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1a94ca49 | 1 | /* Definitions of target machine for GNU compiler, for DEC Alpha. |
9ddd9abd | 2 | Copyright (C) 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, |
2f83c7d6 | 3 | 2000, 2001, 2002, 2004, 2005, 2007 Free Software Foundation, Inc. |
1e6c6f11 | 4 | Contributed by Richard Kenner (kenner@vlsi1.ultra.nyu.edu) |
1a94ca49 | 5 | |
7ec022b2 | 6 | This file is part of GCC. |
1a94ca49 | 7 | |
7ec022b2 | 8 | GCC is free software; you can redistribute it and/or modify |
1a94ca49 | 9 | it under the terms of the GNU General Public License as published by |
2f83c7d6 | 10 | the Free Software Foundation; either version 3, or (at your option) |
1a94ca49 RK |
11 | any later version. |
12 | ||
7ec022b2 | 13 | GCC is distributed in the hope that it will be useful, |
1a94ca49 RK |
14 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | GNU General Public License for more details. | |
17 | ||
18 | You should have received a copy of the GNU General Public License | |
2f83c7d6 NC |
19 | along with GCC; see the file COPYING3. If not see |
20 | <http://www.gnu.org/licenses/>. */ | |
1a94ca49 | 21 | |
12a41c22 NB |
22 | /* Target CPU builtins. */ |
23 | #define TARGET_CPU_CPP_BUILTINS() \ | |
24 | do \ | |
25 | { \ | |
26 | builtin_define ("__alpha"); \ | |
27 | builtin_define ("__alpha__"); \ | |
28 | builtin_assert ("cpu=alpha"); \ | |
29 | builtin_assert ("machine=alpha"); \ | |
30 | if (TARGET_CIX) \ | |
31 | { \ | |
32 | builtin_define ("__alpha_cix__"); \ | |
33 | builtin_assert ("cpu=cix"); \ | |
34 | } \ | |
35 | if (TARGET_FIX) \ | |
36 | { \ | |
37 | builtin_define ("__alpha_fix__"); \ | |
38 | builtin_assert ("cpu=fix"); \ | |
39 | } \ | |
40 | if (TARGET_BWX) \ | |
41 | { \ | |
42 | builtin_define ("__alpha_bwx__"); \ | |
43 | builtin_assert ("cpu=bwx"); \ | |
44 | } \ | |
45 | if (TARGET_MAX) \ | |
46 | { \ | |
47 | builtin_define ("__alpha_max__"); \ | |
48 | builtin_assert ("cpu=max"); \ | |
49 | } \ | |
8bea7f7c | 50 | if (alpha_cpu == PROCESSOR_EV6) \ |
12a41c22 NB |
51 | { \ |
52 | builtin_define ("__alpha_ev6__"); \ | |
53 | builtin_assert ("cpu=ev6"); \ | |
54 | } \ | |
8bea7f7c | 55 | else if (alpha_cpu == PROCESSOR_EV5) \ |
12a41c22 NB |
56 | { \ |
57 | builtin_define ("__alpha_ev5__"); \ | |
58 | builtin_assert ("cpu=ev5"); \ | |
59 | } \ | |
60 | else /* Presumably ev4. */ \ | |
61 | { \ | |
62 | builtin_define ("__alpha_ev4__"); \ | |
63 | builtin_assert ("cpu=ev4"); \ | |
64 | } \ | |
ac9cfada | 65 | if (TARGET_IEEE || TARGET_IEEE_WITH_INEXACT) \ |
f9ee10ab | 66 | builtin_define ("_IEEE_FP"); \ |
ac9cfada | 67 | if (TARGET_IEEE_WITH_INEXACT) \ |
f9ee10ab | 68 | builtin_define ("_IEEE_FP_INEXACT"); \ |
0f15adbd RH |
69 | if (TARGET_LONG_DOUBLE_128) \ |
70 | builtin_define ("__LONG_DOUBLE_128__"); \ | |
e0322d5c NB |
71 | \ |
72 | /* Macros dependent on the C dialect. */ \ | |
55f49e3d | 73 | SUBTARGET_LANGUAGE_CPP_BUILTINS(); \ |
ac9cfada | 74 | } while (0) |
1a94ca49 | 75 | |
55f49e3d JT |
76 | #ifndef SUBTARGET_LANGUAGE_CPP_BUILTINS |
77 | #define SUBTARGET_LANGUAGE_CPP_BUILTINS() \ | |
78 | do \ | |
79 | { \ | |
80 | if (preprocessing_asm_p ()) \ | |
81 | builtin_define_std ("LANGUAGE_ASSEMBLY"); \ | |
04df6730 | 82 | else if (c_dialect_cxx ()) \ |
55f49e3d JT |
83 | { \ |
84 | builtin_define ("__LANGUAGE_C_PLUS_PLUS"); \ | |
85 | builtin_define ("__LANGUAGE_C_PLUS_PLUS__"); \ | |
86 | } \ | |
04df6730 NB |
87 | else \ |
88 | builtin_define_std ("LANGUAGE_C"); \ | |
89 | if (c_dialect_objc ()) \ | |
55f49e3d JT |
90 | { \ |
91 | builtin_define ("__LANGUAGE_OBJECTIVE_C"); \ | |
92 | builtin_define ("__LANGUAGE_OBJECTIVE_C__"); \ | |
93 | } \ | |
94 | } \ | |
95 | while (0) | |
96 | #endif | |
97 | ||
b890f297 | 98 | #define WORD_SWITCH_TAKES_ARG(STR) \ |
2efe55c1 | 99 | (!strcmp (STR, "rpath") || DEFAULT_WORD_SWITCH_TAKES_ARG(STR)) |
8877eb00 | 100 | |
1a94ca49 RK |
101 | /* Print subsidiary information on the compiler version in use. */ |
102 | #define TARGET_VERSION | |
103 | ||
1a94ca49 RK |
104 | /* Run-time compilation parameters selecting different hardware subsets. */ |
105 | ||
f6f6a13c RK |
106 | /* Which processor to schedule for. The cpu attribute defines a list that |
107 | mirrors this list, so changes to alpha.md must be made at the same time. */ | |
108 | ||
109 | enum processor_type | |
3c50106f RH |
110 | { |
111 | PROCESSOR_EV4, /* 2106[46]{a,} */ | |
e9a25f70 | 112 | PROCESSOR_EV5, /* 21164{a,pc,} */ |
3c50106f RH |
113 | PROCESSOR_EV6, /* 21264 */ |
114 | PROCESSOR_MAX | |
115 | }; | |
f6f6a13c RK |
116 | |
117 | extern enum processor_type alpha_cpu; | |
8bea7f7c | 118 | extern enum processor_type alpha_tune; |
f6f6a13c | 119 | |
2bf6230d RK |
120 | enum alpha_trap_precision |
121 | { | |
122 | ALPHA_TP_PROG, /* No precision (default). */ | |
123 | ALPHA_TP_FUNC, /* Trap contained within originating function. */ | |
285a5742 | 124 | ALPHA_TP_INSN /* Instruction accuracy and code is resumption safe. */ |
2bf6230d RK |
125 | }; |
126 | ||
127 | enum alpha_fp_rounding_mode | |
128 | { | |
129 | ALPHA_FPRM_NORM, /* Normal rounding mode. */ | |
130 | ALPHA_FPRM_MINF, /* Round towards minus-infinity. */ | |
285a5742 | 131 | ALPHA_FPRM_CHOP, /* Chopped rounding mode (towards 0). */ |
2bf6230d RK |
132 | ALPHA_FPRM_DYN /* Dynamic rounding mode. */ |
133 | }; | |
134 | ||
135 | enum alpha_fp_trap_mode | |
136 | { | |
285a5742 | 137 | ALPHA_FPTM_N, /* Normal trap mode. */ |
2bf6230d RK |
138 | ALPHA_FPTM_U, /* Underflow traps enabled. */ |
139 | ALPHA_FPTM_SU, /* Software completion, w/underflow traps */ | |
140 | ALPHA_FPTM_SUI /* Software completion, w/underflow & inexact traps */ | |
141 | }; | |
142 | ||
1a94ca49 RK |
143 | extern int target_flags; |
144 | ||
2bf6230d RK |
145 | extern enum alpha_trap_precision alpha_tp; |
146 | extern enum alpha_fp_rounding_mode alpha_fprm; | |
147 | extern enum alpha_fp_trap_mode alpha_fptm; | |
148 | ||
8bea7f7c RH |
149 | /* Invert the easy way to make options work. */ |
150 | #define TARGET_FP (!TARGET_SOFT_FP) | |
8f87939b | 151 | |
9ba3994a | 152 | /* These are for target os support and cannot be changed at runtime. */ |
be7b80f4 RH |
153 | #define TARGET_ABI_WINDOWS_NT 0 |
154 | #define TARGET_ABI_OPEN_VMS 0 | |
30102605 RH |
155 | #define TARGET_ABI_UNICOSMK 0 |
156 | #define TARGET_ABI_OSF (!TARGET_ABI_WINDOWS_NT \ | |
157 | && !TARGET_ABI_OPEN_VMS \ | |
158 | && !TARGET_ABI_UNICOSMK) | |
9ba3994a RH |
159 | |
160 | #ifndef TARGET_AS_CAN_SUBTRACT_LABELS | |
161 | #define TARGET_AS_CAN_SUBTRACT_LABELS TARGET_GAS | |
162 | #endif | |
30102605 RH |
163 | #ifndef TARGET_AS_SLASH_BEFORE_SUFFIX |
164 | #define TARGET_AS_SLASH_BEFORE_SUFFIX TARGET_GAS | |
165 | #endif | |
9c0e94a5 RH |
166 | #ifndef TARGET_CAN_FAULT_IN_PROLOGUE |
167 | #define TARGET_CAN_FAULT_IN_PROLOGUE 0 | |
168 | #endif | |
5495cc55 | 169 | #ifndef TARGET_HAS_XFLOATING_LIBS |
0f15adbd | 170 | #define TARGET_HAS_XFLOATING_LIBS TARGET_LONG_DOUBLE_128 |
5495cc55 | 171 | #endif |
4f1c5cce RH |
172 | #ifndef TARGET_PROFILING_NEEDS_GP |
173 | #define TARGET_PROFILING_NEEDS_GP 0 | |
174 | #endif | |
ccb83cbc RH |
175 | #ifndef TARGET_LD_BUGGY_LDGP |
176 | #define TARGET_LD_BUGGY_LDGP 0 | |
177 | #endif | |
14291bc7 RH |
178 | #ifndef TARGET_FIXUP_EV5_PREFETCH |
179 | #define TARGET_FIXUP_EV5_PREFETCH 0 | |
180 | #endif | |
6f9b006d RH |
181 | #ifndef HAVE_AS_TLS |
182 | #define HAVE_AS_TLS 0 | |
183 | #endif | |
9ba3994a | 184 | |
8bea7f7c | 185 | #define TARGET_DEFAULT MASK_FPREGS |
1a94ca49 | 186 | |
88681624 ILT |
187 | #ifndef TARGET_CPU_DEFAULT |
188 | #define TARGET_CPU_DEFAULT 0 | |
189 | #endif | |
190 | ||
3a37b08e RH |
191 | #ifndef TARGET_DEFAULT_EXPLICIT_RELOCS |
192 | #ifdef HAVE_AS_EXPLICIT_RELOCS | |
193 | #define TARGET_DEFAULT_EXPLICIT_RELOCS MASK_EXPLICIT_RELOCS | |
8bea7f7c | 194 | #define TARGET_SUPPORT_ARCH 1 |
3a37b08e RH |
195 | #else |
196 | #define TARGET_DEFAULT_EXPLICIT_RELOCS 0 | |
197 | #endif | |
198 | #endif | |
199 | ||
8bea7f7c RH |
200 | #ifndef TARGET_SUPPORT_ARCH |
201 | #define TARGET_SUPPORT_ARCH 0 | |
202 | #endif | |
2bf6230d | 203 | |
7816bea0 DJ |
204 | /* Support for a compile-time default CPU, et cetera. The rules are: |
205 | --with-cpu is ignored if -mcpu is specified. | |
206 | --with-tune is ignored if -mtune is specified. */ | |
207 | #define OPTION_DEFAULT_SPECS \ | |
208 | {"cpu", "%{!mcpu=*:-mcpu=%(VALUE)}" }, \ | |
209 | {"tune", "%{!mtune=*:-mtune=%(VALUE)}" } | |
210 | ||
2bf6230d RK |
211 | /* Sometimes certain combinations of command options do not make sense |
212 | on a particular target machine. You can define a macro | |
213 | `OVERRIDE_OPTIONS' to take account of this. This macro, if | |
214 | defined, is executed once just after all the command options have | |
215 | been parsed. | |
216 | ||
