 | #include "hashtab.h" |
37 | #include "hash-set.h" | |
38 | #include "vec.h" | |
39 | #include "machmode.h" | |
40 | #include "input.h" | |
e4a25868 | 41 | #include "function.h" |
42 | #include "expr.h" | |
34517c64 | 43 | #include "insn-codes.h" |
e4a25868 | 44 | #include "optabs.h" |
45 | #include "libfuncs.h" | |
46 | #include "recog.h" | |
47 | #include "diagnostic-core.h" | |
48 | #include "toplev.h" | |
49 | #include "reload.h" | |
94ea8568 | 50 | #include "dominance.h" |
51 | #include "cfg.h" | |
52 | #include "cfgrtl.h" | |
53 | #include "cfganal.h" | |
54 | #include "lcm.h" | |
55 | #include "cfgbuild.h" | |
56 | #include "cfgcleanup.h" | |
57 | #include "predict.h" | |
58 | #include "basic-block.h" | |
e4a25868 | 59 | #include "df.h" |
60 | #include "ggc.h" | |
61 | #include "tm_p.h" | |
62 | #include "debug.h" | |
63 | #include "target.h" | |
64 | #include "target-def.h" | |
65 | #include "langhooks.h" | |
66 | #include "msp430-protos.h" | |
67 | #include "dumpfile.h" | |
68 | #include "opts.h" | |
f7715905 | 69 | #include "builtins.h" |
e4a25868 | 70 | \f |
71 | ||
72 | static void msp430_compute_frame_info (void); | |
73 | ||
74 | \f | |
75 | ||
6956ee35 | 76 | /* Run-time Target Specification. */ |
e4a25868 | 77 | |
6956ee35 | 78 | bool msp430x = true; |
e4a25868 | 79 | |
80 | struct GTY(()) machine_function | |
81 | { | |
82 | /* If set, the rest of the fields have been computed. */ | |
83 | int computed; | |
84 | /* Which registers need to be saved in the pro/epilogue. */ | |
85 | int need_to_save [FIRST_PSEUDO_REGISTER]; | |
86 | ||
87 | /* These fields describe the frame layout... */ | |
88 | /* arg pointer */ | |
89 | /* 2/4 bytes for saved PC */ | |
90 | int framesize_regs; | |
91 | /* frame pointer */ | |
92 | int framesize_locals; | |
93 | int framesize_outgoing; | |
94 | /* stack pointer */ | |
95 | int framesize; | |
96 | ||
97 | /* How much we adjust the stack when returning from an exception | |
98 | handler. */ | |
99 | rtx eh_stack_adjust; | |
100 | }; | |
101 | ||
102 | /* This is our init_machine_status, as set in | |
103 | msp_option_override. */ | |
104 | static struct machine_function * | |
105 | msp430_init_machine_status (void) | |
106 | { | |
107 | struct machine_function *m; | |
108 | ||
25a27413 | 109 | m = ggc_cleared_alloc<machine_function> (); |
e4a25868 | 110 | |
111 | return m; | |
112 | } | |
113 | ||
e4a25868 | 114 | #undef TARGET_OPTION_OVERRIDE |
115 | #define TARGET_OPTION_OVERRIDE msp430_option_override | |
116 | ||
6956ee35 | 117 | static const char * msp430_mcu_names [] = |
118 | { | |
119 | "msp430afe221", "msp430afe222", "msp430afe223", "msp430afe231", | |
120 | "msp430afe232", "msp430afe233", "msp430afe251", "msp430afe252", | |
121 | "msp430afe253", "msp430c091", "msp430c092", "msp430c111", | |
122 | "msp430c1111", "msp430c112", "msp430c1121", "msp430c1331", | |
123 | "msp430c1351", "msp430c311s", "msp430c312", "msp430c313", | |
124 | "msp430c314", "msp430c315", "msp430c323", "msp430c325", | |
125 | "msp430c336", "msp430c337", "msp430c412", "msp430c413", | |
126 | "msp430e112", "msp430e313", "msp430e315", "msp430e325", | |
127 | "msp430e337", "msp430f110", "msp430f1101", "msp430f1101a", | |
128 | "msp430f1111", "msp430f1111a", "msp430f112", "msp430f1121", | |
129 | "msp430f1121a", "msp430f1122", "msp430f1132", "msp430f122", | |
130 | "msp430f1222", "msp430f123", "msp430f1232", "msp430f133", | |
131 | "msp430f135", "msp430f147", "msp430f1471", "msp430f148", | |
132 | "msp430f1481", "msp430f149", "msp430f1491", "msp430f155", | |
133 | "msp430f156", "msp430f157", "msp430f1610", "msp430f1611", | |
134 | "msp430f1612", "msp430f167", "msp430f168", "msp430f169", | |
135 | "msp430f2001", "msp430f2002", "msp430f2003", "msp430f2011", | |
136 | "msp430f2012", "msp430f2013", "msp430f2101", "msp430f2111", | |
137 | "msp430f2112", "msp430f2121", "msp430f2122", "msp430f2131", | |
138 | "msp430f2132", "msp430f2232", "msp430f2234", "msp430f2252", | |
139 | "msp430f2254", "msp430f2272", "msp430f2274", "msp430f233", | |
140 | "msp430f2330", "msp430f235", "msp430f2350", "msp430f2370", | |
141 | "msp430f2410", "msp430f247", "msp430f2471", "msp430f248", | |
142 | "msp430f2481", "msp430f249", "msp430f2491", "msp430f412", | |
143 | "msp430f413", "msp430f4132", "msp430f415", "msp430f4152", | |
144 | "msp430f417", "msp430f423", "msp430f423a", "msp430f425", | |
145 | "msp430f4250", "msp430f425a", "msp430f4260", "msp430f427", | |
146 | "msp430f4270", "msp430f427a", "msp430f435", "msp430f4351", | |
147 | "msp430f436", "msp430f4361", "msp430f437", "msp430f4371", | |
148 | "msp430f438", "msp430f439", "msp430f447", "msp430f448", | |
149 | "msp430f4481", "msp430f449", "msp430f4491", "msp430f477", | |
150 | "msp430f478", "msp430f4783", "msp430f4784", "msp430f479", | |
151 | "msp430f4793", "msp430f4794", "msp430fe423", "msp430fe4232", | |
152 | "msp430fe423a", "msp430fe4242", "msp430fe425", "msp430fe4252", | |
153 | "msp430fe425a", "msp430fe427", "msp430fe4272", "msp430fe427a", | |
154 | "msp430fg4250", "msp430fg4260", "msp430fg4270", "msp430fg437", | |
155 | "msp430fg438", "msp430fg439", "msp430fg477", "msp430fg478", | |
156 | "msp430fg479", "msp430fw423", "msp430fw425", "msp430fw427", | |
157 | "msp430fw428", "msp430fw429", "msp430g2001", "msp430g2101", | |
158 | "msp430g2102", "msp430g2111", "msp430g2112", "msp430g2113", | |
159 | "msp430g2121", "msp430g2131", "msp430g2132", "msp430g2152", | |
160 | "msp430g2153", "msp430g2201", "msp430g2202", "msp430g2203", | |
161 | "msp430g2210", "msp430g2211", "msp430g2212", "msp430g2213", | |
162 | "msp430g2221", "msp430g2230", "msp430g2231", "msp430g2232", | |
163 | "msp430g2233", "msp430g2252", "msp430g2253", "msp430g2302", | |
164 | "msp430g2303", "msp430g2312", "msp430g2313", "msp430g2332", | |
165 | "msp430g2333", "msp430g2352", "msp430g2353", "msp430g2402", | |
166 | "msp430g2403", "msp430g2412", "msp430g2413", "msp430g2432", | |
167 | "msp430g2433", "msp430g2444", "msp430g2452", "msp430g2453", | |
168 | "msp430g2513", "msp430g2533", "msp430g2544", "msp430g2553", | |
169 | "msp430g2744", "msp430g2755", "msp430g2855", "msp430g2955", | |
170 | "msp430i2020", "msp430i2021", "msp430i2030", "msp430i2031", | |
171 | "msp430i2040", "msp430i2041", "msp430l092", "msp430p112", | |
172 | "msp430p313", "msp430p315", "msp430p315s", "msp430p325", | |
173 | "msp430p337", "msp430tch5e" | |
1b80b2b4 | 174 | }; |
8e246851 | 175 | |
176 | /* Generate a C preprocessor symbol based upon the MCU selected by the user. | |
177 | If a specific MCU has not been selected then return a generic symbol instead. */ | |
178 | ||
179 | const char * | |
180 | msp430_mcu_name (void) | |
181 | { | |
abe1609f | 182 | if (target_mcu) |
8e246851 | 183 | { |
184 | unsigned int i; | |
185 | static char mcu_name [64]; | |
186 | ||
abe1609f | 187 | snprintf (mcu_name, sizeof (mcu_name) - 1, "__%s__", target_mcu); |
8e246851 | 188 | for (i = strlen (mcu_name); i--;) |
189 | mcu_name[i] = TOUPPER (mcu_name[i]); | |
190 | return mcu_name; | |
191 | } | |
0a9aab6d | 192 | |
8e246851 | 193 | return msp430x ? "__MSP430XGENERIC__" : "__MSP430GENERIC__"; |
194 | } | |
195 | ||
e4a25868 | 196 | static void |
197 | msp430_option_override (void) | |
198 | { | |
199 | init_machine_status = msp430_init_machine_status; | |
200 | ||
1b80b2b4 | 201 | if (target_cpu) |
abe1609f | 202 | { |
c05cbf30 | 203 | if (strcasecmp (target_cpu, "msp430x") == 0) |
abe1609f | 204 | msp430x = true; |
c05cbf30 | 205 | else /* target_cpu == "msp430" - already handled by the front end. */ |
6956ee35 | 206 | msp430x = false; |
abe1609f | 207 | } |
c05cbf30 | 208 | /* Note - the front end has already ensured at most |
209 | one of target_cpu and target_mcu will be set. */ | |
210 | else if (target_mcu) | |
1b80b2b4 | 211 | { |
6956ee35 | 212 | int i; |
1b80b2b4 | 213 | |
6956ee35 | 214 | /* If we are given an MCU name, we assume that it supports 430X. |
215 | Then we check to see if it is one of the known MCUs that only | |
216 | supports 430. */ | |
217 | msp430x = true; | |
218 | ||
c05cbf30 | 219 | for (i = ARRAY_SIZE (msp430_mcu_names); i--;) |
220 | if (strcasecmp (msp430_mcu_names[i], target_mcu) == 0) | |
221 | { | |
222 | msp430x = false; | |
223 | break; | |
224 | } | |
6956ee35 | 225 | /* It is not an error if we do not match the MCU name. There are |
226 | hundreds of them. */ | |
1b80b2b4 | 227 | } |
e4a25868 | 228 | |
229 | if (TARGET_LARGE && !msp430x) | |
62b2ccbe | 230 | error ("-mlarge requires a 430X-compatible -mmcu="); |
e4a25868 | 231 | |
232 | if (flag_exceptions || flag_non_call_exceptions | |
233 | || flag_unwind_tables || flag_asynchronous_unwind_tables) | |
234 | flag_omit_frame_pointer = false; | |
235 | else | |
236 | flag_omit_frame_pointer = true; | |
237 | ||
238 | /* This is a hack to work around a problem with the newlib build | |
239 | mechanism. Newlib always appends CFLAGS to the end of the GCC | |
240 | command line and always sets -O2 in CFLAGS. Thus it is not | |
241 | possible to build newlib with -Os enabled. Until now... */ | |
242 | if (TARGET_OPT_SPACE && optimize < 3) | |
243 | optimize_size = 1; | |
244 | } | |
245 | ||
f6bba390 | 246 | #undef TARGET_SCALAR_MODE_SUPPORTED_P |
247 | #define TARGET_SCALAR_MODE_SUPPORTED_P msp430_scalar_mode_supported_p | |
248 | ||
249 | static bool | |
3754d046 | 250 | msp430_scalar_mode_supported_p (machine_mode m) |
f6bba390 | 251 | { |
252 | if (m == PSImode && msp430x) | |
253 | return true; | |
254 | #if 0 | |
255 | if (m == TImode) | |
256 | return true; | |
257 | #endif | |
258 | return default_scalar_mode_supported_p (m); | |
259 | } | |
260 | ||
e4a25868 | 261 | \f |
262 | ||
263 | /* Storage Layout */ | |
264 | ||
265 | #undef TARGET_MS_BITFIELD_LAYOUT_P | |
266 | #define TARGET_MS_BITFIELD_LAYOUT_P msp430_ms_bitfield_layout_p | |
267 | ||
268 | bool | |
269 | msp430_ms_bitfield_layout_p (const_tree record_type ATTRIBUTE_UNUSED) | |
270 | { | |
271 | return false; | |
272 | } | |
273 | ||
274 | \f | |
275 | ||
276 | /* Register Usage */ | |
277 | ||
278 | /* Implements HARD_REGNO_NREGS. MSP430X registers can hold a single | |
279 | PSImode value, but not an SImode value. */ | |
280 | int | |
281 | msp430_hard_regno_nregs (int regno ATTRIBUTE_UNUSED, | |
3754d046 | 282 | machine_mode mode) |
e4a25868 | 283 | { |
284 | if (mode == PSImode && msp430x) | |
285 | return 1; | |
286 | return ((GET_MODE_SIZE (mode) + UNITS_PER_WORD - 1) | |
287 | / UNITS_PER_WORD); | |
288 | } | |
289 | ||
f6bba390 | 290 | /* Implements HARD_REGNO_NREGS_HAS_PADDING. */ |
291 | int | |
292 | msp430_hard_regno_nregs_has_padding (int regno ATTRIBUTE_UNUSED, | |
3754d046 | 293 | machine_mode mode) |
f6bba390 | 294 | { |
295 | if (mode == PSImode && msp430x) | |
296 | return 1; | |
297 | return ((GET_MODE_SIZE (mode) + UNITS_PER_WORD - 1) | |
298 | / UNITS_PER_WORD); | |
299 | } | |
300 | ||
301 | /* Implements HARD_REGNO_NREGS_WITH_PADDING. */ | |
302 | int | |
303 | msp430_hard_regno_nregs_with_padding (int regno ATTRIBUTE_UNUSED, | |
3754d046 | 304 | machine_mode mode) |
f6bba390 | 305 | { |
306 | if (mode == PSImode) | |
307 | return 2; | |
308 | return msp430_hard_regno_nregs (regno, mode); | |
309 | } | |
310 | ||
e4a25868 | 311 | /* Implements HARD_REGNO_MODE_OK. */ |
312 | int | |
313 | msp430_hard_regno_mode_ok (int regno ATTRIBUTE_UNUSED, | |
3754d046 | 314 | machine_mode mode) |
e4a25868 | 315 | { |
316 | return regno <= (ARG_POINTER_REGNUM - msp430_hard_regno_nregs (regno, mode)); | |
317 | } | |
318 | ||
319 | /* Implements MODES_TIEABLE_P. */ | |
320 | bool | |
3754d046 | 321 | msp430_modes_tieable_p (machine_mode mode1, machine_mode mode2) |
e4a25868 | 322 | { |
323 | if ((mode1 == PSImode || mode2 == SImode) | |
324 | || (mode1 == SImode || mode2 == PSImode)) | |
325 | return false; | |
326 | ||
327 | return ((GET_MODE_CLASS (mode1) == MODE_FLOAT | |
328 | || GET_MODE_CLASS (mode1) == MODE_COMPLEX_FLOAT) | |
329 | == (GET_MODE_CLASS (mode2) == MODE_FLOAT | |
330 | || GET_MODE_CLASS (mode2) == MODE_COMPLEX_FLOAT)); | |
331 | } | |
332 | ||
333 | #undef TARGET_FRAME_POINTER_REQUIRED | |
334 | #define TARGET_FRAME_POINTER_REQUIRED msp430_frame_pointer_required | |
335 | ||
336 | static bool | |
337 | msp430_frame_pointer_required (void) | |
338 | { | |
339 | return false; | |
340 | } | |
341 | ||
