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8aeea6e6 | 1 | /* Definitions of target machine for GNU compiler. VAX version. |
7adcbafe | 2 | Copyright (C) 1987-2022 Free Software Foundation, Inc. |
ab835497 | 3 | |
e7d9d16b | 4 | This file is part of GCC. |
ab835497 | 5 | |
e7d9d16b | 6 | GCC is free software; you can redistribute it and/or modify |
ab835497 | 7 | it under the terms of the GNU General Public License as published by |
2f83c7d6 | 8 | the Free Software Foundation; either version 3, or (at your option) |
ab835497 RK |
9 | any later version. |
10 | ||
e7d9d16b | 11 | GCC is distributed in the hope that it will be useful, |
ab835497 RK |
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 | |
2f83c7d6 NC |
17 | along with GCC; see the file COPYING3. If not see |
18 | <http://www.gnu.org/licenses/>. */ | |
ab835497 RK |
19 | |
20 | ||
169274cd JT |
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) | |
ab835497 | 35 | |
6b857ce3 | 36 | /* Use -J option for long branch support with Unix assembler. */ |
a86d4a91 DA |
37 | |
38 | #define ASM_SPEC "-J" | |
39 | ||
ab835497 RK |
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 | ||
ab835497 RK |
50 | /* Run-time compilation parameters selecting different hardware subsets. */ |
51 | ||
c15c90bb ZW |
52 | /* Nonzero if ELF. Redefined by vax/elf.h. */ |
53 | #define TARGET_ELF 0 | |
54 | ||
1df34d4d MR |
55 | /* Use BSD names for udiv and umod libgcc calls. */ |
56 | #define TARGET_BSD_DIVMOD 1 | |
57 | ||
ab835497 RK |
58 | /* Default target_flags if no switches specified. */ |
59 | ||
60 | #ifndef TARGET_DEFAULT | |
ec01703c | 61 | #define TARGET_DEFAULT (MASK_UNIX_ASM) |
ab835497 | 62 | #endif |
3dc85dfb | 63 | |
ab835497 RK |
64 | \f |
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. | |
8aeea6e6 | 69 | This is not true on the VAX. */ |
ab835497 RK |
70 | #define BITS_BIG_ENDIAN 0 |
71 | ||
72 | /* Define this if most significant byte of a word is the lowest numbered. */ | |
8aeea6e6 | 73 | /* That is not true on the VAX. */ |
ab835497 RK |
74 | #define BYTES_BIG_ENDIAN 0 |
75 | ||
76 | /* Define this if most significant word of a multiword number is the lowest | |
77 | numbered. */ | |
8aeea6e6 | 78 | /* This is not true on the VAX. */ |
ab835497 RK |
79 | #define WORDS_BIG_ENDIAN 0 |
80 | ||
ab835497 RK |
81 | /* Width of a word, in units (bytes). */ |
82 | #define UNITS_PER_WORD 4 | |
83 | ||
ab835497 RK |
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 | ||
43a88a8c | 96 | /* A bit-field declared as `int' forces `int' alignment for the struct. */ |
c4e75102 | 97 | #define PCC_BITFIELD_TYPE_MATTERS (! TARGET_VAXC_ALIGNMENT) |
ab835497 RK |
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 | ||
8433ffc5 | 105 | /* Set this nonzero if move instructions will actually fail to work |
ab835497 | 106 | when given unaligned data. */ |
8433ffc5 | 107 | #define STRICT_ALIGNMENT 0 |
b4ac57ab RS |
108 | |
109 | /* Let's keep the stack somewhat aligned. */ | |
110 | #define STACK_BOUNDARY 32 | |
76ce4776 R |
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 | |
ab835497 RK |
115 | \f |
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. */ | |
e552abe2 | 123 | #define FIRST_PSEUDO_REGISTER 17 |
ab835497 RK |
124 | |
125 | /* 1 for registers that have pervasive standard uses | |
126 | and are not available for the register allocator. | |
8aeea6e6 | 127 | On the VAX, these are the AP, FP, SP and PC. */ |
e552abe2 | 128 | #define FIXED_REGISTERS {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1} |
ab835497 RK |
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. */ | |