217 | On the Alpha, it is used to translate target-option strings into | |
218 | numeric values. */ | |
219 | ||
2bf6230d RK |
220 | #define OVERRIDE_OPTIONS override_options () |
221 | ||
222 | ||
1a94ca49 RK |
223 | /* Define this macro to change register usage conditional on target flags. |
224 | ||
225 | On the Alpha, we use this to disable the floating-point registers when | |
226 | they don't exist. */ | |
227 | ||
e9e4208a WC |
228 | #define CONDITIONAL_REGISTER_USAGE \ |
229 | { \ | |
230 | int i; \ | |
231 | if (! TARGET_FPREGS) \ | |
232 | for (i = 32; i < 63; i++) \ | |
233 | fixed_regs[i] = call_used_regs[i] = 1; \ | |
234 | } | |
235 | ||
1a94ca49 | 236 | |
4f074454 RK |
237 | /* Show we can debug even without a frame pointer. */ |
238 | #define CAN_DEBUG_WITHOUT_FP | |
1a94ca49 RK |
239 | \f |
240 | /* target machine storage layout */ | |
241 | ||
242 | /* Define the size of `int'. The default is the same as the word size. */ | |
243 | #define INT_TYPE_SIZE 32 | |
244 | ||
245 | /* Define the size of `long long'. The default is the twice the word size. */ | |
246 | #define LONG_LONG_TYPE_SIZE 64 | |
247 | ||
3dc85dfb RH |
248 | /* We're IEEE unless someone says to use VAX. */ |
249 | #define TARGET_FLOAT_FORMAT \ | |
250 | (TARGET_FLOAT_VAX ? VAX_FLOAT_FORMAT : IEEE_FLOAT_FORMAT) | |
251 | ||
1a94ca49 RK |
252 | /* The two floating-point formats we support are S-floating, which is |
253 | 4 bytes, and T-floating, which is 8 bytes. `float' is S and `double' | |
254 | and `long double' are T. */ | |
255 | ||
256 | #define FLOAT_TYPE_SIZE 32 | |
257 | #define DOUBLE_TYPE_SIZE 64 | |
0f15adbd RH |
258 | #define LONG_DOUBLE_TYPE_SIZE (TARGET_LONG_DOUBLE_128 ? 128 : 64) |
259 | ||
260 | /* Define this to set long double type size to use in libgcc2.c, which can | |
261 | not depend on target_flags. */ | |
262 | #ifdef __LONG_DOUBLE_128__ | |
263 | #define LIBGCC2_LONG_DOUBLE_TYPE_SIZE 128 | |
264 | #else | |
265 | #define LIBGCC2_LONG_DOUBLE_TYPE_SIZE 64 | |
266 | #endif | |
267 | ||
268 | /* Work around target_flags dependency in ada/targtyps.c. */ | |
269 | #define WIDEST_HARDWARE_FP_SIZE 64 | |
1a94ca49 | 270 | |
5258d7ae RK |
271 | #define WCHAR_TYPE "unsigned int" |
272 | #define WCHAR_TYPE_SIZE 32 | |
1a94ca49 | 273 | |
13d39dbc | 274 | /* Define this macro if it is advisable to hold scalars in registers |
f676971a | 275 | in a wider mode than that declared by the program. In such cases, |
1a94ca49 RK |
276 | the value is constrained to be within the bounds of the declared |
277 | type, but kept valid in the wider mode. The signedness of the | |
278 | extension may differ from that of the type. | |
279 | ||
06d69cd3 RH |
280 | For Alpha, we always store objects in a full register. 32-bit integers |
281 | are always sign-extended, but smaller objects retain their signedness. | |
282 | ||
283 | Note that small vector types can get mapped onto integer modes at the | |
284 | whim of not appearing in alpha-modes.def. We never promoted these | |
c112cf2b | 285 | values before; don't do so now that we've trimmed the set of modes to |
06d69cd3 RH |
286 | those actually implemented in the backend. */ |
287 | ||
288 | #define PROMOTE_MODE(MODE,UNSIGNEDP,TYPE) \ | |
289 | if (GET_MODE_CLASS (MODE) == MODE_INT \ | |
290 | && (TYPE == NULL || TREE_CODE (TYPE) != VECTOR_TYPE) \ | |
291 | && GET_MODE_SIZE (MODE) < UNITS_PER_WORD) \ | |
292 | { \ | |
293 | if ((MODE) == SImode) \ | |
294 | (UNSIGNEDP) = 0; \ | |
295 | (MODE) = DImode; \ | |
1a94ca49 RK |
296 | } |
297 | ||
1a94ca49 RK |
298 | /* Define this if most significant bit is lowest numbered |
299 | in instructions that operate on numbered bit-fields. | |
300 | ||
301 | There are no such instructions on the Alpha, but the documentation | |
302 | is little endian. */ | |
303 | #define BITS_BIG_ENDIAN 0 | |
304 | ||
305 | /* Define this if most significant byte of a word is the lowest numbered. | |
306 | This is false on the Alpha. */ | |
307 | #define BYTES_BIG_ENDIAN 0 | |
308 | ||
309 | /* Define this if most significant word of a multiword number is lowest | |
310 | numbered. | |
311 | ||
312 | For Alpha we can decide arbitrarily since there are no machine instructions | |
285a5742 | 313 | for them. Might as well be consistent with bytes. */ |
1a94ca49 RK |
314 | #define WORDS_BIG_ENDIAN 0 |
315 | ||
1a94ca49 RK |
316 | /* Width of a word, in units (bytes). */ |
317 | #define UNITS_PER_WORD 8 | |
318 | ||
319 | /* Width in bits of a pointer. | |
320 | See also the macro `Pmode' defined below. */ | |
321 | #define POINTER_SIZE 64 | |
322 | ||
323 | /* Allocation boundary (in *bits*) for storing arguments in argument list. */ | |
324 | #define PARM_BOUNDARY 64 | |
325 | ||
326 | /* Boundary (in *bits*) on which stack pointer should be aligned. */ | |
e5e10fb4 | 327 | #define STACK_BOUNDARY 128 |
1a94ca49 RK |
328 | |
329 | /* Allocation boundary (in *bits*) for the code of a function. */ | |
c176c051 | 330 | #define FUNCTION_BOUNDARY 32 |
1a94ca49 RK |
331 | |
332 | /* Alignment of field after `int : 0' in a structure. */ | |
333 | #define EMPTY_FIELD_BOUNDARY 64 | |
334 | ||
335 | /* Every structure's size must be a multiple of this. */ | |
336 | #define STRUCTURE_SIZE_BOUNDARY 8 | |
337 | ||
43a88a8c | 338 | /* A bit-field declared as `int' forces `int' alignment for the struct. */ |
1a94ca49 RK |
339 | #define PCC_BITFIELD_TYPE_MATTERS 1 |
340 | ||
1a94ca49 | 341 | /* No data type wants to be aligned rounder than this. */ |
5495cc55 | 342 | #define BIGGEST_ALIGNMENT 128 |
1a94ca49 | 343 | |
d16fe557 RK |
344 | /* For atomic access to objects, must have at least 32-bit alignment |
345 | unless the machine has byte operations. */ | |
13eb1f7f | 346 | #define MINIMUM_ATOMIC_ALIGNMENT ((unsigned int) (TARGET_BWX ? 8 : 32)) |
d16fe557 | 347 | |
442b1685 RK |
348 | /* Align all constants and variables to at least a word boundary so |
349 | we can pick up pieces of them faster. */ | |
6c174fc0 RH |
350 | /* ??? Only if block-move stuff knows about different source/destination |
351 | alignment. */ | |
352 | #if 0 | |
442b1685 RK |
353 | #define CONSTANT_ALIGNMENT(EXP, ALIGN) MAX ((ALIGN), BITS_PER_WORD) |
354 | #define DATA_ALIGNMENT(EXP, ALIGN) MAX ((ALIGN), BITS_PER_WORD) | |
6c174fc0 | 355 | #endif |
1a94ca49 | 356 | |
825dda42 | 357 | /* Set this nonzero if move instructions will actually fail to work |
1a94ca49 RK |
358 | when given unaligned data. |
359 | ||
360 | Since we get an error message when we do one, call them invalid. */ | |
361 | ||
362 | #define STRICT_ALIGNMENT 1 | |
363 | ||
825dda42 | 364 | /* Set this nonzero if unaligned move instructions are extremely slow. |
1a94ca49 RK |
365 | |
366 | On the Alpha, they trap. */ | |
130d2d72 | 367 | |
e1565e65 | 368 | #define SLOW_UNALIGNED_ACCESS(MODE, ALIGN) 1 |
e2ea71ea | 369 | |
1a94ca49 RK |
370 | /* Standard register usage. */ |
371 | ||
372 | /* Number of actual hardware registers. | |
373 | The hardware registers are assigned numbers for the compiler | |
374 | from 0 to just below FIRST_PSEUDO_REGISTER. | |
375 | All registers that the compiler knows about must be given numbers, | |
376 | even those that are not normally considered general registers. | |
377 | ||
378 | We define all 32 integer registers, even though $31 is always zero, | |
379 | and all 32 floating-point registers, even though $f31 is also | |
380 | always zero. We do not bother defining the FP status register and | |
f676971a | 381 | there are no other registers. |
130d2d72 RK |
382 | |
383 | Since $31 is always zero, we will use register number 31 as the | |
384 | argument pointer. It will never appear in the generated code | |
385 | because we will always be eliminating it in favor of the stack | |
52a69200 RK |
386 | pointer or hardware frame pointer. |
387 | ||
388 | Likewise, we use $f31 for the frame pointer, which will always | |
389 | be eliminated in favor of the hardware frame pointer or the | |
390 | stack pointer. */ | |
1a94ca49 RK |
391 | |
392 | #define FIRST_PSEUDO_REGISTER 64 | |
393 | ||
394 | /* 1 for registers that have pervasive standard uses | |
395 | and are not available for the register allocator. */ | |
396 | ||
397 | #define FIXED_REGISTERS \ | |
398 | {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \ | |
399 | 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, \ | |
400 | 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \ | |
401 | 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1 } | |
402 | ||
403 | /* 1 for registers not available across function calls. | |
404 | These must include the FIXED_REGISTERS and also any | |
405 | registers that can be used without being saved. | |
406 | The latter must include the registers where values are returned | |
407 | and the register where structure-value addresses are passed. | |
408 | Aside from that, you can include as many other registers as you like. */ | |
