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annotate gcc/config/vax/vax.h @ 158:494b0b89df80 default tip
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author | Shinji KONO <kono@ie.u-ryukyu.ac.jp> |
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date | Mon, 25 May 2020 18:13:55 +0900 |
parents | 1830386684a0 |
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rev | line source |
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0 | 1 /* Definitions of target machine for GNU compiler. VAX version. |
145 | 2 Copyright (C) 1987-2020 Free Software Foundation, Inc. |
0 | 3 |
4 This file is part of GCC. | |
5 | |
6 GCC is free software; you can redistribute it and/or modify | |
7 it under the terms of the GNU General Public License as published by | |
8 the Free Software Foundation; either version 3, or (at your option) | |
9 any later version. | |
10 | |
11 GCC is distributed in the hope that it will be useful, | |
12 but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 GNU General Public License for more details. | |
15 | |
16 You should have received a copy of the GNU General Public License | |
17 along with GCC; see the file COPYING3. If not see | |
18 <http://www.gnu.org/licenses/>. */ | |
19 | |
20 | |
21 /* Target CPU builtins. */ | |
22 #define TARGET_CPU_CPP_BUILTINS() \ | |
23 do \ | |
24 { \ | |
25 builtin_define ("__vax__"); \ | |
26 builtin_assert ("cpu=vax"); \ | |
27 builtin_assert ("machine=vax"); \ | |
28 if (TARGET_G_FLOAT) \ | |
29 { \ | |
30 builtin_define ("__GFLOAT"); \ | |
31 builtin_define ("__GFLOAT__"); \ | |
32 } \ | |
33 } \ | |
34 while (0) | |
35 | |
36 /* Use -J option for long branch support with Unix assembler. */ | |
37 | |
38 #define ASM_SPEC "-J" | |
39 | |
40 /* Choose proper libraries depending on float format. | |
41 Note that there are no profiling libraries for g-format. | |
42 Also use -lg for the sake of dbx. */ | |
43 | |
44 #define LIB_SPEC "%{g:-lg}\ | |
45 %{mg:%{lm:-lmg} -lcg \ | |
46 %{p:%eprofiling not supported with -mg\n}\ | |
47 %{pg:%eprofiling not supported with -mg\n}}\ | |
48 %{!mg:%{!p:%{!pg:-lc}}%{p:-lc_p}%{pg:-lc_p}}" | |
49 | |
50 /* Run-time compilation parameters selecting different hardware subsets. */ | |
51 | |
52 /* Nonzero if ELF. Redefined by vax/elf.h. */ | |
53 #define TARGET_ELF 0 | |
54 | |
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55 /* Use BSD names for udiv and umod libgcc calls. */ |
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56 #define TARGET_BSD_DIVMOD 1 |
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57 |
0 | 58 /* Default target_flags if no switches specified. */ |
59 | |
60 #ifndef TARGET_DEFAULT | |
61 #define TARGET_DEFAULT (MASK_UNIX_ASM) | |
62 #endif | |
63 | |
64 | |
65 /* Target machine storage layout */ | |
66 | |
67 /* Define this if most significant bit is lowest numbered | |
68 in instructions that operate on numbered bit-fields. | |
69 This is not true on the VAX. */ | |
70 #define BITS_BIG_ENDIAN 0 | |
71 | |
72 /* Define this if most significant byte of a word is the lowest numbered. */ | |
73 /* That is not true on the VAX. */ | |
74 #define BYTES_BIG_ENDIAN 0 | |
75 | |
76 /* Define this if most significant word of a multiword number is the lowest | |
77 numbered. */ | |
78 /* This is not true on the VAX. */ | |
79 #define WORDS_BIG_ENDIAN 0 | |
80 | |
81 /* Width of a word, in units (bytes). */ | |
82 #define UNITS_PER_WORD 4 | |
83 | |
84 /* Allocation boundary (in *bits*) for storing arguments in argument list. */ | |
85 #define PARM_BOUNDARY 32 | |
86 | |
