Mercurial > hg > CbC > CbC_gcc
annotate gcc/config/alpha/alpha.h @ 67:f6334be47118
update gcc from gcc-4.6-20100522 to gcc-4.6-20110318
author | nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp> |
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date | Tue, 22 Mar 2011 17:18:12 +0900 |
parents | 77e2b8dfacca |
children | 04ced10e8804 |
rev | line source |
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0 | 1 /* Definitions of target machine for GNU compiler, for DEC Alpha. |
2 Copyright (C) 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, | |
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nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp>
parents:
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changeset
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3 2000, 2001, 2002, 2004, 2005, 2007, 2008, 2009, 2010 |
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update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
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4 Free Software Foundation, Inc. |
0 | 5 Contributed by Richard Kenner (kenner@vlsi1.ultra.nyu.edu) |
6 | |
7 This file is part of GCC. | |
8 | |
9 GCC is free software; you can redistribute it and/or modify | |
10 it under the terms of the GNU General Public License as published by | |
11 the Free Software Foundation; either version 3, or (at your option) | |
12 any later version. | |
13 | |
14 GCC is distributed in the hope that it will be useful, | |
15 but WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
17 GNU General Public License for more details. | |
18 | |
19 You should have received a copy of the GNU General Public License | |
20 along with GCC; see the file COPYING3. If not see | |
21 <http://www.gnu.org/licenses/>. */ | |
22 | |
23 /* Target CPU builtins. */ | |
24 #define TARGET_CPU_CPP_BUILTINS() \ | |
25 do \ | |
26 { \ | |
27 builtin_define ("__alpha"); \ | |
28 builtin_define ("__alpha__"); \ | |
29 builtin_assert ("cpu=alpha"); \ | |
30 builtin_assert ("machine=alpha"); \ | |
31 if (TARGET_CIX) \ | |
32 { \ | |
33 builtin_define ("__alpha_cix__"); \ | |
34 builtin_assert ("cpu=cix"); \ | |
35 } \ | |
36 if (TARGET_FIX) \ | |
37 { \ | |
38 builtin_define ("__alpha_fix__"); \ | |
39 builtin_assert ("cpu=fix"); \ | |
40 } \ | |
41 if (TARGET_BWX) \ | |
42 { \ | |
43 builtin_define ("__alpha_bwx__"); \ | |
44 builtin_assert ("cpu=bwx"); \ | |
45 } \ | |
46 if (TARGET_MAX) \ | |
47 { \ | |
48 builtin_define ("__alpha_max__"); \ | |
49 builtin_assert ("cpu=max"); \ | |
50 } \ | |
51 if (alpha_cpu == PROCESSOR_EV6) \ | |
52 { \ | |
53 builtin_define ("__alpha_ev6__"); \ | |
54 builtin_assert ("cpu=ev6"); \ | |
55 } \ | |
56 else if (alpha_cpu == PROCESSOR_EV5) \ | |
57 { \ | |
58 builtin_define ("__alpha_ev5__"); \ | |
59 builtin_assert ("cpu=ev5"); \ | |
60 } \ | |
61 else /* Presumably ev4. */ \ | |
62 { \ | |
63 builtin_define ("__alpha_ev4__"); \ | |
64 builtin_assert ("cpu=ev4"); \ | |
65 } \ | |
66 if (TARGET_IEEE || TARGET_IEEE_WITH_INEXACT) \ | |
67 builtin_define ("_IEEE_FP"); \ | |
68 if (TARGET_IEEE_WITH_INEXACT) \ | |
69 builtin_define ("_IEEE_FP_INEXACT"); \ | |
70 if (TARGET_LONG_DOUBLE_128) \ | |
71 builtin_define ("__LONG_DOUBLE_128__"); \ | |
72 \ | |
73 /* Macros dependent on the C dialect. */ \ | |
74 SUBTARGET_LANGUAGE_CPP_BUILTINS(); \ | |
75 } while (0) | |
76 | |
77 #ifndef SUBTARGET_LANGUAGE_CPP_BUILTINS | |
78 #define SUBTARGET_LANGUAGE_CPP_BUILTINS() \ | |
79 do \ | |
80 { \ | |
81 if (preprocessing_asm_p ()) \ | |
82 builtin_define_std ("LANGUAGE_ASSEMBLY"); \ | |
83 else if (c_dialect_cxx ()) \ | |
84 { \ | |
85 builtin_define ("__LANGUAGE_C_PLUS_PLUS"); \ | |
86 builtin_define ("__LANGUAGE_C_PLUS_PLUS__"); \ | |
87 } \ | |
88 else \ | |
89 builtin_define_std ("LANGUAGE_C"); \ | |
90 if (c_dialect_objc ()) \ | |
91 { \ | |
92 builtin_define ("__LANGUAGE_OBJECTIVE_C"); \ | |
93 builtin_define ("__LANGUAGE_OBJECTIVE_C__"); \ | |
94 } \ | |
95 } \ | |
96 while (0) | |
97 #endif | |
98 | |
99 /* Print subsidiary information on the compiler version in use. */ | |
100 #define TARGET_VERSION | |
101 | |
102 /* Run-time compilation parameters selecting different hardware subsets. */ | |
103 | |
104 /* Which processor to schedule for. The cpu attribute defines a list that | |
105 mirrors this list, so changes to alpha.md must be made at the same time. */ | |
106 | |
107 enum processor_type | |
108 { | |
109 PROCESSOR_EV4, /* 2106[46]{a,} */ | |
110 PROCESSOR_EV5, /* 21164{a,pc,} */ | |
111 PROCESSOR_EV6, /* 21264 */ | |
112 PROCESSOR_MAX | |
113 }; | |
114 | |
115 extern enum processor_type alpha_cpu; | |
116 extern enum processor_type alpha_tune; | |
117 | |
118 enum alpha_trap_precision | |
119 { | |
120 ALPHA_TP_PROG, /* No precision (default). */ | |
121 ALPHA_TP_FUNC, /* Trap contained within originating function. */ | |
122 ALPHA_TP_INSN /* Instruction accuracy and code is resumption safe. */ | |
123 }; | |
124 | |
125 enum alpha_fp_rounding_mode | |
126 { | |
127 ALPHA_FPRM_NORM, /* Normal rounding mode. */ | |
128 ALPHA_FPRM_MINF, /* Round towards minus-infinity. */ | |
129 ALPHA_FPRM_CHOP, /* Chopped rounding mode (towards 0). */ | |
130 ALPHA_FPRM_DYN /* Dynamic rounding mode. */ | |
131 }; | |
132 | |
133 enum alpha_fp_trap_mode | |
134 { | |
135 ALPHA_FPTM_N, /* Normal trap mode. */ | |
136 ALPHA_FPTM_U, /* Underflow traps enabled. */ | |
137 ALPHA_FPTM_SU, /* Software completion, w/underflow traps */ | |
138 ALPHA_FPTM_SUI /* Software completion, w/underflow & inexact traps */ | |
139 }; | |
140 | |
141 extern enum alpha_trap_precision alpha_tp; | |
142 extern enum alpha_fp_rounding_mode alpha_fprm; | |
143 extern enum alpha_fp_trap_mode alpha_fptm; | |
144 | |
145 /* Invert the easy way to make options work. */ | |
146 #define TARGET_FP (!TARGET_SOFT_FP) | |
147 | |
148 /* These are for target os support and cannot be changed at runtime. */ | |
149 #define TARGET_ABI_WINDOWS_NT 0 | |
150 #define TARGET_ABI_OPEN_VMS 0 | |
151 #define TARGET_ABI_UNICOSMK 0 | |
152 #define TARGET_ABI_OSF (!TARGET_ABI_WINDOWS_NT \ | |
153 && !TARGET_ABI_OPEN_VMS \ | |
154 && !TARGET_ABI_UNICOSMK) | |
155 | |
156 #ifndef TARGET_AS_CAN_SUBTRACT_LABELS | |
157 #define TARGET_AS_CAN_SUBTRACT_LABELS TARGET_GAS | |
158 #endif | |
159 #ifndef TARGET_AS_SLASH_BEFORE_SUFFIX | |
160 #define TARGET_AS_SLASH_BEFORE_SUFFIX TARGET_GAS | |
161 #endif | |
162 #ifndef TARGET_CAN_FAULT_IN_PROLOGUE | |
163 #define TARGET_CAN_FAULT_IN_PROLOGUE 0 | |
164 #endif | |
165 #ifndef TARGET_HAS_XFLOATING_LIBS | |
166 #define TARGET_HAS_XFLOATING_LIBS TARGET_LONG_DOUBLE_128 | |
167 #endif | |
168 #ifndef TARGET_PROFILING_NEEDS_GP | |
169 #define TARGET_PROFILING_NEEDS_GP 0 | |
170 #endif | |
171 #ifndef TARGET_LD_BUGGY_LDGP | |
172 #define TARGET_LD_BUGGY_LDGP 0 | |
173 #endif | |
174 #ifndef TARGET_FIXUP_EV5_PREFETCH | |
175 #define TARGET_FIXUP_EV5_PREFETCH 0 | |
176 #endif | |
177 #ifndef HAVE_AS_TLS | |
178 #define HAVE_AS_TLS 0 | |
179 #endif | |
180 | |
181 #define TARGET_DEFAULT MASK_FPREGS | |
182 | |
183 #ifndef TARGET_CPU_DEFAULT | |
184 #define TARGET_CPU_DEFAULT 0 | |
185 #endif | |
186 | |
187 #ifndef TARGET_DEFAULT_EXPLICIT_RELOCS | |
188 #ifdef HAVE_AS_EXPLICIT_RELOCS | |