409 | #define CALL_USED_REGISTERS \ | |
410 | {1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, \ | |
411 | 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 1, 1, 1, 1, 1, \ | |
412 | 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, \ | |
413 | 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1 } | |
414 | ||
415 | /* List the order in which to allocate registers. Each register must be | |
ad5d827d RH |
416 | listed once, even those in FIXED_REGISTERS. */ |
417 | ||
418 | #define REG_ALLOC_ORDER { \ | |
419 | 1, 2, 3, 4, 5, 6, 7, 8, /* nonsaved integer registers */ \ | |
420 | 22, 23, 24, 25, 28, /* likewise */ \ | |
421 | 0, /* likewise, but return value */ \ | |
422 | 21, 20, 19, 18, 17, 16, /* likewise, but input args */ \ | |
423 | 27, /* likewise, but OSF procedure value */ \ | |
424 | \ | |
425 | 42, 43, 44, 45, 46, 47, /* nonsaved floating-point registers */ \ | |
426 | 54, 55, 56, 57, 58, 59, /* likewise */ \ | |
427 | 60, 61, 62, /* likewise */ \ | |
428 | 32, 33, /* likewise, but return values */ \ | |
429 | 53, 52, 51, 50, 49, 48, /* likewise, but input args */ \ | |
430 | \ | |
431 | 9, 10, 11, 12, 13, 14, /* saved integer registers */ \ | |
432 | 26, /* return address */ \ | |
433 | 15, /* hard frame pointer */ \ | |
434 | \ | |
435 | 34, 35, 36, 37, 38, 39, /* saved floating-point registers */ \ | |
436 | 40, 41, /* likewise */ \ | |
437 | \ | |
438 | 29, 30, 31, 63 /* gp, sp, ap, sfp */ \ | |
439 | } | |
1a94ca49 RK |
440 | |
441 | /* Return number of consecutive hard regs needed starting at reg REGNO | |
442 | to hold something of mode MODE. | |
443 | This is ordinarily the length in words of a value of mode MODE | |
444 | but can be less for certain modes in special long registers. */ | |
445 | ||
446 | #define HARD_REGNO_NREGS(REGNO, MODE) \ | |
447 | ((GET_MODE_SIZE (MODE) + UNITS_PER_WORD - 1) / UNITS_PER_WORD) | |
448 | ||
449 | /* Value is 1 if hard register REGNO can hold a value of machine-mode MODE. | |
450 | On Alpha, the integer registers can hold any mode. The floating-point | |
5c9948f4 | 451 | registers can hold 64-bit integers as well, but not smaller values. */ |
1a94ca49 | 452 | |
e6a8ebb4 RH |
453 | #define HARD_REGNO_MODE_OK(REGNO, MODE) \ |
454 | ((REGNO) >= 32 && (REGNO) <= 62 \ | |
5c9948f4 | 455 | ? (MODE) == SFmode || (MODE) == DFmode || (MODE) == DImode \ |
d416c0b3 | 456 | || (MODE) == SCmode || (MODE) == DCmode \ |
e6a8ebb4 RH |
457 | : 1) |
458 | ||
459 | /* A C expression that is nonzero if a value of mode | |
460 | MODE1 is accessible in mode MODE2 without copying. | |
1a94ca49 | 461 | |
e6a8ebb4 RH |
462 | This asymmetric test is true when MODE1 could be put |
463 | in an FP register but MODE2 could not. */ | |
1a94ca49 | 464 | |
a7adf08e | 465 | #define MODES_TIEABLE_P(MODE1, MODE2) \ |
e6a8ebb4 RH |
466 | (HARD_REGNO_MODE_OK (32, (MODE1)) \ |
467 | ? HARD_REGNO_MODE_OK (32, (MODE2)) \ | |
a7adf08e | 468 | : 1) |
1a94ca49 RK |
469 | |
470 | /* Specify the registers used for certain standard purposes. | |
471 | The values of these macros are register numbers. */ | |
472 | ||
473 | /* Alpha pc isn't overloaded on a register that the compiler knows about. */ | |
474 | /* #define PC_REGNUM */ | |
475 | ||
476 | /* Register to use for pushing function arguments. */ | |
477 | #define STACK_POINTER_REGNUM 30 | |
478 | ||
479 | /* Base register for access to local variables of the function. */ | |
52a69200 | 480 | #define HARD_FRAME_POINTER_REGNUM 15 |
1a94ca49 RK |
481 | |
482 | /* Value should be nonzero if functions must have frame pointers. | |
483 | Zero means the frame pointer need not be set up (and parms | |
484 | may be accessed via the stack pointer) in functions that seem suitable. | |
485 | This is computed in `reload', in reload1.c. */ | |
486 | #define FRAME_POINTER_REQUIRED 0 | |
487 | ||
488 | /* Base register for access to arguments of the function. */ | |
130d2d72 | 489 | #define ARG_POINTER_REGNUM 31 |
1a94ca49 | 490 | |
52a69200 RK |
491 | /* Base register for access to local variables of function. */ |
492 | #define FRAME_POINTER_REGNUM 63 | |
493 | ||
f676971a | 494 | /* Register in which static-chain is passed to a function. |
1a94ca49 RK |
495 | |
496 | For the Alpha, this is based on an example; the calling sequence | |
497 | doesn't seem to specify this. */ | |
498 | #define STATIC_CHAIN_REGNUM 1 | |
499 | ||
133d3133 RH |
500 | /* The register number of the register used to address a table of |
501 | static data addresses in memory. */ | |
502 | #define PIC_OFFSET_TABLE_REGNUM 29 | |
503 | ||
504 | /* Define this macro if the register defined by `PIC_OFFSET_TABLE_REGNUM' | |
505 | is clobbered by calls. */ | |
506 | /* ??? It is and it isn't. It's required to be valid for a given | |
507 | function when the function returns. It isn't clobbered by | |
508 | current_file functions. Moreover, we do not expose the ldgp | |
509 | until after reload, so we're probably safe. */ | |
510 | /* #define PIC_OFFSET_TABLE_REG_CALL_CLOBBERED */ | |
1a94ca49 RK |
511 | \f |
512 | /* Define the classes of registers for register constraints in the | |
513 | machine description. Also define ranges of constants. | |
514 | ||
515 | One of the classes must always be named ALL_REGS and include all hard regs. | |
516 | If there is more than one class, another class must be named NO_REGS | |
517 | and contain no registers. | |
518 | ||
519 | The name GENERAL_REGS must be the name of a class (or an alias for | |
520 | another name such as ALL_REGS). This is the class of registers | |
521 | that is allowed by "g" or "r" in a register constraint. | |
522 | Also, registers outside this class are allocated only when | |
523 | instructions express preferences for them. | |
524 | ||
525 | The classes must be numbered in nondecreasing order; that is, | |
526 | a larger-numbered class must never be contained completely | |
527 | in a smaller-numbered class. | |
528 | ||
529 | For any two classes, it is very desirable that there be another | |
530 | class that represents their union. */ | |
f676971a | 531 | |
b73c0bc8 | 532 | enum reg_class { |
6f9b006d | 533 | NO_REGS, R0_REG, R24_REG, R25_REG, R27_REG, |
b73c0bc8 RH |
534 | GENERAL_REGS, FLOAT_REGS, ALL_REGS, |
535 | LIM_REG_CLASSES | |
536 | }; | |
1a94ca49 RK |
537 | |
538 | #define N_REG_CLASSES (int) LIM_REG_CLASSES | |
539 | ||
285a5742 | 540 | /* Give names of register classes as strings for dump file. */ |
1a94ca49 | 541 | |
6f9b006d RH |
542 | #define REG_CLASS_NAMES \ |
543 | {"NO_REGS", "R0_REG", "R24_REG", "R25_REG", "R27_REG", \ | |
b73c0bc8 | 544 | "GENERAL_REGS", "FLOAT_REGS", "ALL_REGS" } |
1a94ca49 RK |
545 | |
546 | /* Define which registers fit in which classes. | |
547 | This is an initializer for a vector of HARD_REG_SET | |
548 | of length N_REG_CLASSES. */ | |
549 | ||
b73c0bc8 RH |
550 | #define REG_CLASS_CONTENTS \ |
551 | { {0x00000000, 0x00000000}, /* NO_REGS */ \ | |
6f9b006d | 552 | {0x00000001, 0x00000000}, /* R0_REG */ \ |
b73c0bc8 RH |
553 | {0x01000000, 0x00000000}, /* R24_REG */ \ |
554 | {0x02000000, 0x00000000}, /* R25_REG */ \ | |
555 | {0x08000000, 0x00000000}, /* R27_REG */ \ | |
556 | {0xffffffff, 0x80000000}, /* GENERAL_REGS */ \ | |
557 | {0x00000000, 0x7fffffff}, /* FLOAT_REGS */ \ | |
558 | {0xffffffff, 0xffffffff} } | |
1a94ca49 RK |
559 | |
560 | /* The same information, inverted: | |
561 | Return the class number of the smallest class containing | |
562 | reg number REGNO. This could be a conditional expression | |
563 | or could index an array. */ | |
564 | ||
93c89ab3 | 565 | #define REGNO_REG_CLASS(REGNO) \ |
6f9b006d RH |
566 | ((REGNO) == 0 ? R0_REG \ |
567 | : (REGNO) == 24 ? R24_REG \ | |
b73c0bc8 RH |
568 | : (REGNO) == 25 ? R25_REG \ |
569 | : (REGNO) == 27 ? R27_REG \ | |
93c89ab3 RH |
570 | : (REGNO) >= 32 && (REGNO) <= 62 ? FLOAT_REGS \ |
571 | : GENERAL_REGS) | |
1a94ca49 RK |
572 | |
573 | /* The class value for index registers, and the one for base regs. */ | |
574 | #define INDEX_REG_CLASS NO_REGS | |
575 | #define BASE_REG_CLASS GENERAL_REGS | |
576 | ||
1a94ca49 RK |
577 | /* Given an rtx X being reloaded into a reg required to be |
578 | in class CLASS, return the class of reg to actually use. | |
579 | In general this is just CLASS; but on some machines | |
551cc6fd | 580 | in some cases it is preferable to use a more restrictive class. */ |
1a94ca49 | 581 | |
551cc6fd | 582 | #define PREFERRED_RELOAD_CLASS alpha_preferred_reload_class |
1a94ca49 | 583 | |
1a94ca49 | 584 | /* If we are copying between general and FP registers, we need a memory |
de4abb91 | 585 | location unless the FIX extension is available. */ |
1a94ca49 | 586 | |
e9a25f70 | 587 | #define SECONDARY_MEMORY_NEEDED(CLASS1,CLASS2,MODE) \ |
bfd82dbf RK |
588 | (! TARGET_FIX && (((CLASS1) == FLOAT_REGS && (CLASS2) != FLOAT_REGS) \ |