87 /* Allocation boundary (in *bits*) for the code of a function. */ | |
88 #define FUNCTION_BOUNDARY 16 | |
89 | |
90 /* Alignment of field after `int : 0' in a structure. */ | |
91 #define EMPTY_FIELD_BOUNDARY (TARGET_VAXC_ALIGNMENT ? 8 : 32) | |
92 | |
93 /* Every structure's size must be a multiple of this. */ | |
94 #define STRUCTURE_SIZE_BOUNDARY 8 | |
95 | |
96 /* A bit-field declared as `int' forces `int' alignment for the struct. */ | |
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97 #define PCC_BITFIELD_TYPE_MATTERS (! TARGET_VAXC_ALIGNMENT) |
0 | 98 |
99 /* No data type wants to be aligned rounder than this. */ | |
100 #define BIGGEST_ALIGNMENT 32 | |
101 | |
102 /* No structure field wants to be aligned rounder than this. */ | |
103 #define BIGGEST_FIELD_ALIGNMENT (TARGET_VAXC_ALIGNMENT ? 8 : 32) | |
104 | |
105 /* Set this nonzero if move instructions will actually fail to work | |
106 when given unaligned data. */ | |
107 #define STRICT_ALIGNMENT 0 | |
108 | |
109 /* Let's keep the stack somewhat aligned. */ | |
110 #define STACK_BOUNDARY 32 | |
111 | |
112 /* The table of an ADDR_DIFF_VEC must be contiguous with the case | |
113 opcode, it is part of the case instruction. */ | |
114 #define ADDR_VEC_ALIGN(ADDR_VEC) 0 | |
115 | |
116 /* Standard register usage. */ | |
117 | |
118 /* Number of actual hardware registers. | |
119 The hardware registers are assigned numbers for the compiler | |
120 from 0 to just below FIRST_PSEUDO_REGISTER. | |
121 All registers that the compiler knows about must be given numbers, | |
122 even those that are not normally considered general registers. */ | |
123 #define FIRST_PSEUDO_REGISTER 16 | |
124 | |
125 /* 1 for registers that have pervasive standard uses | |
126 and are not available for the register allocator. | |
127 On the VAX, these are the AP, FP, SP and PC. */ | |
128 #define FIXED_REGISTERS {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1} | |
129 | |
130 /* 1 for registers not available across function calls. | |
131 These must include the FIXED_REGISTERS and also any | |
132 registers that can be used without being saved. | |
133 The latter must include the registers where values are returned | |
134 and the register where structure-value addresses are passed. | |
135 Aside from that, you can include as many other registers as you like. */ | |
136 #define CALL_USED_REGISTERS {1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1} | |
137 | |
138 /* Specify the registers used for certain standard purposes. | |
139 The values of these macros are register numbers. */ | |
140 | |
141 /* VAX pc is overloaded on a register. */ | |
142 #define PC_REGNUM VAX_PC_REGNUM | |
143 | |
144 /* Register to use for pushing function arguments. */ | |
145 #define STACK_POINTER_REGNUM VAX_SP_REGNUM | |
146 | |
147 /* Base register for access to local variables of the function. */ | |
148 #define FRAME_POINTER_REGNUM VAX_FP_REGNUM | |
149 | |
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150 /* Offset from the frame pointer register value to the top of stack. */ |
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151 #define FRAME_POINTER_CFA_OFFSET(FNDECL) 0 |
0 | 152 |
153 /* Base register for access to arguments of the function. */ | |
154 #define ARG_POINTER_REGNUM VAX_AP_REGNUM | |
155 | |
156 /* Register in which static-chain is passed to a function. */ | |
157 #define STATIC_CHAIN_REGNUM 0 | |
158 | |
159 /* Register in which address to store a structure value | |
160 is passed to a function. */ | |
161 #define VAX_STRUCT_VALUE_REGNUM 1 | |