342 | #undef TARGET_CAN_ELIMINATE | |
343 | #define TARGET_CAN_ELIMINATE msp430_can_eliminate | |
344 | ||
345 | static bool | |
346 | msp430_can_eliminate (const int from_reg ATTRIBUTE_UNUSED, | |
347 | const int to_reg ATTRIBUTE_UNUSED) | |
348 | { | |
349 | return true; | |
350 | } | |
351 | ||
352 | /* Implements INITIAL_ELIMINATION_OFFSET. */ | |
353 | int | |
62b2ccbe | 354 | msp430_initial_elimination_offset (int from, int to) |
e4a25868 | 355 | { |
62b2ccbe | 356 | int rv = 0; /* As if arg to arg. */ |
e4a25868 | 357 | |
358 | msp430_compute_frame_info (); | |
359 | ||
360 | switch (to) | |
361 | { | |
362 | case STACK_POINTER_REGNUM: | |
363 | rv += cfun->machine->framesize_outgoing; | |
364 | rv += cfun->machine->framesize_locals; | |
365 | /* Fall through. */ | |
366 | case FRAME_POINTER_REGNUM: | |
367 | rv += cfun->machine->framesize_regs; | |
368 | /* Allow for the saved return address. */ | |
369 | rv += (TARGET_LARGE ? 4 : 2); | |
370 | /* NB/ No need to allow for crtl->args.pretend_args_size. | |
371 | GCC does that for us. */ | |
372 | break; | |
373 | default: | |
374 | gcc_unreachable (); | |
375 | } | |
376 | ||
377 | switch (from) | |
378 | { | |
379 | case FRAME_POINTER_REGNUM: | |
380 | /* Allow for the fall through above. */ | |
381 | rv -= (TARGET_LARGE ? 4 : 2); | |
382 | rv -= cfun->machine->framesize_regs; | |
383 | case ARG_POINTER_REGNUM: | |
384 | break; | |
385 | default: | |
386 | gcc_unreachable (); | |
387 | } | |
388 | ||
389 | return rv; | |
390 | } | |
391 | \f | |
392 | /* Named Address Space support */ | |
393 | ||
394 | ||
395 | /* Return the appropriate mode for a named address pointer. */ | |
396 | #undef TARGET_ADDR_SPACE_POINTER_MODE | |
397 | #define TARGET_ADDR_SPACE_POINTER_MODE msp430_addr_space_pointer_mode | |
398 | #undef TARGET_ADDR_SPACE_ADDRESS_MODE | |
399 | #define TARGET_ADDR_SPACE_ADDRESS_MODE msp430_addr_space_pointer_mode | |
400 | ||
3754d046 | 401 | static machine_mode |
e4a25868 | 402 | msp430_addr_space_pointer_mode (addr_space_t addrspace) |
403 | { | |
404 | switch (addrspace) | |
405 | { | |
406 | default: | |
407 | case ADDR_SPACE_GENERIC: | |
408 | return Pmode; | |
409 | case ADDR_SPACE_NEAR: | |
410 | return HImode; | |
411 | case ADDR_SPACE_FAR: | |
412 | return PSImode; | |
413 | } | |
414 | } | |
415 | ||
416 | /* Function pointers are stored in unwind_word sized | |
417 | variables, so make sure that unwind_word is big enough. */ | |
418 | #undef TARGET_UNWIND_WORD_MODE | |
419 | #define TARGET_UNWIND_WORD_MODE msp430_unwind_word_mode | |
420 | ||
3754d046 | 421 | static machine_mode |
e4a25868 | 422 | msp430_unwind_word_mode (void) |
423 | { | |
f6bba390 | 424 | return TARGET_LARGE ? PSImode : HImode; |
e4a25868 | 425 | } |
426 | ||
427 | /* Determine if one named address space is a subset of another. */ | |
428 | #undef TARGET_ADDR_SPACE_SUBSET_P | |
429 | #define TARGET_ADDR_SPACE_SUBSET_P msp430_addr_space_subset_p | |
430 | static bool | |
431 | msp430_addr_space_subset_p (addr_space_t subset, addr_space_t superset) | |
432 | { | |
433 | if (subset == superset) | |
434 | return true; | |
435 | else | |
436 | return (subset != ADDR_SPACE_FAR && superset == ADDR_SPACE_FAR); | |
437 | } | |
438 | ||
439 | #undef TARGET_ADDR_SPACE_CONVERT | |
440 | #define TARGET_ADDR_SPACE_CONVERT msp430_addr_space_convert | |
441 | /* Convert from one address space to another. */ | |
442 | static rtx | |
443 | msp430_addr_space_convert (rtx op, tree from_type, tree to_type) | |
444 | { | |
445 | addr_space_t from_as = TYPE_ADDR_SPACE (TREE_TYPE (from_type)); | |
446 | addr_space_t to_as = TYPE_ADDR_SPACE (TREE_TYPE (to_type)); | |
447 | rtx result; | |
448 | ||
449 | if (to_as != ADDR_SPACE_FAR && from_as == ADDR_SPACE_FAR) | |
450 | { | |
451 | /* This is unpredictable, as we're truncating off usable address | |
452 | bits. */ | |
453 | ||
454 | if (CONSTANT_P (op)) | |
455 | return gen_rtx_CONST (HImode, op); | |
456 | ||
457 | result = gen_reg_rtx (HImode); | |
458 | emit_insn (gen_truncpsihi2 (result, op)); | |
459 | return result; | |
460 | } | |
461 | else if (to_as == ADDR_SPACE_FAR && from_as != ADDR_SPACE_FAR) | |
462 | { | |
463 | /* This always works. */ | |
464 | ||
465 | if (CONSTANT_P (op)) | |
466 | return gen_rtx_CONST (PSImode, op); | |
467 | ||
468 | result = gen_reg_rtx (PSImode); | |
469 | emit_insn (gen_zero_extendhipsi2 (result, op)); | |
470 | return result; | |
471 | } | |
472 | else | |
473 | gcc_unreachable (); | |
474 | } | |
475 | \f | |
476 | /* Stack Layout and Calling Conventions. */ | |
477 | ||
478 | /* For each function, we list the gcc version and the TI version on | |
479 | each line, where we're converting the function names. */ | |
480 | static char const * const special_convention_function_names [] = | |
481 | { | |
482 | "__muldi3", "__mspabi_mpyll", | |
483 | "__udivdi3", "__mspabi_divull", | |
484 | "__umoddi3", "__mspabi_remull", | |
485 | "__divdi3", "__mspabi_divlli", | |
486 | "__moddi3", "__mspabi_remlli", | |
487 | "__mspabi_srall", | |
488 | "__mspabi_srlll", | |
489 | "__mspabi_sllll", | |
490 | "__adddf3", "__mspabi_addd", | |
491 | "__subdf3", "__mspabi_subd", | |
492 | "__muldf3", "__mspabi_mpyd", | |
493 | "__divdf3", "__mspabi_divd", | |
494 | "__mspabi_cmpd", | |
495 | NULL | |
496 | }; | |
497 | ||
498 | /* TRUE if the function passed is a "speical" function. Special | |
499 | functions pass two DImode parameters in registers. */ | |
500 | static bool | |
501 | msp430_special_register_convention_p (const char *name) | |
502 | { | |
503 | int i; | |
504 | ||
505 | for (i = 0; special_convention_function_names [i]; i++) | |
506 | if (! strcmp (name, special_convention_function_names [i])) | |
507 | return true; | |
508 | ||
509 | return false; | |
510 | } | |
511 | ||
512 | #undef TARGET_FUNCTION_VALUE_REGNO_P | |
513 | #define TARGET_FUNCTION_VALUE_REGNO_P msp430_function_value_regno_p | |
514 | ||
515 | bool | |
516 | msp430_function_value_regno_p (unsigned int regno) | |
517 | { | |
518 | return regno == 12; | |
519 | } | |
520 | ||
521 | ||
522 | #undef TARGET_FUNCTION_VALUE | |
523 | #define TARGET_FUNCTION_VALUE msp430_function_value | |
524 | ||
525 | rtx | |
526 | msp430_function_value (const_tree ret_type, | |
527 | const_tree fn_decl_or_type ATTRIBUTE_UNUSED, | |
528 | bool outgoing ATTRIBUTE_UNUSED) | |
529 | { | |
530 | return gen_rtx_REG (TYPE_MODE (ret_type), 12); | |
531 | } | |
532 | ||
533 | #undef TARGET_LIBCALL_VALUE | |
534 | #define TARGET_LIBCALL_VALUE msp430_libcall_value | |
535 | ||
536 | rtx | |
3754d046 | 537 | msp430_libcall_value (machine_mode mode, const_rtx fun ATTRIBUTE_UNUSED) |
e4a25868 | 538 | { |
539 | return gen_rtx_REG (mode, 12); | |
540 | } | |
541 | ||
542 | /* Implements INIT_CUMULATIVE_ARGS. */ | |
543 | void | |
544 | msp430_init_cumulative_args (CUMULATIVE_ARGS *ca, | |
545 | tree fntype ATTRIBUTE_UNUSED, | |
546 | rtx libname ATTRIBUTE_UNUSED, | |
547 | tree fndecl ATTRIBUTE_UNUSED, | |
548 | int n_named_args ATTRIBUTE_UNUSED) | |
549 | { | |
550 | const char *fname; | |
551 | memset (ca, 0, sizeof(*ca)); | |
552 | ||
553 | ca->can_split = 1; | |
554 | ||
555 | if (fndecl) | |
556 | fname = IDENTIFIER_POINTER (DECL_NAME (fndecl)); | |
557 | else if (libname) | |
558 | fname = XSTR (libname, 0); | |
559 | else | |
560 | fname = NULL; | |
561 | ||
562 | if (fname && msp430_special_register_convention_p (fname)) | |
563 | ca->special_p = 1; | |
564 | } | |
565 | ||
566 | /* Helper function for argument passing; this function is the common | |
567 | code that determines where an argument will be passed. */ | |
568 | static void | |
569 | msp430_evaluate_arg (cumulative_args_t cap, | |
3754d046 | 570 | machine_mode mode, |
e4a25868 | 571 | const_tree type ATTRIBUTE_UNUSED, |
572 | bool named) | |
573 | { | |
574 | CUMULATIVE_ARGS *ca = get_cumulative_args (cap); | |
575 | int nregs = GET_MODE_SIZE (mode); | |
576 | int i; | |
577 | ||
578 | ca->reg_count = 0; | |
579 | ca->mem_count = 0; | |
580 | ||
581 | if (!named) | |
582 | return; | |
583 | ||
584 | if (mode == PSImode) | |
585 | nregs = 1; | |
586 | else | |
587 | nregs = (nregs + 1) / 2; | |
588 | ||
589 | if (ca->special_p) | |
590 | { | |
591 | /* Function is passed two DImode operands, in R8:R11 and | |
592 | R12:15. */ | |
593 | ca->start_reg = 8; | |
594 | ca->reg_count = 4; | |
595 | return; | |
596 | } | |
597 | ||
598 | switch (nregs) | |
599 | { | |
600 | case 1: | |
601 | for (i = 0; i < 4; i++) | |
602 | if (! ca->reg_used [i]) | |
603 | { | |
604 | ca->reg_count = 1; | |
605 | ca->start_reg = CA_FIRST_REG + i; | |
606 | return; | |
607 | } | |
608 | break; | |
609 | case 2: | |
610 | for (i = 0; i < 3; i++) | |
611 | if (! ca->reg_used [i] && ! ca->reg_used [i + 1]) | |
612 | { | |
613 | ca->reg_count = 2; | |
614 | ca->start_reg = CA_FIRST_REG + i; | |
615 | return; | |
616 | } | |
617 | if (! ca->reg_used [3] && ca->can_split) | |
618 | { | |
619 | ca->reg_count = 1; | |
620 | ca->mem_count = 2; | |
621 | ca->start_reg = CA_FIRST_REG + 3; | |
622 | return; | |
623 | } | |
624 | break; | |
625 | case 3: | |
626 | case 4: | |
627 | ca->can_split = 0; | |
628 | if (! ca->reg_used [0] | |
629 | && ! ca->reg_used [1] | |
630 | && ! ca->reg_used [2] | |
631 | && ! ca->reg_used [3]) | |
632 | { | |
633 | ca->reg_count = 4; | |
634 | ca->start_reg = CA_FIRST_REG; | |
635 | return; | |
636 | } | |
637 | break; | |
638 | } | |
639 | } | |
640 | ||
641 | #undef TARGET_PROMOTE_PROTOTYPES | |
642 | #define TARGET_PROMOTE_PROTOTYPES msp430_promote_prototypes | |
643 | ||
644 | bool | |
645 | msp430_promote_prototypes (const_tree fntype ATTRIBUTE_UNUSED) | |
646 | { | |
647 | return false; | |
648 | } | |
649 | ||
650 | #undef TARGET_FUNCTION_ARG | |
651 | #define TARGET_FUNCTION_ARG msp430_function_arg | |
652 | ||
653 | rtx | |
654 | msp430_function_arg (cumulative_args_t cap, | |
3754d046 | 655 | machine_mode mode, |
e4a25868 | 656 | const_tree type, |
657 | bool named) | |
658 | { | |
659 | CUMULATIVE_ARGS *ca = get_cumulative_args (cap); | |
660 | ||
661 | msp430_evaluate_arg (cap, mode, type, named); | |
662 | ||
663 | if (ca->reg_count) | |
664 | return gen_rtx_REG (mode, ca->start_reg); | |
665 | ||
666 | return 0; | |
667 | } | |
668 | ||
669 | #undef TARGET_ARG_PARTIAL_BYTES | |
670 | #define TARGET_ARG_PARTIAL_BYTES msp430_arg_partial_bytes | |
671 | ||
672 | int | |
673 | msp430_arg_partial_bytes (cumulative_args_t cap, | |
3754d046 | 674 | machine_mode mode, |
e4a25868 | 675 | tree type, |
676 | bool named) | |
677 | { | |
678 | CUMULATIVE_ARGS *ca = get_cumulative_args (cap); | |
679 | ||
680 | msp430_evaluate_arg (cap, mode, type, named); | |
681 | ||
682 | if (ca->reg_count && ca->mem_count) | |
683 | return ca->reg_count * UNITS_PER_WORD; | |
684 | ||
685 | return 0; | |
686 | } | |
687 | ||
688 | #undef TARGET_PASS_BY_REFERENCE | |
689 | #define TARGET_PASS_BY_REFERENCE msp430_pass_by_reference | |
690 | ||
691 | static bool | |
692 | msp430_pass_by_reference (cumulative_args_t cap ATTRIBUTE_UNUSED, | |
3754d046 | 693 | machine_mode mode, |
e4a25868 | 694 | const_tree type, |
695 | bool named ATTRIBUTE_UNUSED) | |
696 | { | |
697 | return (mode == BLKmode | |
698 | || (type && TREE_CODE (type) == RECORD_TYPE) | |
699 | || (type && TREE_CODE (type) == UNION_TYPE)); | |
700 | } | |
701 | ||
702 | #undef TARGET_CALLEE_COPIES | |
703 | #define TARGET_CALLEE_COPIES msp430_callee_copies | |
704 | ||
705 | static bool | |
706 | msp430_callee_copies (cumulative_args_t cap ATTRIBUTE_UNUSED, | |
3754d046 | 707 | machine_mode mode ATTRIBUTE_UNUSED, |
e4a25868 | 708 | const_tree type ATTRIBUTE_UNUSED, |
709 | bool named ATTRIBUTE_UNUSED) | |
710 | { | |
711 | return true; | |
712 | } | |
713 | ||
714 | #undef TARGET_FUNCTION_ARG_ADVANCE | |
715 | #define TARGET_FUNCTION_ARG_ADVANCE msp430_function_arg_advance | |
716 | ||
717 | void | |
718 | msp430_function_arg_advance (cumulative_args_t cap, | |
3754d046 | 719 | machine_mode mode, |
e4a25868 | 720 | const_tree type, |
721 | bool named) | |
722 | { | |
723 | CUMULATIVE_ARGS *ca = get_cumulative_args (cap); | |
724 | int i; | |
725 | ||
726 | msp430_evaluate_arg (cap, mode, type, named); | |
727 | ||
728 | if (ca->start_reg >= CA_FIRST_REG) | |
729 | for (i = 0; i < ca->reg_count; i ++) | |
