Mercurial > hg > CbC > CbC_gcc
annotate gcc/config/vax/vax.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. VAX version. |
2 Copyright (C) 1987, 1988, 1991, 1993, 1994, 1995, 1996, 1997, 1998, | |
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3 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2007, 2008, 2009, 2010 |
0 | 4 Free Software Foundation, Inc. |
5 | |
6 This file is part of GCC. | |
7 | |
8 GCC is free software; you can redistribute it and/or modify | |
9 it under the terms of the GNU General Public License as published by | |
10 the Free Software Foundation; either version 3, or (at your option) | |
11 any later version. | |
12 | |
13 GCC is distributed in the hope that it will be useful, | |
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 | |
19 along with GCC; see the file COPYING3. If not see | |
20 <http://www.gnu.org/licenses/>. */ | |
21 | |
22 | |
23 /* Target CPU builtins. */ | |
24 #define TARGET_CPU_CPP_BUILTINS() \ | |
25 do \ | |
26 { \ | |
27 builtin_define ("__vax__"); \ | |
28 builtin_assert ("cpu=vax"); \ | |
29 builtin_assert ("machine=vax"); \ | |
30 if (TARGET_G_FLOAT) \ | |
31 { \ | |
32 builtin_define ("__GFLOAT"); \ | |
33 builtin_define ("__GFLOAT__"); \ | |
34 } \ | |
35 } \ | |
36 while (0) | |
37 | |
38 #define VMS_TARGET 0 | |
39 | |
40 /* Use -J option for long branch support with Unix assembler. */ | |
41 | |
42 #define ASM_SPEC "-J" | |
43 | |
44 /* Choose proper libraries depending on float format. | |
45 Note that there are no profiling libraries for g-format. | |
46 Also use -lg for the sake of dbx. */ | |
47 | |
48 #define LIB_SPEC "%{g:-lg}\ | |
49 %{mg:%{lm:-lmg} -lcg \ | |
50 %{p:%eprofiling not supported with -mg\n}\ | |
51 %{pg:%eprofiling not supported with -mg\n}}\ | |
52 %{!mg:%{!p:%{!pg:-lc}}%{p:-lc_p}%{pg:-lc_p}}" | |
53 | |
54 /* Print subsidiary information on the compiler version in use. */ | |
55 | |
56 #ifndef TARGET_NAME /* A more specific value might be supplied via -D. */ | |
57 #define TARGET_NAME "vax" | |
58 #endif | |
59 #define TARGET_VERSION fprintf (stderr, " (%s)", TARGET_NAME) | |
60 | |
61 /* Run-time compilation parameters selecting different hardware subsets. */ | |
62 | |
63 /* Nonzero if ELF. Redefined by vax/elf.h. */ | |
64 #define TARGET_ELF 0 | |
65 | |
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66 /* Use BSD names for udiv and umod libgcc calls. */ |
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67 #define TARGET_BSD_DIVMOD 1 |
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68 |
0 | 69 /* Default target_flags if no switches specified. */ |
70 | |
71 #ifndef TARGET_DEFAULT | |
72 #define TARGET_DEFAULT (MASK_UNIX_ASM) | |
73 #endif | |
74 | |
75 | |
76 /* Target machine storage layout */ | |
77 | |
78 /* Define this if most significant bit is lowest numbered | |
79 in instructions that operate on numbered bit-fields. | |
80 This is not true on the VAX. */ | |
81 #define BITS_BIG_ENDIAN 0 | |
82 | |
83 /* Define this if most significant byte of a word is the lowest numbered. */ | |
84 /* That is not true on the VAX. */ | |
85 #define BYTES_BIG_ENDIAN 0 | |
86 | |
87 /* Define this if most significant word of a multiword number is the lowest | |
88 numbered. */ | |
89 /* This is not true on the VAX. */ | |
90 #define WORDS_BIG_ENDIAN 0 | |
91 | |
92 /* Width of a word, in units (bytes). */ | |
93 #define UNITS_PER_WORD 4 | |
94 | |
95 /* Allocation boundary (in *bits*) for storing arguments in argument list. */ | |
96 #define PARM_BOUNDARY 32 | |
97 | |
98 /* Allocation boundary (in *bits*) for the code of a function. */ | |
99 #define FUNCTION_BOUNDARY 16 | |
100 | |
101 /* Alignment of field after `int : 0' in a structure. */ | |
102 #define EMPTY_FIELD_BOUNDARY (TARGET_VAXC_ALIGNMENT ? 8 : 32) | |
103 | |
104 /* Every structure's size must be a multiple of this. */ | |
105 #define STRUCTURE_SIZE_BOUNDARY 8 | |
106 | |
107 /* A bit-field declared as `int' forces `int' alignment for the struct. */ | |
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108 #define PCC_BITFIELD_TYPE_MATTERS (! TARGET_VAXC_ALIGNMENT) |