189 #define TARGET_DEFAULT_EXPLICIT_RELOCS MASK_EXPLICIT_RELOCS | |
190 #define TARGET_SUPPORT_ARCH 1 | |
191 #else | |
192 #define TARGET_DEFAULT_EXPLICIT_RELOCS 0 | |
193 #endif | |
194 #endif | |
195 | |
196 #ifndef TARGET_SUPPORT_ARCH | |
197 #define TARGET_SUPPORT_ARCH 0 | |
198 #endif | |
199 | |
200 /* Support for a compile-time default CPU, et cetera. The rules are: | |
201 --with-cpu is ignored if -mcpu is specified. | |
202 --with-tune is ignored if -mtune is specified. */ | |
203 #define OPTION_DEFAULT_SPECS \ | |
204 {"cpu", "%{!mcpu=*:-mcpu=%(VALUE)}" }, \ | |
205 {"tune", "%{!mtune=*:-mtune=%(VALUE)}" } | |
206 | |
207 | |
208 /* target machine storage layout */ | |
209 | |
210 /* Define the size of `int'. The default is the same as the word size. */ | |
211 #define INT_TYPE_SIZE 32 | |
212 | |
213 /* Define the size of `long long'. The default is the twice the word size. */ | |
214 #define LONG_LONG_TYPE_SIZE 64 | |
215 | |
216 /* The two floating-point formats we support are S-floating, which is | |
217 4 bytes, and T-floating, which is 8 bytes. `float' is S and `double' | |
218 and `long double' are T. */ | |
219 | |
220 #define FLOAT_TYPE_SIZE 32 | |
221 #define DOUBLE_TYPE_SIZE 64 | |
222 #define LONG_DOUBLE_TYPE_SIZE (TARGET_LONG_DOUBLE_128 ? 128 : 64) | |
223 | |
224 /* Define this to set long double type size to use in libgcc2.c, which can | |
225 not depend on target_flags. */ | |
226 #ifdef __LONG_DOUBLE_128__ | |
227 #define LIBGCC2_LONG_DOUBLE_TYPE_SIZE 128 | |
228 #else | |
229 #define LIBGCC2_LONG_DOUBLE_TYPE_SIZE 64 | |
230 #endif | |
231 | |
232 /* Work around target_flags dependency in ada/targtyps.c. */ | |
233 #define WIDEST_HARDWARE_FP_SIZE 64 | |
234 | |
235 #define WCHAR_TYPE "unsigned int" | |
236 #define WCHAR_TYPE_SIZE 32 | |
237 | |
238 /* Define this macro if it is advisable to hold scalars in registers | |
239 in a wider mode than that declared by the program. In such cases, | |
240 the value is constrained to be within the bounds of the declared | |
241 type, but kept valid in the wider mode. The signedness of the | |
242 extension may differ from that of the type. | |
243 | |
244 For Alpha, we always store objects in a full register. 32-bit integers | |
245 are always sign-extended, but smaller objects retain their signedness. | |
246 | |
247 Note that small vector types can get mapped onto integer modes at the | |
248 whim of not appearing in alpha-modes.def. We never promoted these | |
249 values before; don't do so now that we've trimmed the set of modes to | |
250 those actually implemented in the backend. */ | |
251 | |
252 #define PROMOTE_MODE(MODE,UNSIGNEDP,TYPE) \ | |
253 if (GET_MODE_CLASS (MODE) == MODE_INT \ | |
254 && (TYPE == NULL || TREE_CODE (TYPE) != VECTOR_TYPE) \ | |
255 && GET_MODE_SIZE (MODE) < UNITS_PER_WORD) \ | |
256 { \ | |
257 if ((MODE) == SImode) \ | |
258 (UNSIGNEDP) = 0; \ | |
259 (MODE) = DImode; \ | |
260 } | |
261 | |
262 /* Define this if most significant bit is lowest numbered | |
263 in instructions that operate on numbered bit-fields. | |
264 | |
265 There are no such instructions on the Alpha, but the documentation | |
266 is little endian. */ | |
267 #define BITS_BIG_ENDIAN 0 | |
268 | |
269 /* Define this if most significant byte of a word is the lowest numbered. | |
270 This is false on the Alpha. */ | |
271 #define BYTES_BIG_ENDIAN 0 | |
272 | |
273 /* Define this if most significant word of a multiword number is lowest | |
274 numbered. | |
275 | |
276 For Alpha we can decide arbitrarily since there are no machine instructions | |
277 for them. Might as well be consistent with bytes. */ | |
278 #define WORDS_BIG_ENDIAN 0 | |
279 | |
280 /* Width of a word, in units (bytes). */ | |
281 #define UNITS_PER_WORD 8 | |
282 | |
283 /* Width in bits of a pointer. | |
284 See also the macro `Pmode' defined below. */ | |
285 #define POINTER_SIZE 64 | |
286 | |
287 /* Allocation boundary (in *bits*) for storing arguments in argument list. */ | |
288 #define PARM_BOUNDARY 64 | |
289 | |
290 /* Boundary (in *bits*) on which stack pointer should be aligned. */ | |
291 #define STACK_BOUNDARY 128 | |
292 | |
293 /* Allocation boundary (in *bits*) for the code of a function. */ | |
294 #define FUNCTION_BOUNDARY 32 | |
295 | |
296 /* Alignment of field after `int : 0' in a structure. */ | |
297 #define EMPTY_FIELD_BOUNDARY 64 | |
298 | |
299 /* Every structure's size must be a multiple of this. */ | |
300 #define STRUCTURE_SIZE_BOUNDARY 8 | |
301 | |
302 /* A bit-field declared as `int' forces `int' alignment for the struct. */ | |
303 #define PCC_BITFIELD_TYPE_MATTERS 1 | |
304 | |
305 /* No data type wants to be aligned rounder than this. */ | |
306 #define BIGGEST_ALIGNMENT 128 | |
307 | |
308 /* For atomic access to objects, must have at least 32-bit alignment | |
309 unless the machine has byte operations. */ | |
310 #define MINIMUM_ATOMIC_ALIGNMENT ((unsigned int) (TARGET_BWX ? 8 : 32)) | |
311 | |
312 /* Align all constants and variables to at least a word boundary so | |
313 we can pick up pieces of them faster. */ | |
314 /* ??? Only if block-move stuff knows about different source/destination | |
315 alignment. */ | |
316 #if 0 | |
317 #define CONSTANT_ALIGNMENT(EXP, ALIGN) MAX ((ALIGN), BITS_PER_WORD) | |
318 #define DATA_ALIGNMENT(EXP, ALIGN) MAX ((ALIGN), BITS_PER_WORD) | |
319 #endif | |
320 | |
321 /* Set this nonzero if move instructions will actually fail to work | |
322 when given unaligned data. | |
323 | |
324 Since we get an error message when we do one, call them invalid. */ | |
325 | |
326 #define STRICT_ALIGNMENT 1 | |
327 | |
328 /* Set this nonzero if unaligned move instructions are extremely slow. | |
329 | |
330 On the Alpha, they trap. */ | |
331 | |
332 #define SLOW_UNALIGNED_ACCESS(MODE, ALIGN) 1 | |
333 | |
334 /* Standard register usage. */ | |
335 | |
336 /* Number of actual hardware registers. | |
337 The hardware registers are assigned numbers for the compiler | |
338 from 0 to just below FIRST_PSEUDO_REGISTER. | |
339 All registers that the compiler knows about must be given numbers, | |
340 even those that are not normally considered general registers. | |
341 | |
342 We define all 32 integer registers, even though $31 is always zero, | |
343 and all 32 floating-point registers, even though $f31 is also | |
344 always zero. We do not bother defining the FP status register and | |
345 there are no other registers. | |
346 | |
347 Since $31 is always zero, we will use register number 31 as the | |
348 argument pointer. It will never appear in the generated code | |
349 because we will always be eliminating it in favor of the stack | |
350 pointer or hardware frame pointer. | |
351 | |
352 Likewise, we use $f31 for the frame pointer, which will always | |
353 be eliminated in favor of the hardware frame pointer or the | |
354 stack pointer. */ | |
355 | |
356 #define FIRST_PSEUDO_REGISTER 64 | |
357 | |
358 /* 1 for registers that have pervasive standard uses | |
359 and are not available for the register allocator. */ | |
360 | |
361 #define FIXED_REGISTERS \ | |
362 {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \ | |
363 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, \ | |
364 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \ | |
365 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1 } | |
366 | |
367 /* 1 for registers not available across function calls. | |
368 These must include the FIXED_REGISTERS and also any | |
369 registers that can be used without being saved. | |
370 The latter must include the registers where values are returned | |
371 and the register where structure-value addresses are passed. | |
372 Aside from that, you can include as many other registers as you like. */ | |
373 #define CALL_USED_REGISTERS \ | |
374 {1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, \ | |
375 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 1, 1, 1, 1, 1, \ | |
376 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, \ | |
377 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1 } | |
378 | |
379 /* List the order in which to allocate registers. Each register must be | |
380 listed once, even those in FIXED_REGISTERS. */ | |
381 | |
382 #define REG_ALLOC_ORDER { \ | |
383 1, 2, 3, 4, 5, 6, 7, 8, /* nonsaved integer registers */ \ | |
384 22, 23, 24, 25, 28, /* likewise */ \ | |
385 0, /* likewise, but return value */ \ | |
386 21, 20, 19, 18, 17, 16, /* likewise, but input args */ \ | |
387 27, /* likewise, but OSF procedure value */ \ | |
388 \ | |
389 42, 43, 44, 45, 46, 47, /* nonsaved floating-point registers */ \ | |
390 54, 55, 56, 57, 58, 59, /* likewise */ \ | |
391 60, 61, 62, /* likewise */ \ | |
392 32, 33, /* likewise, but return values */ \ | |
393 53, 52, 51, 50, 49, 48, /* likewise, but input args */ \ | |
394 \ | |
395 9, 10, 11, 12, 13, 14, /* saved integer registers */ \ | |
396 26, /* return address */ \ | |
397 15, /* hard frame pointer */ \ | |
398 \ | |
399 34, 35, 36, 37, 38, 39, /* saved floating-point registers */ \ | |
400 40, 41, /* likewise */ \ | |
401 \ | |
402 29, 30, 31, 63 /* gp, sp, ap, sfp */ \ | |
403 } | |
404 | |
405 /* Return number of consecutive hard regs needed starting at reg REGNO | |
406 to hold something of mode MODE. | |
407 This is ordinarily the length in words of a value of mode MODE | |
408 but can be less for certain modes in special long registers. */ | |
409 | |
410 #define HARD_REGNO_NREGS(REGNO, MODE) \ | |
411 ((GET_MODE_SIZE (MODE) + UNITS_PER_WORD - 1) / UNITS_PER_WORD) | |
412 | |
413 /* Value is 1 if hard register REGNO can hold a value of machine-mode MODE. | |
414 On Alpha, the integer registers can hold any mode. The floating-point | |
415 registers can hold 64-bit integers as well, but not smaller values. */ | |
416 | |
417 #define HARD_REGNO_MODE_OK(REGNO, MODE) \ | |
55
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
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diff
changeset
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418 (IN_RANGE ((REGNO), 32, 62) \ |
0 | 419 ? (MODE) == SFmode || (MODE) == DFmode || (MODE) == DImode \ |
420 || (MODE) == SCmode || (MODE) == DCmode \ | |
421 : 1) | |
422 | |
423 /* A C expression that is nonzero if a value of mode | |
424 MODE1 is accessible in mode MODE2 without copying. | |
425 | |
426 This asymmetric test is true when MODE1 could be put | |
427 in an FP register but MODE2 could not. */ | |
428 | |
429 #define MODES_TIEABLE_P(MODE1, MODE2) \ | |
430 (HARD_REGNO_MODE_OK (32, (MODE1)) \ | |
431 ? HARD_REGNO_MODE_OK (32, (MODE2)) \ | |
432 : 1) | |
433 | |
434 /* Specify the registers used for certain standard purposes. | |
435 The values of these macros are register numbers. */ | |
436 | |
437 /* Alpha pc isn't overloaded on a register that the compiler knows about. */ | |
438 /* #define PC_REGNUM */ | |
439 | |
440 /* Register to use for pushing function arguments. */ | |
441 #define STACK_POINTER_REGNUM 30 | |
442 | |
443 /* Base register for access to local variables of the function. */ | |
444 #define HARD_FRAME_POINTER_REGNUM 15 | |
445 | |
446 /* Base register for access to arguments of the function. */ | |
447 #define ARG_POINTER_REGNUM 31 | |
448 | |
449 /* Base register for access to local variables of function. */ | |
450 #define FRAME_POINTER_REGNUM 63 | |
451 | |
452 /* Register in which static-chain is passed to a function. | |
453 | |
454 For the Alpha, this is based on an example; the calling sequence | |
455 doesn't seem to specify this. */ | |
456 #define STATIC_CHAIN_REGNUM 1 | |
457 | |
458 /* The register number of the register used to address a table of | |
459 static data addresses in memory. */ | |
460 #define PIC_OFFSET_TABLE_REGNUM 29 | |
461 | |
462 /* Define this macro if the register defined by `PIC_OFFSET_TABLE_REGNUM' | |
463 is clobbered by calls. */ | |
464 /* ??? It is and it isn't. It's required to be valid for a given | |
465 function when the function returns. It isn't clobbered by | |
466 current_file functions. Moreover, we do not expose the ldgp | |
467 until after reload, so we're probably safe. */ | |
468 /* #define PIC_OFFSET_TABLE_REG_CALL_CLOBBERED */ | |
469 | |
470 /* Define the classes of registers for register constraints in the | |
471 machine description. Also define ranges of constants. | |
472 | |
473 One of the classes must always be named ALL_REGS and include all hard regs. | |
474 If there is more than one class, another class must be named NO_REGS | |
475 and contain no registers. | |
476 | |
477 The name GENERAL_REGS must be the name of a class (or an alias for | |
478 another name such as ALL_REGS). This is the class of registers | |
479 that is allowed by "g" or "r" in a register constraint. | |
480 Also, registers outside this class are allocated only when | |
481 instructions express preferences for them. | |
482 | |
483 The classes must be numbered in nondecreasing order; that is, | |
484 a larger-numbered class must never be contained completely | |
485 in a smaller-numbered class. | |
486 | |
487 For any two classes, it is very desirable that there be another | |
488 class that represents their union. */ | |
489 | |
490 enum reg_class { | |
491 NO_REGS, R0_REG, R24_REG, R25_REG, R27_REG, | |
492 GENERAL_REGS, FLOAT_REGS, ALL_REGS, | |
493 LIM_REG_CLASSES | |
494 }; | |
495 | |
496 #define N_REG_CLASSES (int) LIM_REG_CLASSES | |
497 | |
498 /* Give names of register classes as strings for dump file. */ | |
499 | |
500 #define REG_CLASS_NAMES \ | |
501 {"NO_REGS", "R0_REG", "R24_REG", "R25_REG", "R27_REG", \ | |
502 "GENERAL_REGS", "FLOAT_REGS", "ALL_REGS" } | |
503 | |
504 /* Define which registers fit in which classes. | |
505 This is an initializer for a vector of HARD_REG_SET | |
506 of length N_REG_CLASSES. */ | |
507 | |
508 #define REG_CLASS_CONTENTS \ | |
509 { {0x00000000, 0x00000000}, /* NO_REGS */ \ | |
510 {0x00000001, 0x00000000}, /* R0_REG */ \ | |
511 {0x01000000, 0x00000000}, /* R24_REG */ \ | |
512 {0x02000000, 0x00000000}, /* R25_REG */ \ | |
513 {0x08000000, 0x00000000}, /* R27_REG */ \ | |
514 {0xffffffff, 0x80000000}, /* GENERAL_REGS */ \ | |
515 {0x00000000, 0x7fffffff}, /* FLOAT_REGS */ \ | |
516 {0xffffffff, 0xffffffff} } | |
517 | |
518 /* The following macro defines cover classes for Integrated Register | |
519 Allocator. Cover classes is a set of non-intersected register | |
520 classes covering all hard registers used for register allocation | |
521 purpose. Any move between two registers of a cover class should be | |