e552abe2 | 136 | #define CALL_USED_REGISTERS {1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1} |
ab835497 | 137 | |
ab835497 RK |
138 | /* Specify the registers used for certain standard purposes. |
139 | The values of these macros are register numbers. */ | |
140 | ||
8aeea6e6 | 141 | /* VAX pc is overloaded on a register. */ |
0f8def68 | 142 | #define PC_REGNUM VAX_PC_REGNUM |
ab835497 RK |
143 | |
144 | /* Register to use for pushing function arguments. */ | |
0f8def68 | 145 | #define STACK_POINTER_REGNUM VAX_SP_REGNUM |
ab835497 RK |
146 | |
147 | /* Base register for access to local variables of the function. */ | |
0f8def68 | 148 | #define FRAME_POINTER_REGNUM VAX_FP_REGNUM |
ab835497 | 149 | |
c4e75102 MT |
150 | /* Offset from the frame pointer register value to the top of stack. */ |
151 | #define FRAME_POINTER_CFA_OFFSET(FNDECL) 0 | |
152 | ||
ab835497 | 153 | /* Base register for access to arguments of the function. */ |
0f8def68 | 154 | #define ARG_POINTER_REGNUM VAX_AP_REGNUM |
ab835497 RK |
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. */ | |
f289e226 | 161 | #define VAX_STRUCT_VALUE_REGNUM 1 |
ab835497 RK |
162 | \f |
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. */ | |
d001241c | 182 | |
8aeea6e6 | 183 | /* The VAX has only one kind of registers, so NO_REGS and ALL_REGS |
ab835497 RK |
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 | ||
6b857ce3 | 195 | /* Give names of register classes as strings for dump file. */ |
ab835497 | 196 | |
d001241c JBG |
197 | #define REG_CLASS_NAMES \ |
198 | { "NO_REGS", "ALL_REGS" } | |
ab835497 RK |
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 | ||
2fd58acb | 204 | #define REG_CLASS_CONTENTS {{0}, {0xffff}} |
ab835497 RK |
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 | ||
c9850009 | 211 | #define REGNO_REG_CLASS(REGNO) ((void)(REGNO), ALL_REGS) |
ab835497 RK |
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 | ||
ab835497 RK |
218 | \f |
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. */ | |
62f9f30b | 223 | #define STACK_GROWS_DOWNWARD 1 |
ab835497 | 224 | |
a4d05547 | 225 | /* Define this to nonzero if the nominal address of the stack frame |
ab835497 RK |
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. */ | |
f62c8a5c | 229 | #define FRAME_GROWS_DOWNWARD 1 |
ab835497 | 230 | |
5c3fd367 RS |
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. */ | |
0a81f074 | 234 | #define DYNAMIC_CHAIN_ADDRESS(FRAME) plus_constant (Pmode, (FRAME), 12) |
5c3fd367 | 235 | |
ab835497 RK |
236 | /* If we generate an insn to push BYTES bytes, |
237 | this says how many the stack pointer really advances by. | |
8aeea6e6 | 238 | On the VAX, -(sp) pushes only the bytes of the operands. */ |
ab835497 RK |
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 | ||
ab835497 RK |
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 | ||
d001241c | 249 | /* On the VAX the return value is in R0 regardless. */ |
ab835497 | 250 | |
d001241c | 251 | #define FUNCTION_VALUE(VALTYPE, FUNC) \ |
c5c76735 | 252 | gen_rtx_REG (TYPE_MODE (VALTYPE), 0) |
ab835497 RK |
253 | |
254 | /* Define how to find the value returned by a library function | |
255 | assuming the value has mode MODE. */ | |
256 | ||
d001241c | 257 | /* On the VAX the return value is in R0 regardless. */ |
ab835497 | 258 | |
c5c76735 | 259 | #define LIBCALL_VALUE(MODE) gen_rtx_REG (MODE, 0) |
ab835497 RK |
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. | |
8aeea6e6 | 267 | On the VAX, R0 is the only register thus used. */ |
ab835497 RK |
268 | |
269 | #define FUNCTION_VALUE_REGNO_P(N) ((N) == 0) | |
270 | ||