162 | |
163 /* Define the classes of registers for register constraints in the | |
164 machine description. Also define ranges of constants. | |
165 | |
166 One of the classes must always be named ALL_REGS and include all hard regs. | |
167 If there is more than one class, another class must be named NO_REGS | |
168 and contain no registers. | |
169 | |
170 The name GENERAL_REGS must be the name of a class (or an alias for | |
171 another name such as ALL_REGS). This is the class of registers | |
172 that is allowed by "g" or "r" in a register constraint. | |
173 Also, registers outside this class are allocated only when | |
174 instructions express preferences for them. | |
175 | |
176 The classes must be numbered in nondecreasing order; that is, | |
177 a larger-numbered class must never be contained completely | |
178 in a smaller-numbered class. | |
179 | |
180 For any two classes, it is very desirable that there be another | |
181 class that represents their union. */ | |
182 | |
183 /* The VAX has only one kind of registers, so NO_REGS and ALL_REGS | |
184 are the only classes. */ | |
185 | |
186 enum reg_class { NO_REGS, ALL_REGS, LIM_REG_CLASSES }; | |
187 | |
188 #define N_REG_CLASSES (int) LIM_REG_CLASSES | |
189 | |
190 /* Since GENERAL_REGS is the same class as ALL_REGS, | |
191 don't give it a different class number; just make it an alias. */ | |
192 | |
193 #define GENERAL_REGS ALL_REGS | |
194 | |
195 /* Give names of register classes as strings for dump file. */ | |
196 | |
197 #define REG_CLASS_NAMES \ | |
198 { "NO_REGS", "ALL_REGS" } | |
199 | |
200 /* Define which registers fit in which classes. | |
201 This is an initializer for a vector of HARD_REG_SET | |
202 of length N_REG_CLASSES. */ | |
203 | |
204 #define REG_CLASS_CONTENTS {{0}, {0xffff}} | |
205 | |
206 /* The same information, inverted: | |
207 Return the class number of the smallest class containing | |
208 reg number REGNO. This could be a conditional expression | |
209 or could index an array. */ | |
210 | |
111 | 211 #define REGNO_REG_CLASS(REGNO) ((void)(REGNO), ALL_REGS) |
0 | 212 |
213 /* The class value for index registers, and the one for base regs. */ | |
214 | |
215 #define INDEX_REG_CLASS ALL_REGS | |
216 #define BASE_REG_CLASS ALL_REGS | |
217 | |
218 | |
219 /* Stack layout; function entry, exit and calling. */ | |
220 | |
221 /* Define this if pushing a word on the stack | |
222 makes the stack pointer a smaller address. */ | |
111 | 223 #define STACK_GROWS_DOWNWARD 1 |
0 | 224 |
225 /* Define this to nonzero if the nominal address of the stack frame | |
226 is at the high-address end of the local variables; | |
227 that is, each additional local variable allocated | |
228 goes at a more negative offset in the frame. */ | |
229 #define FRAME_GROWS_DOWNWARD 1 | |
230 | |
231 /* Given an rtx for the address of a frame, | |
232 return an rtx for the address of the word in the frame | |
233 that holds the dynamic chain--the previous frame's address. */ | |
111 | 234 #define DYNAMIC_CHAIN_ADDRESS(FRAME) plus_constant (Pmode, (FRAME), 12) |
0 | 235 |
236 /* If we generate an insn to push BYTES bytes, | |
237 this says how many the stack pointer really advances by. | |
238 On the VAX, -(sp) pushes only the bytes of the operands. */ | |
239 #define PUSH_ROUNDING(BYTES) (BYTES) | |
240 | |
241 /* Offset of first parameter from the argument pointer register value. */ | |
242 #define FIRST_PARM_OFFSET(FNDECL) 4 | |
243 | |
244 /* Define how to find the value returned by a function. | |
245 VALTYPE is the data type of the value (as a tree). | |