589 | || ((CLASS2) == FLOAT_REGS && (CLASS1) != FLOAT_REGS))) | |
1a94ca49 | 590 | |
acd94aaf RK |
591 | /* Specify the mode to be used for memory when a secondary memory |
592 | location is needed. If MODE is floating-point, use it. Otherwise, | |
593 | widen to a word like the default. This is needed because we always | |
594 | store integers in FP registers in quadword format. This whole | |
595 | area is very tricky! */ | |
596 | #define SECONDARY_MEMORY_NEEDED_MODE(MODE) \ | |
597 | (GET_MODE_CLASS (MODE) == MODE_FLOAT ? (MODE) \ | |
e868b518 | 598 | : GET_MODE_SIZE (MODE) >= 4 ? (MODE) \ |
acd94aaf RK |
599 | : mode_for_size (BITS_PER_WORD, GET_MODE_CLASS (MODE), 0)) |
600 | ||
1a94ca49 RK |
601 | /* Return the maximum number of consecutive registers |
602 | needed to represent mode MODE in a register of class CLASS. */ | |
603 | ||
604 | #define CLASS_MAX_NREGS(CLASS, MODE) \ | |
605 | ((GET_MODE_SIZE (MODE) + UNITS_PER_WORD - 1) / UNITS_PER_WORD) | |
606 | ||
cff9f8d5 | 607 | /* Return the class of registers that cannot change mode from FROM to TO. */ |
c31dfe4d | 608 | |
b0c42aed JH |
609 | #define CANNOT_CHANGE_MODE_CLASS(FROM, TO, CLASS) \ |
610 | (GET_MODE_SIZE (FROM) != GET_MODE_SIZE (TO) \ | |
611 | ? reg_classes_intersect_p (FLOAT_REGS, CLASS) : 0) | |
c31dfe4d | 612 | |
1a94ca49 | 613 | /* Define the cost of moving between registers of various classes. Moving |
f676971a | 614 | between FLOAT_REGS and anything else except float regs is expensive. |
1a94ca49 RK |
615 | In fact, we make it quite expensive because we really don't want to |
616 | do these moves unless it is clearly worth it. Optimizations may | |
617 | reduce the impact of not being able to allocate a pseudo to a | |
618 | hard register. */ | |
619 | ||
72910a0b RH |
620 | #define REGISTER_MOVE_COST(MODE, CLASS1, CLASS2) \ |
621 | (((CLASS1) == FLOAT_REGS) == ((CLASS2) == FLOAT_REGS) ? 2 \ | |
622 | : TARGET_FIX ? ((CLASS1) == FLOAT_REGS ? 6 : 8) \ | |
623 | : 4+2*alpha_memory_latency) | |
1a94ca49 RK |
624 | |
625 | /* A C expressions returning the cost of moving data of MODE from a register to | |
626 | or from memory. | |
627 | ||
628 | On the Alpha, bump this up a bit. */ | |
629 | ||
bcbbac26 | 630 | extern int alpha_memory_latency; |
cbd5b9a2 | 631 | #define MEMORY_MOVE_COST(MODE,CLASS,IN) (2*alpha_memory_latency) |
1a94ca49 RK |
632 | |
633 | /* Provide the cost of a branch. Exact meaning under development. */ | |
634 | #define BRANCH_COST 5 | |
1a94ca49 RK |
635 | \f |
636 | /* Stack layout; function entry, exit and calling. */ | |
637 | ||
638 | /* Define this if pushing a word on the stack | |
639 | makes the stack pointer a smaller address. */ | |
640 | #define STACK_GROWS_DOWNWARD | |
641 | ||
a4d05547 | 642 | /* Define this to nonzero if the nominal address of the stack frame |
1a94ca49 RK |
643 | is at the high-address end of the local variables; |
644 | that is, each additional local variable allocated | |
645 | goes at a more negative offset in the frame. */ | |
f62c8a5c | 646 | /* #define FRAME_GROWS_DOWNWARD 0 */ |
1a94ca49 RK |
647 | |
648 | /* Offset within stack frame to start allocating local variables at. | |
649 | If FRAME_GROWS_DOWNWARD, this is the offset to the END of the | |
650 | first local allocated. Otherwise, it is the offset to the BEGINNING | |
651 | of the first local allocated. */ | |
652 | ||
52a69200 | 653 | #define STARTING_FRAME_OFFSET 0 |
1a94ca49 RK |
654 | |
655 | /* If we generate an insn to push BYTES bytes, | |
656 | this says how many the stack pointer really advances by. | |
657 | On Alpha, don't define this because there are no push insns. */ | |
658 | /* #define PUSH_ROUNDING(BYTES) */ | |
659 | ||
e008606e RK |
660 | /* Define this to be nonzero if stack checking is built into the ABI. */ |
661 | #define STACK_CHECK_BUILTIN 1 | |
662 | ||
1a94ca49 RK |
663 | /* Define this if the maximum size of all the outgoing args is to be |
664 | accumulated and pushed during the prologue. The amount can be | |
665 | found in the variable current_function_outgoing_args_size. */ | |
f73ad30e | 666 | #define ACCUMULATE_OUTGOING_ARGS 1 |
1a94ca49 RK |
667 | |
668 | /* Offset of first parameter from the argument pointer register value. */ | |
669 | ||
130d2d72 | 670 | #define FIRST_PARM_OFFSET(FNDECL) 0 |
1a94ca49 RK |
671 | |
672 | /* Definitions for register eliminations. | |
673 | ||
978e8952 | 674 | We have two registers that can be eliminated on the Alpha. First, the |
1a94ca49 | 675 | frame pointer register can often be eliminated in favor of the stack |
130d2d72 | 676 | pointer register. Secondly, the argument pointer register can always be |
285a5742 | 677 | eliminated; it is replaced with either the stack or frame pointer. */ |
1a94ca49 RK |
678 | |
679 | /* This is an array of structures. Each structure initializes one pair | |
680 | of eliminable registers. The "from" register number is given first, | |
681 | followed by "to". Eliminations of the same "from" register are listed | |
682 | in order of preference. */ | |
683 | ||
52a69200 RK |
684 | #define ELIMINABLE_REGS \ |
685 | {{ ARG_POINTER_REGNUM, STACK_POINTER_REGNUM}, \ | |
686 | { ARG_POINTER_REGNUM, HARD_FRAME_POINTER_REGNUM}, \ | |
687 | { FRAME_POINTER_REGNUM, STACK_POINTER_REGNUM}, \ | |
688 | { FRAME_POINTER_REGNUM, HARD_FRAME_POINTER_REGNUM}} | |
1a94ca49 RK |
689 | |
690 | /* Given FROM and TO register numbers, say whether this elimination is allowed. | |
691 | Frame pointer elimination is automatically handled. | |
692 | ||
130d2d72 | 693 | All eliminations are valid since the cases where FP can't be |
1a94ca49 RK |
694 | eliminated are already handled. */ |
695 | ||
130d2d72 | 696 | #define CAN_ELIMINATE(FROM, TO) 1 |
1a94ca49 | 697 | |
52a69200 RK |
698 | /* Round up to a multiple of 16 bytes. */ |
699 | #define ALPHA_ROUND(X) (((X) + 15) & ~ 15) | |
700 | ||
1a94ca49 RK |
701 | /* Define the offset between two registers, one to be eliminated, and the other |
702 | its replacement, at the start of a routine. */ | |
35d9c403 RH |
703 | #define INITIAL_ELIMINATION_OFFSET(FROM, TO, OFFSET) \ |
704 | ((OFFSET) = alpha_initial_elimination_offset(FROM, TO)) | |
1a94ca49 RK |
705 | |
706 | /* Define this if stack space is still allocated for a parameter passed | |
707 | in a register. */ | |
708 | /* #define REG_PARM_STACK_SPACE */ | |
709 | ||
710 | /* Value is the number of bytes of arguments automatically | |
711 | popped when returning from a subroutine call. | |
8b109b37 | 712 | FUNDECL is the declaration node of the function (as a tree), |
1a94ca49 RK |
713 | FUNTYPE is the data type of the function (as a tree), |
714 | or for a library call it is an identifier node for the subroutine name. | |
715 | SIZE is the number of bytes of arguments passed on the stack. */ | |
716 | ||
8b109b37 | 717 | #define RETURN_POPS_ARGS(FUNDECL,FUNTYPE,SIZE) 0 |
1a94ca49 RK |
718 | |
719 | /* Define how to find the value returned by a function. | |
720 | VALTYPE is the data type of the value (as a tree). | |
721 | If the precise function being called is known, FUNC is its FUNCTION_DECL; | |
722 | otherwise, FUNC is 0. | |
723 | ||
724 | On Alpha the value is found in $0 for integer functions and | |
725 | $f0 for floating-point functions. */ | |
726 | ||
7e4fb06a RH |
727 | #define FUNCTION_VALUE(VALTYPE, FUNC) \ |
728 | function_value (VALTYPE, FUNC, VOIDmode) | |
1a94ca49 RK |
729 | |
730 | /* Define how to find the value returned by a library function | |
731 | assuming the value has mode MODE. */ | |
732 | ||
7e4fb06a RH |
733 | #define LIBCALL_VALUE(MODE) \ |
734 | function_value (NULL, NULL, MODE) | |
1a94ca49 RK |
735 | |
736 | /* 1 if N is a possible register number for a function value | |
737 | as seen by the caller. */ | |
738 | ||
e5958492 RK |
739 | #define FUNCTION_VALUE_REGNO_P(N) \ |
740 | ((N) == 0 || (N) == 1 || (N) == 32 || (N) == 33) | |
1a94ca49 RK |
741 | |
742 | /* 1 if N is a possible register number for function argument passing. | |
743 | On Alpha, these are $16-$21 and $f16-$f21. */ | |
744 | ||
745 | #define FUNCTION_ARG_REGNO_P(N) \ | |
746 | (((N) >= 16 && (N) <= 21) || ((N) >= 16 + 32 && (N) <= 21 + 32)) | |
747 | \f | |
748 | /* Define a data type for recording info about an argument list | |
749 | during the scan of that argument list. This data type should | |
750 | hold all necessary information about the function itself | |
751 | and about the args processed so far, enough to enable macros | |
752 | such as FUNCTION_ARG to determine where the next arg should go. | |
753 | ||
754 | On Alpha, this is a single integer, which is a number of words | |
755 | of arguments scanned so far. | |
756 | Thus 6 or more means all following args should go on the stack. */ | |
757 | ||
758 | #define CUMULATIVE_ARGS int | |
759 | ||