271 | /* 1 if N is a possible register number for function argument passing. | |
8aeea6e6 | 272 | On the VAX, no registers are used in this way. */ |
ab835497 | 273 | |
f43856db | 274 | #define FUNCTION_ARG_REGNO_P(N) ((void) (N), 0) |
ab835497 RK |
275 | \f |
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 | ||
8aeea6e6 | 282 | On the VAX, this is a single integer, which is a number of bytes |
ab835497 RK |
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 | ||
8aeea6e6 | 291 | On the VAX, the offset starts at 0. */ |
ab835497 | 292 | |
0f6937fe | 293 | #define INIT_CUMULATIVE_ARGS(CUM, FNTYPE, LIBNAME, INDIRECT, N_NAMED_ARGS) \ |
ab835497 RK |
294 | ((CUM) = 0) |
295 | ||
ab835497 RK |
296 | /* Output assembler code to FILE to increment profiler label # LABELNO |
297 | for profiling a function entry. */ | |
298 | ||
191fe2bb JT |
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) | |
ab835497 | 311 | |
978fc7d4 BE |
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 | ||
ab835497 RK |
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 | ||
ab835497 RK |
329 | /* Length in units of the trampoline for entering a nested function. */ |
330 | ||
331 | #define TRAMPOLINE_SIZE 15 | |
332 | ||
4f069e14 RK |
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 | ||
d001241c JBG |
343 | #define RETURN_ADDR_RTX(COUNT, FRAME) \ |
344 | ((COUNT == 0) \ | |
0a81f074 RS |
345 | ? gen_rtx_MEM (Pmode, plus_constant (Pmode, FRAME, \ |
346 | RETURN_ADDRESS_OFFSET)) \ | |
9704efe6 | 347 | : (rtx) 0) |
4f069e14 | 348 | |
ab835497 RK |
349 | \f |
350 | /* Addressing modes, and classification of registers for them. */ | |
351 | ||
940da324 | 352 | #define HAVE_POST_INCREMENT 1 |
ab835497 | 353 | |
940da324 | 354 | #define HAVE_PRE_DECREMENT 1 |
ab835497 RK |
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 | |
e53b6e56 | 362 | has been allocated, which happens in reginfo.cc during register |
aeb9f7cf | 363 | allocation. */ |
ab835497 | 364 | |
d001241c JBG |
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) | |
ab835497 RK |
369 | \f |
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 | ||
fbf55580 | 376 | #define CONSTANT_ADDRESS_P(X) legitimate_constant_address_p (X) |
ab835497 | 377 | |
ab835497 RK |
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 | |
fbf55580 | 396 | |
ab835497 RK |
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)) | |
fbf55580 | 405 | |
ab835497 RK |
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 | ||
fbf55580 | 409 | #endif |
ab835497 RK |
410 | \f |
411 | /* Specify the machine mode that this machine uses | |
412 | for the index in the tablejump instruction. */ | |
413 | #define CASE_VECTOR_MODE HImode | |
414 | ||
18543a22 ILT |
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. | |
6b857ce3 | 418 | Do not define this if the table should contain absolute addresses. */ |
18543a22 | 419 | #define CASE_VECTOR_PC_RELATIVE 1 |
ab835497 | 420 | |
b6aa31c5 JT |
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 | ||
ab835497 RK |
425 | /* Define this as 1 if `char' should by default be signed; else as 0. */ |
426 | #define DEFAULT_SIGNED_CHAR 1 | |
427 | ||
ab835497 RK |
428 | /* Max number of bytes we can move from memory to memory |
429 | in one reasonably fast instruction. */ | |
430 | #define MOVE_MAX 8 | |
431 | ||
c4e75102 | 432 | /* If a memory-to-memory move would take MOVE_RATIO or more simple |
76715c32 | 433 | move-instruction pairs, we will do a cpymem or libcall instead. */ |
c4e75102 MT |
434 | #define MOVE_RATIO(speed) ((speed) ? 6 : 3) |
435 | #define CLEAR_RATIO(speed) ((speed) ? 6 : 2) | |