522 cheaper than load or store of the registers. The macro value is | |
523 array of register classes with LIM_REG_CLASSES used as the end | |
524 marker. */ | |
525 | |
526 #define IRA_COVER_CLASSES \ | |
527 { \ | |
528 GENERAL_REGS, FLOAT_REGS, LIM_REG_CLASSES \ | |
529 } | |
530 | |
531 /* The same information, inverted: | |
532 Return the class number of the smallest class containing | |
533 reg number REGNO. This could be a conditional expression | |
534 or could index an array. */ | |
535 | |
536 #define REGNO_REG_CLASS(REGNO) \ | |
537 ((REGNO) == 0 ? R0_REG \ | |
538 : (REGNO) == 24 ? R24_REG \ | |
539 : (REGNO) == 25 ? R25_REG \ | |
540 : (REGNO) == 27 ? R27_REG \ | |
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541 : IN_RANGE ((REGNO), 32, 62) ? FLOAT_REGS \ |
0 | 542 : GENERAL_REGS) |
543 | |
544 /* The class value for index registers, and the one for base regs. */ | |
545 #define INDEX_REG_CLASS NO_REGS | |
546 #define BASE_REG_CLASS GENERAL_REGS | |
547 | |
548 /* Given an rtx X being reloaded into a reg required to be | |
549 in class CLASS, return the class of reg to actually use. | |
550 In general this is just CLASS; but on some machines | |
551 in some cases it is preferable to use a more restrictive class. */ | |
552 | |
553 #define PREFERRED_RELOAD_CLASS alpha_preferred_reload_class | |
554 | |
555 /* If we are copying between general and FP registers, we need a memory | |
556 location unless the FIX extension is available. */ | |
557 | |
558 #define SECONDARY_MEMORY_NEEDED(CLASS1,CLASS2,MODE) \ | |
559 (! TARGET_FIX && (((CLASS1) == FLOAT_REGS && (CLASS2) != FLOAT_REGS) \ | |
560 || ((CLASS2) == FLOAT_REGS && (CLASS1) != FLOAT_REGS))) | |
561 | |
562 /* Specify the mode to be used for memory when a secondary memory | |
563 location is needed. If MODE is floating-point, use it. Otherwise, | |
564 widen to a word like the default. This is needed because we always | |
565 store integers in FP registers in quadword format. This whole | |
566 area is very tricky! */ | |
567 #define SECONDARY_MEMORY_NEEDED_MODE(MODE) \ | |
568 (GET_MODE_CLASS (MODE) == MODE_FLOAT ? (MODE) \ | |
569 : GET_MODE_SIZE (MODE) >= 4 ? (MODE) \ | |
570 : mode_for_size (BITS_PER_WORD, GET_MODE_CLASS (MODE), 0)) | |
571 | |
572 /* Return the maximum number of consecutive registers | |
573 needed to represent mode MODE in a register of class CLASS. */ | |
574 | |
575 #define CLASS_MAX_NREGS(CLASS, MODE) \ | |
576 ((GET_MODE_SIZE (MODE) + UNITS_PER_WORD - 1) / UNITS_PER_WORD) | |
577 | |
578 /* Return the class of registers that cannot change mode from FROM to TO. */ | |
579 | |
580 #define CANNOT_CHANGE_MODE_CLASS(FROM, TO, CLASS) \ | |
581 (GET_MODE_SIZE (FROM) != GET_MODE_SIZE (TO) \ | |
582 ? reg_classes_intersect_p (FLOAT_REGS, CLASS) : 0) | |
583 | |
584 /* Define the cost of moving between registers of various classes. Moving | |
585 between FLOAT_REGS and anything else except float regs is expensive. | |
586 In fact, we make it quite expensive because we really don't want to | |
587 do these moves unless it is clearly worth it. Optimizations may | |
588 reduce the impact of not being able to allocate a pseudo to a | |
589 hard register. */ | |
590 | |
591 #define REGISTER_MOVE_COST(MODE, CLASS1, CLASS2) \ | |
592 (((CLASS1) == FLOAT_REGS) == ((CLASS2) == FLOAT_REGS) ? 2 \ | |
593 : TARGET_FIX ? ((CLASS1) == FLOAT_REGS ? 6 : 8) \ | |
594 : 4+2*alpha_memory_latency) | |
595 | |
596 /* A C expressions returning the cost of moving data of MODE from a register to | |
597 or from memory. | |
598 | |
599 On the Alpha, bump this up a bit. */ | |
600 | |
601 extern int alpha_memory_latency; | |
602 #define MEMORY_MOVE_COST(MODE,CLASS,IN) (2*alpha_memory_latency) | |
603 | |
604 /* Provide the cost of a branch. Exact meaning under development. */ | |
605 #define BRANCH_COST(speed_p, predictable_p) 5 | |
606 | |
607 /* Stack layout; function entry, exit and calling. */ | |
608 | |
609 /* Define this if pushing a word on the stack | |
610 makes the stack pointer a smaller address. */ | |
611 #define STACK_GROWS_DOWNWARD | |
612 | |
613 /* Define this to nonzero if the nominal address of the stack frame | |
614 is at the high-address end of the local variables; | |
615 that is, each additional local variable allocated | |
616 goes at a more negative offset in the frame. */ | |
617 /* #define FRAME_GROWS_DOWNWARD 0 */ | |
618 | |
619 /* Offset within stack frame to start allocating local variables at. | |
620 If FRAME_GROWS_DOWNWARD, this is the offset to the END of the | |
621 first local allocated. Otherwise, it is the offset to the BEGINNING | |
622 of the first local allocated. */ | |
623 | |
624 #define STARTING_FRAME_OFFSET 0 | |
625 | |
626 /* If we generate an insn to push BYTES bytes, | |
627 this says how many the stack pointer really advances by. | |
628 On Alpha, don't define this because there are no push insns. */ | |
629 /* #define PUSH_ROUNDING(BYTES) */ | |
630 | |
631 /* Define this to be nonzero if stack checking is built into the ABI. */ | |
632 #define STACK_CHECK_BUILTIN 1 | |
633 | |
634 /* Define this if the maximum size of all the outgoing args is to be | |
635 accumulated and pushed during the prologue. The amount can be | |
636 found in the variable crtl->outgoing_args_size. */ | |
637 #define ACCUMULATE_OUTGOING_ARGS 1 | |
638 | |
639 /* Offset of first parameter from the argument pointer register value. */ | |
640 | |
641 #define FIRST_PARM_OFFSET(FNDECL) 0 | |
642 | |
643 /* Definitions for register eliminations. | |
644 | |
645 We have two registers that can be eliminated on the Alpha. First, the | |
646 frame pointer register can often be eliminated in favor of the stack | |
647 pointer register. Secondly, the argument pointer register can always be | |
648 eliminated; it is replaced with either the stack or frame pointer. */ | |
649 | |
650 /* This is an array of structures. Each structure initializes one pair | |
651 of eliminable registers. The "from" register number is given first, | |
652 followed by "to". Eliminations of the same "from" register are listed | |
653 in order of preference. */ | |
654 | |
655 #define ELIMINABLE_REGS \ | |
656 {{ ARG_POINTER_REGNUM, STACK_POINTER_REGNUM}, \ | |
657 { ARG_POINTER_REGNUM, HARD_FRAME_POINTER_REGNUM}, \ | |
658 { FRAME_POINTER_REGNUM, STACK_POINTER_REGNUM}, \ | |
659 { FRAME_POINTER_REGNUM, HARD_FRAME_POINTER_REGNUM}} | |
660 | |
661 /* Round up to a multiple of 16 bytes. */ | |
662 #define ALPHA_ROUND(X) (((X) + 15) & ~ 15) | |
663 | |
664 /* Define the offset between two registers, one to be eliminated, and the other | |
665 its replacement, at the start of a routine. */ | |
666 #define INITIAL_ELIMINATION_OFFSET(FROM, TO, OFFSET) \ | |
667 ((OFFSET) = alpha_initial_elimination_offset(FROM, TO)) | |
668 | |
669 /* Define this if stack space is still allocated for a parameter passed | |
670 in a register. */ | |
671 /* #define REG_PARM_STACK_SPACE */ | |
672 | |
673 /* Define how to find the value returned by a function. | |
674 VALTYPE is the data type of the value (as a tree). | |
675 If the precise function being called is known, FUNC is its FUNCTION_DECL; | |
676 otherwise, FUNC is 0. | |
677 | |
678 On Alpha the value is found in $0 for integer functions and | |