0 | 109 |
110 /* No data type wants to be aligned rounder than this. */ | |
111 #define BIGGEST_ALIGNMENT 32 | |
112 | |
113 /* No structure field wants to be aligned rounder than this. */ | |
114 #define BIGGEST_FIELD_ALIGNMENT (TARGET_VAXC_ALIGNMENT ? 8 : 32) | |
115 | |
116 /* Set this nonzero if move instructions will actually fail to work | |
117 when given unaligned data. */ | |
118 #define STRICT_ALIGNMENT 0 | |
119 | |
120 /* Let's keep the stack somewhat aligned. */ | |
121 #define STACK_BOUNDARY 32 | |
122 | |
123 /* The table of an ADDR_DIFF_VEC must be contiguous with the case | |
124 opcode, it is part of the case instruction. */ | |
125 #define ADDR_VEC_ALIGN(ADDR_VEC) 0 | |
126 | |
127 /* Standard register usage. */ | |
128 | |
129 /* Number of actual hardware registers. | |
130 The hardware registers are assigned numbers for the compiler | |
131 from 0 to just below FIRST_PSEUDO_REGISTER. | |
132 All registers that the compiler knows about must be given numbers, | |
133 even those that are not normally considered general registers. */ | |
134 #define FIRST_PSEUDO_REGISTER 16 | |
135 | |
136 /* 1 for registers that have pervasive standard uses | |
137 and are not available for the register allocator. | |
138 On the VAX, these are the AP, FP, SP and PC. */ | |
139 #define FIXED_REGISTERS {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1} | |
140 | |
141 /* 1 for registers not available across function calls. | |
142 These must include the FIXED_REGISTERS and also any | |
143 registers that can be used without being saved. | |
144 The latter must include the registers where values are returned | |
145 and the register where structure-value addresses are passed. | |
146 Aside from that, you can include as many other registers as you like. */ | |
147 #define CALL_USED_REGISTERS {1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1} | |
148 | |
149 /* Return number of consecutive hard regs needed starting at reg REGNO | |
150 to hold something of mode MODE. | |
151 This is ordinarily the length in words of a value of mode MODE | |
152 but can be less for certain modes in special long registers. | |
153 On the VAX, all registers are one word long. */ | |
154 #define HARD_REGNO_NREGS(REGNO, MODE) \ | |
155 ((GET_MODE_SIZE (MODE) + UNITS_PER_WORD - 1) / UNITS_PER_WORD) | |
156 | |
157 /* Value is 1 if hard register REGNO can hold a value of machine-mode MODE. | |
158 On the VAX, all registers can hold all modes. */ | |
159 #define HARD_REGNO_MODE_OK(REGNO, MODE) 1 | |
160 | |
161 /* Value is 1 if it is a good idea to tie two pseudo registers | |
162 when one has mode MODE1 and one has mode MODE2. | |
163 If HARD_REGNO_MODE_OK could produce different values for MODE1 and MODE2, | |
164 for any hard reg, then this must be 0 for correct output. */ | |
165 #define MODES_TIEABLE_P(MODE1, MODE2) 1 | |
166 | |
167 /* Specify the registers used for certain standard purposes. | |
168 The values of these macros are register numbers. */ | |
169 | |
170 /* VAX pc is overloaded on a register. */ | |
171 #define PC_REGNUM VAX_PC_REGNUM | |
172 | |
173 /* Register to use for pushing function arguments. */ | |
174 #define STACK_POINTER_REGNUM VAX_SP_REGNUM | |
175 | |
176 /* Base register for access to local variables of the function. */ | |
177 #define FRAME_POINTER_REGNUM VAX_FP_REGNUM | |
178 | |
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179 /* Offset from the frame pointer register value to the top of stack. */ |
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180 #define FRAME_POINTER_CFA_OFFSET(FNDECL) 0 |
0 | 181 |
182 /* Base register for access to arguments of the function. */ | |
183 #define ARG_POINTER_REGNUM VAX_AP_REGNUM | |
184 | |
185 /* Register in which static-chain is passed to a function. */ | |
186 #define STATIC_CHAIN_REGNUM 0 | |
187 | |
188 /* Register in which address to store a structure value | |
189 is passed to a function. */ | |
190 #define VAX_STRUCT_VALUE_REGNUM 1 | |
191 | |