3057f1ab | 436 | #define SET_RATIO(speed) ((speed) ? 6 : 2) |
c4e75102 | 437 | |
ab835497 RK |
438 | /* Nonzero if access to memory by bytes is slow and undesirable. */ |
439 | #define SLOW_BYTE_ACCESS 0 | |
440 | ||
441 | /* Define if shifts truncate the shift count | |
442 | which implies one can omit a sign-extension or zero-extension | |
443 | of a shift count. */ | |
444 | /* #define SHIFT_COUNT_TRUNCATED */ | |
445 | ||
85f5a7d6 MR |
446 | /* We need to reject symbol references in PIC code except for address |
447 | loads, handled elsewhere. */ | |
448 | #define LEGITIMATE_PIC_OPERAND_P(x) \ | |
449 | vax_acceptable_pic_operand_p ((x), false, false) | |
450 | ||
ab835497 RK |
451 | /* Specify the machine mode that pointers have. |
452 | After generation of rtl, the compiler makes no further distinction | |
453 | between pointers and any other objects of this machine mode. */ | |
454 | #define Pmode SImode | |
455 | ||
456 | /* A function address in a call instruction | |
457 | is a byte address (for indexing purposes) | |
458 | so give the MEM rtx a byte's mode. */ | |
459 | #define FUNCTION_MODE QImode | |
460 | ||
ab835497 RK |
461 | /* Specify the cost of a branch insn; roughly the number of extra insns that |
462 | should be added to avoid a branch. | |
463 | ||
464 | Branches are extremely cheap on the VAX while the shift insns often | |
465 | used to replace branches can be expensive. */ | |
466 | ||
3a4fd356 | 467 | #define BRANCH_COST(speed_p, predictable_p) 0 |
ab835497 | 468 | \f |
e552abe2 MR |
469 | /* Given a comparison code (NE, EQ, etc.) and the operands of a COMPARE, |
470 | return the mode to be used for the comparison. As we have the same | |
471 | interpretation of condition codes across all the instructions we just | |
472 | return the narrowest mode suitable for the comparison code requested. */ | |
473 | #define SELECT_CC_MODE(OP, X, Y) vax_select_cc_mode (OP, X, Y) | |
ab835497 RK |
474 | \f |
475 | /* Control the assembler format that we output. */ | |
476 | ||
72f03fde JDA |
477 | /* A C string constant describing how to begin a comment in the target |
478 | assembler language. The compiler assumes that the comment will end at | |
479 | the end of the line. */ | |
480 | ||
481 | #define ASM_COMMENT_START "#" | |
482 | ||
ab835497 RK |
483 | /* Output to assembler file text saying following lines |
484 | may contain character constants, extra white space, comments, etc. */ | |
485 | ||
486 | #define ASM_APP_ON "#APP\n" | |
487 | ||
488 | /* Output to assembler file text saying following lines | |
489 | no longer contain unusual constructs. */ | |
490 | ||
491 | #define ASM_APP_OFF "#NO_APP\n" | |
492 | ||
493 | /* Output before read-only data. */ | |
494 | ||
471b6f1b | 495 | #define TEXT_SECTION_ASM_OP "\t.text" |
ab835497 RK |
496 | |
497 | /* Output before writable data. */ | |
498 | ||
471b6f1b | 499 | #define DATA_SECTION_ASM_OP "\t.data" |
ab835497 RK |
500 | |
501 | /* How to refer to registers in assembler output. | |
23361093 MT |
502 | This sequence is indexed by compiler's hard-register-number (see above). |
503 | The register names will be prefixed by REGISTER_PREFIX, if any. */ | |
ab835497 | 504 | |
23361093 | 505 | #define REGISTER_PREFIX "" |
d001241c JBG |
506 | #define REGISTER_NAMES \ |
507 | { "r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7", \ | |
e552abe2 MR |
508 | "r8", "r9", "r10", "r11", "ap", "fp", "sp", "pc", \ |
509 | "psl" } | |
ab835497 RK |
510 | |
511 | /* This is BSD, so it wants DBX format. */ | |
512 | ||
23532de9 | 513 | #define DBX_DEBUGGING_INFO 1 |
ab835497 | 514 | |
ab835497 RK |