730 | ca->reg_used [i + ca->start_reg - CA_FIRST_REG] = 1; | |
731 | ||
732 | ca->special_p = 0; | |
733 | } | |
734 | ||
735 | #undef TARGET_FUNCTION_ARG_BOUNDARY | |
736 | #define TARGET_FUNCTION_ARG_BOUNDARY msp430_function_arg_boundary | |
737 | ||
738 | static unsigned int | |
3754d046 | 739 | msp430_function_arg_boundary (machine_mode mode, const_tree type) |
e4a25868 | 740 | { |
741 | if (mode == BLKmode | |
742 | && int_size_in_bytes (type) > 1) | |
743 | return 16; | |
744 | if (GET_MODE_BITSIZE (mode) > 8) | |
745 | return 16; | |
746 | return 8; | |
747 | } | |
748 | ||
749 | #undef TARGET_RETURN_IN_MEMORY | |
750 | #define TARGET_RETURN_IN_MEMORY msp430_return_in_memory | |
751 | ||
752 | static bool | |
753 | msp430_return_in_memory (const_tree ret_type, const_tree fntype ATTRIBUTE_UNUSED) | |
754 | { | |
3754d046 | 755 | machine_mode mode = TYPE_MODE (ret_type); |
e4a25868 | 756 | |
757 | if (mode == BLKmode | |
758 | || (fntype && TREE_CODE (TREE_TYPE (fntype)) == RECORD_TYPE) | |
759 | || (fntype && TREE_CODE (TREE_TYPE (fntype)) == UNION_TYPE)) | |
760 | return true; | |
761 | ||
762 | if (GET_MODE_SIZE (mode) > 8) | |
763 | return true; | |
764 | ||
765 | return false; | |
766 | } | |
767 | ||
768 | #undef TARGET_GET_RAW_ARG_MODE | |
769 | #define TARGET_GET_RAW_ARG_MODE msp430_get_raw_arg_mode | |
770 | ||
3754d046 | 771 | static machine_mode |
e4a25868 | 772 | msp430_get_raw_arg_mode (int regno) |
773 | { | |
774 | return (regno == ARG_POINTER_REGNUM) ? VOIDmode : Pmode; | |
775 | } | |
776 | ||
777 | #undef TARGET_GET_RAW_RESULT_MODE | |
778 | #define TARGET_GET_RAW_RESULT_MODE msp430_get_raw_result_mode | |
779 | ||
3754d046 | 780 | static machine_mode |
e4a25868 | 781 | msp430_get_raw_result_mode (int regno ATTRIBUTE_UNUSED) |
782 | { | |
783 | return Pmode; | |
784 | } | |
58f45145 | 785 | |
786 | #undef TARGET_GIMPLIFY_VA_ARG_EXPR | |
787 | #define TARGET_GIMPLIFY_VA_ARG_EXPR msp430_gimplify_va_arg_expr | |
788 | ||
789 | #include "gimplify.h" | |
790 | #include "gimple-expr.h" | |
791 | ||
792 | static tree | |
793 | msp430_gimplify_va_arg_expr (tree valist, tree type, gimple_seq *pre_p, | |
794 | gimple_seq *post_p) | |
795 | { | |
796 | tree addr, t, type_size, rounded_size, valist_tmp; | |
797 | unsigned HOST_WIDE_INT align, boundary; | |
798 | bool indirect; | |
799 | ||
800 | indirect = pass_by_reference (NULL, TYPE_MODE (type), type, false); | |
801 | if (indirect) | |
802 | type = build_pointer_type (type); | |
803 | ||
804 | align = PARM_BOUNDARY / BITS_PER_UNIT; | |
805 | boundary = targetm.calls.function_arg_boundary (TYPE_MODE (type), type); | |
806 | ||
807 | /* When we align parameter on stack for caller, if the parameter | |
808 | alignment is beyond MAX_SUPPORTED_STACK_ALIGNMENT, it will be | |
809 | aligned at MAX_SUPPORTED_STACK_ALIGNMENT. We will match callee | |
810 | here with caller. */ | |
811 | if (boundary > MAX_SUPPORTED_STACK_ALIGNMENT) | |
812 | boundary = MAX_SUPPORTED_STACK_ALIGNMENT; | |
813 | ||
814 | boundary /= BITS_PER_UNIT; | |
815 | ||
816 | /* Hoist the valist value into a temporary for the moment. */ | |
817 | valist_tmp = get_initialized_tmp_var (valist, pre_p, NULL); | |
818 | ||
819 | /* va_list pointer is aligned to PARM_BOUNDARY. If argument actually | |
820 | requires greater alignment, we must perform dynamic alignment. */ | |
821 | if (boundary > align | |
822 | && !integer_zerop (TYPE_SIZE (type))) | |
823 | { | |
824 | /* FIXME: This is where this function diverts from targhooks.c: | |
825 | std_gimplify_va_arg_expr(). It works, but I do not know why... */ | |
826 | if (! POINTER_TYPE_P (type)) | |
827 | { | |
828 | t = build2 (MODIFY_EXPR, TREE_TYPE (valist), valist_tmp, | |
829 | fold_build_pointer_plus_hwi (valist_tmp, boundary - 1)); | |
830 | gimplify_and_add (t, pre_p); | |
831 | ||
832 | t = build2 (MODIFY_EXPR, TREE_TYPE (valist), valist_tmp, | |
833 | fold_build2 (BIT_AND_EXPR, TREE_TYPE (valist), | |
834 | valist_tmp, | |
835 | build_int_cst (TREE_TYPE (valist), -boundary))); | |
836 | gimplify_and_add (t, pre_p); | |
837 | } | |
838 | } | |
839 | else | |
840 | boundary = align; | |
841 | ||
842 | /* If the actual alignment is less than the alignment of the type, | |
843 | adjust the type accordingly so that we don't assume strict alignment | |
844 | when dereferencing the pointer. */ | |
845 | boundary *= BITS_PER_UNIT; | |
846 | if (boundary < TYPE_ALIGN (type)) | |
847 | { | |
848 | type = build_variant_type_copy (type); | |
849 | TYPE_ALIGN (type) = boundary; | |
850 | } | |
851 | ||
852 | /* Compute the rounded size of the type. */ | |
853 | type_size = size_in_bytes (type); | |
854 | rounded_size = round_up (type_size, align); | |
855 | ||
856 | /* Reduce rounded_size so it's sharable with the postqueue. */ | |
857 | gimplify_expr (&rounded_size, pre_p, post_p, is_gimple_val, fb_rvalue); | |
858 | ||
859 | /* Get AP. */ | |
860 | addr = valist_tmp; | |
861 | ||
862 | /* Compute new value for AP. */ | |
863 | t = fold_build_pointer_plus (valist_tmp, rounded_size); | |
864 | t = build2 (MODIFY_EXPR, TREE_TYPE (valist), valist, t); | |
865 | gimplify_and_add (t, pre_p); | |
866 | ||
867 | addr = fold_convert (build_pointer_type (type), addr); | |
868 | ||
869 | if (indirect) | |
870 | addr = build_va_arg_indirect_ref (addr); | |
871 | ||
872 | addr = build_va_arg_indirect_ref (addr); | |
873 | ||
874 | return addr; | |
875 | } | |
e4a25868 | 876 | \f |
877 | /* Addressing Modes */ | |
878 | ||
879 | #undef TARGET_LEGITIMATE_ADDRESS_P | |
880 | #define TARGET_LEGITIMATE_ADDRESS_P msp430_legitimate_address_p | |
881 | ||
882 | static bool | |
883 | reg_ok_for_addr (rtx r, bool strict) | |
884 | { | |
885 | int rn = REGNO (r); | |
886 | ||
887 | if (strict && rn >= FIRST_PSEUDO_REGISTER) | |
888 | rn = reg_renumber [rn]; | |
889 | if (strict && 0 <= rn && rn < FIRST_PSEUDO_REGISTER) | |
890 | return true; | |
891 | if (!strict) | |
892 | return true; | |
893 | return false; | |
894 | } | |
895 | ||
896 | bool | |
3754d046 | 897 | msp430_legitimate_address_p (machine_mode mode ATTRIBUTE_UNUSED, |
e4a25868 | 898 | rtx x ATTRIBUTE_UNUSED, |
899 | bool strict ATTRIBUTE_UNUSED) | |
900 | { | |
901 | switch (GET_CODE (x)) | |
902 | { | |
903 | case MEM: | |
904 | return false; | |
905 | ||
906 | case PLUS: | |
907 | if (REG_P (XEXP (x, 0))) | |
908 | { | |
909 | if (GET_MODE (x) != GET_MODE (XEXP (x, 0))) | |
910 | return false; | |
911 | if (!reg_ok_for_addr (XEXP (x, 0), strict)) | |
912 | return false; | |
913 | switch (GET_CODE (XEXP (x, 1))) | |
914 | { | |
915 | case CONST: | |
916 | case SYMBOL_REF: | |
917 | case CONST_INT: | |
918 | return true; | |
919 | default: | |
920 | return false; | |
921 | } | |
922 | } | |
923 | return false; | |
924 | ||
925 | case REG: | |
926 | if (!reg_ok_for_addr (x, strict)) | |
927 | return false; | |
928 | /* else... */ | |
929 | case CONST: | |
930 | case SYMBOL_REF: | |
931 | case CONST_INT: | |
932 | return true; | |
933 | ||
934 | default: | |
935 | return false; | |
936 | } | |
937 | } | |
938 | ||
f6bba390 | 939 | #undef TARGET_ADDR_SPACE_LEGITIMATE_ADDRESS_P |
940 | #define TARGET_ADDR_SPACE_LEGITIMATE_ADDRESS_P msp430_addr_space_legitimate_address_p | |
941 | ||
942 | bool | |
3754d046 | 943 | msp430_addr_space_legitimate_address_p (machine_mode mode, |
f6bba390 | 944 | rtx x, |
945 | bool strict, | |
946 | addr_space_t as ATTRIBUTE_UNUSED) | |
947 | { | |
948 | return msp430_legitimate_address_p (mode, x, strict); | |
949 | } | |
950 | ||
951 | #undef TARGET_ASM_INTEGER | |
952 | #define TARGET_ASM_INTEGER msp430_asm_integer | |
953 | static bool | |
954 | msp430_asm_integer (rtx x, unsigned int size, int aligned_p) | |
955 | { | |
956 | int c = GET_CODE (x); | |
957 | ||
958 | if (size == 3 && GET_MODE (x) == PSImode) | |
959 | size = 4; | |
960 | ||
961 | switch (size) | |
962 | { | |
963 | case 4: | |
964 | if (c == SYMBOL_REF || c == CONST || c == LABEL_REF || c == CONST_INT) | |
965 | { | |
966 | fprintf (asm_out_file, "\t.long\t"); | |
967 | output_addr_const (asm_out_file, x); | |
968 | fputc ('\n', asm_out_file); | |
969 | return true; | |
970 | } | |
971 | break; | |
972 | } | |
973 | return default_assemble_integer (x, size, aligned_p); | |
974 | } | |
975 | ||
976 | #undef TARGET_ASM_OUTPUT_ADDR_CONST_EXTRA | |
977 | #define TARGET_ASM_OUTPUT_ADDR_CONST_EXTRA msp430_asm_output_addr_const_extra | |
978 | static bool | |
979 | msp430_asm_output_addr_const_extra (FILE *file, rtx x) | |
980 | { | |
981 | debug_rtx(x); | |
982 | return false; | |
983 | } | |
984 | ||
e4a25868 | 985 | #undef TARGET_LEGITIMATE_CONSTANT_P |
986 | #define TARGET_LEGITIMATE_CONSTANT_P msp430_legitimate_constant | |
987 | ||
988 | static bool | |
3754d046 | 989 | msp430_legitimate_constant (machine_mode mode, rtx x) |
e4a25868 | 990 | { |
991 | return ! CONST_INT_P (x) | |
992 | || mode != PSImode | |
993 | /* GCC does not know the width of the PSImode, so make | |
994 | sure that it does not try to use a constant value that | |
995 | is out of range. */ | |
996 | || (INTVAL (x) < (1 << 20) && INTVAL (x) >= (-1 << 20)); | |
997 | } | |
998 | ||
999 | \f | |
1000 | #undef TARGET_RTX_COSTS | |
1001 | #define TARGET_RTX_COSTS msp430_rtx_costs | |
1002 | ||
1003 | static bool msp430_rtx_costs (rtx x ATTRIBUTE_UNUSED, | |
1004 | int code, | |
1005 | int outer_code ATTRIBUTE_UNUSED, | |
1006 | int opno ATTRIBUTE_UNUSED, | |
1007 | int * total, | |
1008 | bool speed ATTRIBUTE_UNUSED) | |
1009 | { | |
1010 | switch (code) | |
1011 | { | |
1012 | case SIGN_EXTEND: | |
1013 | if (GET_MODE (x) == SImode && outer_code == SET) | |
1014 | { | |
1015 | *total = COSTS_N_INSNS (4); | |
1016 | return true; | |
1017 | } | |
1018 | break; | |
1019 | case ASHIFT: | |
1020 | case ASHIFTRT: | |
1021 | case LSHIFTRT: | |
1022 | if (!msp430x) | |
1023 | { | |
1024 | *total = COSTS_N_INSNS (100); | |
1025 | return true; | |
1026 | } | |
1027 | break; | |
1028 | } | |
1029 | return false; | |
1030 | } | |
1031 | \f | |
1032 | /* Function Entry and Exit */ | |
1033 | ||
1034 | /* The MSP430 call frame looks like this: | |
1035 | ||
1036 | <higher addresses> | |
1037 | +--------------------+ | |
1038 | | | | |
1039 | | Stack Arguments | | |
1040 | | | | |
1041 | +--------------------+ <-- "arg pointer" | |
1042 | | | | |
1043 | | PC from call | (2 bytes for 430, 4 for TARGET_LARGE) | |
1044 | | | | |
62b2ccbe | 1045 | +--------------------+ |
1046 | | SR if this func has| | |
1047 | | been called via an | | |
1048 | | interrupt. | | |
e4a25868 | 1049 | +--------------------+ <-- SP before prologue, also AP |
1050 | | | | |
1051 | | Saved Regs | (2 bytes per reg for 430, 4 per for TARGET_LARGE) | |
1052 | | | | |
1053 | +--------------------+ <-- "frame pointer" | |
1054 | | | | |
1055 | | Locals | | |
1056 | | | | |
1057 | +--------------------+ | |
1058 | | | | |
1059 | | Outgoing Args | | |
1060 | | | | |
1061 | +--------------------+ <-- SP during function | |
1062 | <lower addresses> | |
1063 | ||
1064 | */ | |
1065 | ||
1066 | /* We use this to wrap all emitted insns in the prologue, so they get | |
1067 | the "frame-related" (/f) flag set. */ | |
1068 | static rtx | |
1069 | F (rtx x) | |
1070 | { | |
1071 | RTX_FRAME_RELATED_P (x) = 1; | |
1072 | return x; | |
1073 | } | |
1074 | ||
1075 | /* This is the one spot that decides if a register is to be saved and | |
1076 | restored in the prologue/epilogue. */ | |
1077 | static bool | |
1078 | msp430_preserve_reg_p (int regno) | |
1079 | { | |
1080 | /* PC, SP, SR, and the constant generator. */ | |
1081 | if (regno <= 3) | |
1082 | return false; | |
1083 | ||
1084 | /* FIXME: add interrupt, EH, etc. */ | |
1085 | if (crtl->calls_eh_return) | |
1086 | return true; | |
1087 | ||
1088 | /* Shouldn't be more than the above, but just in case... */ | |
1089 | if (fixed_regs [regno]) | |
1090 | return false; | |
1091 | ||
62b2ccbe | 1092 | /* Interrupt handlers save all registers they use, even |
1093 | ones which are call saved. If they call other functions | |
1094 | then *every* register is saved. */ | |
1095 | if (msp430_is_interrupt_func ()) | |
1096 | return ! crtl->is_leaf || df_regs_ever_live_p (regno); | |
1097 | ||
e4a25868 | 1098 | if (!call_used_regs [regno] |
1099 | && df_regs_ever_live_p (regno)) | |
1100 | return true; | |