246 If the precise function being called is known, FUNC is its FUNCTION_DECL; | |
247 otherwise, FUNC is 0. */ | |
248 | |
249 /* On the VAX the return value is in R0 regardless. */ | |
250 | |
251 #define FUNCTION_VALUE(VALTYPE, FUNC) \ | |
252 gen_rtx_REG (TYPE_MODE (VALTYPE), 0) | |
253 | |
254 /* Define how to find the value returned by a library function | |
255 assuming the value has mode MODE. */ | |
256 | |
257 /* On the VAX the return value is in R0 regardless. */ | |
258 | |
259 #define LIBCALL_VALUE(MODE) gen_rtx_REG (MODE, 0) | |
260 | |
261 /* Define this if PCC uses the nonreentrant convention for returning | |
262 structure and union values. */ | |
263 | |
264 #define PCC_STATIC_STRUCT_RETURN | |
265 | |
266 /* 1 if N is a possible register number for a function value. | |
267 On the VAX, R0 is the only register thus used. */ | |
268 | |
269 #define FUNCTION_VALUE_REGNO_P(N) ((N) == 0) | |
270 | |
271 /* 1 if N is a possible register number for function argument passing. | |
272 On the VAX, no registers are used in this way. */ | |
273 | |
111 | 274 #define FUNCTION_ARG_REGNO_P(N) ((void) (N), 0) |
0 | 275 |
276 /* Define a data type for recording info about an argument list | |
277 during the scan of that argument list. This data type should | |
278 hold all necessary information about the function itself | |
279 and about the args processed so far, enough to enable macros | |
280 such as FUNCTION_ARG to determine where the next arg should go. | |
281 | |
282 On the VAX, this is a single integer, which is a number of bytes | |
283 of arguments scanned so far. */ | |
284 | |
285 #define CUMULATIVE_ARGS int | |
286 | |
287 /* Initialize a variable CUM of type CUMULATIVE_ARGS | |
288 for a call to a function whose data type is FNTYPE. | |
289 For a library call, FNTYPE is 0. | |
290 | |
291 On the VAX, the offset starts at 0. */ | |
292 | |
293 #define INIT_CUMULATIVE_ARGS(CUM, FNTYPE, LIBNAME, INDIRECT, N_NAMED_ARGS) \ | |
294 ((CUM) = 0) | |
295 | |
296 /* Output assembler code to FILE to increment profiler label # LABELNO | |
297 for profiling a function entry. */ | |
298 | |
299 #define VAX_FUNCTION_PROFILER_NAME "mcount" | |
300 #define FUNCTION_PROFILER(FILE, LABELNO) \ | |
301 do \ | |
302 { \ | |
303 char label[256]; \ | |
304 ASM_GENERATE_INTERNAL_LABEL (label, "LP", (LABELNO)); \ | |
305 fprintf (FILE, "\tmovab "); \ | |
306 assemble_name (FILE, label); \ | |
307 asm_fprintf (FILE, ",%Rr0\n\tjsb %s\n", \ | |
308 VAX_FUNCTION_PROFILER_NAME); \ | |
309 } \ | |
310 while (0) | |
311 | |
111 | 312 /* This macro specifies a table of register pairs used to eliminate |
313 unneeded registers that point into the stack frame. */ | |
314 #define ELIMINABLE_REGS {{FRAME_POINTER_REGNUM, STACK_POINTER_REGNUM}} | |
315 | |
316 /* On the VAX, FRAME_POINTER_REQUIRED is always 1, so the definition of this | |
317 macro doesn't matter for register eliminations, but it should still | |
318 give realistic data for rtx_addr_can_trap_p. */ | |
319 #define INITIAL_ELIMINATION_OFFSET(FROM, TO, OFFSET) \ | |
320 ((OFFSET) = get_frame_size ()) | |
321 | |
0 | 322 /* EXIT_IGNORE_STACK should be nonzero if, when returning from a function, |
323 the stack pointer does not matter. The value is tested only in | |
324 functions that have frame pointers. | |
325 No definition is equivalent to always zero. */ | |
326 | |
327 #define EXIT_IGNORE_STACK 1 | |
328 | |
329 /* Length in units of the trampoline for entering a nested function. */ | |
330 | |
331 #define TRAMPOLINE_SIZE 15 | |
332 | |