192 /* Define the classes of registers for register constraints in the | |
193 machine description. Also define ranges of constants. | |
194 | |
195 One of the classes must always be named ALL_REGS and include all hard regs. | |
196 If there is more than one class, another class must be named NO_REGS | |
197 and contain no registers. | |
198 | |
199 The name GENERAL_REGS must be the name of a class (or an alias for | |
200 another name such as ALL_REGS). This is the class of registers | |
201 that is allowed by "g" or "r" in a register constraint. | |
202 Also, registers outside this class are allocated only when | |
203 instructions express preferences for them. | |
204 | |
205 The classes must be numbered in nondecreasing order; that is, | |
206 a larger-numbered class must never be contained completely | |
207 in a smaller-numbered class. | |
208 | |
209 For any two classes, it is very desirable that there be another | |
210 class that represents their union. */ | |
211 | |
212 /* The VAX has only one kind of registers, so NO_REGS and ALL_REGS | |
213 are the only classes. */ | |
214 | |
215 enum reg_class { NO_REGS, ALL_REGS, LIM_REG_CLASSES }; | |
216 | |
217 #define N_REG_CLASSES (int) LIM_REG_CLASSES | |
218 | |
219 /* Since GENERAL_REGS is the same class as ALL_REGS, | |
220 don't give it a different class number; just make it an alias. */ | |
221 | |
222 #define GENERAL_REGS ALL_REGS | |
223 | |
224 /* Give names of register classes as strings for dump file. */ | |
225 | |
226 #define REG_CLASS_NAMES \ | |
227 { "NO_REGS", "ALL_REGS" } | |
228 | |
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229 /* The following macro defines cover classes for Integrated Register |
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230 Allocator. Cover classes is a set of non-intersected register |
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231 classes covering all hard registers used for register allocation |
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232 purpose. Any move between two registers of a cover class should be |
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233 cheaper than load or store of the registers. The macro value is |
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234 array of register classes with LIM_REG_CLASSES used as the end |
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235 marker. */ |
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236 #define IRA_COVER_CLASSES { ALL_REGS, LIM_REG_CLASSES } |
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237 |
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238 /* Return the maximum number of consecutive registers |
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239 needed to represent mode MODE in a register of class CLASS. */ |
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240 #define CLASS_MAX_NREGS(CLASS, MODE) \ |
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241 ((GET_MODE_SIZE (MODE) + UNITS_PER_WORD - 1) / UNITS_PER_WORD) |
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242 |
0 | 243 /* Define which registers fit in which classes. |
244 This is an initializer for a vector of HARD_REG_SET | |
245 of length N_REG_CLASSES. */ | |
246 | |
247 #define REG_CLASS_CONTENTS {{0}, {0xffff}} | |
248 | |
249 /* The same information, inverted: | |
250 Return the class number of the smallest class containing | |
251 reg number REGNO. This could be a conditional expression | |
252 or could index an array. */ | |
253 | |
254 #define REGNO_REG_CLASS(REGNO) ALL_REGS | |
255 | |
256 /* The class value for index registers, and the one for base regs. */ | |
257 | |
258 #define INDEX_REG_CLASS ALL_REGS | |
259 #define BASE_REG_CLASS ALL_REGS | |
260 | |
261 /* Return the maximum number of consecutive registers | |
262 needed to represent mode MODE in a register of class CLASS. */ | |
263 /* On the VAX, this is always the size of MODE in words, | |
264 since all registers are the same size. */ | |
265 #define CLASS_MAX_NREGS(CLASS, MODE) \ | |
266 ((GET_MODE_SIZE (MODE) + UNITS_PER_WORD - 1) / UNITS_PER_WORD) | |