679 $f0 for floating-point functions. */ | |
680 | |
681 #define FUNCTION_VALUE(VALTYPE, FUNC) \ | |
682 function_value (VALTYPE, FUNC, VOIDmode) | |
683 | |
684 /* Define how to find the value returned by a library function | |
685 assuming the value has mode MODE. */ | |
686 | |
687 #define LIBCALL_VALUE(MODE) \ | |
688 function_value (NULL, NULL, MODE) | |
689 | |
690 /* 1 if N is a possible register number for a function value | |
691 as seen by the caller. */ | |
692 | |
693 #define FUNCTION_VALUE_REGNO_P(N) \ | |
694 ((N) == 0 || (N) == 1 || (N) == 32 || (N) == 33) | |
695 | |
696 /* 1 if N is a possible register number for function argument passing. | |
697 On Alpha, these are $16-$21 and $f16-$f21. */ | |
698 | |
699 #define FUNCTION_ARG_REGNO_P(N) \ | |
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700 (IN_RANGE ((N), 16, 21) || ((N) >= 16 + 32 && (N) <= 21 + 32)) |
0 | 701 |
702 /* Define a data type for recording info about an argument list | |
703 during the scan of that argument list. This data type should | |
704 hold all necessary information about the function itself | |
705 and about the args processed so far, enough to enable macros | |
706 such as FUNCTION_ARG to determine where the next arg should go. | |
707 | |
708 On Alpha, this is a single integer, which is a number of words | |
709 of arguments scanned so far. | |
710 Thus 6 or more means all following args should go on the stack. */ | |
711 | |
712 #define CUMULATIVE_ARGS int | |
713 | |
714 /* Initialize a variable CUM of type CUMULATIVE_ARGS | |
715 for a call to a function whose data type is FNTYPE. | |
716 For a library call, FNTYPE is 0. */ | |
717 | |
718 #define INIT_CUMULATIVE_ARGS(CUM, FNTYPE, LIBNAME, INDIRECT, N_NAMED_ARGS) \ | |
719 (CUM) = 0 | |
720 | |
721 /* Define intermediate macro to compute the size (in registers) of an argument | |
722 for the Alpha. */ | |
723 | |
724 #define ALPHA_ARG_SIZE(MODE, TYPE, NAMED) \ | |
725 ((MODE) == TFmode || (MODE) == TCmode ? 1 \ | |
726 : (((MODE) == BLKmode ? int_size_in_bytes (TYPE) : GET_MODE_SIZE (MODE)) \ | |
727 + (UNITS_PER_WORD - 1)) / UNITS_PER_WORD) | |
728 | |
729 /* Make (or fake) .linkage entry for function call. | |
730 IS_LOCAL is 0 if name is used in call, 1 if name is used in definition. */ | |
731 | |
732 /* This macro defines the start of an assembly comment. */ | |
733 | |
734 #define ASM_COMMENT_START " #" | |
735 | |
736 /* This macro produces the initial definition of a function. */ | |
737 | |
738 #define ASM_DECLARE_FUNCTION_NAME(FILE,NAME,DECL) \ | |
739 alpha_start_function(FILE,NAME,DECL); | |
740 | |
741 /* This macro closes up a function definition for the assembler. */ | |
742 | |
743 #define ASM_DECLARE_FUNCTION_SIZE(FILE,NAME,DECL) \ | |
744 alpha_end_function(FILE,NAME,DECL) | |
745 | |
746 /* Output any profiling code before the prologue. */ | |
747 | |
748 #define PROFILE_BEFORE_PROLOGUE 1 | |
749 | |
750 /* Never use profile counters. */ | |
751 | |
752 #define NO_PROFILE_COUNTERS 1 | |
753 | |
754 /* Output assembler code to FILE to increment profiler label # LABELNO | |
755 for profiling a function entry. Under OSF/1, profiling is enabled | |
756 by simply passing -pg to the assembler and linker. */ | |
757 | |
758 #define FUNCTION_PROFILER(FILE, LABELNO) | |
759 | |
760 /* EXIT_IGNORE_STACK should be nonzero if, when returning from a function, | |
761 the stack pointer does not matter. The value is tested only in | |
762 functions that have frame pointers. | |
763 No definition is equivalent to always zero. */ | |
764 | |
765 #define EXIT_IGNORE_STACK 1 | |
766 | |
767 /* Define registers used by the epilogue and return instruction. */ | |
768 | |
769 #define EPILOGUE_USES(REGNO) ((REGNO) == 26) | |
770 | |
771 /* Length in units of the trampoline for entering a nested function. */ | |
772 | |
773 #define TRAMPOLINE_SIZE 32 | |
774 | |
775 /* The alignment of a trampoline, in bits. */ | |
776 | |
777 #define TRAMPOLINE_ALIGNMENT 64 | |
778 | |
779 /* A C expression whose value is RTL representing the value of the return | |
780 address for the frame COUNT steps up from the current frame. | |
781 FRAMEADDR is the frame pointer of the COUNT frame, or the frame pointer of | |
782 the COUNT-1 frame if RETURN_ADDR_IN_PREVIOUS_FRAME is defined. */ | |
783 | |
784 #define RETURN_ADDR_RTX alpha_return_addr | |
785 | |
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786 /* Provide a definition of DWARF_FRAME_REGNUM here so that fallback unwinders |
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787 can use DWARF_ALT_FRAME_RETURN_COLUMN defined below. This is just the same |
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788 as the default definition in dwarf2out.c. */ |
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789 #undef DWARF_FRAME_REGNUM |
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790 #define DWARF_FRAME_REGNUM(REG) DBX_REGISTER_NUMBER (REG) |
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791 |
0 | 792 /* Before the prologue, RA lives in $26. */ |
793 #define INCOMING_RETURN_ADDR_RTX gen_rtx_REG (Pmode, 26) | |
794 #define DWARF_FRAME_RETURN_COLUMN DWARF_FRAME_REGNUM (26) | |
795 #define DWARF_ALT_FRAME_RETURN_COLUMN DWARF_FRAME_REGNUM (64) | |
796 #define DWARF_ZERO_REG 31 | |
797 | |
798 /* Describe how we implement __builtin_eh_return. */ | |
799 #define EH_RETURN_DATA_REGNO(N) ((N) < 4 ? (N) + 16 : INVALID_REGNUM) | |
800 #define EH_RETURN_STACKADJ_RTX gen_rtx_REG (Pmode, 28) | |
801 #define EH_RETURN_HANDLER_RTX \ | |
802 gen_rtx_MEM (Pmode, plus_constant (stack_pointer_rtx, \ | |
803 crtl->outgoing_args_size)) | |
804 | |
805 /* Addressing modes, and classification of registers for them. */ | |
806 | |
807 /* Macros to check register numbers against specific register classes. */ | |
808 | |
809 /* These assume that REGNO is a hard or pseudo reg number. | |
810 They give nonzero only if REGNO is a hard reg of the suitable class | |
811 or a pseudo reg currently allocated to a suitable hard reg. | |
812 Since they use reg_renumber, they are safe only once reg_renumber | |
813 has been allocated, which happens in local-alloc.c. */ | |
814 | |
815 #define REGNO_OK_FOR_INDEX_P(REGNO) 0 | |
816 #define REGNO_OK_FOR_BASE_P(REGNO) \ | |
817 ((REGNO) < 32 || (unsigned) reg_renumber[REGNO] < 32 \ | |
818 || (REGNO) == 63 || reg_renumber[REGNO] == 63) | |
819 | |
820 /* Maximum number of registers that can appear in a valid memory address. */ | |
821 #define MAX_REGS_PER_ADDRESS 1 | |
822 | |
823 /* Recognize any constant value that is a valid address. For the Alpha, | |
824 there are only constants none since we want to use LDA to load any | |
825 symbolic addresses into registers. */ | |
826 | |
827 #define CONSTANT_ADDRESS_P(X) \ | |
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828 (CONST_INT_P (X) \ |
0 | 829 && (unsigned HOST_WIDE_INT) (INTVAL (X) + 0x8000) < 0x10000) |
830 | |
831 /* Include all constant integers and constant doubles, but not | |
832 floating-point, except for floating-point zero. */ | |
833 | |
834 #define LEGITIMATE_CONSTANT_P alpha_legitimate_constant_p | |
835 | |
836 /* The macros REG_OK_FOR..._P assume that the arg is a REG rtx | |
837 and check its validity for a certain class. | |