1101 | ||
1102 | return false; | |
1103 | } | |
1104 | ||
1105 | /* Compute all the frame-related fields in our machine_function | |
1106 | structure. */ | |
1107 | static void | |
1108 | msp430_compute_frame_info (void) | |
1109 | { | |
1110 | int i; | |
1111 | ||
1112 | cfun->machine->computed = 1; | |
1113 | cfun->machine->framesize_regs = 0; | |
1114 | cfun->machine->framesize_locals = get_frame_size (); | |
1115 | cfun->machine->framesize_outgoing = crtl->outgoing_args_size; | |
1116 | ||
62b2ccbe | 1117 | for (i = 0; i < ARG_POINTER_REGNUM; i ++) |
e4a25868 | 1118 | if (msp430_preserve_reg_p (i)) |
1119 | { | |
1120 | cfun->machine->need_to_save [i] = 1; | |
1121 | cfun->machine->framesize_regs += (TARGET_LARGE ? 4 : 2); | |
1122 | } | |
1123 | else | |
1124 | cfun->machine->need_to_save [i] = 0; | |
1125 | ||
1126 | if ((cfun->machine->framesize_locals + cfun->machine->framesize_outgoing) & 1) | |
1127 | cfun->machine->framesize_locals ++; | |
1128 | ||
1129 | cfun->machine->framesize = (cfun->machine->framesize_regs | |
1130 | + cfun->machine->framesize_locals | |
1131 | + cfun->machine->framesize_outgoing); | |
1132 | } | |
1133 | ||
62b2ccbe | 1134 | static inline bool |
1135 | is_attr_func (const char * attr) | |
1136 | { | |
1137 | return lookup_attribute (attr, DECL_ATTRIBUTES (current_function_decl)) != NULL_TREE; | |
1138 | } | |
1139 | ||
1140 | /* Returns true if the current function has the "interrupt" attribute. */ | |
1141 | ||
1142 | bool | |
1143 | msp430_is_interrupt_func (void) | |
1144 | { | |
6956ee35 | 1145 | if (current_function_decl == NULL) |
1146 | return false; | |
62b2ccbe | 1147 | return is_attr_func ("interrupt"); |
1148 | } | |
1149 | ||
0a9aab6d | 1150 | static bool |
1151 | is_wakeup_func (void) | |
1152 | { | |
1153 | return msp430_is_interrupt_func () && is_attr_func ("wakeup"); | |
1154 | } | |
1155 | ||
62b2ccbe | 1156 | static inline bool |
1157 | is_naked_func (void) | |
1158 | { | |
1159 | return is_attr_func ("naked"); | |
1160 | } | |
1161 | ||
1162 | static inline bool | |
1163 | is_reentrant_func (void) | |
1164 | { | |
1165 | return is_attr_func ("reentrant"); | |
1166 | } | |
1167 | ||
1168 | static inline bool | |
1169 | is_critical_func (void) | |
1170 | { | |
1171 | return is_attr_func ("critical"); | |
1172 | } | |
1173 | ||
e4a25868 | 1174 | #undef TARGET_ASM_FUNCTION_PROLOGUE |
1175 | #define TARGET_ASM_FUNCTION_PROLOGUE msp430_start_function | |
1176 | ||
1177 | static void | |
1178 | msp430_start_function (FILE *outfile, HOST_WIDE_INT hwi_local ATTRIBUTE_UNUSED) | |
1179 | { | |
1180 | int r, n; | |
1181 | ||
1182 | fprintf (outfile, "; start of function\n"); | |
62b2ccbe | 1183 | |
1184 | if (DECL_ATTRIBUTES (current_function_decl) != NULL_TREE) | |
1185 | { | |
1186 | fprintf (outfile, "; attributes: "); | |
1187 | if (is_naked_func ()) | |
1188 | fprintf (outfile, "naked "); | |
1189 | if (msp430_is_interrupt_func ()) | |
1190 | fprintf (outfile, "interrupt "); | |
1191 | if (is_reentrant_func ()) | |
1192 | fprintf (outfile, "reentrant "); | |
1193 | if (is_critical_func ()) | |
1194 | fprintf (outfile, "critical "); | |
0a9aab6d | 1195 | if (is_wakeup_func ()) |
1196 | fprintf (outfile, "wakeup "); | |
62b2ccbe | 1197 | fprintf (outfile, "\n"); |
1198 | } | |
1199 | ||
e4a25868 | 1200 | fprintf (outfile, "; framesize_regs: %d\n", cfun->machine->framesize_regs); |
1201 | fprintf (outfile, "; framesize_locals: %d\n", cfun->machine->framesize_locals); | |
1202 | fprintf (outfile, "; framesize_outgoing: %d\n", cfun->machine->framesize_outgoing); | |
1203 | fprintf (outfile, "; framesize: %d\n", cfun->machine->framesize); | |
1204 | fprintf (outfile, "; elim ap -> fp %d\n", msp430_initial_elimination_offset (ARG_POINTER_REGNUM, FRAME_POINTER_REGNUM)); | |
1205 | fprintf (outfile, "; elim fp -> sp %d\n", msp430_initial_elimination_offset (FRAME_POINTER_REGNUM, STACK_POINTER_REGNUM)); | |
1206 | ||
1207 | n = 0; | |
1208 | fprintf (outfile, "; saved regs:"); | |
62b2ccbe | 1209 | for (r = 0; r < ARG_POINTER_REGNUM; r++) |
e4a25868 | 1210 | if (cfun->machine->need_to_save [r]) |
1211 | { | |
1212 | fprintf (outfile, " %s", reg_names [r]); | |
1213 | n = 1; | |
1214 | } | |
1215 | if (n == 0) | |
1216 | fprintf (outfile, "(none)"); | |
1217 | fprintf (outfile, "\n"); | |
1218 | } | |
1219 | ||
1220 | /* Common code to change the stack pointer. */ | |
1221 | static void | |
1222 | increment_stack (HOST_WIDE_INT amount) | |
1223 | { | |
1224 | rtx inc; | |
1225 | rtx sp = stack_pointer_rtx; | |
1226 | ||
1227 | if (amount == 0) | |
1228 | return; | |
1229 | ||
1230 | if (amount < 0) | |
1231 | { | |
1232 | inc = GEN_INT (- amount); | |
1233 | if (TARGET_LARGE) | |
1234 | F (emit_insn (gen_subpsi3 (sp, sp, inc))); | |
1235 | else | |
1236 | F (emit_insn (gen_subhi3 (sp, sp, inc))); | |
1237 | } | |
1238 | else | |
1239 | { | |
1240 | inc = GEN_INT (amount); | |
1241 | if (TARGET_LARGE) | |
1242 | emit_insn (gen_addpsi3 (sp, sp, inc)); | |
1243 | else | |
1244 | emit_insn (gen_addhi3 (sp, sp, inc)); | |
1245 | } | |
1246 | } | |
1247 | ||
62b2ccbe | 1248 | /* Verify MSP430 specific attributes. */ |
1249 | ||
1250 | static tree | |
1251 | msp430_attr (tree * node, | |
1252 | tree name, | |
1253 | tree args, | |
1254 | int flags ATTRIBUTE_UNUSED, | |
1255 | bool * no_add_attrs) | |
1256 | { | |
1257 | gcc_assert (DECL_P (* node)); | |
1258 | ||
1259 | if (args != NULL) | |
1260 | { | |
1261 | tree value = TREE_VALUE (args); | |
1262 | ||
1263 | switch (TREE_CODE (value)) | |
1264 | { | |
1265 | case STRING_CST: | |
1266 | if ( strcmp (TREE_STRING_POINTER (value), "reset") | |
1267 | && strcmp (TREE_STRING_POINTER (value), "nmi") | |
1268 | && strcmp (TREE_STRING_POINTER (value), "watchdog")) | |
1269 | /* Allow the attribute to be added - the linker script | |
1270 | being used may still recognise this name. */ | |
1271 | warning (OPT_Wattributes, | |
1272 | "unrecognised interrupt vector argument of %qE attribute", | |
1273 | name); | |
1274 | break; | |
1275 | ||
1276 | case INTEGER_CST: | |
fe34354e | 1277 | if (wi::gtu_p (value, 63)) |
62b2ccbe | 1278 | /* Allow the attribute to be added - the linker script |
1279 | being used may still recognise this value. */ | |
1280 | warning (OPT_Wattributes, | |
abe1609f | 1281 | "numeric argument of %qE attribute must be in range 0..63", |
62b2ccbe | 1282 | name); |
1283 | break; | |
1284 | ||
1285 | default: | |
1286 | warning (OPT_Wattributes, | |
1287 | "argument of %qE attribute is not a string constant or number", | |
1288 | name); | |
1289 | *no_add_attrs = true; | |
1290 | break; | |
1291 | } | |
1292 | } | |
1293 | ||
1294 | if (TREE_CODE (* node) != FUNCTION_DECL) | |
1295 | { | |
1296 | warning (OPT_Wattributes, | |
1297 | "%qE attribute only applies to functions", | |
1298 | name); | |
1299 | * no_add_attrs = true; | |
1300 | } | |
1301 | ||
1302 | /* FIXME: We ought to check that the interrupt handler | |
1303 | attribute has been applied to a void function. */ | |
1304 | /* FIXME: We should check that reentrant and critical | |
1305 | functions are not naked and that critical functions | |
1306 | are not reentrant. */ | |
1307 | ||
1308 | return NULL_TREE; | |
1309 | } | |
1310 | ||
1311 | #undef TARGET_ATTRIBUTE_TABLE | |
1312 | #define TARGET_ATTRIBUTE_TABLE msp430_attribute_table | |
1313 | ||
1314 | /* Table of MSP430-specific attributes. */ | |
1315 | const struct attribute_spec msp430_attribute_table[] = | |
1316 | { | |
1317 | /* Name min_len decl_req, fn_type_req, affects_type_identity | |
1318 | max_len, type_req, handler. */ | |
1319 | { "interrupt", 0, 1, true, false, false, msp430_attr, false }, | |
1320 | { "naked", 0, 0, true, false, false, msp430_attr, false }, | |
1321 | { "reentrant", 0, 0, true, false, false, msp430_attr, false }, | |
1322 | { "critical", 0, 0, true, false, false, msp430_attr, false }, | |
0a9aab6d | 1323 | { "wakeup", 0, 0, true, false, false, msp430_attr, false }, |
62b2ccbe | 1324 | { NULL, 0, 0, false, false, false, NULL, false } |
1325 | }; | |
1326 | ||
1327 | void | |
1328 | msp430_start_function (FILE *file, const char *name, tree decl) | |
1329 | { | |
1330 | tree int_attr; | |
1331 | ||
1332 | int_attr = lookup_attribute ("interrupt", DECL_ATTRIBUTES (decl)); | |
1333 | if (int_attr != NULL_TREE) | |
1334 | { | |
1335 | tree intr_vector = TREE_VALUE (int_attr); | |
1336 | ||
1337 | if (intr_vector != NULL_TREE) | |
1338 | { | |
1339 | char buf[101]; | |
1340 | ||
1341 | intr_vector = TREE_VALUE (intr_vector); | |
1342 | ||
1343 | /* The interrupt attribute has a vector value. Turn this into a | |
1344 | section name, switch to that section and put the address of | |
1345 | the current function into that vector slot. Note msp430_attr() | |
1346 | has already verified the vector name for us. */ | |
1347 | if (TREE_CODE (intr_vector) == STRING_CST) | |
1348 | sprintf (buf, "__interrupt_vector_%.80s", | |
1349 | TREE_STRING_POINTER (intr_vector)); | |
1350 | else /* TREE_CODE (intr_vector) == INTEGER_CST */ | |
1351 | sprintf (buf, "__interrupt_vector_%u", | |
f9ae6f95 | 1352 | (unsigned int) TREE_INT_CST_LOW (intr_vector)); |
62b2ccbe | 1353 | |
1354 | switch_to_section (get_section (buf, SECTION_CODE, decl)); | |
1355 | fputs ("\t.word\t", file); | |
1356 | assemble_name (file, name); | |
1357 | fputc ('\n', file); | |
1358 | fputc ('\t', file); | |
1359 | } | |
1360 | } | |
1361 | ||
1362 | switch_to_section (function_section (decl)); | |
1363 | ASM_OUTPUT_FUNCTION_LABEL (file, name, decl); | |
1364 | } | |
1365 | ||
1366 | static section * | |
1367 | msp430_function_section (tree decl, enum node_frequency freq, bool startup, bool exit) | |
1368 | { | |
1369 | /* In large mode we must make sure that interrupt handlers are put into | |
1370 | low memory as the vector table only accepts 16-bit addresses. */ | |
1371 | if (TARGET_LARGE | |
1372 | && lookup_attribute ("interrupt", DECL_ATTRIBUTES (decl))) | |
1373 | return get_section (".lowtext", SECTION_CODE | SECTION_WRITE , decl); | |
1374 | ||
1375 | /* Otherwise, use the default function section. */ | |
1376 | return default_function_section (decl, freq, startup, exit); | |
1377 | } | |
1378 | ||
1379 | #undef TARGET_ASM_FUNCTION_SECTION | |
1380 | #define TARGET_ASM_FUNCTION_SECTION msp430_function_section | |
1381 | ||
1382 | enum msp430_builtin | |
1383 | { | |
1384 | MSP430_BUILTIN_BIC_SR, | |
1385 | MSP430_BUILTIN_BIS_SR, | |
9f70b545 | 1386 | MSP430_BUILTIN_DELAY_CYCLES, |
62b2ccbe | 1387 | MSP430_BUILTIN_max |
1388 | }; | |
1389 | ||
1390 | static GTY(()) tree msp430_builtins [(int) MSP430_BUILTIN_max]; | |
1391 | ||
1392 | static void | |
1393 | msp430_init_builtins (void) | |
1394 | { | |
1395 | tree void_ftype_int = build_function_type_list (void_type_node, integer_type_node, NULL); | |
9f70b545 | 1396 | tree void_ftype_longlong = build_function_type_list (void_type_node, long_long_integer_type_node, NULL); |
62b2ccbe | 1397 | |
1398 | msp430_builtins[MSP430_BUILTIN_BIC_SR] = | |
1399 | add_builtin_function ( "__bic_SR_register_on_exit", void_ftype_int, | |
1400 | MSP430_BUILTIN_BIC_SR, BUILT_IN_MD, NULL, NULL_TREE); | |
1401 | ||
1402 | msp430_builtins[MSP430_BUILTIN_BIS_SR] = | |
1403 | add_builtin_function ( "__bis_SR_register_on_exit", void_ftype_int, | |
1404 | MSP430_BUILTIN_BIS_SR, BUILT_IN_MD, NULL, NULL_TREE); | |
9f70b545 | 1405 | |
1406 | msp430_builtins[MSP430_BUILTIN_DELAY_CYCLES] = | |
1407 | add_builtin_function ( "__delay_cycles", void_ftype_longlong, | |
1408 | MSP430_BUILTIN_DELAY_CYCLES, BUILT_IN_MD, NULL, NULL_TREE); | |
62b2ccbe | 1409 | } |
1410 | ||
1411 | static tree | |
1412 | msp430_builtin_decl (unsigned code, bool initialize ATTRIBUTE_UNUSED) | |
1413 | { | |
1414 | switch (code) | |
1415 | { | |
1416 | case MSP430_BUILTIN_BIC_SR: | |
1417 | case MSP430_BUILTIN_BIS_SR: | |
9f70b545 | 1418 | case MSP430_BUILTIN_DELAY_CYCLES: |
62b2ccbe | 1419 | return msp430_builtins[code]; |
1420 | default: | |
1421 | return error_mark_node; | |
1422 | } | |
1423 | } | |
1424 | ||
9f70b545 | 1425 | /* These constants are really register reads, which are faster than |
1426 | regular constants. */ | |
1427 | static int | |
1428 | cg_magic_constant (HOST_WIDE_INT c) | |
1429 | { | |
1430 | switch (c) | |
1431 | { | |
1432 | case 0xffff: | |