267 | |
268 /* Stack layout; function entry, exit and calling. */ | |
269 | |
270 /* Define this if pushing a word on the stack | |
271 makes the stack pointer a smaller address. */ | |
272 #define STACK_GROWS_DOWNWARD | |
273 | |
274 /* Define this to nonzero if the nominal address of the stack frame | |
275 is at the high-address end of the local variables; | |
276 that is, each additional local variable allocated | |
277 goes at a more negative offset in the frame. */ | |
278 #define FRAME_GROWS_DOWNWARD 1 | |
279 | |
280 /* Offset within stack frame to start allocating local variables at. | |
281 If FRAME_GROWS_DOWNWARD, this is the offset to the END of the | |
282 first local allocated. Otherwise, it is the offset to the BEGINNING | |
283 of the first local allocated. */ | |
284 #define STARTING_FRAME_OFFSET 0 | |
285 | |
286 /* Given an rtx for the address of a frame, | |
287 return an rtx for the address of the word in the frame | |
288 that holds the dynamic chain--the previous frame's address. */ | |
289 #define DYNAMIC_CHAIN_ADDRESS(FRAME) plus_constant ((FRAME), 12) | |
290 | |
291 /* If we generate an insn to push BYTES bytes, | |
292 this says how many the stack pointer really advances by. | |
293 On the VAX, -(sp) pushes only the bytes of the operands. */ | |
294 #define PUSH_ROUNDING(BYTES) (BYTES) | |
295 | |
296 /* Offset of first parameter from the argument pointer register value. */ | |
297 #define FIRST_PARM_OFFSET(FNDECL) 4 | |
298 | |
299 /* Define how to find the value returned by a function. | |
300 VALTYPE is the data type of the value (as a tree). | |
301 If the precise function being called is known, FUNC is its FUNCTION_DECL; | |
302 otherwise, FUNC is 0. */ | |
303 | |
304 /* On the VAX the return value is in R0 regardless. */ | |
305 | |
306 #define FUNCTION_VALUE(VALTYPE, FUNC) \ | |
307 gen_rtx_REG (TYPE_MODE (VALTYPE), 0) | |
308 | |
309 /* Define how to find the value returned by a library function | |
310 assuming the value has mode MODE. */ | |
311 | |
312 /* On the VAX the return value is in R0 regardless. */ | |
313 | |
314 #define LIBCALL_VALUE(MODE) gen_rtx_REG (MODE, 0) | |
315 | |
316 /* Define this if PCC uses the nonreentrant convention for returning | |
317 structure and union values. */ | |
318 | |
319 #define PCC_STATIC_STRUCT_RETURN | |
320 | |
321 /* 1 if N is a possible register number for a function value. | |
322 On the VAX, R0 is the only register thus used. */ | |
323 | |
324 #define FUNCTION_VALUE_REGNO_P(N) ((N) == 0) | |
325 | |
326 /* 1 if N is a possible register number for function argument passing. | |
327 On the VAX, no registers are used in this way. */ | |
328 | |
329 #define FUNCTION_ARG_REGNO_P(N) 0 | |
330 | |
331 /* Define a data type for recording info about an argument list | |
332 during the scan of that argument list. This data type should | |
333 hold all necessary information about the function itself | |
334 and about the args processed so far, enough to enable macros | |
335 such as FUNCTION_ARG to determine where the next arg should go. | |
336 | |
337 On the VAX, this is a single integer, which is a number of bytes | |
338 of arguments scanned so far. */ | |
339 | |
340 #define CUMULATIVE_ARGS int | |
341 | |
342 /* Initialize a variable CUM of type CUMULATIVE_ARGS | |
343 for a call to a function whose data type is FNTYPE. | |
344 For a library call, FNTYPE is 0. | |
345 | |
346 On the VAX, the offset starts at 0. */ | |
347 | |
348 #define INIT_CUMULATIVE_ARGS(CUM, FNTYPE, LIBNAME, INDIRECT, N_NAMED_ARGS) \ | |
349 ((CUM) = 0) | |
350 | |
351 /* Output assembler code to FILE to increment profiler label # LABELNO | |
352 for profiling a function entry. */ | |
353 | |
354 #define VAX_FUNCTION_PROFILER_NAME "mcount" | |
355 #define FUNCTION_PROFILER(FILE, LABELNO) \ | |
356 do \ | |
357 { \ | |
358 char label[256]; \ | |
359 ASM_GENERATE_INTERNAL_LABEL (label, "LP", (LABELNO)); \ | |
360 fprintf (FILE, "\tmovab "); \ | |
361 assemble_name (FILE, label); \ | |