333 /* Byte offset of return address in a stack frame. The "saved PC" field | |
334 is in element [4] when treating the frame as an array of longwords. */ | |
335 | |
336 #define RETURN_ADDRESS_OFFSET (4 * UNITS_PER_WORD) /* 16 */ | |
337 | |
338 /* A C expression whose value is RTL representing the value of the return | |
339 address for the frame COUNT steps up from the current frame. | |
340 FRAMEADDR is already the frame pointer of the COUNT frame, so we | |
341 can ignore COUNT. */ | |
342 | |
343 #define RETURN_ADDR_RTX(COUNT, FRAME) \ | |
344 ((COUNT == 0) \ | |
111 | 345 ? gen_rtx_MEM (Pmode, plus_constant (Pmode, FRAME, \ |
346 RETURN_ADDRESS_OFFSET)) \ | |
0 | 347 : (rtx) 0) |
348 | |
349 | |
350 /* Addressing modes, and classification of registers for them. */ | |
351 | |
352 #define HAVE_POST_INCREMENT 1 | |
353 | |
354 #define HAVE_PRE_DECREMENT 1 | |
355 | |
356 /* Macros to check register numbers against specific register classes. */ | |
357 | |
358 /* These assume that REGNO is a hard or pseudo reg number. | |
359 They give nonzero only if REGNO is a hard reg of the suitable class | |
360 or a pseudo reg currently allocated to a suitable hard reg. | |
361 Since they use reg_renumber, they are safe only once reg_renumber | |
111 | 362 has been allocated, which happens in reginfo.c during register |
363 allocation. */ | |
0 | 364 |
365 #define REGNO_OK_FOR_INDEX_P(regno) \ | |
366 ((regno) < FIRST_PSEUDO_REGISTER || reg_renumber[regno] >= 0) | |
367 #define REGNO_OK_FOR_BASE_P(regno) \ | |
368 ((regno) < FIRST_PSEUDO_REGISTER || reg_renumber[regno] >= 0) | |
369 | |
370 /* Maximum number of registers that can appear in a valid memory address. */ | |
371 | |
372 #define MAX_REGS_PER_ADDRESS 2 | |
373 | |
374 /* 1 if X is an rtx for a constant that is a valid address. */ | |
375 | |
376 #define CONSTANT_ADDRESS_P(X) legitimate_constant_address_p (X) | |
377 | |
378 /* The macros REG_OK_FOR..._P assume that the arg is a REG rtx | |
379 and check its validity for a certain class. | |
380 We have two alternate definitions for each of them. | |
381 The usual definition accepts all pseudo regs; the other rejects | |
382 them unless they have been allocated suitable hard regs. | |
383 The symbol REG_OK_STRICT causes the latter definition to be used. | |
384 | |
385 Most source files want to accept pseudo regs in the hope that | |
386 they will get allocated to the class that the insn wants them to be in. | |
387 Source files for reload pass need to be strict. | |
388 After reload, it makes no difference, since pseudo regs have | |
389 been eliminated by then. */ | |
390 | |
391 #ifndef REG_OK_STRICT | |
392 | |
393 /* Nonzero if X is a hard reg that can be used as an index | |
394 or if it is a pseudo reg. */ | |
395 #define REG_OK_FOR_INDEX_P(X) 1 | |
396 | |
397 /* Nonzero if X is a hard reg that can be used as a base reg | |
398 or if it is a pseudo reg. */ | |
399 #define REG_OK_FOR_BASE_P(X) 1 | |
400 | |
401 #else | |
402 | |
403 /* Nonzero if X is a hard reg that can be used as an index. */ | |
404 #define REG_OK_FOR_INDEX_P(X) REGNO_OK_FOR_INDEX_P (REGNO (X)) | |
405 | |
406 /* Nonzero if X is a hard reg that can be used as a base reg. */ | |
407 #define REG_OK_FOR_BASE_P(X) REGNO_OK_FOR_BASE_P (REGNO (X)) | |
408 | |
409 #endif | |
410 | |
411 /* Specify the machine mode that this machine uses | |
412 for the index in the tablejump instruction. */ | |
413 #define CASE_VECTOR_MODE HImode | |
414 | |
415 /* Define as C expression which evaluates to nonzero if the tablejump | |