838 We have two alternate definitions for each of them. | |
839 The usual definition accepts all pseudo regs; the other rejects | |
840 them unless they have been allocated suitable hard regs. | |
841 The symbol REG_OK_STRICT causes the latter definition to be used. | |
842 | |
843 Most source files want to accept pseudo regs in the hope that | |
844 they will get allocated to the class that the insn wants them to be in. | |
845 Source files for reload pass need to be strict. | |
846 After reload, it makes no difference, since pseudo regs have | |
847 been eliminated by then. */ | |
848 | |
849 /* Nonzero if X is a hard reg that can be used as an index | |
850 or if it is a pseudo reg. */ | |
851 #define REG_OK_FOR_INDEX_P(X) 0 | |
852 | |
853 /* Nonzero if X is a hard reg that can be used as a base reg | |
854 or if it is a pseudo reg. */ | |
855 #define NONSTRICT_REG_OK_FOR_BASE_P(X) \ | |
856 (REGNO (X) < 32 || REGNO (X) == 63 || REGNO (X) >= FIRST_PSEUDO_REGISTER) | |
857 | |
858 /* ??? Nonzero if X is the frame pointer, or some virtual register | |
859 that may eliminate to the frame pointer. These will be allowed to | |
860 have offsets greater than 32K. This is done because register | |
861 elimination offsets will change the hi/lo split, and if we split | |
862 before reload, we will require additional instructions. */ | |
863 #define NONSTRICT_REG_OK_FP_BASE_P(X) \ | |
864 (REGNO (X) == 31 || REGNO (X) == 63 \ | |
865 || (REGNO (X) >= FIRST_PSEUDO_REGISTER \ | |
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866 && REGNO (X) < LAST_VIRTUAL_POINTER_REGISTER)) |
0 | 867 |
868 /* Nonzero if X is a hard reg that can be used as a base reg. */ | |
869 #define STRICT_REG_OK_FOR_BASE_P(X) REGNO_OK_FOR_BASE_P (REGNO (X)) | |
870 | |
871 #ifdef REG_OK_STRICT | |
872 #define REG_OK_FOR_BASE_P(X) STRICT_REG_OK_FOR_BASE_P (X) | |
873 #else | |
874 #define REG_OK_FOR_BASE_P(X) NONSTRICT_REG_OK_FOR_BASE_P (X) | |
875 #endif | |
876 | |
877 /* Try a machine-dependent way of reloading an illegitimate address | |
878 operand. If we find one, push the reload and jump to WIN. This | |
879 macro is used in only one place: `find_reloads_address' in reload.c. */ | |
880 | |
881 #define LEGITIMIZE_RELOAD_ADDRESS(X,MODE,OPNUM,TYPE,IND_L,WIN) \ | |
882 do { \ | |
883 rtx new_x = alpha_legitimize_reload_address (X, MODE, OPNUM, TYPE, IND_L); \ | |
884 if (new_x) \ | |
885 { \ | |
886 X = new_x; \ | |
887 goto WIN; \ | |
888 } \ | |
889 } while (0) | |
890 | |
891 /* Go to LABEL if ADDR (a legitimate address expression) | |
892 has an effect that depends on the machine mode it is used for. | |
893 On the Alpha this is true only for the unaligned modes. We can | |
894 simplify this test since we know that the address must be valid. */ | |
895 | |
896 #define GO_IF_MODE_DEPENDENT_ADDRESS(ADDR,LABEL) \ | |
897 { if (GET_CODE (ADDR) == AND) goto LABEL; } | |
898 | |
899 /* Specify the machine mode that this machine uses | |
900 for the index in the tablejump instruction. */ | |
901 #define CASE_VECTOR_MODE SImode | |
902 | |
903 /* Define as C expression which evaluates to nonzero if the tablejump | |
904 instruction expects the table to contain offsets from the address of the | |
905 table. | |
906 | |
907 Do not define this if the table should contain absolute addresses. | |
908 On the Alpha, the table is really GP-relative, not relative to the PC | |
909 of the table, but we pretend that it is PC-relative; this should be OK, | |
910 but we should try to find some better way sometime. */ | |
911 #define CASE_VECTOR_PC_RELATIVE 1 | |
912 | |
913 /* Define this as 1 if `char' should by default be signed; else as 0. */ | |
914 #define DEFAULT_SIGNED_CHAR 1 | |
915 | |
916 /* Max number of bytes we can move to or from memory | |
917 in one reasonably fast instruction. */ | |
918 | |
919 #define MOVE_MAX 8 | |
920 | |
921 /* If a memory-to-memory move would take MOVE_RATIO or more simple | |
922 move-instruction pairs, we will do a movmem or libcall instead. | |
923 | |
924 Without byte/word accesses, we want no more than four instructions; | |
925 with, several single byte accesses are better. */ | |
926 | |
927 #define MOVE_RATIO(speed) (TARGET_BWX ? 7 : 2) | |
928 | |
929 /* Largest number of bytes of an object that can be placed in a register. | |
930 On the Alpha we have plenty of registers, so use TImode. */ | |
931 #define MAX_FIXED_MODE_SIZE GET_MODE_BITSIZE (TImode) | |
932 | |
933 /* Nonzero if access to memory by bytes is no faster than for words. | |
934 Also nonzero if doing byte operations (specifically shifts) in registers | |
935 is undesirable. | |
936 | |
937 On the Alpha, we want to not use the byte operation and instead use | |
938 masking operations to access fields; these will save instructions. */ | |
939 | |
940 #define SLOW_BYTE_ACCESS 1 | |
941 | |
942 /* Define if operations between registers always perform the operation | |
943 on the full register even if a narrower mode is specified. */ | |
944 #define WORD_REGISTER_OPERATIONS | |
945 | |
946 /* Define if loading in MODE, an integral mode narrower than BITS_PER_WORD | |
947 will either zero-extend or sign-extend. The value of this macro should | |
948 be the code that says which one of the two operations is implicitly | |
949 done, UNKNOWN if none. */ | |
950 #define LOAD_EXTEND_OP(MODE) ((MODE) == SImode ? SIGN_EXTEND : ZERO_EXTEND) | |
951 | |
952 /* Define if loading short immediate values into registers sign extends. */ | |
953 #define SHORT_IMMEDIATES_SIGN_EXTEND | |
954 | |
955 /* Value is 1 if truncating an integer of INPREC bits to OUTPREC bits | |
956 is done just by pretending it is already truncated. */ | |
957 #define TRULY_NOOP_TRUNCATION(OUTPREC, INPREC) 1 | |
958 | |
959 /* The CIX ctlz and cttz instructions return 64 for zero. */ | |
960 #define CLZ_DEFINED_VALUE_AT_ZERO(MODE, VALUE) ((VALUE) = 64, TARGET_CIX) | |
961 #define CTZ_DEFINED_VALUE_AT_ZERO(MODE, VALUE) ((VALUE) = 64, TARGET_CIX) | |
962 | |
963 /* Define the value returned by a floating-point comparison instruction. */ | |
964 | |
965 #define FLOAT_STORE_FLAG_VALUE(MODE) \ | |
966 REAL_VALUE_ATOF ((TARGET_FLOAT_VAX ? "0.5" : "2.0"), (MODE)) | |
967 | |
968 /* Canonicalize a comparison from one we don't have to one we do have. */ | |
969 | |
970 #define CANONICALIZE_COMPARISON(CODE,OP0,OP1) \ | |
971 do { \ | |
972 if (((CODE) == GE || (CODE) == GT || (CODE) == GEU || (CODE) == GTU) \ | |
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973 && (REG_P (OP1) || (OP1) == const0_rtx)) \ |
0 | 974 { \ |
975 rtx tem = (OP0); \ | |
976 (OP0) = (OP1); \ | |
977 (OP1) = tem; \ | |
978 (CODE) = swap_condition (CODE); \ | |
979 } \ | |
980 if (((CODE) == LT || (CODE) == LTU) \ | |
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981 && CONST_INT_P (OP1) && INTVAL (OP1) == 256) \ |
0 | 982 { \ |
983 (CODE) = (CODE) == LT ? LE : LEU; \ | |
984 (OP1) = GEN_INT (255); \ | |
985 } \ | |
986 } while (0) | |
987 | |
988 /* Specify the machine mode that pointers have. | |
989 After generation of rtl, the compiler makes no further distinction | |
990 between pointers and any other objects of this machine mode. */ | |
991 #define Pmode DImode | |
992 | |
993 /* Mode of a function address in a call instruction (for indexing purposes). */ | |