362 asm_fprintf (FILE, ",%Rr0\n\tjsb %s\n", \ | |
363 VAX_FUNCTION_PROFILER_NAME); \ | |
364 } \ | |
365 while (0) | |
366 | |
367 /* EXIT_IGNORE_STACK should be nonzero if, when returning from a function, | |
368 the stack pointer does not matter. The value is tested only in | |
369 functions that have frame pointers. | |
370 No definition is equivalent to always zero. */ | |
371 | |
372 #define EXIT_IGNORE_STACK 1 | |
373 | |
374 /* Store in the variable DEPTH the initial difference between the | |
375 frame pointer reg contents and the stack pointer reg contents, | |
376 as of the start of the function body. This depends on the layout | |
377 of the fixed parts of the stack frame and on how registers are saved. | |
378 | |
379 On the VAX, FRAME_POINTER_REQUIRED is always 1, so the definition of this | |
380 macro doesn't matter. But it must be defined. */ | |
381 | |
382 #define INITIAL_FRAME_POINTER_OFFSET(DEPTH) (DEPTH) = 0; | |
383 | |
384 /* Length in units of the trampoline for entering a nested function. */ | |
385 | |
386 #define TRAMPOLINE_SIZE 15 | |
387 | |
388 /* Byte offset of return address in a stack frame. The "saved PC" field | |
389 is in element [4] when treating the frame as an array of longwords. */ | |
390 | |
391 #define RETURN_ADDRESS_OFFSET (4 * UNITS_PER_WORD) /* 16 */ | |
392 | |
393 /* A C expression whose value is RTL representing the value of the return | |
394 address for the frame COUNT steps up from the current frame. | |
395 FRAMEADDR is already the frame pointer of the COUNT frame, so we | |
396 can ignore COUNT. */ | |
397 | |
398 #define RETURN_ADDR_RTX(COUNT, FRAME) \ | |
399 ((COUNT == 0) \ | |
400 ? gen_rtx_MEM (Pmode, plus_constant (FRAME, RETURN_ADDRESS_OFFSET)) \ | |
401 : (rtx) 0) | |
402 | |
403 | |
404 /* Addressing modes, and classification of registers for them. */ | |
405 | |
406 #define HAVE_POST_INCREMENT 1 | |
407 | |
408 #define HAVE_PRE_DECREMENT 1 | |
409 | |
410 /* Macros to check register numbers against specific register classes. */ | |
411 | |
412 /* These assume that REGNO is a hard or pseudo reg number. | |
413 They give nonzero only if REGNO is a hard reg of the suitable class | |
414 or a pseudo reg currently allocated to a suitable hard reg. | |
415 Since they use reg_renumber, they are safe only once reg_renumber | |
416 has been allocated, which happens in local-alloc.c. */ | |
417 | |
418 #define REGNO_OK_FOR_INDEX_P(regno) \ | |
419 ((regno) < FIRST_PSEUDO_REGISTER || reg_renumber[regno] >= 0) | |
420 #define REGNO_OK_FOR_BASE_P(regno) \ | |
421 ((regno) < FIRST_PSEUDO_REGISTER || reg_renumber[regno] >= 0) | |
422 | |
423 /* Maximum number of registers that can appear in a valid memory address. */ | |
424 | |
425 #define MAX_REGS_PER_ADDRESS 2 | |
426 | |
427 /* 1 if X is an rtx for a constant that is a valid address. */ | |
428 | |
429 #define CONSTANT_ADDRESS_P(X) legitimate_constant_address_p (X) | |
430 | |
431 /* Nonzero if the constant value X is a legitimate general operand. | |
432 It is given that X satisfies CONSTANT_P or is a CONST_DOUBLE. */ | |
433 | |
434 #define LEGITIMATE_CONSTANT_P(X) legitimate_constant_p (X) | |
435 | |
436 /* The macros REG_OK_FOR..._P assume that the arg is a REG rtx | |
437 and check its validity for a certain class. | |
438 We have two alternate definitions for each of them. | |
439 The usual definition accepts all pseudo regs; the other rejects | |
440 them unless they have been allocated suitable hard regs. | |
441 The symbol REG_OK_STRICT causes the latter definition to be used. | |
442 | |
443 Most source files want to accept pseudo regs in the hope that | |
444 they will get allocated to the class that the insn wants them to be in. | |
445 Source files for reload pass need to be strict. | |
446 After reload, it makes no difference, since pseudo regs have | |
447 been eliminated by then. */ | |
448 | |
449 #ifndef REG_OK_STRICT | |
450 | |
451 /* Nonzero if X is a hard reg that can be used as an index | |
452 or if it is a pseudo reg. */ | |
453 #define REG_OK_FOR_INDEX_P(X) 1 | |
454 | |