416 instruction expects the table to contain offsets from the address of the | |
417 table. | |
418 Do not define this if the table should contain absolute addresses. */ | |
419 #define CASE_VECTOR_PC_RELATIVE 1 | |
420 | |
421 /* Indicate that jump tables go in the text section. This is | |
422 necessary when compiling PIC code. */ | |
423 #define JUMP_TABLES_IN_TEXT_SECTION 1 | |
424 | |
425 /* Define this as 1 if `char' should by default be signed; else as 0. */ | |
426 #define DEFAULT_SIGNED_CHAR 1 | |
427 | |
428 /* Max number of bytes we can move from memory to memory | |
429 in one reasonably fast instruction. */ | |
430 #define MOVE_MAX 8 | |
431 | |
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432 /* If a memory-to-memory move would take MOVE_RATIO or more simple |
145 | 433 move-instruction pairs, we will do a cpymem or libcall instead. */ |
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434 #define MOVE_RATIO(speed) ((speed) ? 6 : 3) |
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435 #define CLEAR_RATIO(speed) ((speed) ? 6 : 2) |
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436 |
0 | 437 /* Nonzero if access to memory by bytes is slow and undesirable. */ |
438 #define SLOW_BYTE_ACCESS 0 | |
439 | |
440 /* Define if shifts truncate the shift count | |
441 which implies one can omit a sign-extension or zero-extension | |
442 of a shift count. */ | |
443 /* #define SHIFT_COUNT_TRUNCATED */ | |
444 | |
445 /* Specify the machine mode that pointers have. | |
446 After generation of rtl, the compiler makes no further distinction | |
447 between pointers and any other objects of this machine mode. */ | |
448 #define Pmode SImode | |
449 | |
450 /* A function address in a call instruction | |
451 is a byte address (for indexing purposes) | |
452 so give the MEM rtx a byte's mode. */ | |
453 #define FUNCTION_MODE QImode | |
454 | |
455 /* Specify the cost of a branch insn; roughly the number of extra insns that | |
456 should be added to avoid a branch. | |
457 | |
458 Branches are extremely cheap on the VAX while the shift insns often | |
459 used to replace branches can be expensive. */ | |
460 | |
461 #define BRANCH_COST(speed_p, predictable_p) 0 | |
462 | |
463 /* Tell final.c how to eliminate redundant test instructions. */ | |
464 | |
465 /* Here we define machine-dependent flags and fields in cc_status | |
466 (see `conditions.h'). No extra ones are needed for the VAX. */ | |
467 | |
468 /* Store in cc_status the expressions | |
469 that the condition codes will describe | |
470 after execution of an instruction whose pattern is EXP. | |
471 Do not alter them if the instruction would not alter the cc's. */ | |
472 | |
473 #define NOTICE_UPDATE_CC(EXP, INSN) \ | |
474 vax_notice_update_cc ((EXP), (INSN)) | |
475 | |
476 #define OUTPUT_JUMP(NORMAL, FLOAT, NO_OV) \ | |
477 { if (cc_status.flags & CC_NO_OVERFLOW) \ | |
478 return NO_OV; \ | |
479 return NORMAL; \ | |
480 } | |
481 | |
482 /* Control the assembler format that we output. */ | |
483 | |
484 /* A C string constant describing how to begin a comment in the target | |
485 assembler language. The compiler assumes that the comment will end at | |
486 the end of the line. */ | |
487 | |
488 #define ASM_COMMENT_START "#" | |
489 | |
490 /* Output to assembler file text saying following lines | |
491 may contain character constants, extra white space, comments, etc. */ | |
492 | |
493 #define ASM_APP_ON "#APP\n" | |
494 | |
495 /* Output to assembler file text saying following lines | |
496 no longer contain unusual constructs. */ | |
497 | |