760 | /* Initialize a variable CUM of type CUMULATIVE_ARGS | |
761 | for a call to a function whose data type is FNTYPE. | |
762 | For a library call, FNTYPE is 0. */ | |
763 | ||
0f6937fe AM |
764 | #define INIT_CUMULATIVE_ARGS(CUM, FNTYPE, LIBNAME, INDIRECT, N_NAMED_ARGS) \ |
765 | (CUM) = 0 | |
1a94ca49 RK |
766 | |
767 | /* Define intermediate macro to compute the size (in registers) of an argument | |
768 | for the Alpha. */ | |
769 | ||
770 | #define ALPHA_ARG_SIZE(MODE, TYPE, NAMED) \ | |
5495cc55 RH |
771 | ((MODE) == TFmode || (MODE) == TCmode ? 1 \ |
772 | : (((MODE) == BLKmode ? int_size_in_bytes (TYPE) : GET_MODE_SIZE (MODE)) \ | |
773 | + (UNITS_PER_WORD - 1)) / UNITS_PER_WORD) | |
1a94ca49 RK |
774 | |
775 | /* Update the data in CUM to advance over an argument | |
776 | of mode MODE and data type TYPE. | |
777 | (TYPE is null for libcalls where that information may not be available.) */ | |
778 | ||
779 | #define FUNCTION_ARG_ADVANCE(CUM, MODE, TYPE, NAMED) \ | |
fe984136 RH |
780 | ((CUM) += \ |
781 | (targetm.calls.must_pass_in_stack (MODE, TYPE)) \ | |
782 | ? 6 : ALPHA_ARG_SIZE (MODE, TYPE, NAMED)) | |
1a94ca49 RK |
783 | |
784 | /* Determine where to put an argument to a function. | |
785 | Value is zero to push the argument on the stack, | |
786 | or a hard register in which to store the argument. | |
787 | ||
788 | MODE is the argument's machine mode. | |
789 | TYPE is the data type of the argument (as a tree). | |
790 | This is null for libcalls where that information may | |
791 | not be available. | |
792 | CUM is a variable of type CUMULATIVE_ARGS which gives info about | |
793 | the preceding args and about the function being called. | |
794 | NAMED is nonzero if this argument is a named parameter | |
795 | (otherwise it is an extra parameter matching an ellipsis). | |
796 | ||
797 | On Alpha the first 6 words of args are normally in registers | |
798 | and the rest are pushed. */ | |
799 | ||
800 | #define FUNCTION_ARG(CUM, MODE, TYPE, NAMED) \ | |
5495cc55 RH |
801 | function_arg((CUM), (MODE), (TYPE), (NAMED)) |
802 | ||
c8e9adec RK |
803 | /* Try to output insns to set TARGET equal to the constant C if it can be |
804 | done in less than N insns. Do all computations in MODE. Returns the place | |
805 | where the output has been placed if it can be done and the insns have been | |
806 | emitted. If it would take more than N insns, zero is returned and no | |
807 | insns and emitted. */ | |
92e40a7a | 808 | |
1a94ca49 RK |
809 | /* Define the information needed to generate branch and scc insns. This is |
810 | stored from the compare operation. Note that we can't use "rtx" here | |
811 | since it hasn't been defined! */ | |
812 | ||
6db21c7f RH |
813 | struct alpha_compare |
814 | { | |
815 | struct rtx_def *op0, *op1; | |
816 | int fp_p; | |
817 | }; | |
818 | ||
819 | extern struct alpha_compare alpha_compare; | |
1a94ca49 | 820 | |
e5958492 | 821 | /* Make (or fake) .linkage entry for function call. |
e5958492 | 822 | IS_LOCAL is 0 if name is used in call, 1 if name is used in definition. */ |
e5958492 | 823 | |
bcbbac26 RH |
824 | /* This macro defines the start of an assembly comment. */ |
825 | ||
826 | #define ASM_COMMENT_START " #" | |
827 | ||
acd92049 | 828 | /* This macro produces the initial definition of a function. */ |
1a94ca49 | 829 | |
acd92049 RH |
830 | #define ASM_DECLARE_FUNCTION_NAME(FILE,NAME,DECL) \ |
831 | alpha_start_function(FILE,NAME,DECL); | |
1a94ca49 | 832 | |
acd92049 | 833 | /* This macro closes up a function definition for the assembler. */ |
9c0e94a5 | 834 | |
acd92049 RH |
835 | #define ASM_DECLARE_FUNCTION_SIZE(FILE,NAME,DECL) \ |
836 | alpha_end_function(FILE,NAME,DECL) | |
f676971a | 837 | |
acd92049 RH |
838 | /* Output any profiling code before the prologue. */ |
839 | ||
840 | #define PROFILE_BEFORE_PROLOGUE 1 | |
841 | ||
fbadafbc RH |
842 | /* Never use profile counters. */ |
843 | ||
844 | #define NO_PROFILE_COUNTERS 1 | |
845 | ||
1a94ca49 | 846 | /* Output assembler code to FILE to increment profiler label # LABELNO |
e0fb9029 | 847 | for profiling a function entry. Under OSF/1, profiling is enabled |
ddd5a7c1 | 848 | by simply passing -pg to the assembler and linker. */ |
85d159a3 | 849 | |
e0fb9029 | 850 | #define FUNCTION_PROFILER(FILE, LABELNO) |
85d159a3 | 851 | |
1a94ca49 RK |
852 | /* EXIT_IGNORE_STACK should be nonzero if, when returning from a function, |
853 | the stack pointer does not matter. The value is tested only in | |
854 | functions that have frame pointers. | |
855 | No definition is equivalent to always zero. */ | |
856 | ||
857 | #define EXIT_IGNORE_STACK 1 | |
c112e233 RH |
858 | |
859 | /* Define registers used by the epilogue and return instruction. */ | |
860 | ||
861 | #define EPILOGUE_USES(REGNO) ((REGNO) == 26) | |
1a94ca49 RK |
862 | \f |
863 | /* Output assembler code for a block containing the constant parts | |
864 | of a trampoline, leaving space for the variable parts. | |
865 | ||
866 | The trampoline should set the static chain pointer to value placed | |
f676971a | 867 | into the trampoline and should branch to the specified routine. |
7981384f | 868 | Note that $27 has been set to the address of the trampoline, so we can |
30864e14 | 869 | use it for addressability of the two data items. */ |
1a94ca49 RK |
870 | |
871 | #define TRAMPOLINE_TEMPLATE(FILE) \ | |
c714f03d | 872 | do { \ |
7981384f | 873 | fprintf (FILE, "\tldq $1,24($27)\n"); \ |
1a94ca49 | 874 | fprintf (FILE, "\tldq $27,16($27)\n"); \ |
7981384f RK |
875 | fprintf (FILE, "\tjmp $31,($27),0\n"); \ |
876 | fprintf (FILE, "\tnop\n"); \ | |
1a94ca49 | 877 | fprintf (FILE, "\t.quad 0,0\n"); \ |
c714f03d | 878 | } while (0) |
1a94ca49 | 879 | |
3a523eeb RS |
880 | /* Section in which to place the trampoline. On Alpha, instructions |
881 | may only be placed in a text segment. */ | |
882 | ||
883 | #define TRAMPOLINE_SECTION text_section | |
884 | ||
1a94ca49 RK |
885 | /* Length in units of the trampoline for entering a nested function. */ |
886 | ||
7981384f | 887 | #define TRAMPOLINE_SIZE 32 |
1a94ca49 | 888 | |
30864e14 RH |
889 | /* The alignment of a trampoline, in bits. */ |
890 | ||
891 | #define TRAMPOLINE_ALIGNMENT 64 | |
892 | ||
1a94ca49 RK |
893 | /* Emit RTL insns to initialize the variable parts of a trampoline. |
894 | FNADDR is an RTX for the address of the function's pure code. | |
c714f03d | 895 | CXT is an RTX for the static chain value for the function. */ |
1a94ca49 | 896 | |
9ec36da5 | 897 | #define INITIALIZE_TRAMPOLINE(TRAMP, FNADDR, CXT) \ |
c714f03d | 898 | alpha_initialize_trampoline (TRAMP, FNADDR, CXT, 16, 24, 8) |
675f0e7c RK |
899 | |
900 | /* A C expression whose value is RTL representing the value of the return | |
901 | address for the frame COUNT steps up from the current frame. | |
902 | FRAMEADDR is the frame pointer of the COUNT frame, or the frame pointer of | |
952fc2ed | 903 | the COUNT-1 frame if RETURN_ADDR_IN_PREVIOUS_FRAME is defined. */ |
675f0e7c | 904 | |
9ecc37f0 | 905 | #define RETURN_ADDR_RTX alpha_return_addr |
9ecc37f0 | 906 | |
285a5742 | 907 | /* Before the prologue, RA lives in $26. */ |
6abc6f40 | 908 | #define INCOMING_RETURN_ADDR_RTX gen_rtx_REG (Pmode, 26) |
8034da37 | 909 | #define DWARF_FRAME_RETURN_COLUMN DWARF_FRAME_REGNUM (26) |
ed80cd68 | 910 | #define DWARF_ALT_FRAME_RETURN_COLUMN DWARF_FRAME_REGNUM (64) |
282efe1c | 911 | #define DWARF_ZERO_REG 31 |
4573b4de RH |
912 | |
913 | /* Describe how we implement __builtin_eh_return. */ | |
914 | #define EH_RETURN_DATA_REGNO(N) ((N) < 4 ? (N) + 16 : INVALID_REGNUM) | |
915 | #define EH_RETURN_STACKADJ_RTX gen_rtx_REG (Pmode, 28) | |
916 | #define EH_RETURN_HANDLER_RTX \ | |
917 | gen_rtx_MEM (Pmode, plus_constant (stack_pointer_rtx, \ | |
918 | current_function_outgoing_args_size)) | |
675f0e7c | 919 | \f |
1a94ca49 RK |
920 | /* Addressing modes, and classification of registers for them. */ |
921 | ||
1a94ca49 RK |
922 | /* Macros to check register numbers against specific register classes. */ |
923 | ||
924 | /* These assume that REGNO is a hard or pseudo reg number. | |
925 | They give nonzero only if REGNO is a hard reg of the suitable class | |
926 | or a pseudo reg currently allocated to a suitable hard reg. | |
927 | Since they use reg_renumber, they are safe only once reg_renumber | |
928 | has been allocated, which happens in local-alloc.c. */ | |
929 | ||
930 | #define REGNO_OK_FOR_INDEX_P(REGNO) 0 | |
931 | #define REGNO_OK_FOR_BASE_P(REGNO) \ | |
52a69200 RK |
932 | ((REGNO) < 32 || (unsigned) reg_renumber[REGNO] < 32 \ |
933 | || (REGNO) == 63 || reg_renumber[REGNO] == 63) | |
1a94ca49 RK |
934 | \f |
935 | /* Maximum number of registers that can appear in a valid memory address. */ | |
936 | #define MAX_REGS_PER_ADDRESS 1 | |
937 | ||
938 | /* Recognize any constant value that is a valid address. For the Alpha, | |