515 | /* Do not break .stabs pseudos into continuations. */ |
516 | ||
517 | #define DBX_CONTIN_LENGTH 0 | |
518 | ||
519 | /* This is the char to use for continuation (in case we need to turn | |
520 | continuation back on). */ | |
521 | ||
522 | #define DBX_CONTIN_CHAR '?' | |
523 | ||
524 | /* Don't use the `xsfoo;' construct in DBX output; this system | |
525 | doesn't support it. */ | |
526 | ||
527 | #define DBX_NO_XREFS | |
528 | ||
529 | /* Output the .stabs for a C `static' variable in the data section. */ | |
530 | #define DBX_STATIC_STAB_DATA_SECTION | |
531 | ||
8aeea6e6 | 532 | /* VAX specific: which type character is used for type double? */ |
ab835497 RK |
533 | |
534 | #define ASM_DOUBLE_CHAR (TARGET_G_FLOAT ? 'g' : 'd') | |
535 | ||
ab835497 RK |
536 | /* This is how to output a command to make the user-level label named NAME |
537 | defined for reference from other files. */ | |
538 | ||
506a61b1 KG |
539 | /* Globalizing directive for a label. */ |
540 | #define GLOBAL_ASM_OP ".globl " | |
ab835497 | 541 | |
6b857ce3 | 542 | /* The prefix to add to user-visible assembler symbols. */ |
ab835497 | 543 | |
4e0c8ad2 | 544 | #define USER_LABEL_PREFIX "_" |
ab835497 | 545 | |
ab835497 RK |
546 | /* This is how to store into the string LABEL |
547 | the symbol_ref name of an internal numbered label where | |
548 | PREFIX is the class of label and NUM is the number within the class. | |
549 | This is suitable for output with `assemble_name'. */ | |
550 | ||
551 | #define ASM_GENERATE_INTERNAL_LABEL(LABEL,PREFIX,NUM) \ | |
ace49484 | 552 | sprintf (LABEL, "*%s%ld", PREFIX, (long)(NUM)) |
ab835497 | 553 | |
ab835497 RK |
554 | /* This is how to output an insn to push a register on the stack. |
555 | It need not be very fast code. */ | |
556 | ||
557 | #define ASM_OUTPUT_REG_PUSH(FILE,REGNO) \ | |
558 | fprintf (FILE, "\tpushl %s\n", reg_names[REGNO]) | |
559 | ||
560 | /* This is how to output an insn to pop a register from the stack. | |
561 | It need not be very fast code. */ | |
562 | ||
d001241c JBG |
563 | #define ASM_OUTPUT_REG_POP(FILE,REGNO) \ |
564 | fprintf (FILE, "\tmovl (%s)+,%s\n", reg_names[STACK_POINTER_REGNUM], \ | |
b6aa31c5 | 565 | reg_names[REGNO]) |
ab835497 RK |
566 | |
567 | /* This is how to output an element of a case-vector that is absolute. | |
8aeea6e6 | 568 | (The VAX does not use such vectors, |
ab835497 RK |
569 | but we must define this macro anyway.) */ |
570 | ||
b6aa31c5 JT |
571 | #define ASM_OUTPUT_ADDR_VEC_ELT(FILE, VALUE) \ |
572 | do \ | |
573 | { \ | |
574 | char label[256]; \ | |
575 | ASM_GENERATE_INTERNAL_LABEL (label, "L", (VALUE));\ | |
576 | fprintf (FILE, "\t.long "); \ | |
577 | assemble_name (FILE, label); \ | |
578 | fprintf (FILE, "\n"); \ | |
579 | } \ | |
580 | while (0) | |
ab835497 RK |
581 | |
582 | /* This is how to output an element of a case-vector that is relative. */ | |
583 | ||
b6aa31c5 JT |
584 | #define ASM_OUTPUT_ADDR_DIFF_ELT(FILE, BODY, VALUE, REL) \ |
585 | do \ | |
586 | { \ | |
587 | char label[256]; \ | |
588 | ASM_GENERATE_INTERNAL_LABEL (label, "L", (VALUE)); \ | |
589 | fprintf (FILE, "\t.word "); \ | |
590 | assemble_name (FILE, label); \ | |
591 | ASM_GENERATE_INTERNAL_LABEL (label, "L", (REL)); \ | |
592 | fprintf (FILE, "-"); \ | |
593 | assemble_name (FILE, label); \ | |
594 | fprintf (FILE, "\n"); \ | |
595 | } \ | |
596 | while (0) | |
ab835497 RK |
597 | |
598 | /* This is how to output an assembler line | |
599 | that says to advance the location counter | |
600 | to a multiple of 2**LOG bytes. */ | |
601 | ||
602 | #define ASM_OUTPUT_ALIGN(FILE,LOG) \ | |