498 #define ASM_APP_OFF "#NO_APP\n" | |
499 | |
500 /* Output before read-only data. */ | |
501 | |
502 #define TEXT_SECTION_ASM_OP "\t.text" | |
503 | |
504 /* Output before writable data. */ | |
505 | |
506 #define DATA_SECTION_ASM_OP "\t.data" | |
507 | |
508 /* How to refer to registers in assembler output. | |
509 This sequence is indexed by compiler's hard-register-number (see above). | |
510 The register names will be prefixed by REGISTER_PREFIX, if any. */ | |
511 | |
512 #define REGISTER_PREFIX "" | |
513 #define REGISTER_NAMES \ | |
514 { "r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7", \ | |
515 "r8", "r9", "r10", "r11", "ap", "fp", "sp", "pc", } | |
516 | |
517 /* This is BSD, so it wants DBX format. */ | |
518 | |
519 #define DBX_DEBUGGING_INFO 1 | |
520 | |
521 /* Do not break .stabs pseudos into continuations. */ | |
522 | |
523 #define DBX_CONTIN_LENGTH 0 | |
524 | |
525 /* This is the char to use for continuation (in case we need to turn | |
526 continuation back on). */ | |
527 | |
528 #define DBX_CONTIN_CHAR '?' | |
529 | |
530 /* Don't use the `xsfoo;' construct in DBX output; this system | |
531 doesn't support it. */ | |
532 | |
533 #define DBX_NO_XREFS | |
534 | |
535 /* Output the .stabs for a C `static' variable in the data section. */ | |
536 #define DBX_STATIC_STAB_DATA_SECTION | |
537 | |
538 /* VAX specific: which type character is used for type double? */ | |
539 | |
540 #define ASM_DOUBLE_CHAR (TARGET_G_FLOAT ? 'g' : 'd') | |
541 | |
542 /* This is how to output a command to make the user-level label named NAME | |
543 defined for reference from other files. */ | |
544 | |
545 /* Globalizing directive for a label. */ | |
546 #define GLOBAL_ASM_OP ".globl " | |
547 | |
548 /* The prefix to add to user-visible assembler symbols. */ | |
549 | |
550 #define USER_LABEL_PREFIX "_" | |
551 | |
552 /* This is how to store into the string LABEL | |
553 the symbol_ref name of an internal numbered label where | |
554 PREFIX is the class of label and NUM is the number within the class. | |
555 This is suitable for output with `assemble_name'. */ | |
556 | |
557 #define ASM_GENERATE_INTERNAL_LABEL(LABEL,PREFIX,NUM) \ | |
558 sprintf (LABEL, "*%s%ld", PREFIX, (long)(NUM)) | |
559 | |
560 /* This is how to output an insn to push a register on the stack. | |
561 It need not be very fast code. */ | |
562 | |
563 #define ASM_OUTPUT_REG_PUSH(FILE,REGNO) \ | |
564 fprintf (FILE, "\tpushl %s\n", reg_names[REGNO]) | |
565 | |
566 /* This is how to output an insn to pop a register from the stack. | |
567 It need not be very fast code. */ | |
568 | |
569 #define ASM_OUTPUT_REG_POP(FILE,REGNO) \ | |
570 fprintf (FILE, "\tmovl (%s)+,%s\n", reg_names[STACK_POINTER_REGNUM], \ | |
571 reg_names[REGNO]) | |
572 | |
573 /* This is how to output an element of a case-vector that is absolute. | |
574 (The VAX does not use such vectors, | |
575 but we must define this macro anyway.) */ | |
576 | |
577 #define ASM_OUTPUT_ADDR_VEC_ELT(FILE, VALUE) \ | |
578 do \ | |
579 { \ | |
580 char label[256]; \ | |
581 ASM_GENERATE_INTERNAL_LABEL (label, "L", (VALUE));\ | |
582 fprintf (FILE, "\t.long "); \ | |
583 assemble_name (FILE, label); \ | |
584 fprintf (FILE, "\n"); \ | |
585 } \ | |
586 while (0) | |
587 | |
588 /* This is how to output an element of a case-vector that is relative. */ | |
589 | |
590 #define ASM_OUTPUT_ADDR_DIFF_ELT(FILE, BODY, VALUE, REL) \ | |
591 do \ | |
592 { \ | |
593 char label[256]; \ | |
594 ASM_GENERATE_INTERNAL_LABEL (label, "L", (VALUE)); \ | |
595 fprintf (FILE, "\t.word "); \ | |