1433 | case -1: | |
1434 | case 0: | |
1435 | case 1: | |
1436 | case 2: | |
1437 | case 4: | |
1438 | case 8: | |
1439 | return 1; | |
1440 | default: | |
1441 | return 0; | |
1442 | } | |
1443 | } | |
1444 | ||
1445 | static rtx | |
1446 | msp430_expand_delay_cycles (rtx arg) | |
1447 | { | |
1448 | HOST_WIDE_INT i, c, n; | |
1449 | /* extra cycles for MSP430X instructions */ | |
1450 | #define CYCX(M,X) (msp430x ? (X) : (M)) | |
1451 | ||
1452 | if (GET_CODE (arg) != CONST_INT) | |
1453 | { | |
1454 | error ("__delay_cycles() only takes constant arguments"); | |
1455 | return NULL_RTX; | |
1456 | } | |
1457 | ||
1458 | c = INTVAL (arg); | |
1459 | ||
1460 | if (HOST_BITS_PER_WIDE_INT > 32) | |
1461 | { | |
1462 | if (c < 0) | |
1463 | { | |
1464 | error ("__delay_cycles only takes non-negative cycle counts."); | |
1465 | return NULL_RTX; | |
1466 | } | |
1467 | } | |
1468 | ||
1469 | emit_insn (gen_delay_cycles_start (arg)); | |
1470 | ||
1471 | /* For 32-bit loops, there's 13(16) + 5(min(x,0x10000) + 6x cycles. */ | |
1472 | if (c > 3 * 0xffff + CYCX (7, 10)) | |
1473 | { | |
1474 | n = c; | |
1475 | /* There's 4 cycles in the short (i>0xffff) loop and 7 in the long (x<=0xffff) loop */ | |
1476 | if (c >= 0x10000 * 7 + CYCX (14, 16)) | |
1477 | { | |
1478 | i = 0x10000; | |
1479 | c -= CYCX (14, 16) + 7 * 0x10000; | |
1480 | i += c / 4; | |
1481 | c %= 4; | |
1482 | if ((unsigned long long) i > 0xffffffffULL) | |
1483 | { | |
1484 | error ("__delay_cycles is limited to 32-bit loop counts."); | |
1485 | return NULL_RTX; | |
1486 | } | |
1487 | } | |
1488 | else | |
1489 | { | |
1490 | i = (c - CYCX (14, 16)) / 7; | |
1491 | c -= CYCX (14, 16) + i * 7; | |
1492 | } | |
1493 | ||
1494 | if (cg_magic_constant (i & 0xffff)) | |
1495 | c ++; | |
1496 | if (cg_magic_constant ((i >> 16) & 0xffff)) | |
1497 | c ++; | |
1498 | ||
1499 | if (msp430x) | |
1500 | emit_insn (gen_delay_cycles_32x (GEN_INT (i), GEN_INT (n - c))); | |
1501 | else | |
1502 | emit_insn (gen_delay_cycles_32 (GEN_INT (i), GEN_INT (n - c))); | |
1503 | } | |
1504 | ||
1505 | /* For 16-bit loops, there's 7(10) + 3x cycles - so the max cycles is 0x30004(7). */ | |
1506 | if (c > 12) | |
1507 | { | |
1508 | n = c; | |
1509 | i = (c - CYCX (7, 10)) / 3; | |
1510 | c -= CYCX (7, 10) + i * 3; | |
1511 | ||
1512 | if (cg_magic_constant (i)) | |
1513 | c ++; | |
1514 | ||
1515 | if (msp430x) | |
1516 | emit_insn (gen_delay_cycles_16x (GEN_INT (i), GEN_INT (n - c))); | |
1517 | else | |
1518 | emit_insn (gen_delay_cycles_16 (GEN_INT (i), GEN_INT (n - c))); | |
1519 | } | |
1520 | ||
1521 | while (c > 1) | |
1522 | { | |
1523 | emit_insn (gen_delay_cycles_2 ()); | |
1524 | c -= 2; | |
1525 | } | |
1526 | ||
1527 | if (c) | |
1528 | { | |
1529 | emit_insn (gen_delay_cycles_1 ()); | |
1530 | c -= 1; | |
1531 | } | |
1532 | ||
1533 | emit_insn (gen_delay_cycles_end (arg)); | |
1534 | ||
1535 | return NULL_RTX; | |
1536 | } | |
1537 | ||
62b2ccbe | 1538 | static rtx |
1539 | msp430_expand_builtin (tree exp, | |
1540 | rtx target ATTRIBUTE_UNUSED, | |
1541 | rtx subtarget ATTRIBUTE_UNUSED, | |
3754d046 | 1542 | machine_mode mode ATTRIBUTE_UNUSED, |
62b2ccbe | 1543 | int ignore ATTRIBUTE_UNUSED) |
1544 | { | |
1545 | tree fndecl = TREE_OPERAND (CALL_EXPR_FN (exp), 0); | |
1546 | unsigned int fcode = DECL_FUNCTION_CODE (fndecl); | |
1547 | rtx arg1 = expand_normal (CALL_EXPR_ARG (exp, 0)); | |
1548 | ||
9f70b545 | 1549 | if (fcode == MSP430_BUILTIN_DELAY_CYCLES) |
1550 | return msp430_expand_delay_cycles (arg1); | |
1551 | ||
62b2ccbe | 1552 | if (! msp430_is_interrupt_func ()) |
1553 | { | |
1554 | error ("MSP430 builtin functions only work inside interrupt handlers"); | |
1555 | return NULL_RTX; | |
1556 | } | |
1557 | ||
1558 | if (! REG_P (arg1) && ! CONSTANT_P (arg1)) | |
1559 | arg1 = force_reg (mode, arg1); | |
1560 | ||
1561 | switch (fcode) | |
1562 | { | |
1563 | case MSP430_BUILTIN_BIC_SR: emit_insn (gen_bic_SR (arg1)); break; | |
1564 | case MSP430_BUILTIN_BIS_SR: emit_insn (gen_bis_SR (arg1)); break; | |
1565 | default: | |
1566 | internal_error ("bad builtin code"); | |
1567 | break; | |
1568 | } | |
1569 | return NULL_RTX; | |
1570 | } | |
1571 | ||
1572 | #undef TARGET_INIT_BUILTINS | |
1573 | #define TARGET_INIT_BUILTINS msp430_init_builtins | |
1574 | ||
1575 | #undef TARGET_EXPAND_BUILTIN | |
1576 | #define TARGET_EXPAND_BUILTIN msp430_expand_builtin | |
1577 | ||
1578 | #undef TARGET_BUILTIN_DECL | |
1579 | #define TARGET_BUILTIN_DECL msp430_builtin_decl | |
1580 | ||
e4a25868 | 1581 | void |
1582 | msp430_expand_prologue (void) | |
1583 | { | |
1584 | int i, j; | |
1585 | int fs; | |
1586 | /* Always use stack_pointer_rtx instead of calling | |
1587 | rtx_gen_REG ourselves. Code elsewhere in GCC assumes | |
1588 | that there is a single rtx representing the stack pointer, | |
1589 | namely stack_pointer_rtx, and uses == to recognize it. */ | |
1590 | rtx sp = stack_pointer_rtx; | |
1591 | rtx p; | |
1592 | ||
62b2ccbe | 1593 | if (is_naked_func ()) |
f87a602b | 1594 | { |
1595 | /* We must generate some RTX as thread_prologue_and_epilogue_insns() | |
1596 | examines the output of the gen_prologue() function. */ | |
1597 | emit_insn (gen_rtx_CLOBBER (VOIDmode, GEN_INT (0))); | |
1598 | return; | |
1599 | } | |
62b2ccbe | 1600 | |
e4a25868 | 1601 | emit_insn (gen_prologue_start_marker ()); |
1602 | ||
62b2ccbe | 1603 | if (is_critical_func ()) |
1604 | { | |
1605 | emit_insn (gen_push_intr_state ()); | |
1606 | emit_insn (gen_disable_interrupts ()); | |
1607 | } | |
1608 | else if (is_reentrant_func ()) | |
1609 | emit_insn (gen_disable_interrupts ()); | |
1610 | ||
e4a25868 | 1611 | if (!cfun->machine->computed) |
1612 | msp430_compute_frame_info (); | |
1613 | ||
1614 | if (flag_stack_usage_info) | |
1615 | current_function_static_stack_size = cfun->machine->framesize; | |
6956ee35 | 1616 | |
e4a25868 | 1617 | if (crtl->args.pretend_args_size) |
1618 | { | |
1619 | rtx note; | |
1620 | ||
1621 | gcc_assert (crtl->args.pretend_args_size == 2); | |
6956ee35 | 1622 | |
e4a25868 | 1623 | p = emit_insn (gen_grow_and_swap ()); |
1624 | ||
1625 | /* Document the stack decrement... */ | |
1626 | note = F (gen_rtx_SET (Pmode, stack_pointer_rtx, | |
1627 | gen_rtx_MINUS (Pmode, stack_pointer_rtx, GEN_INT (2)))); | |
1628 | add_reg_note (p, REG_FRAME_RELATED_EXPR, note); | |
1629 | ||
1630 | /* ...and the establishment of a new location for the return address. */ | |
1631 | note = F (gen_rtx_SET (Pmode, gen_rtx_MEM (Pmode, | |
1632 | gen_rtx_PLUS (Pmode, stack_pointer_rtx, GEN_INT (-2))), | |
1633 | pc_rtx)); | |
1634 | add_reg_note (p, REG_CFA_OFFSET, note); | |
1635 | F (p); | |
1636 | } | |
1637 | ||
1638 | for (i = 15; i >= 4; i--) | |
1639 | if (cfun->machine->need_to_save [i]) | |
1640 | { | |
1641 | int seq, count; | |
1642 | rtx note; | |
1643 | ||
1644 | for (seq = i - 1; seq >= 4 && cfun->machine->need_to_save[seq]; seq --) | |
1645 | ; | |
1646 | count = i - seq; | |
1647 | ||
1648 | if (msp430x) | |
1649 | { | |
1650 | /* Note: with TARGET_LARGE we still use PUSHM as PUSHX.A is two bytes bigger. */ | |
1651 | p = F (emit_insn (gen_pushm (gen_rtx_REG (Pmode, i), | |
1652 | GEN_INT (count)))); | |
1653 | ||
1654 | note = gen_rtx_SEQUENCE (VOIDmode, rtvec_alloc (count + 1)); | |
1655 | ||
1656 | XVECEXP (note, 0, 0) | |
1657 | = F (gen_rtx_SET (VOIDmode, | |
1658 | stack_pointer_rtx, | |
1659 | gen_rtx_PLUS (Pmode, | |
1660 | stack_pointer_rtx, | |
1661 | GEN_INT (count * (TARGET_LARGE ? -4 : -2))))); | |
1662 | ||
1663 | /* *sp-- = R[i-j] */ | |
1664 | /* sp+N R10 | |
1665 | ... | |
1666 | sp R4 */ | |
1667 | for (j = 0; j < count; j ++) | |
1668 | { | |
1669 | rtx addr; | |
1670 | int ofs = (count - j - 1) * (TARGET_LARGE ? 4 : 2); | |
1671 | ||
1672 | if (ofs) | |
1673 | addr = gen_rtx_PLUS (Pmode, sp, GEN_INT (ofs)); | |
1674 | else | |
1675 | addr = stack_pointer_rtx; | |
1676 | ||
6956ee35 | 1677 | XVECEXP (note, 0, j + 1) = |
e4a25868 | 1678 | F (gen_rtx_SET (VOIDmode, |
1679 | gen_rtx_MEM (Pmode, addr), | |
1680 | gen_rtx_REG (Pmode, i - j)) ); | |
1681 | } | |
1682 | ||
1683 | add_reg_note (p, REG_FRAME_RELATED_EXPR, note); | |
1684 | i -= count - 1; | |
1685 | } | |
1686 | else | |
1687 | F (emit_insn (gen_push (gen_rtx_REG (Pmode, i)))); | |
1688 | } | |
1689 | ||
1690 | if (frame_pointer_needed) | |
1691 | F (emit_move_insn (gen_rtx_REG (Pmode, FRAME_POINTER_REGNUM), sp)); | |
1692 | ||
1693 | fs = cfun->machine->framesize_locals + cfun->machine->framesize_outgoing; | |
1694 | ||
1695 | increment_stack (- fs); | |
1696 | ||
1697 | emit_insn (gen_prologue_end_marker ()); | |
1698 | } | |
1699 | ||
1700 | void | |
1701 | msp430_expand_epilogue (int is_eh) | |
1702 | { | |
1703 | int i; | |
1704 | int fs; | |
1705 | int helper_n = 0; | |
1706 | ||
62b2ccbe | 1707 | if (is_naked_func ()) |
f87a602b | 1708 | { |
1709 | /* We must generate some RTX as thread_prologue_and_epilogue_insns() | |
1710 | examines the output of the gen_epilogue() function. */ | |
1711 | emit_insn (gen_rtx_CLOBBER (VOIDmode, GEN_INT (0))); | |
1712 | return; | |
1713 | } | |
62b2ccbe | 1714 | |
e4a25868 | 1715 | if (cfun->machine->need_to_save [10]) |
1716 | { | |
1717 | /* Check for a helper function. */ | |
9b52871c | 1718 | helper_n = 7; /* For when the loop below never sees a match. */ |
e4a25868 | 1719 | for (i = 9; i >= 4; i--) |
1720 | if (!cfun->machine->need_to_save [i]) | |
1721 | { | |
1722 | helper_n = 10 - i; | |
1723 | for (; i >= 4; i--) | |
1724 | if (cfun->machine->need_to_save [i]) | |
1725 | { | |
1726 | helper_n = 0; | |
1727 | break; | |
1728 | } | |
1729 | break; | |
1730 | } | |
1731 | } | |
1732 | ||
1733 | emit_insn (gen_epilogue_start_marker ()); | |
1734 | ||
9d636c05 | 1735 | if (cfun->decl && strcmp (IDENTIFIER_POINTER (DECL_NAME (cfun->decl)), "main") == 0) |
1736 | emit_insn (gen_msp430_refsym_need_exit ()); | |
1737 | ||
0a9aab6d | 1738 | if (is_wakeup_func ()) |
1739 | /* Clear the SCG1, SCG0, OSCOFF and CPUOFF bits in the saved copy of the | |
1740 | status register current residing on the stack. When this function | |
1741 | executes its RETI instruction the SR will be updated with this saved | |
1742 | value, thus ensuring that the processor is woken up from any low power | |
1743 | state in which it may be residing. */ | |
1744 | emit_insn (gen_bic_SR (GEN_INT (0xf0))); | |
1745 | ||
e4a25868 | 1746 | fs = cfun->machine->framesize_locals + cfun->machine->framesize_outgoing; |
1747 | ||
1748 | increment_stack (fs); | |
1749 | ||
1750 | if (is_eh) | |
1751 | { | |
1752 | /* We need to add the right "SP" register save just after the | |
1753 | regular ones, so that when we pop it off we're in the EH | |
1754 | return frame, not this one. This overwrites our own return | |
1755 | address, but we're not going to be returning anyway. */ | |
1756 | rtx r12 = gen_rtx_REG (Pmode, 12); | |
1757 | rtx (*addPmode)(rtx, rtx, rtx) = TARGET_LARGE ? gen_addpsi3 : gen_addhi3; | |
1758 | ||
1759 | /* R12 will hold the new SP. */ | |
1760 | i = cfun->machine->framesize_regs; | |
1761 | emit_move_insn (r12, stack_pointer_rtx); | |
1762 | emit_insn (addPmode (r12, r12, EH_RETURN_STACKADJ_RTX)); | |
1763 | emit_insn (addPmode (r12, r12, GEN_INT (i))); | |
1764 | emit_move_insn (gen_rtx_MEM (Pmode, plus_constant (Pmode, stack_pointer_rtx, i)), r12); | |
1765 | } | |
1766 | ||
1767 | for (i = 4; i <= 15; i++) | |
1768 | if (cfun->machine->need_to_save [i]) | |
1769 | { | |
1770 | int seq, count; | |
1771 | ||
1772 | for (seq = i + 1; seq <= 15 && cfun->machine->need_to_save[seq]; seq ++) | |
1773 | ; | |
1774 | count = seq - i; | |
1775 | ||
1776 | if (msp430x) | |
1777 | { | |
abe1609f | 1778 | /* Note: With TARGET_LARGE we still use |
1779 | POPM as POPX.A is two bytes bigger. */ | |
1780 | emit_insn (gen_popm (stack_pointer_rtx, GEN_INT (seq - 1), | |
e4a25868 | 1781 | GEN_INT (count))); |
1782 | i += count - 1; | |
1783 | } | |
1784 | else if (i == 11 - helper_n | |
62b2ccbe | 1785 | && ! msp430_is_interrupt_func () |
1786 | && ! is_reentrant_func () | |
1787 | && ! is_critical_func () | |
e4a25868 | 1788 | && crtl->args.pretend_args_size == 0 |
1789 | /* Calling the helper takes as many bytes as the POP;RET sequence. */ | |
9b52871c | 1790 | && helper_n > 1 |
e4a25868 | 1791 | && !is_eh) |