603 | fprintf (FILE, "\t.align %d\n", (LOG)) | |
604 | ||
605 | /* This is how to output an assembler line | |
606 | that says to advance the location counter by SIZE bytes. */ | |
607 | ||
608 | #define ASM_OUTPUT_SKIP(FILE,SIZE) \ | |
58e15542 | 609 | fprintf (FILE, "\t.space %u\n", (int)(SIZE)) |
ab835497 RK |
610 | |
611 | /* This says how to output an assembler line | |
612 | to define a global common symbol. */ | |
613 | ||
d001241c JBG |
614 | #define ASM_OUTPUT_COMMON(FILE, NAME, SIZE, ROUNDED) \ |
615 | ( fputs (".comm ", (FILE)), \ | |
616 | assemble_name ((FILE), (NAME)), \ | |
617 | fprintf ((FILE), ",%u\n", (int)(ROUNDED))) | |
ab835497 RK |
618 | |
619 | /* This says how to output an assembler line | |
620 | to define a local common symbol. */ | |
621 | ||
d001241c JBG |
622 | #define ASM_OUTPUT_LOCAL(FILE, NAME, SIZE, ROUNDED) \ |
623 | ( fputs (".lcomm ", (FILE)), \ | |
624 | assemble_name ((FILE), (NAME)), \ | |
625 | fprintf ((FILE), ",%u\n", (int)(ROUNDED))) | |
ab835497 | 626 | |
ab835497 RK |
627 | /* Print an instruction operand X on file FILE. |
628 | CODE is the code from the %-spec that requested printing this operand; | |
629 | if `%z3' was used to print operand 3, then CODE is 'z'. | |
985b3bdd RS |
630 | |
631 | VAX operand formatting codes: | |
632 | ||
633 | letter print | |
f90b7a5a | 634 | c direct branch condition |
985b3bdd | 635 | C reverse branch condition |
61fcaf9e | 636 | D 64-bit immediate operand |
985b3bdd RS |
637 | B the low 8 bits of the complement of a constant operand |
638 | H the low 16 bits of the complement of a constant operand | |
bb5794b9 | 639 | M a mask for the N highest bits of a word |
985b3bdd RS |
640 | N the complement of a constant integer operand |
641 | P constant operand plus 1 | |
642 | R 32 - constant operand | |
643 | b the low 8 bits of a negated constant operand | |
644 | h the low 16 bits of a negated constant operand | |
191fe2bb JT |
645 | # 'd' or 'g' depending on whether dfloat or gfloat is used |
646 | | register prefix */ | |
ab835497 | 647 | |
8aeea6e6 | 648 | /* The purpose of D is to get around a quirk or bug in VAX assembler |
61fcaf9e | 649 | whereby -1 in a 64-bit immediate operand means 0x00000000ffffffff, |
72f03fde JDA |
650 | which is not a 64-bit minus one. As a workaround, we output negative |
651 | values in hex. */ | |
652 | #if HOST_BITS_PER_WIDE_INT == 64 | |
653 | # define NEG_HWI_PRINT_HEX16 HOST_WIDE_INT_PRINT_HEX | |
654 | #else | |
655 | # define NEG_HWI_PRINT_HEX16 "0xffffffff%08lx" | |
656 | #endif | |
61fcaf9e | 657 | |
c4e75102 | 658 | #define PRINT_OPERAND_PUNCT_VALID_P(CODE) \ |
b6aa31c5 | 659 | ((CODE) == '#' || (CODE) == '|') |
ab835497 | 660 | |
c4e75102 MT |
661 | #define PRINT_OPERAND(FILE, X, CODE) \ |
662 | print_operand (FILE, X, CODE) | |
ab835497 RK |
663 | |
664 | /* Print a memory operand whose address is X, on file FILE. | |
665 | This uses a function in output-vax.c. */ | |
666 | ||
667 | #define PRINT_OPERAND_ADDRESS(FILE, ADDR) \ | |
d001241c | 668 | print_operand_address (FILE, ADDR) |
b6aa31c5 JT |
669 | |
670 | /* This is a blatent lie. However, it's good enough, since we don't | |
671 | actually have any code whatsoever for which this isn't overridden | |
672 | by the proper FDE definition. */ | |
673 | #define INCOMING_RETURN_ADDR_RTX gen_rtx_REG (Pmode, PC_REGNUM) | |
d001241c | 674 | |
a17ab4b6 MR |
675 | /* Upon failure to find the bit the FFS hardware instruction returns |
676 | the position of the bit immediately following the field specified. */ | |
677 | #define CTZ_DEFINED_VALUE_AT_ZERO(MODE, VALUE) \ | |
678 | ((VALUE) = GET_MODE_BITSIZE (MODE), 2) |