455 /* Nonzero if X is a hard reg that can be used as a base reg | |
456 or if it is a pseudo reg. */ | |
457 #define REG_OK_FOR_BASE_P(X) 1 | |
458 | |
459 #else | |
460 | |
461 /* Nonzero if X is a hard reg that can be used as an index. */ | |
462 #define REG_OK_FOR_INDEX_P(X) REGNO_OK_FOR_INDEX_P (REGNO (X)) | |
463 | |
464 /* Nonzero if X is a hard reg that can be used as a base reg. */ | |
465 #define REG_OK_FOR_BASE_P(X) REGNO_OK_FOR_BASE_P (REGNO (X)) | |
466 | |
467 #endif | |
468 | |
469 /* Go to LABEL if ADDR (a legitimate address expression) | |
470 has an effect that depends on the machine mode it is used for. */ | |
471 #define GO_IF_MODE_DEPENDENT_ADDRESS(ADDR, LABEL) \ | |
472 { if (vax_mode_dependent_address_p (ADDR)) goto LABEL; } | |
473 | |
474 /* Specify the machine mode that this machine uses | |
475 for the index in the tablejump instruction. */ | |
476 #define CASE_VECTOR_MODE HImode | |
477 | |
478 /* Define as C expression which evaluates to nonzero if the tablejump | |
479 instruction expects the table to contain offsets from the address of the | |
480 table. | |
481 Do not define this if the table should contain absolute addresses. */ | |
482 #define CASE_VECTOR_PC_RELATIVE 1 | |
483 | |
484 /* Indicate that jump tables go in the text section. This is | |
485 necessary when compiling PIC code. */ | |
486 #define JUMP_TABLES_IN_TEXT_SECTION 1 | |
487 | |
488 /* Define this as 1 if `char' should by default be signed; else as 0. */ | |
489 #define DEFAULT_SIGNED_CHAR 1 | |
490 | |
491 /* This flag, if defined, says the same insns that convert to a signed fixnum | |
492 also convert validly to an unsigned one. */ | |
493 #define FIXUNS_TRUNC_LIKE_FIX_TRUNC | |
494 | |
495 /* Max number of bytes we can move from memory to memory | |
496 in one reasonably fast instruction. */ | |
497 #define MOVE_MAX 8 | |
498 | |
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499 /* If a memory-to-memory move would take MOVE_RATIO or more simple |
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500 move-instruction pairs, we will do a movmem or libcall instead. */ |
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501 #define MOVE_RATIO(speed) ((speed) ? 6 : 3) |
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502 #define CLEAR_RATIO(speed) ((speed) ? 6 : 2) |
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503 |
0 | 504 /* Nonzero if access to memory by bytes is slow and undesirable. */ |
505 #define SLOW_BYTE_ACCESS 0 | |
506 | |
507 /* Define if shifts truncate the shift count | |
508 which implies one can omit a sign-extension or zero-extension | |
509 of a shift count. */ | |
510 /* #define SHIFT_COUNT_TRUNCATED */ | |
511 | |
512 /* Value is 1 if truncating an integer of INPREC bits to OUTPREC bits | |
513 is done just by pretending it is already truncated. */ | |
514 #define TRULY_NOOP_TRUNCATION(OUTPREC, INPREC) 1 | |
515 | |
516 /* Specify the machine mode that pointers have. | |
517 After generation of rtl, the compiler makes no further distinction | |
518 between pointers and any other objects of this machine mode. */ | |
519 #define Pmode SImode | |
520 | |
521 /* A function address in a call instruction | |
522 is a byte address (for indexing purposes) | |
523 so give the MEM rtx a byte's mode. */ | |
524 #define FUNCTION_MODE QImode | |
525 | |
526 /* Specify the cost of a branch insn; roughly the number of extra insns that | |
527 should be added to avoid a branch. | |
528 | |
529 Branches are extremely cheap on the VAX while the shift insns often | |
530 used to replace branches can be expensive. */ | |
531 | |
532 #define BRANCH_COST(speed_p, predictable_p) 0 | |
533 | |
534 /* Tell final.c how to eliminate redundant test instructions. */ | |
535 | |
536 /* Here we define machine-dependent flags and fields in cc_status | |
537 (see `conditions.h'). No extra ones are needed for the VAX. */ | |
538 | |
539 /* Store in cc_status the expressions | |
540 that the condition codes will describe | |
541 after execution of an instruction whose pattern is EXP. | |