994 | |
995 #define FUNCTION_MODE Pmode | |
996 | |
997 /* Define this if addresses of constant functions | |
998 shouldn't be put through pseudo regs where they can be cse'd. | |
999 Desirable on machines where ordinary constants are expensive | |
1000 but a CALL with constant address is cheap. | |
1001 | |
1002 We define this on the Alpha so that gen_call and gen_call_value | |
1003 get to see the SYMBOL_REF (for the hint field of the jsr). It will | |
1004 then copy it into a register, thus actually letting the address be | |
1005 cse'ed. */ | |
1006 | |
1007 #define NO_FUNCTION_CSE | |
1008 | |
1009 /* Define this to be nonzero if shift instructions ignore all but the low-order | |
1010 few bits. */ | |
1011 #define SHIFT_COUNT_TRUNCATED 1 | |
1012 | |
1013 /* Control the assembler format that we output. */ | |
1014 | |
1015 /* Output to assembler file text saying following lines | |
1016 may contain character constants, extra white space, comments, etc. */ | |
1017 #define ASM_APP_ON (TARGET_EXPLICIT_RELOCS ? "\t.set\tmacro\n" : "") | |
1018 | |
1019 /* Output to assembler file text saying following lines | |
1020 no longer contain unusual constructs. */ | |
1021 #define ASM_APP_OFF (TARGET_EXPLICIT_RELOCS ? "\t.set\tnomacro\n" : "") | |
1022 | |
1023 #define TEXT_SECTION_ASM_OP "\t.text" | |
1024 | |
1025 /* Output before read-only data. */ | |
1026 | |
1027 #define READONLY_DATA_SECTION_ASM_OP "\t.rdata" | |
1028 | |
1029 /* Output before writable data. */ | |
1030 | |
1031 #define DATA_SECTION_ASM_OP "\t.data" | |
1032 | |
1033 /* How to refer to registers in assembler output. | |
1034 This sequence is indexed by compiler's hard-register-number (see above). */ | |
1035 | |
1036 #define REGISTER_NAMES \ | |
1037 {"$0", "$1", "$2", "$3", "$4", "$5", "$6", "$7", "$8", \ | |
1038 "$9", "$10", "$11", "$12", "$13", "$14", "$15", \ | |
1039 "$16", "$17", "$18", "$19", "$20", "$21", "$22", "$23", \ | |
1040 "$24", "$25", "$26", "$27", "$28", "$29", "$30", "AP", \ | |
1041 "$f0", "$f1", "$f2", "$f3", "$f4", "$f5", "$f6", "$f7", "$f8", \ | |
1042 "$f9", "$f10", "$f11", "$f12", "$f13", "$f14", "$f15", \ | |
1043 "$f16", "$f17", "$f18", "$f19", "$f20", "$f21", "$f22", "$f23",\ | |
1044 "$f24", "$f25", "$f26", "$f27", "$f28", "$f29", "$f30", "FP"} | |
1045 | |
1046 /* Strip name encoding when emitting labels. */ | |
1047 | |
1048 #define ASM_OUTPUT_LABELREF(STREAM, NAME) \ | |
1049 do { \ | |
1050 const char *name_ = NAME; \ | |
1051 if (*name_ == '@' || *name_ == '%') \ | |
1052 name_ += 2; \ | |
1053 if (*name_ == '*') \ | |
1054 name_++; \ | |
1055 else \ | |
1056 fputs (user_label_prefix, STREAM); \ | |
1057 fputs (name_, STREAM); \ | |
1058 } while (0) | |
1059 | |
1060 /* Globalizing directive for a label. */ | |
1061 #define GLOBAL_ASM_OP "\t.globl " | |
1062 | |
1063 /* The prefix to add to user-visible assembler symbols. */ | |
1064 | |
1065 #define USER_LABEL_PREFIX "" | |
1066 | |
1067 /* This is how to output a label for a jump table. Arguments are the same as | |
1068 for (*targetm.asm_out.internal_label), except the insn for the jump table is | |
1069 passed. */ | |
1070 | |
1071 #define ASM_OUTPUT_CASE_LABEL(FILE,PREFIX,NUM,TABLEINSN) \ | |
1072 { ASM_OUTPUT_ALIGN (FILE, 2); (*targetm.asm_out.internal_label) (FILE, PREFIX, NUM); } | |
1073 | |
1074 /* This is how to store into the string LABEL | |
1075 the symbol_ref name of an internal numbered label where | |
1076 PREFIX is the class of label and NUM is the number within the class. | |
1077 This is suitable for output with `assemble_name'. */ | |
1078 | |
1079 #define ASM_GENERATE_INTERNAL_LABEL(LABEL,PREFIX,NUM) \ | |
1080 sprintf ((LABEL), "*$%s%ld", (PREFIX), (long)(NUM)) | |
1081 | |
1082 /* We use the default ASCII-output routine, except that we don't write more | |
1083 than 50 characters since the assembler doesn't support very long lines. */ | |
1084 | |
1085 #define ASM_OUTPUT_ASCII(MYFILE, MYSTRING, MYLENGTH) \ | |
1086 do { \ | |
1087 FILE *_hide_asm_out_file = (MYFILE); \ | |
1088 const unsigned char *_hide_p = (const unsigned char *) (MYSTRING); \ | |
1089 int _hide_thissize = (MYLENGTH); \ | |
1090 int _size_so_far = 0; \ | |
1091 { \ | |
1092 FILE *asm_out_file = _hide_asm_out_file; \ | |
1093 const unsigned char *p = _hide_p; \ | |
1094 int thissize = _hide_thissize; \ | |
1095 int i; \ | |
1096 fprintf (asm_out_file, "\t.ascii \""); \ | |
1097 \ | |
1098 for (i = 0; i < thissize; i++) \ | |
1099 { \ | |
1100 register int c = p[i]; \ | |
1101 \ | |
1102 if (_size_so_far ++ > 50 && i < thissize - 4) \ | |
1103 _size_so_far = 0, fprintf (asm_out_file, "\"\n\t.ascii \""); \ | |
1104 \ | |
1105 if (c == '\"' || c == '\\') \ | |
1106 putc ('\\', asm_out_file); \ | |
1107 if (c >= ' ' && c < 0177) \ | |
1108 putc (c, asm_out_file); \ | |
1109 else \ | |
1110 { \ | |
1111 fprintf (asm_out_file, "\\%o", c); \ | |
1112 /* After an octal-escape, if a digit follows, \ | |
1113 terminate one string constant and start another. \ | |
1114 The VAX assembler fails to stop reading the escape \ | |
1115 after three digits, so this is the only way we \ | |
1116 can get it to parse the data properly. */ \ | |
1117 if (i < thissize - 1 && ISDIGIT (p[i + 1])) \ | |
1118 _size_so_far = 0, fprintf (asm_out_file, "\"\n\t.ascii \""); \ | |
1119 } \ | |
1120 } \ | |
1121 fprintf (asm_out_file, "\"\n"); \ | |
1122 } \ | |
1123 } \ | |
1124 while (0) | |
1125 | |
1126 /* This is how to output an element of a case-vector that is relative. */ | |
1127 | |
1128 #define ASM_OUTPUT_ADDR_DIFF_ELT(FILE, BODY, VALUE, REL) \ | |
1129 fprintf (FILE, "\t.%s $L%d\n", TARGET_ABI_WINDOWS_NT ? "long" : "gprel32", \ | |
1130 (VALUE)) | |
1131 | |
1132 /* This is how to output an assembler line | |
1133 that says to advance the location counter | |
1134 to a multiple of 2**LOG bytes. */ | |
1135 | |
1136 #define ASM_OUTPUT_ALIGN(FILE,LOG) \ | |
1137 if ((LOG) != 0) \ | |
1138 fprintf (FILE, "\t.align %d\n", LOG); | |
1139 | |
1140 /* This is how to advance the location counter by SIZE bytes. */ | |
1141 | |
1142 #define ASM_OUTPUT_SKIP(FILE,SIZE) \ | |
1143 fprintf (FILE, "\t.space "HOST_WIDE_INT_PRINT_UNSIGNED"\n", (SIZE)) | |
1144 | |
1145 /* This says how to output an assembler line | |
1146 to define a global common symbol. */ | |
1147 | |
1148 #define ASM_OUTPUT_COMMON(FILE, NAME, SIZE, ROUNDED) \ | |
1149 ( fputs ("\t.comm ", (FILE)), \ | |
1150 assemble_name ((FILE), (NAME)), \ | |
1151 fprintf ((FILE), ","HOST_WIDE_INT_PRINT_UNSIGNED"\n", (SIZE))) | |
1152 | |
1153 /* This says how to output an assembler line | |
1154 to define a local common symbol. */ | |
1155 | |
1156 #define ASM_OUTPUT_LOCAL(FILE, NAME, SIZE,ROUNDED) \ | |
1157 ( fputs ("\t.lcomm ", (FILE)), \ | |
1158 assemble_name ((FILE), (NAME)), \ | |
1159 fprintf ((FILE), ","HOST_WIDE_INT_PRINT_UNSIGNED"\n", (SIZE))) | |
1160 | |
1161 | |
1162 /* Print operand X (an rtx) in assembler syntax to file FILE. | |
1163 CODE is a letter or dot (`z' in `%z0') or 0 if no letter was specified. | |
1164 For `%' followed by punctuation, CODE is the punctuation and X is null. */ | |
1165 | |
1166 #define PRINT_OPERAND(FILE, X, CODE) print_operand (FILE, X, CODE) | |
1167 | |