939 | there are only constants none since we want to use LDA to load any | |
940 | symbolic addresses into registers. */ | |
941 | ||
942 | #define CONSTANT_ADDRESS_P(X) \ | |
943 | (GET_CODE (X) == CONST_INT \ | |
944 | && (unsigned HOST_WIDE_INT) (INTVAL (X) + 0x8000) < 0x10000) | |
945 | ||
946 | /* Include all constant integers and constant doubles, but not | |
947 | floating-point, except for floating-point zero. */ | |
948 | ||
72910a0b | 949 | #define LEGITIMATE_CONSTANT_P alpha_legitimate_constant_p |
1a94ca49 RK |
950 | |
951 | /* The macros REG_OK_FOR..._P assume that the arg is a REG rtx | |
952 | and check its validity for a certain class. | |
953 | We have two alternate definitions for each of them. | |
954 | The usual definition accepts all pseudo regs; the other rejects | |
955 | them unless they have been allocated suitable hard regs. | |
956 | The symbol REG_OK_STRICT causes the latter definition to be used. | |
957 | ||
958 | Most source files want to accept pseudo regs in the hope that | |
959 | they will get allocated to the class that the insn wants them to be in. | |
960 | Source files for reload pass need to be strict. | |
961 | After reload, it makes no difference, since pseudo regs have | |
962 | been eliminated by then. */ | |
963 | ||
1a94ca49 RK |
964 | /* Nonzero if X is a hard reg that can be used as an index |
965 | or if it is a pseudo reg. */ | |
966 | #define REG_OK_FOR_INDEX_P(X) 0 | |
5d02b6c2 | 967 | |
1a94ca49 RK |
968 | /* Nonzero if X is a hard reg that can be used as a base reg |
969 | or if it is a pseudo reg. */ | |
a39bdefc | 970 | #define NONSTRICT_REG_OK_FOR_BASE_P(X) \ |
52a69200 | 971 | (REGNO (X) < 32 || REGNO (X) == 63 || REGNO (X) >= FIRST_PSEUDO_REGISTER) |
1a94ca49 | 972 | |
5d02b6c2 RH |
973 | /* ??? Nonzero if X is the frame pointer, or some virtual register |
974 | that may eliminate to the frame pointer. These will be allowed to | |
975 | have offsets greater than 32K. This is done because register | |
976 | elimination offsets will change the hi/lo split, and if we split | |
285a5742 | 977 | before reload, we will require additional instructions. */ |
a39bdefc | 978 | #define NONSTRICT_REG_OK_FP_BASE_P(X) \ |
5d02b6c2 RH |
979 | (REGNO (X) == 31 || REGNO (X) == 63 \ |
980 | || (REGNO (X) >= FIRST_PSEUDO_REGISTER \ | |
981 | && REGNO (X) < LAST_VIRTUAL_REGISTER)) | |
982 | ||
1a94ca49 | 983 | /* Nonzero if X is a hard reg that can be used as a base reg. */ |
a39bdefc | 984 | #define STRICT_REG_OK_FOR_BASE_P(X) REGNO_OK_FOR_BASE_P (REGNO (X)) |
5d02b6c2 | 985 | |
a39bdefc RH |
986 | #ifdef REG_OK_STRICT |
987 | #define REG_OK_FOR_BASE_P(X) STRICT_REG_OK_FOR_BASE_P (X) | |
988 | #else | |
989 | #define REG_OK_FOR_BASE_P(X) NONSTRICT_REG_OK_FOR_BASE_P (X) | |
1a94ca49 RK |
990 | #endif |
991 | \f | |
a39bdefc RH |
992 | /* GO_IF_LEGITIMATE_ADDRESS recognizes an RTL expression that is a |
993 | valid memory address for an instruction. */ | |
1a94ca49 | 994 | |
a39bdefc RH |
995 | #ifdef REG_OK_STRICT |
996 | #define GO_IF_LEGITIMATE_ADDRESS(MODE, X, WIN) \ | |
997 | do { \ | |
998 | if (alpha_legitimate_address_p (MODE, X, 1)) \ | |
999 | goto WIN; \ | |
1000 | } while (0) | |
1001 | #else | |
1002 | #define GO_IF_LEGITIMATE_ADDRESS(MODE, X, WIN) \ | |
1003 | do { \ | |
1004 | if (alpha_legitimate_address_p (MODE, X, 0)) \ | |
1005 | goto WIN; \ | |
1006 | } while (0) | |
1007 | #endif | |
1a94ca49 RK |
1008 | |
1009 | /* Try machine-dependent ways of modifying an illegitimate address | |
1010 | to be legitimate. If we find one, return the new, valid address. | |
a39bdefc | 1011 | This macro is used in only one place: `memory_address' in explow.c. */ |
aead1ca3 | 1012 | |
551cc6fd RH |
1013 | #define LEGITIMIZE_ADDRESS(X,OLDX,MODE,WIN) \ |
1014 | do { \ | |
1015 | rtx new_x = alpha_legitimize_address (X, NULL_RTX, MODE); \ | |
1016 | if (new_x) \ | |
1017 | { \ | |
1018 | X = new_x; \ | |
1019 | goto WIN; \ | |
1020 | } \ | |
aead1ca3 | 1021 | } while (0) |
1a94ca49 | 1022 | |
a9a2595b JR |
1023 | /* Try a machine-dependent way of reloading an illegitimate address |
1024 | operand. If we find one, push the reload and jump to WIN. This | |
aead1ca3 | 1025 | macro is used in only one place: `find_reloads_address' in reload.c. */ |
f676971a | 1026 | |
aead1ca3 RH |
1027 | #define LEGITIMIZE_RELOAD_ADDRESS(X,MODE,OPNUM,TYPE,IND_L,WIN) \ |
1028 | do { \ | |
1029 | rtx new_x = alpha_legitimize_reload_address (X, MODE, OPNUM, TYPE, IND_L); \ | |
1030 | if (new_x) \ | |
1031 | { \ | |
1032 | X = new_x; \ | |
1033 | goto WIN; \ | |
1034 | } \ | |
a9a2595b JR |
1035 | } while (0) |
1036 | ||
1a94ca49 RK |
1037 | /* Go to LABEL if ADDR (a legitimate address expression) |
1038 | has an effect that depends on the machine mode it is used for. | |
1039 | On the Alpha this is true only for the unaligned modes. We can | |
1040 | simplify this test since we know that the address must be valid. */ | |
1041 | ||
1042 | #define GO_IF_MODE_DEPENDENT_ADDRESS(ADDR,LABEL) \ | |
1043 | { if (GET_CODE (ADDR) == AND) goto LABEL; } | |
1a94ca49 RK |
1044 | \f |
1045 | /* Specify the machine mode that this machine uses | |
1046 | for the index in the tablejump instruction. */ | |
1047 | #define CASE_VECTOR_MODE SImode | |
1048 | ||
18543a22 ILT |
1049 | /* Define as C expression which evaluates to nonzero if the tablejump |
1050 | instruction expects the table to contain offsets from the address of the | |
3aa9d5b6 | 1051 | table. |
b0435cf4 | 1052 | |
3aa9d5b6 | 1053 | Do not define this if the table should contain absolute addresses. |
260ced47 RK |
1054 | On the Alpha, the table is really GP-relative, not relative to the PC |
1055 | of the table, but we pretend that it is PC-relative; this should be OK, | |
0076aa6b | 1056 | but we should try to find some better way sometime. */ |
18543a22 | 1057 | #define CASE_VECTOR_PC_RELATIVE 1 |
1a94ca49 | 1058 | |
1a94ca49 RK |
1059 | /* Define this as 1 if `char' should by default be signed; else as 0. */ |
1060 | #define DEFAULT_SIGNED_CHAR 1 | |
1061 | ||
1a94ca49 RK |
1062 | /* Max number of bytes we can move to or from memory |
1063 | in one reasonably fast instruction. */ | |
1064 | ||
1065 | #define MOVE_MAX 8 | |
1066 | ||
7e24ffc9 | 1067 | /* If a memory-to-memory move would take MOVE_RATIO or more simple |
70128ad9 | 1068 | move-instruction pairs, we will do a movmem or libcall instead. |
7e24ffc9 HPN |
1069 | |
1070 | Without byte/word accesses, we want no more than four instructions; | |
285a5742 | 1071 | with, several single byte accesses are better. */ |
6c174fc0 RH |
1072 | |
1073 | #define MOVE_RATIO (TARGET_BWX ? 7 : 2) | |
1074 | ||
1a94ca49 RK |
1075 | /* Largest number of bytes of an object that can be placed in a register. |
1076 | On the Alpha we have plenty of registers, so use TImode. */ | |
1077 | #define MAX_FIXED_MODE_SIZE GET_MODE_BITSIZE (TImode) | |
1078 | ||
1079 | /* Nonzero if access to memory by bytes is no faster than for words. | |
825dda42 | 1080 | Also nonzero if doing byte operations (specifically shifts) in registers |
f676971a | 1081 | is undesirable. |
1a94ca49 RK |
1082 | |
1083 | On the Alpha, we want to not use the byte operation and instead use | |
1084 | masking operations to access fields; these will save instructions. */ | |
1085 | ||
1086 | #define SLOW_BYTE_ACCESS 1 | |
1087 | ||
9a63901f RK |
1088 | /* Define if operations between registers always perform the operation |
1089 | on the full register even if a narrower mode is specified. */ | |
1090 | #define WORD_REGISTER_OPERATIONS | |
1091 | ||
1092 | /* Define if loading in MODE, an integral mode narrower than BITS_PER_WORD | |
1093 | will either zero-extend or sign-extend. The value of this macro should | |
1094 | be the code that says which one of the two operations is implicitly | |
f822d252 | 1095 | done, UNKNOWN if none. */ |
b7747781 | 1096 | #define LOAD_EXTEND_OP(MODE) ((MODE) == SImode ? SIGN_EXTEND : ZERO_EXTEND) |
1a94ca49 | 1097 | |
225211e2 RK |
1098 | /* Define if loading short immediate values into registers sign extends. */ |
1099 | #define SHORT_IMMEDIATES_SIGN_EXTEND | |
1100 | ||
1a94ca49 RK |
1101 | /* Value is 1 if truncating an integer of INPREC bits to OUTPREC bits |
1102 | is done just by pretending it is already truncated. */ | |
1103 | #define TRULY_NOOP_TRUNCATION(OUTPREC, INPREC) 1 | |
1104 | ||
7dba8395 RH |
1105 | /* The CIX ctlz and cttz instructions return 64 for zero. */ |
1106 | #define CLZ_DEFINED_VALUE_AT_ZERO(MODE, VALUE) ((VALUE) = 64, TARGET_CIX) | |
1107 | #define CTZ_DEFINED_VALUE_AT_ZERO(MODE, VALUE) ((VALUE) = 64, TARGET_CIX) | |
1108 | ||
1a94ca49 RK |
1109 | /* Define the value returned by a floating-point comparison instruction. */ |
1110 | ||
12530dbe RH |
1111 | #define FLOAT_STORE_FLAG_VALUE(MODE) \ |