1792 | { | |
1793 | emit_insn (gen_epilogue_helper (GEN_INT (helper_n))); | |
1794 | return; | |
1795 | } | |
1796 | else | |
1797 | emit_insn (gen_pop (gen_rtx_REG (Pmode, i))); | |
1798 | } | |
1799 | ||
1800 | if (is_eh) | |
1801 | { | |
1802 | /* Also pop SP, which puts us into the EH return frame. Except | |
1803 | that you can't "pop" sp, you have to just load it off the | |
1804 | stack. */ | |
1805 | emit_move_insn (stack_pointer_rtx, gen_rtx_MEM (Pmode, stack_pointer_rtx)); | |
1806 | } | |
1807 | ||
1808 | if (crtl->args.pretend_args_size) | |
1809 | emit_insn (gen_swap_and_shrink ()); | |
62b2ccbe | 1810 | |
1811 | if (is_critical_func ()) | |
1812 | emit_insn (gen_pop_intr_state ()); | |
1813 | else if (is_reentrant_func ()) | |
1814 | emit_insn (gen_enable_interrupts ()); | |
1815 | ||
e4a25868 | 1816 | emit_jump_insn (gen_msp_return ()); |
1817 | } | |
1818 | ||
1819 | /* Implements EH_RETURN_STACKADJ_RTX. Saved and used later in | |
1820 | m32c_emit_eh_epilogue. */ | |
1821 | rtx | |
1822 | msp430_eh_return_stackadj_rtx (void) | |
1823 | { | |
1824 | if (!cfun->machine->eh_stack_adjust) | |
1825 | { | |
1826 | rtx sa; | |
1827 | ||
1828 | sa = gen_rtx_REG (Pmode, 15); | |
1829 | cfun->machine->eh_stack_adjust = sa; | |
1830 | } | |
1831 | return cfun->machine->eh_stack_adjust; | |
1832 | } | |
1833 | ||
1834 | /* This function is called before reload, to "fix" the stack in | |
1835 | preparation for an EH return. */ | |
1836 | void | |
1837 | msp430_expand_eh_return (rtx eh_handler) | |
1838 | { | |
1839 | /* These are all Pmode */ | |
1840 | rtx ap, sa, ra, tmp; | |
1841 | ||
1842 | ap = arg_pointer_rtx; | |
1843 | sa = msp430_eh_return_stackadj_rtx (); | |
1844 | ra = eh_handler; | |
1845 | ||
1846 | tmp = ap; | |
1847 | tmp = gen_rtx_PLUS (Pmode, ap, sa); | |
1848 | tmp = plus_constant (Pmode, tmp, TARGET_LARGE ? -4 : -2); | |
1849 | tmp = gen_rtx_MEM (Pmode, tmp); | |
1850 | emit_move_insn (tmp, ra); | |
1851 | } | |
1852 | ||
f6bba390 | 1853 | #undef TARGET_INIT_DWARF_REG_SIZES_EXTRA |
1854 | #define TARGET_INIT_DWARF_REG_SIZES_EXTRA msp430_init_dwarf_reg_sizes_extra | |
1855 | void | |
1856 | msp430_init_dwarf_reg_sizes_extra (tree address) | |
1857 | { | |
1858 | int i; | |
1859 | rtx addr = expand_normal (address); | |
1860 | rtx mem = gen_rtx_MEM (BLKmode, addr); | |
1861 | ||
1862 | if (!msp430x) | |
1863 | return; | |
1864 | ||
1865 | for (i = 0; i < FIRST_PSEUDO_REGISTER; i++) | |
1866 | { | |
1867 | unsigned int dnum = DWARF_FRAME_REGNUM (i); | |
1868 | unsigned int rnum = DWARF2_FRAME_REG_OUT (dnum, 1); | |
1869 | ||
1870 | if (rnum < DWARF_FRAME_REGISTERS) | |
1871 | { | |
1872 | HOST_WIDE_INT offset = rnum * GET_MODE_SIZE (QImode); | |
1873 | ||
1874 | emit_move_insn (adjust_address (mem, QImode, offset), | |
1875 | gen_int_mode (4, QImode)); | |
1876 | } | |
1877 | } | |
1878 | } | |
1879 | ||
e4a25868 | 1880 | /* This is a list of MD patterns that implement fixed-count shifts. */ |
62b2ccbe | 1881 | static struct |
1882 | { | |
e4a25868 | 1883 | const char *name; |
1884 | int count; | |
1885 | int need_430x; | |
1886 | rtx (*genfunc)(rtx,rtx); | |
62b2ccbe | 1887 | } |
1888 | const_shift_helpers[] = | |
1889 | { | |
e4a25868 | 1890 | #define CSH(N,C,X,G) { "__mspabi_"N, C, X, gen_##G } |
1891 | ||
1892 | CSH ("slli", 1, 1, slli_1), | |
1893 | CSH ("slll", 1, 1, slll_1), | |
1894 | CSH ("slll", 2, 1, slll_2), | |
1895 | ||
1896 | CSH ("srai", 1, 0, srai_1), | |
1897 | CSH ("sral", 1, 0, sral_1), | |
1898 | CSH ("sral", 2, 0, sral_2), | |
1899 | ||
1900 | CSH ("srll", 1, 0, srll_1), | |
1901 | CSH ("srll", 2, 1, srll_2x), | |
1902 | { 0, 0, 0, 0 } | |
1903 | #undef CSH | |
1904 | }; | |
1905 | ||
1906 | /* The MSP430 ABI defines a number of helper functions that should be | |
1907 | used for, for example, 32-bit shifts. This function is called to | |
1908 | emit such a function, using the table above to optimize some | |
1909 | cases. */ | |
1910 | void | |
1911 | msp430_expand_helper (rtx *operands, const char *helper_name, bool const_variants) | |
1912 | { | |
1913 | rtx c, f; | |
1914 | char *helper_const = NULL; | |
1915 | int arg2 = 13; | |
1916 | int arg1sz = 1; | |
3754d046 | 1917 | machine_mode arg0mode = GET_MODE (operands[0]); |
1918 | machine_mode arg1mode = GET_MODE (operands[1]); | |
1919 | machine_mode arg2mode = GET_MODE (operands[2]); | |
e4a25868 | 1920 | int have_430x = msp430x ? 1 : 0; |
1921 | ||
1922 | if (CONST_INT_P (operands[2])) | |
1923 | { | |
1924 | int i; | |
1925 | ||
1926 | for (i=0; const_shift_helpers[i].name; i++) | |
1927 | { | |
1928 | if (const_shift_helpers[i].need_430x <= have_430x | |
1929 | && strcmp (helper_name, const_shift_helpers[i].name) == 0 | |
1930 | && INTVAL (operands[2]) == const_shift_helpers[i].count) | |
1931 | { | |
1932 | emit_insn (const_shift_helpers[i].genfunc (operands[0], operands[1])); | |
1933 | return; | |
1934 | } | |
1935 | } | |
1936 | } | |
1937 | ||
1938 | if (arg1mode == VOIDmode) | |
1939 | arg1mode = arg0mode; | |
1940 | if (arg2mode == VOIDmode) | |
1941 | arg2mode = arg0mode; | |
1942 | ||
1943 | if (arg1mode == SImode) | |
1944 | { | |
1945 | arg2 = 14; | |
1946 | arg1sz = 2; | |
1947 | } | |
1948 | ||
1949 | if (const_variants | |
1950 | && CONST_INT_P (operands[2]) | |
1951 | && INTVAL (operands[2]) >= 1 | |
1952 | && INTVAL (operands[2]) <= 15) | |
1953 | { | |
1954 | /* Note that the INTVAL is limited in value and length by the conditional above. */ | |
1955 | int len = strlen (helper_name) + 4; | |
1956 | helper_const = (char *) xmalloc (len); | |
9b52871c | 1957 | snprintf (helper_const, len, "%s_%d", helper_name, (int) INTVAL (operands[2])); |
e4a25868 | 1958 | } |
1959 | ||
1960 | emit_move_insn (gen_rtx_REG (arg1mode, 12), | |
1961 | operands[1]); | |
1962 | if (!helper_const) | |
1963 | emit_move_insn (gen_rtx_REG (arg2mode, arg2), | |
1964 | operands[2]); | |
1965 | ||
1966 | c = gen_call_value_internal (gen_rtx_REG (arg0mode, 12), | |
1967 | gen_rtx_SYMBOL_REF (VOIDmode, helper_const ? helper_const : helper_name), | |
1968 | GEN_INT (0)); | |
1969 | c = emit_call_insn (c); | |
1970 | RTL_CONST_CALL_P (c) = 1; | |
1971 | ||
1972 | f = 0; | |
1973 | use_regs (&f, 12, arg1sz); | |
1974 | if (!helper_const) | |
1975 | use_regs (&f, arg2, 1); | |
1976 | add_function_usage_to (c, f); | |
1977 | ||
1978 | emit_move_insn (operands[0], | |
1979 | gen_rtx_REG (arg0mode, 12)); | |
1980 | } | |
1981 | ||
1982 | /* Called by cbranch<mode>4 to coerce operands into usable forms. */ | |
1983 | void | |
3754d046 | 1984 | msp430_fixup_compare_operands (machine_mode my_mode, rtx * operands) |
e4a25868 | 1985 | { |
1986 | /* constants we're looking for, not constants which are allowed. */ | |
1987 | int const_op_idx = 1; | |
1988 | ||
1989 | if (msp430_reversible_cmp_operator (operands[0], VOIDmode)) | |
1990 | const_op_idx = 2; | |
1991 | ||
1992 | if (GET_CODE (operands[const_op_idx]) != REG | |
1993 | && GET_CODE (operands[const_op_idx]) != MEM) | |
1994 | operands[const_op_idx] = copy_to_mode_reg (my_mode, operands[const_op_idx]); | |
1995 | } | |
1996 | ||
1997 | /* Simplify_gen_subreg() doesn't handle memory references the way we | |
1998 | need it to below, so we use this function for when we must get a | |
1999 | valid subreg in a "natural" state. */ | |
2000 | rtx | |
3754d046 | 2001 | msp430_subreg (machine_mode mode, rtx r, machine_mode omode, int byte) |
e4a25868 | 2002 | { |
2003 | rtx rv; | |
2004 | ||
2005 | if (GET_CODE (r) == SUBREG | |
2006 | && SUBREG_BYTE (r) == 0) | |
2007 | { | |
2008 | rtx ireg = SUBREG_REG (r); | |
3754d046 | 2009 | machine_mode imode = GET_MODE (ireg); |
e4a25868 | 2010 | |
2011 | /* special case for (HI (SI (PSI ...), 0)) */ | |
2012 | if (imode == PSImode | |
2013 | && mode == HImode | |
2014 | && byte == 0) | |
2015 | rv = gen_rtx_SUBREG (mode, ireg, byte); | |
2016 | else | |
2017 | rv = simplify_gen_subreg (mode, ireg, imode, byte); | |
2018 | } | |
2019 | else if (GET_CODE (r) == MEM) | |
2020 | rv = adjust_address (r, mode, byte); | |
2021 | else | |
2022 | rv = simplify_gen_subreg (mode, r, omode, byte); | |
2023 | ||
2024 | if (!rv) | |
2025 | gcc_unreachable (); | |
2026 | ||
2027 | return rv; | |
2028 | } | |
2029 | ||
2030 | /* Called by movsi_x to generate the HImode operands. */ | |
2031 | void | |
2032 | msp430_split_movsi (rtx *operands) | |
2033 | { | |
2034 | rtx op00, op02, op10, op12; | |
2035 | ||
2036 | op00 = msp430_subreg (HImode, operands[0], SImode, 0); | |
2037 | op02 = msp430_subreg (HImode, operands[0], SImode, 2); | |
2038 | ||
2039 | if (GET_CODE (operands[1]) == CONST | |
2040 | || GET_CODE (operands[1]) == SYMBOL_REF) | |
2041 | { | |
2042 | op10 = gen_rtx_ZERO_EXTRACT (HImode, operands[1], GEN_INT (16), GEN_INT (0)); | |
2043 | op10 = gen_rtx_CONST (HImode, op10); | |
2044 | op12 = gen_rtx_ZERO_EXTRACT (HImode, operands[1], GEN_INT (16), GEN_INT (16)); | |
2045 | op12 = gen_rtx_CONST (HImode, op12); | |
2046 | } | |
2047 | else | |
2048 | { | |
2049 | op10 = msp430_subreg (HImode, operands[1], SImode, 0); | |
2050 | op12 = msp430_subreg (HImode, operands[1], SImode, 2); | |
2051 | } | |
2052 | ||
2053 | if (rtx_equal_p (operands[0], operands[1])) | |
2054 | { | |
2055 | operands[2] = op02; | |
2056 | operands[4] = op12; | |
2057 | operands[3] = op00; | |
2058 | operands[5] = op10; | |
2059 | } | |
2060 | else if (rtx_equal_p (op00, op12) | |
2061 | /* Catch the case where we are loading (rN, rN+1) from mem (rN). */ | |
2062 | || (REG_P (op00) && reg_mentioned_p (op00, op10)) | |
2063 | /* Or storing (rN) into mem (rN). */ | |
2064 | || (REG_P (op10) && reg_mentioned_p (op10, op00)) | |
2065 | ) | |
2066 | { | |
2067 | operands[2] = op02; | |
2068 | operands[4] = op12; | |
2069 | operands[3] = op00; | |
2070 | operands[5] = op10; | |
2071 | } | |
2072 | else | |
2073 | { | |
2074 | operands[2] = op00; | |
2075 | operands[4] = op10; | |
2076 | operands[3] = op02; | |
2077 | operands[5] = op12; | |
2078 | } | |
2079 | } | |
2080 | ||
2081 | \f | |
e4a25868 | 2082 | /* The MSPABI specifies the names of various helper functions, many of |
2083 | which are compatible with GCC's helpers. This table maps the GCC | |
2084 | name to the MSPABI name. */ | |
2085 | static const struct | |
2086 | { | |
2087 | char const * const gcc_name; | |
2088 | char const * const ti_name; | |
2089 | } | |
2090 | helper_function_name_mappings [] = | |
2091 | { | |
2092 | /* Floating point to/from integer conversions. */ | |
2093 | { "__truncdfsf2", "__mspabi_cvtdf" }, | |
2094 | { "__extendsfdf2", "__mspabi_cvtfd" }, | |
2095 | { "__fixdfhi", "__mspabi_fixdi" }, | |
2096 | { "__fixdfsi", "__mspabi_fixdli" }, | |
2097 | { "__fixdfdi", "__mspabi_fixdlli" }, | |
2098 | { "__fixunsdfhi", "__mspabi_fixdu" }, | |
2099 | { "__fixunsdfsi", "__mspabi_fixdul" }, | |
2100 | { "__fixunsdfdi", "__mspabi_fixdull" }, | |
2101 | { "__fixsfhi", "__mspabi_fixfi" }, | |
2102 | { "__fixsfsi", "__mspabi_fixfli" }, | |
2103 | { "__fixsfdi", "__mspabi_fixflli" }, | |
2104 | { "__fixunsfhi", "__mspabi_fixfu" }, | |
2105 | { "__fixunsfsi", "__mspabi_fixful" }, | |
2106 | { "__fixunsfdi", "__mspabi_fixfull" }, | |
2107 | { "__floathisf", "__mspabi_fltif" }, | |
2108 | { "__floatsisf", "__mspabi_fltlif" }, | |
2109 | { "__floatdisf", "__mspabi_fltllif" }, | |
2110 | { "__floathidf", "__mspabi_fltid" }, | |
2111 | { "__floatsidf", "__mspabi_fltlid" }, | |
2112 | { "__floatdidf", "__mspabi_fltllid" }, | |
2113 | { "__floatunhisf", "__mspabi_fltuf" }, | |
2114 | { "__floatunsisf", "__mspabi_fltulf" }, | |
2115 | { "__floatundisf", "__mspabi_fltullf" }, | |
2116 | { "__floatunhidf", "__mspabi_fltud" }, | |
2117 | { "__floatunsidf", "__mspabi_fltuld" }, | |
2118 | { "__floatundidf", "__mspabi_fltulld" }, | |
2119 | ||
2120 | /* Floating point comparisons. */ | |
2121 | /* GCC uses individual functions for each comparison, TI uses one | |
2122 | compare <=> function. */ | |
2123 | ||
2124 | /* Floating point arithmatic */ | |
2125 | { "__adddf3", "__mspabi_addd" }, | |
2126 | { "__addsf3", "__mspabi_addf" }, | |
2127 | { "__divdf3", "__mspabi_divd" }, | |
2128 | { "__divsf3", "__mspabi_divf" }, | |
2129 | { "__muldf3", "__mspabi_mpyd" }, | |
2130 | { "__mulsf3", "__mspabi_mpyf" }, | |
2131 | { "__subdf3", "__mspabi_subd" }, | |