542 Do not alter them if the instruction would not alter the cc's. */ | |
543 | |
544 #define NOTICE_UPDATE_CC(EXP, INSN) \ | |
545 vax_notice_update_cc ((EXP), (INSN)) | |
546 | |
547 #define OUTPUT_JUMP(NORMAL, FLOAT, NO_OV) \ | |
548 { if (cc_status.flags & CC_NO_OVERFLOW) \ | |
549 return NO_OV; \ | |
550 return NORMAL; \ | |
551 } | |
552 | |
553 /* Control the assembler format that we output. */ | |
554 | |
555 /* A C string constant describing how to begin a comment in the target | |
556 assembler language. The compiler assumes that the comment will end at | |
557 the end of the line. */ | |
558 | |
559 #define ASM_COMMENT_START "#" | |
560 | |
561 /* Output to assembler file text saying following lines | |
562 may contain character constants, extra white space, comments, etc. */ | |
563 | |
564 #define ASM_APP_ON "#APP\n" | |
565 | |
566 /* Output to assembler file text saying following lines | |
567 no longer contain unusual constructs. */ | |
568 | |
569 #define ASM_APP_OFF "#NO_APP\n" | |
570 | |
571 /* Output before read-only data. */ | |
572 | |
573 #define TEXT_SECTION_ASM_OP "\t.text" | |
574 | |
575 /* Output before writable data. */ | |
576 | |
577 #define DATA_SECTION_ASM_OP "\t.data" | |
578 | |
579 /* How to refer to registers in assembler output. | |
580 This sequence is indexed by compiler's hard-register-number (see above). | |
581 The register names will be prefixed by REGISTER_PREFIX, if any. */ | |
582 | |
583 #define REGISTER_PREFIX "" | |
584 #define REGISTER_NAMES \ | |
585 { "r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7", \ | |
586 "r8", "r9", "r10", "r11", "ap", "fp", "sp", "pc", } | |
587 | |
588 /* This is BSD, so it wants DBX format. */ | |
589 | |
590 #define DBX_DEBUGGING_INFO 1 | |
591 | |
592 /* Do not break .stabs pseudos into continuations. */ | |
593 | |
594 #define DBX_CONTIN_LENGTH 0 | |
595 | |
596 /* This is the char to use for continuation (in case we need to turn | |
597 continuation back on). */ | |
598 | |
599 #define DBX_CONTIN_CHAR '?' | |
600 | |
601 /* Don't use the `xsfoo;' construct in DBX output; this system | |
602 doesn't support it. */ | |
603 | |
604 #define DBX_NO_XREFS | |
605 | |
606 /* Output the .stabs for a C `static' variable in the data section. */ | |
607 #define DBX_STATIC_STAB_DATA_SECTION | |
608 | |
609 /* VAX specific: which type character is used for type double? */ | |
610 | |
611 #define ASM_DOUBLE_CHAR (TARGET_G_FLOAT ? 'g' : 'd') | |
612 | |
613 /* This is how to output a command to make the user-level label named NAME | |
614 defined for reference from other files. */ | |
615 | |
616 /* Globalizing directive for a label. */ | |
617 #define GLOBAL_ASM_OP ".globl " | |
618 | |
619 /* The prefix to add to user-visible assembler symbols. */ | |
620 | |
621 #define USER_LABEL_PREFIX "_" | |
622 | |
623 /* This is how to store into the string LABEL | |
624 the symbol_ref name of an internal numbered label where | |
625 PREFIX is the class of label and NUM is the number within the class. | |
626 This is suitable for output with `assemble_name'. */ | |
627 | |
628 #define ASM_GENERATE_INTERNAL_LABEL(LABEL,PREFIX,NUM) \ | |
629 sprintf (LABEL, "*%s%ld", PREFIX, (long)(NUM)) | |
630 | |
631 /* This is how to output an insn to push a register on the stack. | |
632 It need not be very fast code. */ | |
633 | |
634 #define ASM_OUTPUT_REG_PUSH(FILE,REGNO) \ | |
635 fprintf (FILE, "\tpushl %s\n", reg_names[REGNO]) | |
636 | |
637 /* This is how to output an insn to pop a register from the stack. | |
638 It need not be very fast code. */ | |
639 | |
640 #define ASM_OUTPUT_REG_POP(FILE,REGNO) \ | |
641 fprintf (FILE, "\tmovl (%s)+,%s\n", reg_names[STACK_POINTER_REGNUM], \ | |
642 reg_names[REGNO]) | |
643 | |
644 /* This is how to output an element of a case-vector that is absolute. | |
645 (The VAX does not use such vectors, | |
646 but we must define this macro anyway.) */ | |
647 | |
648 #define ASM_OUTPUT_ADDR_VEC_ELT(FILE, VALUE) \ | |
649 do \ | |
650 { \ | |
651 char label[256]; \ | |