1112 | REAL_VALUE_ATOF ((TARGET_FLOAT_VAX ? "0.5" : "2.0"), (MODE)) | |
1a94ca49 | 1113 | |
35bb77fd RK |
1114 | /* Canonicalize a comparison from one we don't have to one we do have. */ |
1115 | ||
1116 | #define CANONICALIZE_COMPARISON(CODE,OP0,OP1) \ | |
1117 | do { \ | |
1118 | if (((CODE) == GE || (CODE) == GT || (CODE) == GEU || (CODE) == GTU) \ | |
1119 | && (GET_CODE (OP1) == REG || (OP1) == const0_rtx)) \ | |
1120 | { \ | |
1121 | rtx tem = (OP0); \ | |
1122 | (OP0) = (OP1); \ | |
1123 | (OP1) = tem; \ | |
1124 | (CODE) = swap_condition (CODE); \ | |
1125 | } \ | |
1126 | if (((CODE) == LT || (CODE) == LTU) \ | |
1127 | && GET_CODE (OP1) == CONST_INT && INTVAL (OP1) == 256) \ | |
1128 | { \ | |
1129 | (CODE) = (CODE) == LT ? LE : LEU; \ | |
1130 | (OP1) = GEN_INT (255); \ | |
1131 | } \ | |
1132 | } while (0) | |
1133 | ||
1a94ca49 RK |
1134 | /* Specify the machine mode that pointers have. |
1135 | After generation of rtl, the compiler makes no further distinction | |
1136 | between pointers and any other objects of this machine mode. */ | |
1137 | #define Pmode DImode | |
1138 | ||
285a5742 | 1139 | /* Mode of a function address in a call instruction (for indexing purposes). */ |
1a94ca49 RK |
1140 | |
1141 | #define FUNCTION_MODE Pmode | |
1142 | ||
1143 | /* Define this if addresses of constant functions | |
1144 | shouldn't be put through pseudo regs where they can be cse'd. | |
1145 | Desirable on machines where ordinary constants are expensive | |
1146 | but a CALL with constant address is cheap. | |
1147 | ||
1148 | We define this on the Alpha so that gen_call and gen_call_value | |
1149 | get to see the SYMBOL_REF (for the hint field of the jsr). It will | |
1150 | then copy it into a register, thus actually letting the address be | |
1151 | cse'ed. */ | |
1152 | ||
1153 | #define NO_FUNCTION_CSE | |
1154 | ||
d969caf8 | 1155 | /* Define this to be nonzero if shift instructions ignore all but the low-order |
285a5742 | 1156 | few bits. */ |
d969caf8 | 1157 | #define SHIFT_COUNT_TRUNCATED 1 |
1a94ca49 RK |
1158 | \f |
1159 | /* Control the assembler format that we output. */ | |
1160 | ||
1a94ca49 RK |
1161 | /* Output to assembler file text saying following lines |
1162 | may contain character constants, extra white space, comments, etc. */ | |
1eb356b9 | 1163 | #define ASM_APP_ON (TARGET_EXPLICIT_RELOCS ? "\t.set\tmacro\n" : "") |
1a94ca49 RK |
1164 | |
1165 | /* Output to assembler file text saying following lines | |
1166 | no longer contain unusual constructs. */ | |
1eb356b9 | 1167 | #define ASM_APP_OFF (TARGET_EXPLICIT_RELOCS ? "\t.set\tnomacro\n" : "") |
1a94ca49 | 1168 | |
93de6f51 | 1169 | #define TEXT_SECTION_ASM_OP "\t.text" |
1a94ca49 RK |
1170 | |
1171 | /* Output before read-only data. */ | |
1172 | ||
93de6f51 | 1173 | #define READONLY_DATA_SECTION_ASM_OP "\t.rdata" |
1a94ca49 RK |
1174 | |
1175 | /* Output before writable data. */ | |
1176 | ||
93de6f51 | 1177 | #define DATA_SECTION_ASM_OP "\t.data" |
1a94ca49 | 1178 | |
1a94ca49 RK |
1179 | /* How to refer to registers in assembler output. |
1180 | This sequence is indexed by compiler's hard-register-number (see above). */ | |
1181 | ||
1182 | #define REGISTER_NAMES \ | |
1183 | {"$0", "$1", "$2", "$3", "$4", "$5", "$6", "$7", "$8", \ | |
1184 | "$9", "$10", "$11", "$12", "$13", "$14", "$15", \ | |
1185 | "$16", "$17", "$18", "$19", "$20", "$21", "$22", "$23", \ | |
130d2d72 | 1186 | "$24", "$25", "$26", "$27", "$28", "$29", "$30", "AP", \ |
1a94ca49 RK |
1187 | "$f0", "$f1", "$f2", "$f3", "$f4", "$f5", "$f6", "$f7", "$f8", \ |
1188 | "$f9", "$f10", "$f11", "$f12", "$f13", "$f14", "$f15", \ | |
1189 | "$f16", "$f17", "$f18", "$f19", "$f20", "$f21", "$f22", "$f23",\ | |
52a69200 | 1190 | "$f24", "$f25", "$f26", "$f27", "$f28", "$f29", "$f30", "FP"} |
1a94ca49 | 1191 | |
1eb356b9 RH |
1192 | /* Strip name encoding when emitting labels. */ |
1193 | ||
1194 | #define ASM_OUTPUT_LABELREF(STREAM, NAME) \ | |
1195 | do { \ | |
1196 | const char *name_ = NAME; \ | |
53e8b0b8 | 1197 | if (*name_ == '@' || *name_ == '%') \ |
1eb356b9 RH |
1198 | name_ += 2; \ |
1199 | if (*name_ == '*') \ | |
1200 | name_++; \ | |
1201 | else \ | |
1202 | fputs (user_label_prefix, STREAM); \ | |
1203 | fputs (name_, STREAM); \ | |
1204 | } while (0) | |
1205 | ||
506a61b1 KG |
1206 | /* Globalizing directive for a label. */ |
1207 | #define GLOBAL_ASM_OP "\t.globl " | |
1a94ca49 | 1208 | |
285a5742 | 1209 | /* The prefix to add to user-visible assembler symbols. */ |
1a94ca49 | 1210 | |
4e0c8ad2 | 1211 | #define USER_LABEL_PREFIX "" |
1a94ca49 | 1212 | |
1a94ca49 | 1213 | /* This is how to output a label for a jump table. Arguments are the same as |
4977bab6 | 1214 | for (*targetm.asm_out.internal_label), except the insn for the jump table is |
285a5742 | 1215 | passed. */ |
1a94ca49 RK |
1216 | |
1217 | #define ASM_OUTPUT_CASE_LABEL(FILE,PREFIX,NUM,TABLEINSN) \ | |
4977bab6 | 1218 | { ASM_OUTPUT_ALIGN (FILE, 2); (*targetm.asm_out.internal_label) (FILE, PREFIX, NUM); } |
1a94ca49 RK |
1219 | |
1220 | /* This is how to store into the string LABEL | |
1221 | the symbol_ref name of an internal numbered label where | |
1222 | PREFIX is the class of label and NUM is the number within the class. | |
1223 | This is suitable for output with `assemble_name'. */ | |
1224 | ||
1225 | #define ASM_GENERATE_INTERNAL_LABEL(LABEL,PREFIX,NUM) \ | |
d1e6b55b | 1226 | sprintf ((LABEL), "*$%s%ld", (PREFIX), (long)(NUM)) |
1a94ca49 | 1227 | |
1a94ca49 RK |
1228 | /* We use the default ASCII-output routine, except that we don't write more |
1229 | than 50 characters since the assembler doesn't support very long lines. */ | |
1230 | ||
1231 | #define ASM_OUTPUT_ASCII(MYFILE, MYSTRING, MYLENGTH) \ | |
1232 | do { \ | |
1233 | FILE *_hide_asm_out_file = (MYFILE); \ | |
e03c5670 | 1234 | const unsigned char *_hide_p = (const unsigned char *) (MYSTRING); \ |
1a94ca49 RK |
1235 | int _hide_thissize = (MYLENGTH); \ |
1236 | int _size_so_far = 0; \ | |
1237 | { \ | |
1238 | FILE *asm_out_file = _hide_asm_out_file; \ | |
e03c5670 | 1239 | const unsigned char *p = _hide_p; \ |
1a94ca49 RK |
1240 | int thissize = _hide_thissize; \ |
1241 | int i; \ | |
1242 | fprintf (asm_out_file, "\t.ascii \""); \ | |
1243 | \ | |
1244 | for (i = 0; i < thissize; i++) \ | |
1245 | { \ | |
1246 | register int c = p[i]; \ | |
1247 | \ | |
1248 | if (_size_so_far ++ > 50 && i < thissize - 4) \ | |
1249 | _size_so_far = 0, fprintf (asm_out_file, "\"\n\t.ascii \""); \ | |
1250 | \ | |
1251 | if (c == '\"' || c == '\\') \ | |
1252 | putc ('\\', asm_out_file); \ | |
1253 | if (c >= ' ' && c < 0177) \ | |
1254 | putc (c, asm_out_file); \ | |
1255 | else \ | |
1256 | { \ | |
1257 | fprintf (asm_out_file, "\\%o", c); \ | |
1258 | /* After an octal-escape, if a digit follows, \ | |
1259 | terminate one string constant and start another. \ | |
8aeea6e6 | 1260 | The VAX assembler fails to stop reading the escape \ |
1a94ca49 RK |
1261 | after three digits, so this is the only way we \ |
1262 | can get it to parse the data properly. */ \ | |
0df6c2c7 | 1263 | if (i < thissize - 1 && ISDIGIT (p[i + 1])) \ |
b2d5e311 | 1264 | _size_so_far = 0, fprintf (asm_out_file, "\"\n\t.ascii \""); \ |
1a94ca49 RK |
1265 | } \ |
1266 | } \ | |
1267 | fprintf (asm_out_file, "\"\n"); \ | |
1268 | } \ | |
1269 | } \ | |
1270 | while (0) | |
52a69200 | 1271 | |
260ced47 | 1272 | /* This is how to output an element of a case-vector that is relative. */ |
1a94ca49 | 1273 | |
33f7f353 | 1274 | #define ASM_OUTPUT_ADDR_DIFF_ELT(FILE, BODY, VALUE, REL) \ |
be7b80f4 | 1275 | fprintf (FILE, "\t.%s $L%d\n", TARGET_ABI_WINDOWS_NT ? "long" : "gprel32", \ |
8dfe3c62 | 1276 | (VALUE)) |
1a94ca49 RK |
1277 | |
1278 | /* This is how to output an assembler line | |
1279 | that says to advance the location counter | |
1280 | to a multiple of 2**LOG bytes. */ | |
1281 | ||
1282 | #define ASM_OUTPUT_ALIGN(FILE,LOG) \ | |
1283 | if ((LOG) != 0) \ | |
1284 | fprintf (FILE, "\t.align %d\n", LOG); | |
1285 | ||
1286 | /* This is how to advance the location counter by SIZE bytes. */ | |
1287 | ||
1288 | #define ASM_OUTPUT_SKIP(FILE,SIZE) \ | |
ad14dc5c | 1289 | fprintf (FILE, "\t.space "HOST_WIDE_INT_PRINT_UNSIGNED"\n", (SIZE)) |
1a94ca49 RK |
1290 | |
1291 | /* This says how to output an assembler line | |
1292 | to define a global common symbol. */ | |
1293 | ||
1294 | #define ASM_OUTPUT_COMMON(FILE, NAME, SIZE, ROUNDED) \ | |
1295 | ( fputs ("\t.comm ", (FILE)), \ | |
1296 | assemble_name ((FILE), (NAME)), \ | |
58e15542 | 1297 | fprintf ((FILE), ","HOST_WIDE_INT_PRINT_UNSIGNED"\n", (SIZE))) |
1a94ca49 RK |
1298 | |
1299 | /* This says how to output an assembler line | |
1300 | to define a local common symbol. */ | |
1301 | ||
1302 | #define ASM_OUTPUT_LOCAL(FILE, NAME, SIZE,ROUNDED) \ | |
1303 | ( fputs ("\t.lcomm ", (FILE)), \ | |