596 assemble_name (FILE, label); \ | |
597 ASM_GENERATE_INTERNAL_LABEL (label, "L", (REL)); \ | |
598 fprintf (FILE, "-"); \ | |
599 assemble_name (FILE, label); \ | |
600 fprintf (FILE, "\n"); \ | |
601 } \ | |
602 while (0) | |
603 | |
604 /* This is how to output an assembler line | |
605 that says to advance the location counter | |
606 to a multiple of 2**LOG bytes. */ | |
607 | |
608 #define ASM_OUTPUT_ALIGN(FILE,LOG) \ | |
609 fprintf (FILE, "\t.align %d\n", (LOG)) | |
610 | |
611 /* This is how to output an assembler line | |
612 that says to advance the location counter by SIZE bytes. */ | |
613 | |
614 #define ASM_OUTPUT_SKIP(FILE,SIZE) \ | |
615 fprintf (FILE, "\t.space %u\n", (int)(SIZE)) | |
616 | |
617 /* This says how to output an assembler line | |
618 to define a global common symbol. */ | |
619 | |
620 #define ASM_OUTPUT_COMMON(FILE, NAME, SIZE, ROUNDED) \ | |
621 ( fputs (".comm ", (FILE)), \ | |
622 assemble_name ((FILE), (NAME)), \ | |
623 fprintf ((FILE), ",%u\n", (int)(ROUNDED))) | |
624 | |
625 /* This says how to output an assembler line | |
626 to define a local common symbol. */ | |
627 | |
628 #define ASM_OUTPUT_LOCAL(FILE, NAME, SIZE, ROUNDED) \ | |
629 ( fputs (".lcomm ", (FILE)), \ | |
630 assemble_name ((FILE), (NAME)), \ | |
631 fprintf ((FILE), ",%u\n", (int)(ROUNDED))) | |
632 | |
633 /* Print an instruction operand X on file FILE. | |
634 CODE is the code from the %-spec that requested printing this operand; | |
635 if `%z3' was used to print operand 3, then CODE is 'z'. | |
636 | |
637 VAX operand formatting codes: | |
638 | |
639 letter print | |
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640 c direct branch condition |
0 | 641 C reverse branch condition |
642 D 64-bit immediate operand | |
643 B the low 8 bits of the complement of a constant operand | |
644 H the low 16 bits of the complement of a constant operand | |
645 M a mask for the N highest bits of a word | |
646 N the complement of a constant integer operand | |
647 P constant operand plus 1 | |
648 R 32 - constant operand | |
649 b the low 8 bits of a negated constant operand | |
650 h the low 16 bits of a negated constant operand | |
651 # 'd' or 'g' depending on whether dfloat or gfloat is used | |
652 | register prefix */ | |
653 | |
654 /* The purpose of D is to get around a quirk or bug in VAX assembler | |
655 whereby -1 in a 64-bit immediate operand means 0x00000000ffffffff, | |
656 which is not a 64-bit minus one. As a workaround, we output negative | |
657 values in hex. */ | |
658 #if HOST_BITS_PER_WIDE_INT == 64 | |
659 # define NEG_HWI_PRINT_HEX16 HOST_WIDE_INT_PRINT_HEX | |
660 #else | |
661 # define NEG_HWI_PRINT_HEX16 "0xffffffff%08lx" | |
662 #endif | |
663 | |
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664 #define PRINT_OPERAND_PUNCT_VALID_P(CODE) \ |
0 | 665 ((CODE) == '#' || (CODE) == '|') |
666 | |
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667 #define PRINT_OPERAND(FILE, X, CODE) \ |
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668 print_operand (FILE, X, CODE) |
0 | 669 |
670 /* Print a memory operand whose address is X, on file FILE. | |
671 This uses a function in output-vax.c. */ | |
672 | |
673 #define PRINT_OPERAND_ADDRESS(FILE, ADDR) \ | |
674 print_operand_address (FILE, ADDR) | |
675 | |
676 /* This is a blatent lie. However, it's good enough, since we don't | |
677 actually have any code whatsoever for which this isn't overridden | |
678 by the proper FDE definition. */ | |
679 #define INCOMING_RETURN_ADDR_RTX gen_rtx_REG (Pmode, PC_REGNUM) | |
680 |