652 ASM_GENERATE_INTERNAL_LABEL (label, "L", (VALUE));\ | |
653 fprintf (FILE, "\t.long "); \ | |
654 assemble_name (FILE, label); \ | |
655 fprintf (FILE, "\n"); \ | |
656 } \ | |
657 while (0) | |
658 | |
659 /* This is how to output an element of a case-vector that is relative. */ | |
660 | |
661 #define ASM_OUTPUT_ADDR_DIFF_ELT(FILE, BODY, VALUE, REL) \ | |
662 do \ | |
663 { \ | |
664 char label[256]; \ | |
665 ASM_GENERATE_INTERNAL_LABEL (label, "L", (VALUE)); \ | |
666 fprintf (FILE, "\t.word "); \ | |
667 assemble_name (FILE, label); \ | |
668 ASM_GENERATE_INTERNAL_LABEL (label, "L", (REL)); \ | |
669 fprintf (FILE, "-"); \ | |
670 assemble_name (FILE, label); \ | |
671 fprintf (FILE, "\n"); \ | |
672 } \ | |
673 while (0) | |
674 | |
675 /* This is how to output an assembler line | |
676 that says to advance the location counter | |
677 to a multiple of 2**LOG bytes. */ | |
678 | |
679 #define ASM_OUTPUT_ALIGN(FILE,LOG) \ | |
680 fprintf (FILE, "\t.align %d\n", (LOG)) | |
681 | |
682 /* This is how to output an assembler line | |
683 that says to advance the location counter by SIZE bytes. */ | |
684 | |
685 #define ASM_OUTPUT_SKIP(FILE,SIZE) \ | |
686 fprintf (FILE, "\t.space %u\n", (int)(SIZE)) | |
687 | |
688 /* This says how to output an assembler line | |
689 to define a global common symbol. */ | |
690 | |
691 #define ASM_OUTPUT_COMMON(FILE, NAME, SIZE, ROUNDED) \ | |
692 ( fputs (".comm ", (FILE)), \ | |
693 assemble_name ((FILE), (NAME)), \ | |
694 fprintf ((FILE), ",%u\n", (int)(ROUNDED))) | |
695 | |
696 /* This says how to output an assembler line | |
697 to define a local common symbol. */ | |
698 | |
699 #define ASM_OUTPUT_LOCAL(FILE, NAME, SIZE, ROUNDED) \ | |
700 ( fputs (".lcomm ", (FILE)), \ | |
701 assemble_name ((FILE), (NAME)), \ | |
702 fprintf ((FILE), ",%u\n", (int)(ROUNDED))) | |
703 | |
704 /* Print an instruction operand X on file FILE. | |
705 CODE is the code from the %-spec that requested printing this operand; | |
706 if `%z3' was used to print operand 3, then CODE is 'z'. | |
707 | |
708 VAX operand formatting codes: | |
709 | |
710 letter print | |
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711 c direct branch condition |
0 | 712 C reverse branch condition |
713 D 64-bit immediate operand | |
714 B the low 8 bits of the complement of a constant operand | |
715 H the low 16 bits of the complement of a constant operand | |
716 M a mask for the N highest bits of a word | |
717 N the complement of a constant integer operand | |
718 P constant operand plus 1 | |
719 R 32 - constant operand | |
720 b the low 8 bits of a negated constant operand | |
721 h the low 16 bits of a negated constant operand | |
722 # 'd' or 'g' depending on whether dfloat or gfloat is used | |
723 | register prefix */ | |
724 | |
725 /* The purpose of D is to get around a quirk or bug in VAX assembler | |
726 whereby -1 in a 64-bit immediate operand means 0x00000000ffffffff, | |
727 which is not a 64-bit minus one. As a workaround, we output negative | |
728 values in hex. */ | |
729 #if HOST_BITS_PER_WIDE_INT == 64 | |
730 # define NEG_HWI_PRINT_HEX16 HOST_WIDE_INT_PRINT_HEX | |
731 #else | |
732 # define NEG_HWI_PRINT_HEX16 "0xffffffff%08lx" | |
733 #endif | |
734 | |
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735 #define PRINT_OPERAND_PUNCT_VALID_P(CODE) \ |
0 | 736 ((CODE) == '#' || (CODE) == '|') |
737 | |
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738 #define PRINT_OPERAND(FILE, X, CODE) \ |
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739 print_operand (FILE, X, CODE) |
0 | 740 |
741 /* Print a memory operand whose address is X, on file FILE. | |
742 This uses a function in output-vax.c. */ | |
743 | |
744 #define PRINT_OPERAND_ADDRESS(FILE, ADDR) \ | |
745 print_operand_address (FILE, ADDR) | |
746 | |
747 /* This is a blatent lie. However, it's good enough, since we don't | |
748 actually have any code whatsoever for which this isn't overridden | |
749 by the proper FDE definition. */ | |
750 #define INCOMING_RETURN_ADDR_RTX gen_rtx_REG (Pmode, PC_REGNUM) | |
751 |