1304 | assemble_name ((FILE), (NAME)), \ | |
58e15542 | 1305 | fprintf ((FILE), ","HOST_WIDE_INT_PRINT_UNSIGNED"\n", (SIZE))) |
60593797 | 1306 | \f |
9ec36da5 | 1307 | |
1a94ca49 RK |
1308 | /* Print operand X (an rtx) in assembler syntax to file FILE. |
1309 | CODE is a letter or dot (`z' in `%z0') or 0 if no letter was specified. | |
1310 | For `%' followed by punctuation, CODE is the punctuation and X is null. */ | |
1311 | ||
1312 | #define PRINT_OPERAND(FILE, X, CODE) print_operand (FILE, X, CODE) | |
1313 | ||
1314 | /* Determine which codes are valid without a following integer. These must | |
941cc05a RK |
1315 | not be alphabetic. |
1316 | ||
1317 | ~ Generates the name of the current function. | |
2bf6230d | 1318 | |
be7560ea RH |
1319 | / Generates the instruction suffix. The TRAP_SUFFIX and ROUND_SUFFIX |
1320 | attributes are examined to determine what is appropriate. | |
e5958492 RK |
1321 | |
1322 | , Generates single precision suffix for floating point | |
1323 | instructions (s for IEEE, f for VAX) | |
1324 | ||
1325 | - Generates double precision suffix for floating point | |
1326 | instructions (t for IEEE, g for VAX) | |
2bf6230d | 1327 | */ |
1a94ca49 | 1328 | |
be7560ea | 1329 | #define PRINT_OPERAND_PUNCT_VALID_P(CODE) \ |
1eb356b9 | 1330 | ((CODE) == '/' || (CODE) == ',' || (CODE) == '-' || (CODE) == '~' \ |
e4bec638 | 1331 | || (CODE) == '#' || (CODE) == '*' || (CODE) == '&') |
201312c2 | 1332 | |
1a94ca49 RK |
1333 | /* Print a memory address as an operand to reference that memory location. */ |
1334 | ||
714b019c RH |
1335 | #define PRINT_OPERAND_ADDRESS(FILE, ADDR) \ |
1336 | print_operand_address((FILE), (ADDR)) | |
03f8c4cc | 1337 | \f |
63966b3b | 1338 | /* Implement `va_start' for varargs and stdarg. */ |
e5faf155 ZW |
1339 | #define EXPAND_BUILTIN_VA_START(valist, nextarg) \ |
1340 | alpha_va_start (valist, nextarg) | |
63966b3b | 1341 | \f |
34fa88ab RK |
1342 | /* Tell collect that the object format is ECOFF. */ |
1343 | #define OBJECT_FORMAT_COFF | |
1344 | #define EXTENDED_COFF | |
1345 | ||
1346 | /* If we use NM, pass -g to it so it only lists globals. */ | |
1347 | #define NM_FLAGS "-pg" | |
1348 | ||
03f8c4cc RK |
1349 | /* Definitions for debugging. */ |
1350 | ||
23532de9 JT |
1351 | #define SDB_DEBUGGING_INFO 1 /* generate info for mips-tfile */ |
1352 | #define DBX_DEBUGGING_INFO 1 /* generate embedded stabs */ | |
1353 | #define MIPS_DEBUGGING_INFO 1 /* MIPS specific debugging info */ | |
03f8c4cc RK |
1354 | |
1355 | #ifndef PREFERRED_DEBUGGING_TYPE /* assume SDB_DEBUGGING_INFO */ | |
fe0986b4 | 1356 | #define PREFERRED_DEBUGGING_TYPE SDB_DEBUG |
03f8c4cc RK |
1357 | #endif |
1358 | ||
1359 | ||
1360 | /* Correct the offset of automatic variables and arguments. Note that | |
1361 | the Alpha debug format wants all automatic variables and arguments | |
1362 | to be in terms of two different offsets from the virtual frame pointer, | |
1363 | which is the stack pointer before any adjustment in the function. | |
1364 | The offset for the argument pointer is fixed for the native compiler, | |
1365 | it is either zero (for the no arguments case) or large enough to hold | |
1366 | all argument registers. | |
1367 | The offset for the auto pointer is the fourth argument to the .frame | |
1368 | directive (local_offset). | |
1369 | To stay compatible with the native tools we use the same offsets | |
1370 | from the virtual frame pointer and adjust the debugger arg/auto offsets | |
1371 | accordingly. These debugger offsets are set up in output_prolog. */ | |
1372 | ||
9a0b18f2 RK |
1373 | extern long alpha_arg_offset; |
1374 | extern long alpha_auto_offset; | |
03f8c4cc RK |
1375 | #define DEBUGGER_AUTO_OFFSET(X) \ |
1376 | ((GET_CODE (X) == PLUS ? INTVAL (XEXP (X, 1)) : 0) + alpha_auto_offset) | |
1377 | #define DEBUGGER_ARG_OFFSET(OFFSET, X) (OFFSET + alpha_arg_offset) | |
1378 | ||
3e487b21 | 1379 | /* mips-tfile doesn't understand .stabd directives. */ |
93a27b7b ZW |
1380 | #define DBX_OUTPUT_SOURCE_LINE(STREAM, LINE, COUNTER) do { \ |
1381 | dbxout_begin_stabn_sline (LINE); \ | |
1382 | dbxout_stab_value_internal_label ("LM", &COUNTER); \ | |
1383 | } while (0) | |
3e487b21 ZW |
1384 | |
1385 | /* We want to use MIPS-style .loc directives for SDB line numbers. */ | |
93a27b7b | 1386 | extern int num_source_filenames; |
3e487b21 | 1387 | #define SDB_OUTPUT_SOURCE_LINE(STREAM, LINE) \ |
93a27b7b | 1388 | fprintf (STREAM, "\t.loc\t%d %d\n", num_source_filenames, LINE) |
03f8c4cc RK |
1389 | |
1390 | #define ASM_OUTPUT_SOURCE_FILENAME(STREAM, NAME) \ | |
1391 | alpha_output_filename (STREAM, NAME) | |
03f8c4cc | 1392 | |
4330b0e7 JW |
1393 | /* mips-tfile.c limits us to strings of one page. We must underestimate this |
1394 | number, because the real length runs past this up to the next | |
1395 | continuation point. This is really a dbxout.c bug. */ | |
1396 | #define DBX_CONTIN_LENGTH 3000 | |
03f8c4cc RK |
1397 | |
1398 | /* By default, turn on GDB extensions. */ | |
1399 | #define DEFAULT_GDB_EXTENSIONS 1 | |
1400 | ||
7aadc7c2 RK |
1401 | /* Stabs-in-ECOFF can't handle dbxout_function_end(). */ |
1402 | #define NO_DBX_FUNCTION_END 1 | |
1403 | ||
03f8c4cc RK |
1404 | /* If we are smuggling stabs through the ALPHA ECOFF object |
1405 | format, put a comment in front of the .stab<x> operation so | |
1406 | that the ALPHA assembler does not choke. The mips-tfile program | |
1407 | will correctly put the stab into the object file. */ | |
1408 | ||
93de6f51 HPN |
1409 | #define ASM_STABS_OP ((TARGET_GAS) ? "\t.stabs\t" : " #.stabs\t") |
1410 | #define ASM_STABN_OP ((TARGET_GAS) ? "\t.stabn\t" : " #.stabn\t") | |
1411 | #define ASM_STABD_OP ((TARGET_GAS) ? "\t.stabd\t" : " #.stabd\t") | |
03f8c4cc RK |
1412 | |
1413 | /* Forward references to tags are allowed. */ | |
1414 | #define SDB_ALLOW_FORWARD_REFERENCES | |
1415 | ||
1416 | /* Unknown tags are also allowed. */ | |
1417 | #define SDB_ALLOW_UNKNOWN_REFERENCES | |
1418 | ||
1419 | #define PUT_SDB_DEF(a) \ | |
1420 | do { \ | |
1421 | fprintf (asm_out_file, "\t%s.def\t", \ | |
1422 | (TARGET_GAS) ? "" : "#"); \ | |
1423 | ASM_OUTPUT_LABELREF (asm_out_file, a); \ | |
1424 | fputc (';', asm_out_file); \ | |
1425 | } while (0) | |
1426 | ||
1427 | #define PUT_SDB_PLAIN_DEF(a) \ | |
1428 | do { \ | |
1429 | fprintf (asm_out_file, "\t%s.def\t.%s;", \ | |
1430 | (TARGET_GAS) ? "" : "#", (a)); \ | |
1431 | } while (0) | |
1432 | ||
1433 | #define PUT_SDB_TYPE(a) \ | |
1434 | do { \ | |
1435 | fprintf (asm_out_file, "\t.type\t0x%x;", (a)); \ | |
1436 | } while (0) | |
1437 | ||
1438 | /* For block start and end, we create labels, so that | |
1439 | later we can figure out where the correct offset is. | |
1440 | The normal .ent/.end serve well enough for functions, | |
1441 | so those are just commented out. */ | |
1442 | ||
1443 | extern int sdb_label_count; /* block start/end next label # */ | |
1444 | ||
1445 | #define PUT_SDB_BLOCK_START(LINE) \ | |
1446 | do { \ | |
1447 | fprintf (asm_out_file, \ | |
1448 | "$Lb%d:\n\t%s.begin\t$Lb%d\t%d\n", \ | |
1449 | sdb_label_count, \ | |
1450 | (TARGET_GAS) ? "" : "#", \ | |
1451 | sdb_label_count, \ | |
1452 | (LINE)); \ | |
1453 | sdb_label_count++; \ | |
1454 | } while (0) | |
1455 | ||
1456 | #define PUT_SDB_BLOCK_END(LINE) \ | |
1457 | do { \ | |
1458 | fprintf (asm_out_file, \ | |
1459 | "$Le%d:\n\t%s.bend\t$Le%d\t%d\n", \ | |
1460 | sdb_label_count, \ | |
1461 | (TARGET_GAS) ? "" : "#", \ | |
1462 | sdb_label_count, \ | |
1463 | (LINE)); \ | |
1464 | sdb_label_count++; \ | |
1465 | } while (0) | |
1466 | ||
1467 | #define PUT_SDB_FUNCTION_START(LINE) | |
1468 | ||
1469 | #define PUT_SDB_FUNCTION_END(LINE) | |
1470 | ||
3c303f52 | 1471 | #define PUT_SDB_EPILOGUE_END(NAME) ((void)(NAME)) |
03f8c4cc | 1472 | |
03f8c4cc RK |
1473 | /* Macros for mips-tfile.c to encapsulate stabs in ECOFF, and for |
1474 | mips-tdump.c to print them out. | |
1475 | ||
1476 | These must match the corresponding definitions in gdb/mipsread.c. | |
285a5742 | 1477 | Unfortunately, gcc and gdb do not currently share any directories. */ |
03f8c4cc RK |
1478 | |
1479 | #define CODE_MASK 0x8F300 | |
1480 | #define MIPS_IS_STAB(sym) (((sym)->index & 0xFFF00) == CODE_MASK) | |
1481 | #define MIPS_MARK_STAB(code) ((code)+CODE_MASK) | |
1482 | #define MIPS_UNMARK_STAB(code) ((code)-CODE_MASK) | |
1483 | ||
1484 | /* Override some mips-tfile definitions. */ | |
1485 | ||
1486 | #define SHASH_SIZE 511 | |
1487 | #define THASH_SIZE 55 | |
1e6c6f11 RK |
1488 | |
1489 | /* Align ecoff symbol tables to avoid OSF1/1.3 nm complaints. */ | |
1490 | ||
1491 | #define ALIGN_SYMTABLE_OFFSET(OFFSET) (((OFFSET) + 7) & ~7) | |
2f55b70b | 1492 | |
b0435cf4 RH |
1493 | /* The system headers under Alpha systems are generally C++-aware. */ |
1494 | #define NO_IMPLICIT_EXTERN_C |