2132 | { "__subsf3", "__mspabi_subf" }, | |
2133 | /* GCC does not use helper functions for negation */ | |
2134 | ||
2135 | /* Integer multiply, divide, remainder. */ | |
e4a25868 | 2136 | { "__mulhi3", "__mspabi_mpyi" }, |
2137 | { "__mulsi3", "__mspabi_mpyl" }, | |
2138 | { "__muldi3", "__mspabi_mpyll" }, | |
2139 | #if 0 | |
2140 | /* Clarify signed vs unsigned first. */ | |
2141 | { "__mulhisi3", "__mspabi_mpysl" }, /* gcc doesn't use widening multiply (yet?) */ | |
2142 | { "__mulsidi3", "__mspabi_mpysll" }, /* gcc doesn't use widening multiply (yet?) */ | |
2143 | #endif | |
2144 | ||
2145 | { "__divhi3", "__mspabi_divi" }, | |
2146 | { "__divsi3", "__mspabi_divli" }, | |
2147 | { "__divdi3", "__mspabi_divlli" }, | |
2148 | { "__udivhi3", "__mspabi_divu" }, | |
2149 | { "__udivsi3", "__mspabi_divlu" }, | |
2150 | { "__udivdi3", "__mspabi_divllu" }, | |
2151 | { "__modhi3", "__mspabi_remi" }, | |
2152 | { "__modsi3", "__mspabi_remli" }, | |
2153 | { "__moddi3", "__mspabi_remlli" }, | |
2154 | { "__umodhi3", "__mspabi_remu" }, | |
2155 | { "__umodsi3", "__mspabi_remul" }, | |
2156 | { "__umoddi3", "__mspabi_remull" }, | |
2157 | ||
2158 | /* Bitwise operations. */ | |
2159 | /* Rotation - no rotation support yet. */ | |
2160 | /* Logical left shift - gcc already does these itself. */ | |
2161 | /* Arithmetic left shift - gcc already does these itself. */ | |
2162 | /* Arithmetic right shift - gcc already does these itself. */ | |
2163 | ||
2164 | { NULL, NULL } | |
2165 | }; | |
2166 | ||
f87a602b | 2167 | /* Returns true if the current MCU supports an F5xxx series |
2168 | hardware multiper. */ | |
2169 | ||
6956ee35 | 2170 | bool |
c05cbf30 | 2171 | msp430_use_f5_series_hwmult (void) |
6956ee35 | 2172 | { |
f87a602b | 2173 | static const char * cached_match = NULL; |
2174 | static bool cached_result; | |
2175 | ||
c05cbf30 | 2176 | if (msp430_hwmult_type == F5SERIES) |
2177 | return true; | |
2178 | ||
2179 | if (target_mcu == NULL || msp430_hwmult_type != AUTO) | |
6956ee35 | 2180 | return false; |
c05cbf30 | 2181 | |
f87a602b | 2182 | if (target_mcu == cached_match) |
2183 | return cached_result; | |
2184 | ||
2185 | cached_match = target_mcu; | |
2186 | ||
2187 | if (strncasecmp (target_mcu, "msp430f5", 8) == 0) | |
2188 | return cached_result = true; | |
2189 | ||
2190 | static const char * known_f5_mult_mcus [] = | |
2191 | { | |
2192 | "cc430f5123", "cc430f5125", "cc430f5133", | |
2193 | "cc430f5135", "cc430f5137", "cc430f5143", | |
2194 | "cc430f5145", "cc430f5147", "cc430f6125", | |
2195 | "cc430f6126", "cc430f6127", "cc430f6135", | |
2196 | "cc430f6137", "cc430f6143", "cc430f6145", | |
2197 | "cc430f6147", "msp430bt5190", "msp430sl5438a" | |
2198 | }; | |
2199 | int i; | |
2200 | ||
2201 | for (i = ARRAY_SIZE (known_f5_mult_mcus); i--;) | |
2202 | if (strcasecmp (target_mcu, known_f5_mult_mcus[i]) == 0) | |
2203 | return cached_result = true; | |
2204 | ||
2205 | return cached_result = false; | |
6956ee35 | 2206 | } |
2207 | ||
f87a602b | 2208 | /* Returns true if the current MCU has a second generation |
2209 | 32-bit hardware multiplier. */ | |
2210 | ||
6956ee35 | 2211 | static bool |
c05cbf30 | 2212 | use_32bit_hwmult (void) |
6956ee35 | 2213 | { |
2214 | static const char * known_32bit_mult_mcus [] = | |
2215 | { | |
2216 | "msp430f4783", "msp430f4793", "msp430f4784", | |
2217 | "msp430f4794", "msp430f47126", "msp430f47127", | |
2218 | "msp430f47163", "msp430f47173", "msp430f47183", | |
2219 | "msp430f47193", "msp430f47166", "msp430f47176", | |
2220 | "msp430f47186", "msp430f47196", "msp430f47167", | |
2221 | "msp430f47177", "msp430f47187", "msp430f47197" | |
2222 | }; | |
f87a602b | 2223 | static const char * cached_match = NULL; |
2224 | static bool cached_result; | |
6956ee35 | 2225 | int i; |
c05cbf30 | 2226 | |
2227 | if (msp430_hwmult_type == LARGE) | |
2228 | return true; | |
2229 | ||
2230 | if (target_mcu == NULL || msp430_hwmult_type != AUTO) | |
6956ee35 | 2231 | return false; |
2232 | ||
f87a602b | 2233 | if (target_mcu == cached_match) |
2234 | return cached_result; | |
2235 | ||
2236 | cached_match = target_mcu; | |
6956ee35 | 2237 | for (i = ARRAY_SIZE (known_32bit_mult_mcus); i--;) |
2238 | if (strcasecmp (target_mcu, known_32bit_mult_mcus[i]) == 0) | |
f87a602b | 2239 | return cached_result = true; |
6956ee35 | 2240 | |
f87a602b | 2241 | return cached_result = false; |
2242 | } | |
2243 | ||
2244 | /* Returns true if the current MCU does not have a | |
2245 | hardware multiplier of any kind. */ | |
2246 | ||
2247 | static bool | |
2248 | msp430_no_hwmult (void) | |
2249 | { | |
2250 | static const char * known_nomult_mcus [] = | |
2251 | { | |
2252 | "msp430c091", "msp430c092", "msp430c111", | |
2253 | "msp430c1111", "msp430c112", "msp430c1121", | |
2254 | "msp430c1331", "msp430c1351", "msp430c311s", | |
2255 | "msp430c312", "msp430c313", "msp430c314", | |
2256 | "msp430c315", "msp430c323", "msp430c325", | |
2257 | "msp430c412", "msp430c413", "msp430e112", | |
2258 | "msp430e313", "msp430e315", "msp430e325", | |
2259 | "msp430f110", "msp430f1101", "msp430f1101a", | |
2260 | "msp430f1111", "msp430f1111a", "msp430f112", | |
2261 | "msp430f1121", "msp430f1121a", "msp430f1122", | |
2262 | "msp430f1132", "msp430f122", "msp430f1222", | |
2263 | "msp430f123", "msp430f1232", "msp430f133", | |
2264 | "msp430f135", "msp430f155", "msp430f156", | |
2265 | "msp430f157", "msp430f2001", "msp430f2002", | |
2266 | "msp430f2003", "msp430f2011", "msp430f2012", | |
2267 | "msp430f2013", "msp430f2101", "msp430f2111", | |
2268 | "msp430f2112", "msp430f2121", "msp430f2122", | |
2269 | "msp430f2131", "msp430f2132", "msp430f2232", | |
2270 | "msp430f2234", "msp430f2252", "msp430f2254", | |
2271 | "msp430f2272", "msp430f2274", "msp430f412", | |
2272 | "msp430f413", "msp430f4132", "msp430f415", | |
2273 | "msp430f4152", "msp430f417", "msp430f4250", | |
2274 | "msp430f4260", "msp430f4270", "msp430f435", | |
2275 | "msp430f4351", "msp430f436", "msp430f4361", | |
2276 | "msp430f437", "msp430f4371", "msp430f438", | |
2277 | "msp430f439", "msp430f477", "msp430f478", | |
2278 | "msp430f479", "msp430fe423", "msp430fe4232", | |
2279 | "msp430fe423a", "msp430fe4242", "msp430fe425", | |
2280 | "msp430fe4252", "msp430fe425a", "msp430fe427", | |
2281 | "msp430fe4272", "msp430fe427a", "msp430fg4250", | |
2282 | "msp430fg4260", "msp430fg4270", "msp430fg437", | |
2283 | "msp430fg438", "msp430fg439", "msp430fg477", | |
2284 | "msp430fg478", "msp430fg479", "msp430fr2032", | |
2285 | "msp430fr2033", "msp430fr4131", "msp430fr4132", | |
2286 | "msp430fr4133", "msp430fw423", "msp430fw425", | |
2287 | "msp430fw427", "msp430fw428", "msp430fw429", | |
2288 | "msp430g2001", "msp430g2101", "msp430g2102", | |
2289 | "msp430g2111", "msp430g2112", "msp430g2113", | |
2290 | "msp430g2121", "msp430g2131", "msp430g2132", | |
2291 | "msp430g2152", "msp430g2153", "msp430g2201", | |
2292 | "msp430g2202", "msp430g2203", "msp430g2210", | |
2293 | "msp430g2211", "msp430g2212", "msp430g2213", | |
2294 | "msp430g2221", "msp430g2230", "msp430g2231", | |
2295 | "msp430g2232", "msp430g2233", "msp430g2252", | |
2296 | "msp430g2253", "msp430g2302", "msp430g2303", | |
2297 | "msp430g2312", "msp430g2313", "msp430g2332", | |
2298 | "msp430g2333", "msp430g2352", "msp430g2353", | |
2299 | "msp430g2402", "msp430g2403", "msp430g2412", | |
2300 | "msp430g2413", "msp430g2432", "msp430g2433", | |
2301 | "msp430g2444", "msp430g2452", "msp430g2453", | |
2302 | "msp430g2513", "msp430g2533", "msp430g2544", | |
2303 | "msp430g2553", "msp430g2744", "msp430g2755", | |
2304 | "msp430g2855", "msp430g2955", "msp430l092", | |
2305 | "msp430p112", "msp430p313", "msp430p315", | |
2306 | "msp430p315s", "msp430p325", "msp430tch5e" | |
2307 | }; | |
2308 | static const char * cached_match = NULL; | |
2309 | static bool cached_result; | |
2310 | int i; | |
2311 | ||
2312 | if (msp430_hwmult_type == NONE) | |
2313 | return true; | |
2314 | ||
2315 | if (target_mcu == NULL || msp430_hwmult_type != AUTO) | |
2316 | return false; | |
2317 | ||
2318 | if (target_mcu == cached_match) | |
2319 | return cached_result; | |
2320 | ||
2321 | cached_match = target_mcu; | |
2322 | for (i = ARRAY_SIZE (known_nomult_mcus); i--;) | |
2323 | if (strcasecmp (target_mcu, known_nomult_mcus[i]) == 0) | |
2324 | return cached_result = true; | |
2325 | ||
2326 | return cached_result = false; | |
6956ee35 | 2327 | } |
2328 | ||
e4a25868 | 2329 | /* This function does the same as the default, but it will replace GCC |
2330 | function names with the MSPABI-specified ones. */ | |
f87a602b | 2331 | |
e4a25868 | 2332 | void |
2333 | msp430_output_labelref (FILE *file, const char *name) | |
2334 | { | |
2335 | int i; | |
2336 | ||
2337 | for (i = 0; helper_function_name_mappings [i].gcc_name; i++) | |
6956ee35 | 2338 | if (strcmp (helper_function_name_mappings [i].gcc_name, name) == 0) |
e4a25868 | 2339 | { |
6956ee35 | 2340 | name = helper_function_name_mappings [i].ti_name; |
2341 | break; | |
e4a25868 | 2342 | } |
2343 | ||
6956ee35 | 2344 | /* If we have been given a specific MCU name then we may be |
2345 | able to make use of its hardware multiply capabilities. */ | |
c05cbf30 | 2346 | if (msp430_hwmult_type != NONE) |
6956ee35 | 2347 | { |
2348 | if (strcmp ("__mspabi_mpyi", name) == 0) | |
2349 | { | |
c05cbf30 | 2350 | if (msp430_use_f5_series_hwmult ()) |
6956ee35 | 2351 | name = "__mulhi2_f5"; |
f87a602b | 2352 | else if (! msp430_no_hwmult ()) |
6956ee35 | 2353 | name = "__mulhi2"; |
2354 | } | |
2355 | else if (strcmp ("__mspabi_mpyl", name) == 0) | |
2356 | { | |
c05cbf30 | 2357 | if (msp430_use_f5_series_hwmult ()) |
6956ee35 | 2358 | name = "__mulsi2_f5"; |
c05cbf30 | 2359 | else if (use_32bit_hwmult ()) |
6956ee35 | 2360 | name = "__mulsi2_hw32"; |
f87a602b | 2361 | else if (! msp430_no_hwmult ()) |
6956ee35 | 2362 | name = "__mulsi2"; |
2363 | } | |
2364 | } | |
2365 | ||
e4a25868 | 2366 | fputs (name, file); |
2367 | } | |
2368 | ||
9b52871c | 2369 | /* Common code for msp430_print_operand... */ |
e4a25868 | 2370 | |
e4a25868 | 2371 | static void |
9b52871c | 2372 | msp430_print_operand_raw (FILE * file, rtx op) |
e4a25868 | 2373 | { |
0a9aab6d | 2374 | HOST_WIDE_INT i; |
e4a25868 | 2375 | |
2376 | switch (GET_CODE (op)) | |
2377 | { | |
2378 | case REG: | |
2379 | fprintf (file, "%s", reg_names [REGNO (op)]); | |
2380 | break; | |
2381 | ||
2382 | case CONST_INT: | |
2383 | i = INTVAL (op); | |
2384 | if (TARGET_ASM_HEX) | |
0a9aab6d | 2385 | fprintf (file, "%#" HOST_WIDE_INT_PRINT "x", i); |
e4a25868 | 2386 | else |
0a9aab6d | 2387 | fprintf (file, "%" HOST_WIDE_INT_PRINT "d", i); |
e4a25868 | 2388 | break; |
2389 | ||
2390 | case CONST: | |
2391 | case PLUS: | |
2392 | case MINUS: | |
2393 | case SYMBOL_REF: | |
2394 | case LABEL_REF: | |
2395 | output_addr_const (file, op); | |
2396 | break; | |
2397 | ||
2398 | default: | |
2399 | print_rtl (file, op); | |
2400 | break; | |
2401 | } | |
2402 | } | |
2403 | ||
9b52871c | 2404 | #undef TARGET_PRINT_OPERAND_ADDRESS |
2405 | #define TARGET_PRINT_OPERAND_ADDRESS msp430_print_operand_addr | |
2406 | ||
2407 | /* Output to stdio stream FILE the assembler syntax for an | |
2408 | instruction operand that is a memory reference whose address | |
2409 | is ADDR. */ | |
2410 | ||
2411 | static void | |
2412 | msp430_print_operand_addr (FILE * file, rtx addr) | |
2413 | { | |
2414 | switch (GET_CODE (addr)) | |
2415 | { | |
2416 | case PLUS: | |
2417 | msp430_print_operand_raw (file, XEXP (addr, 1)); | |
2418 | gcc_assert (REG_P (XEXP (addr, 0))); | |
2419 | fprintf (file, "(%s)", reg_names [REGNO (XEXP (addr, 0))]); | |
2420 | return; | |
2421 | ||
2422 | case REG: | |
2423 | fprintf (file, "@"); | |
2424 | break; | |
2425 | ||
2426 | case CONST: | |
2427 | case CONST_INT: | |
2428 | case SYMBOL_REF: | |
2429 | case LABEL_REF: | |
2430 | fprintf (file, "&"); | |
2431 | break; | |
2432 | ||
2433 | default: | |
2434 | break; | |
2435 | } | |
2436 | ||
2437 | msp430_print_operand_raw (file, addr); | |
2438 | } | |
2439 | ||
2440 | #undef TARGET_PRINT_OPERAND | |
2441 | #define TARGET_PRINT_OPERAND msp430_print_operand | |
2442 | ||
b2cc50a9 | 2443 | /* A low 16-bits of int/lower of register pair |
2444 | B high 16-bits of int/higher of register pair | |
2445 | C bits 32-47 of a 64-bit value/reg 3 of a DImode value | |