1168 /* Determine which codes are valid without a following integer. These must | |
1169 not be alphabetic. | |
1170 | |
1171 ~ Generates the name of the current function. | |
1172 | |
1173 / Generates the instruction suffix. The TRAP_SUFFIX and ROUND_SUFFIX | |
1174 attributes are examined to determine what is appropriate. | |
1175 | |
1176 , Generates single precision suffix for floating point | |
1177 instructions (s for IEEE, f for VAX) | |
1178 | |
1179 - Generates double precision suffix for floating point | |
1180 instructions (t for IEEE, g for VAX) | |
1181 */ | |
1182 | |
1183 #define PRINT_OPERAND_PUNCT_VALID_P(CODE) \ | |
1184 ((CODE) == '/' || (CODE) == ',' || (CODE) == '-' || (CODE) == '~' \ | |
1185 || (CODE) == '#' || (CODE) == '*' || (CODE) == '&') | |
1186 | |
1187 /* Print a memory address as an operand to reference that memory location. */ | |
1188 | |
1189 #define PRINT_OPERAND_ADDRESS(FILE, ADDR) \ | |
1190 print_operand_address((FILE), (ADDR)) | |
1191 | |
1192 /* Tell collect that the object format is ECOFF. */ | |
1193 #define OBJECT_FORMAT_COFF | |
1194 #define EXTENDED_COFF | |
1195 | |
1196 /* If we use NM, pass -g to it so it only lists globals. */ | |
1197 #define NM_FLAGS "-pg" | |
1198 | |
1199 /* Definitions for debugging. */ | |
1200 | |
1201 #define SDB_DEBUGGING_INFO 1 /* generate info for mips-tfile */ | |
1202 #define DBX_DEBUGGING_INFO 1 /* generate embedded stabs */ | |
1203 #define MIPS_DEBUGGING_INFO 1 /* MIPS specific debugging info */ | |
1204 | |
1205 #ifndef PREFERRED_DEBUGGING_TYPE /* assume SDB_DEBUGGING_INFO */ | |
1206 #define PREFERRED_DEBUGGING_TYPE SDB_DEBUG | |
1207 #endif | |
1208 | |
1209 | |
1210 /* Correct the offset of automatic variables and arguments. Note that | |
1211 the Alpha debug format wants all automatic variables and arguments | |
1212 to be in terms of two different offsets from the virtual frame pointer, | |
1213 which is the stack pointer before any adjustment in the function. | |
1214 The offset for the argument pointer is fixed for the native compiler, | |
1215 it is either zero (for the no arguments case) or large enough to hold | |
1216 all argument registers. | |
1217 The offset for the auto pointer is the fourth argument to the .frame | |
1218 directive (local_offset). | |
1219 To stay compatible with the native tools we use the same offsets | |
1220 from the virtual frame pointer and adjust the debugger arg/auto offsets | |
1221 accordingly. These debugger offsets are set up in output_prolog. */ | |
1222 | |
1223 extern long alpha_arg_offset; | |
1224 extern long alpha_auto_offset; | |
1225 #define DEBUGGER_AUTO_OFFSET(X) \ | |
1226 ((GET_CODE (X) == PLUS ? INTVAL (XEXP (X, 1)) : 0) + alpha_auto_offset) | |
1227 #define DEBUGGER_ARG_OFFSET(OFFSET, X) (OFFSET + alpha_arg_offset) | |
1228 | |
1229 /* mips-tfile doesn't understand .stabd directives. */ | |
1230 #define DBX_OUTPUT_SOURCE_LINE(STREAM, LINE, COUNTER) do { \ | |
1231 dbxout_begin_stabn_sline (LINE); \ | |
1232 dbxout_stab_value_internal_label ("LM", &COUNTER); \ | |
1233 } while (0) | |
1234 | |
1235 /* We want to use MIPS-style .loc directives for SDB line numbers. */ | |
1236 extern int num_source_filenames; | |
1237 #define SDB_OUTPUT_SOURCE_LINE(STREAM, LINE) \ | |
1238 fprintf (STREAM, "\t.loc\t%d %d\n", num_source_filenames, LINE) | |
1239 | |
1240 #define ASM_OUTPUT_SOURCE_FILENAME(STREAM, NAME) \ | |
1241 alpha_output_filename (STREAM, NAME) | |
1242 | |
1243 /* mips-tfile.c limits us to strings of one page. We must underestimate this | |
1244 number, because the real length runs past this up to the next | |
1245 continuation point. This is really a dbxout.c bug. */ | |
1246 #define DBX_CONTIN_LENGTH 3000 | |
1247 | |
1248 /* By default, turn on GDB extensions. */ | |
1249 #define DEFAULT_GDB_EXTENSIONS 1 | |
1250 | |
1251 /* Stabs-in-ECOFF can't handle dbxout_function_end(). */ | |
1252 #define NO_DBX_FUNCTION_END 1 | |
1253 | |
1254 /* If we are smuggling stabs through the ALPHA ECOFF object | |
1255 format, put a comment in front of the .stab<x> operation so | |
1256 that the ALPHA assembler does not choke. The mips-tfile program | |
1257 will correctly put the stab into the object file. */ | |
1258 | |
1259 #define ASM_STABS_OP ((TARGET_GAS) ? "\t.stabs\t" : " #.stabs\t") | |
1260 #define ASM_STABN_OP ((TARGET_GAS) ? "\t.stabn\t" : " #.stabn\t") | |
1261 #define ASM_STABD_OP ((TARGET_GAS) ? "\t.stabd\t" : " #.stabd\t") | |
1262 | |
1263 /* Forward references to tags are allowed. */ | |
1264 #define SDB_ALLOW_FORWARD_REFERENCES | |
1265 | |
1266 /* Unknown tags are also allowed. */ | |
1267 #define SDB_ALLOW_UNKNOWN_REFERENCES | |
1268 | |
1269 #define PUT_SDB_DEF(a) \ | |
1270 do { \ | |
1271 fprintf (asm_out_file, "\t%s.def\t", \ | |
1272 (TARGET_GAS) ? "" : "#"); \ | |
1273 ASM_OUTPUT_LABELREF (asm_out_file, a); \ | |
1274 fputc (';', asm_out_file); \ | |
1275 } while (0) | |
1276 | |
1277 #define PUT_SDB_PLAIN_DEF(a) \ | |
1278 do { \ | |
1279 fprintf (asm_out_file, "\t%s.def\t.%s;", \ | |
1280 (TARGET_GAS) ? "" : "#", (a)); \ | |
1281 } while (0) | |
1282 | |
1283 #define PUT_SDB_TYPE(a) \ | |
1284 do { \ | |
1285 fprintf (asm_out_file, "\t.type\t0x%x;", (a)); \ | |
1286 } while (0) | |
1287 | |
1288 /* For block start and end, we create labels, so that | |
1289 later we can figure out where the correct offset is. | |
1290 The normal .ent/.end serve well enough for functions, | |
1291 so those are just commented out. */ | |
1292 | |
1293 extern int sdb_label_count; /* block start/end next label # */ | |
1294 | |
1295 #define PUT_SDB_BLOCK_START(LINE) \ | |
1296 do { \ | |
1297 fprintf (asm_out_file, \ | |
1298 "$Lb%d:\n\t%s.begin\t$Lb%d\t%d\n", \ | |
1299 sdb_label_count, \ | |
1300 (TARGET_GAS) ? "" : "#", \ | |
1301 sdb_label_count, \ | |
1302 (LINE)); \ | |
1303 sdb_label_count++; \ | |
1304 } while (0) | |
1305 | |
1306 #define PUT_SDB_BLOCK_END(LINE) \ | |
1307 do { \ | |
1308 fprintf (asm_out_file, \ | |
1309 "$Le%d:\n\t%s.bend\t$Le%d\t%d\n", \ | |
1310 sdb_label_count, \ | |
1311 (TARGET_GAS) ? "" : "#", \ | |
1312 sdb_label_count, \ | |
1313 (LINE)); \ | |
1314 sdb_label_count++; \ | |
1315 } while (0) | |
1316 | |
1317 #define PUT_SDB_FUNCTION_START(LINE) | |
1318 | |
1319 #define PUT_SDB_FUNCTION_END(LINE) | |
1320 | |
1321 #define PUT_SDB_EPILOGUE_END(NAME) ((void)(NAME)) | |
1322 | |
1323 /* Macros for mips-tfile.c to encapsulate stabs in ECOFF, and for | |
1324 mips-tdump.c to print them out. | |
1325 | |
1326 These must match the corresponding definitions in gdb/mipsread.c. | |
1327 Unfortunately, gcc and gdb do not currently share any directories. */ | |
1328 | |
1329 #define CODE_MASK 0x8F300 | |
1330 #define MIPS_IS_STAB(sym) (((sym)->index & 0xFFF00) == CODE_MASK) | |
1331 #define MIPS_MARK_STAB(code) ((code)+CODE_MASK) | |
1332 #define MIPS_UNMARK_STAB(code) ((code)-CODE_MASK) | |
1333 | |
1334 /* Override some mips-tfile definitions. */ | |
1335 | |
1336 #define SHASH_SIZE 511 | |
1337 #define THASH_SIZE 55 | |
1338 | |
1339 /* Align ecoff symbol tables to avoid OSF1/1.3 nm complaints. */ | |
1340 | |
1341 #define ALIGN_SYMTABLE_OFFSET(OFFSET) (((OFFSET) + 7) & ~7) | |
1342 | |
1343 /* The system headers under Alpha systems are generally C++-aware. */ | |
1344 #define NO_IMPLICIT_EXTERN_C |