2446 | D bits 48-63 of a 64-bit value/reg 4 of a DImode value | |
2447 | H like %B (for backwards compatibility) | |
2448 | I inverse of value | |
50753af6 | 2449 | J an integer without a # prefix |
b2cc50a9 | 2450 | L like %A (for backwards compatibility) |
2451 | O offset of the top of the stack | |
2452 | Q like X but generates an A postfix | |
2453 | R inverse of condition code, unsigned. | |
2454 | X X instruction postfix in large mode | |
2455 | Y value - 4 | |
2456 | Z value - 1 | |
2457 | b .B or .W or .A, depending upon the mode | |
2458 | p bit position | |
2459 | r inverse of condition code | |
2460 | x like X but only for pointers. */ | |
2461 | ||
e4a25868 | 2462 | static void |
2463 | msp430_print_operand (FILE * file, rtx op, int letter) | |
2464 | { | |
2465 | rtx addr; | |
2466 | ||
2467 | /* We can't use c, n, a, or l. */ | |
2468 | switch (letter) | |
2469 | { | |
2470 | case 'Z': | |
2471 | gcc_assert (CONST_INT_P (op)); | |
2472 | /* Print the constant value, less one. */ | |
2473 | fprintf (file, "#%ld", INTVAL (op) - 1); | |
2474 | return; | |
2475 | case 'Y': | |
2476 | gcc_assert (CONST_INT_P (op)); | |
2477 | /* Print the constant value, less four. */ | |
2478 | fprintf (file, "#%ld", INTVAL (op) - 4); | |
2479 | return; | |
e4a25868 | 2480 | case 'I': |
2481 | if (GET_CODE (op) == CONST_INT) | |
2482 | { | |
2483 | /* Inverse of constants */ | |
2484 | int i = INTVAL (op); | |
2485 | fprintf (file, "%d", ~i); | |
2486 | return; | |
2487 | } | |
2488 | op = XEXP (op, 0); | |
2489 | break; | |
2490 | case 'r': /* Conditional jump where the condition is reversed. */ | |
2491 | switch (GET_CODE (op)) | |
2492 | { | |
2493 | case EQ: fprintf (file, "NE"); break; | |
2494 | case NE: fprintf (file, "EQ"); break; | |
2495 | case GEU: fprintf (file, "LO"); break; | |
2496 | case LTU: fprintf (file, "HS"); break; | |
2497 | case GE: fprintf (file, "L"); break; | |
2498 | case LT: fprintf (file, "GE"); break; | |
2499 | /* Assume these have reversed operands. */ | |
2500 | case GTU: fprintf (file, "HS"); break; | |
2501 | case LEU: fprintf (file, "LO"); break; | |
2502 | case GT: fprintf (file, "GE"); break; | |
2503 | case LE: fprintf (file, "L"); break; | |
2504 | default: | |
9b52871c | 2505 | msp430_print_operand_raw (file, op); |
e4a25868 | 2506 | break; |
2507 | } | |
2508 | return; | |
2509 | case 'R': /* Conditional jump where the operands are reversed. */ | |
2510 | switch (GET_CODE (op)) | |
2511 | { | |
2512 | case GTU: fprintf (file, "LO"); break; | |
2513 | case LEU: fprintf (file, "HS"); break; | |
2514 | case GT: fprintf (file, "L"); break; | |
2515 | case LE: fprintf (file, "GE"); break; | |
2516 | default: | |
9b52871c | 2517 | msp430_print_operand_raw (file, op); |
e4a25868 | 2518 | break; |
2519 | } | |
2520 | return; | |
2521 | case 'p': /* Bit position. 0 == 0x01, 3 = 0x08 etc. */ | |
2522 | gcc_assert (CONST_INT_P (op)); | |
2523 | fprintf (file, "#%d", 1 << INTVAL (op)); | |
2524 | return; | |
b2cc50a9 | 2525 | case 'b': |
e4a25868 | 2526 | switch (GET_MODE (op)) |
2527 | { | |
2528 | case QImode: fprintf (file, ".B"); return; | |
2529 | case HImode: fprintf (file, ".W"); return; | |
2530 | case PSImode: fprintf (file, ".A"); return; | |
2531 | case SImode: fprintf (file, ".A"); return; | |
2532 | default: | |
2533 | return; | |
2534 | } | |
b2cc50a9 | 2535 | case 'A': |
e4a25868 | 2536 | case 'L': /* Low half. */ |
2537 | switch (GET_CODE (op)) | |
2538 | { | |
2539 | case MEM: | |
2540 | op = adjust_address (op, Pmode, 0); | |
2541 | break; | |
2542 | case REG: | |
2543 | break; | |
2544 | case CONST_INT: | |
2545 | op = GEN_INT (INTVAL (op) & 0xffff); | |
2546 | letter = 0; | |
2547 | break; | |
2548 | default: | |
2549 | /* If you get here, figure out a test case :-) */ | |
2550 | gcc_unreachable (); | |
2551 | } | |
2552 | break; | |
b2cc50a9 | 2553 | case 'B': |
e4a25868 | 2554 | case 'H': /* high half */ |
2555 | switch (GET_CODE (op)) | |
2556 | { | |
2557 | case MEM: | |
2558 | op = adjust_address (op, Pmode, 2); | |
2559 | break; | |
2560 | case REG: | |
2561 | op = gen_rtx_REG (Pmode, REGNO (op) + 1); | |
2562 | break; | |
2563 | case CONST_INT: | |
2564 | op = GEN_INT (INTVAL (op) >> 16); | |
2565 | letter = 0; | |
2566 | break; | |
2567 | default: | |
2568 | /* If you get here, figure out a test case :-) */ | |
2569 | gcc_unreachable (); | |
2570 | } | |
2571 | break; | |
b2cc50a9 | 2572 | case 'C': |
2573 | switch (GET_CODE (op)) | |
2574 | { | |
2575 | case MEM: | |
2576 | op = adjust_address (op, Pmode, 3); | |
2577 | break; | |
2578 | case REG: | |
2579 | op = gen_rtx_REG (Pmode, REGNO (op) + 2); | |
2580 | break; | |
2581 | case CONST_INT: | |
6956ee35 | 2582 | op = GEN_INT ((long long) INTVAL (op) >> 32); |
b2cc50a9 | 2583 | letter = 0; |
2584 | break; | |
2585 | default: | |
2586 | /* If you get here, figure out a test case :-) */ | |
2587 | gcc_unreachable (); | |
2588 | } | |
2589 | break; | |
2590 | case 'D': | |
2591 | switch (GET_CODE (op)) | |
2592 | { | |
2593 | case MEM: | |
2594 | op = adjust_address (op, Pmode, 4); | |
2595 | break; | |
2596 | case REG: | |
2597 | op = gen_rtx_REG (Pmode, REGNO (op) + 3); | |
2598 | break; | |
2599 | case CONST_INT: | |
6956ee35 | 2600 | op = GEN_INT ((long long) INTVAL (op) >> 48); |
b2cc50a9 | 2601 | letter = 0; |
2602 | break; | |
2603 | default: | |
2604 | /* If you get here, figure out a test case :-) */ | |
2605 | gcc_unreachable (); | |
2606 | } | |
2607 | break; | |
e4a25868 | 2608 | |
2609 | case 'X': | |
2610 | /* This is used to turn, for example, an ADD opcode into an ADDX | |
2611 | opcode when we're using 20-bit addresses. */ | |
f6bba390 | 2612 | if (TARGET_LARGE || GET_MODE (op) == PSImode) |
e4a25868 | 2613 | fprintf (file, "X"); |
2614 | /* We don't care which operand we use, but we want 'X' in the MD | |
2615 | file, so we do it this way. */ | |
2616 | return; | |
2617 | ||
2618 | case 'x': | |
2619 | /* Similarly, but only for PSImodes. BIC, for example, needs this. */ | |
d16d2561 | 2620 | if (GET_MODE (op) == PSImode) |
e4a25868 | 2621 | fprintf (file, "X"); |
2622 | return; | |
2623 | ||
b2cc50a9 | 2624 | case 'Q': |
e4a25868 | 2625 | /* Likewise, for BR -> BRA. */ |
2626 | if (TARGET_LARGE) | |
2627 | fprintf (file, "A"); | |
2628 | return; | |
62b2ccbe | 2629 | |
2630 | case 'O': | |
2631 | /* Computes the offset to the top of the stack for the current frame. | |
2632 | This has to be done here rather than in, say, msp430_expand_builtin() | |
2633 | because builtins are expanded before the frame layout is determined. */ | |
2634 | fprintf (file, "%d", | |
2635 | msp430_initial_elimination_offset (ARG_POINTER_REGNUM, STACK_POINTER_REGNUM) | |
c0b06633 | 2636 | - (TARGET_LARGE ? 4 : 2)); |
9b52871c | 2637 | return; |
b2cc50a9 | 2638 | |
50753af6 | 2639 | case 'J': |
2640 | gcc_assert (GET_CODE (op) == CONST_INT); | |
b2cc50a9 | 2641 | case 0: |
2642 | break; | |
2643 | default: | |
2644 | output_operand_lossage ("invalid operand prefix"); | |
2645 | return; | |
e4a25868 | 2646 | } |
2647 | ||
2648 | switch (GET_CODE (op)) | |
2649 | { | |
2650 | case REG: | |
9b52871c | 2651 | msp430_print_operand_raw (file, op); |
e4a25868 | 2652 | break; |
2653 | ||
2654 | case MEM: | |
2655 | addr = XEXP (op, 0); | |
9b52871c | 2656 | msp430_print_operand_addr (file, addr); |
e4a25868 | 2657 | break; |
2658 | ||
e4a25868 | 2659 | case CONST: |
58f45145 | 2660 | if (GET_CODE (XEXP (op, 0)) == ZERO_EXTRACT) |
2661 | { | |
2662 | op = XEXP (op, 0); | |
2663 | switch (INTVAL (XEXP (op, 2))) | |
2664 | { | |
2665 | case 0: | |
2666 | fprintf (file, "#lo ("); | |
2667 | msp430_print_operand_raw (file, XEXP (op, 0)); | |
2668 | fprintf (file, ")"); | |
2669 | break; | |
2670 | ||
2671 | case 16: | |
2672 | fprintf (file, "#hi ("); | |
2673 | msp430_print_operand_raw (file, XEXP (op, 0)); | |
2674 | fprintf (file, ")"); | |
2675 | break; | |
2676 | ||
2677 | default: | |
2678 | output_operand_lossage ("invalid zero extract"); | |
2679 | break; | |
2680 | } | |
2681 | break; | |
2682 | } | |
2683 | /* Fall through. */ | |
2684 | case CONST_INT: | |
e4a25868 | 2685 | case SYMBOL_REF: |
2686 | case LABEL_REF: | |
2687 | if (letter == 0) | |
2688 | fprintf (file, "#"); | |
9b52871c | 2689 | msp430_print_operand_raw (file, op); |
e4a25868 | 2690 | break; |
2691 | ||
2692 | case EQ: fprintf (file, "EQ"); break; | |
2693 | case NE: fprintf (file, "NE"); break; | |
2694 | case GEU: fprintf (file, "HS"); break; | |
2695 | case LTU: fprintf (file, "LO"); break; | |
2696 | case GE: fprintf (file, "GE"); break; | |
2697 | case LT: fprintf (file, "L"); break; | |
2698 | ||
2699 | default: | |
2700 | print_rtl (file, op); | |
2701 | break; | |
2702 | } | |
e4a25868 | 2703 | } |
2704 | ||
2705 | \f | |
2706 | /* Frame stuff. */ | |
2707 | ||
2708 | rtx | |
2709 | msp430_return_addr_rtx (int count) | |
2710 | { | |
2711 | int ra_size; | |
2712 | if (count) | |
2713 | return NULL_RTX; | |
2714 | ||
2715 | ra_size = TARGET_LARGE ? 4 : 2; | |
2716 | if (crtl->args.pretend_args_size) | |
2717 | ra_size += 2; | |
2718 | ||
2719 | return gen_rtx_MEM (Pmode, gen_rtx_PLUS (Pmode, arg_pointer_rtx, GEN_INT (- ra_size))); | |
2720 | } | |
2721 | ||
2722 | rtx | |
2723 | msp430_incoming_return_addr_rtx (void) | |
2724 | { | |
2725 | return gen_rtx_MEM (Pmode, stack_pointer_rtx); | |
2726 | } | |
2727 | \f | |
2728 | /* Instruction generation stuff. */ | |
2729 | ||
2730 | /* Generate a sequence of instructions to sign-extend an HI | |
2731 | value into an SI value. Handles the tricky case where | |
2732 | we are overwriting the destination. */ | |
2733 | ||
2734 | const char * | |
2735 | msp430x_extendhisi (rtx * operands) | |
2736 | { | |
2737 | if (REGNO (operands[0]) == REGNO (operands[1])) | |
2738 | /* Low word of dest == source word. */ | |
abe1609f | 2739 | return "BIT.W\t#0x8000, %L0 { SUBC.W\t%H0, %H0 { INV.W\t%H0, %H0"; /* 8-bytes. */ |
e4a25868 | 2740 | |
2741 | if (! msp430x) | |
2742 | /* Note: This sequence is approximately the same length as invoking a helper | |
2743 | function to perform the sign-extension, as in: | |
6956ee35 | 2744 | |
e4a25868 | 2745 | MOV.W %1, %L0 |
2746 | MOV.W %1, r12 | |
2747 | CALL __mspabi_srai_15 | |
2748 | MOV.W r12, %H0 | |
2749 | ||
2750 | but this version does not involve any function calls or using argument | |
2751 | registers, so it reduces register pressure. */ | |
abe1609f | 2752 | return "MOV.W\t%1, %L0 { BIT.W\t#0x8000, %L0 { SUBC.W\t%H0, %H0 { INV.W\t%H0, %H0"; /* 10-bytes. */ |
6956ee35 | 2753 | |
e4a25868 | 2754 | if (REGNO (operands[0]) + 1 == REGNO (operands[1])) |
2755 | /* High word of dest == source word. */ | |
abe1609f | 2756 | return "MOV.W\t%1, %L0 { RPT\t#15 { RRAX.W\t%H0"; /* 6-bytes. */ |
e4a25868 | 2757 | |
2758 | /* No overlap between dest and source. */ | |
abe1609f | 2759 | return "MOV.W\t%1, %L0 { MOV.W\t%1, %H0 { RPT\t#15 { RRAX.W\t%H0"; /* 8-bytes. */ |
e4a25868 | 2760 | } |
2761 | ||
2762 | /* Likewise for logical right shifts. */ | |
2763 | const char * | |
2764 | msp430x_logical_shift_right (rtx amount) | |
2765 | { | |
2766 | /* The MSP430X's logical right shift instruction - RRUM - does | |
2767 | not use an extension word, so we cannot encode a repeat count. | |
2768 | Try various alternatives to work around this. If the count | |
2769 | is in a register we are stuck, hence the assert. */ | |
2770 | gcc_assert (CONST_INT_P (amount)); | |
2771 | ||
2772 | if (INTVAL (amount) <= 0 | |
2773 | || INTVAL (amount) >= 16) | |
2774 | return "# nop logical shift."; | |
2775 | ||
6956ee35 | 2776 | if (INTVAL (amount) > 0 |
e4a25868 | 2777 | && INTVAL (amount) < 5) |
2778 | return "rrum.w\t%2, %0"; /* Two bytes. */ | |
2779 | ||
6956ee35 | 2780 | if (INTVAL (amount) > 4 |
e4a25868 | 2781 | && INTVAL (amount) < 9) |
2782 | return "rrum.w\t#4, %0 { rrum.w\t%Y2, %0 "; /* Four bytes. */ | |
2783 | ||
2784 | /* First we logically shift right by one. Now we know | |
2785 | that the top bit is zero and we can use the arithmetic | |
2786 | right shift instruction to perform the rest of the shift. */ | |
2787 | return "rrum.w\t#1, %0 { rpt\t%Z2 { rrax.w\t%0"; /* Six bytes. */ | |
2788 | } | |
2789 | \f | |
2790 | struct gcc_target targetm = TARGET_INITIALIZER; | |
2791 | ||
2792 | #include "gt-msp430.h" |