1 /* Definitions of target machine for GNU compiler. VAX version.
2 Copyright (C) 1987, 1988, 1991, 1993, 1994, 1995, 1996, 1997, 1998,
3 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2007, 2008, 2009
4 Free Software Foundation, Inc.
6 This file is part of GCC.
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)
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.
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/>. */
23 /* Target CPU builtins. */
24 #define TARGET_CPU_CPP_BUILTINS() \
27 builtin_define ("__vax__"); \
28 builtin_assert ("cpu=vax"); \
29 builtin_assert ("machine=vax"); \
32 builtin_define ("__GFLOAT"); \
33 builtin_define ("__GFLOAT__"); \
40 /* Use -J option for long branch support with Unix assembler. */
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. */
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}}"
54 /* Print subsidiary information on the compiler version in use. */
56 #ifndef TARGET_NAME /* A more specific value might be supplied via -D. */
57 #define TARGET_NAME "vax"
59 #define TARGET_VERSION fprintf (stderr, " (%s)", TARGET_NAME)
61 /* Run-time compilation parameters selecting different hardware subsets. */
63 /* Nonzero if ELF. Redefined by vax/elf.h. */
66 /* Use BSD names for udiv and umod libgcc calls. */
67 #define TARGET_BSD_DIVMOD 1
69 /* Default target_flags if no switches specified. */
71 #ifndef TARGET_DEFAULT
72 #define TARGET_DEFAULT (MASK_UNIX_ASM)
75 #define OVERRIDE_OPTIONS override_options ()
78 /* Target machine storage layout */
80 /* Define this if most significant bit is lowest numbered
81 in instructions that operate on numbered bit-fields.
82 This is not true on the VAX. */
83 #define BITS_BIG_ENDIAN 0
85 /* Define this if most significant byte of a word is the lowest numbered. */
86 /* That is not true on the VAX. */
87 #define BYTES_BIG_ENDIAN 0
89 /* Define this if most significant word of a multiword number is the lowest
91 /* This is not true on the VAX. */
92 #define WORDS_BIG_ENDIAN 0
94 /* Width of a word, in units (bytes). */
95 #define UNITS_PER_WORD 4
97 /* Allocation boundary (in *bits*) for storing arguments in argument list. */
98 #define PARM_BOUNDARY 32
100 /* Allocation boundary (in *bits*) for the code of a function. */
101 #define FUNCTION_BOUNDARY 16
103 /* Alignment of field after `int : 0' in a structure. */
104 #define EMPTY_FIELD_BOUNDARY (TARGET_VAXC_ALIGNMENT ? 8 : 32)
106 /* Every structure's size must be a multiple of this. */
107 #define STRUCTURE_SIZE_BOUNDARY 8
109 /* A bit-field declared as `int' forces `int' alignment for the struct. */
110 #define PCC_BITFIELD_TYPE_MATTERS (! TARGET_VAXC_ALIGNMENT)
112 /* No data type wants to be aligned rounder than this. */
113 #define BIGGEST_ALIGNMENT 32
115 /* No structure field wants to be aligned rounder than this. */
116 #define BIGGEST_FIELD_ALIGNMENT (TARGET_VAXC_ALIGNMENT ? 8 : 32)
118 /* Set this nonzero if move instructions will actually fail to work
119 when given unaligned data. */
120 #define STRICT_ALIGNMENT 0
122 /* Let's keep the stack somewhat aligned. */
123 #define STACK_BOUNDARY 32
125 /* The table of an ADDR_DIFF_VEC must be contiguous with the case
126 opcode, it is part of the case instruction. */
127 #define ADDR_VEC_ALIGN(ADDR_VEC) 0
129 /* Standard register usage. */
131 /* Number of actual hardware registers.
132 The hardware registers are assigned numbers for the compiler
133 from 0 to just below FIRST_PSEUDO_REGISTER.
134 All registers that the compiler knows about must be given numbers,
135 even those that are not normally considered general registers. */
136 #define FIRST_PSEUDO_REGISTER 16
138 /* 1 for registers that have pervasive standard uses
139 and are not available for the register allocator.
140 On the VAX, these are the AP, FP, SP and PC. */
141 #define FIXED_REGISTERS {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1}
143 /* 1 for registers not available across function calls.
144 These must include the FIXED_REGISTERS and also any
145 registers that can be used without being saved.
146 The latter must include the registers where values are returned
147 and the register where structure-value addresses are passed.
148 Aside from that, you can include as many other registers as you like. */
149 #define CALL_USED_REGISTERS {1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1}
151 /* Return number of consecutive hard regs needed starting at reg REGNO
152 to hold something of mode MODE.
153 This is ordinarily the length in words of a value of mode MODE
154 but can be less for certain modes in special long registers.
155 On the VAX, all registers are one word long. */
156 #define HARD_REGNO_NREGS(REGNO, MODE) \
157 ((GET_MODE_SIZE (MODE) + UNITS_PER_WORD - 1) / UNITS_PER_WORD)
159 /* Value is 1 if hard register REGNO can hold a value of machine-mode MODE.
160 On the VAX, all registers can hold all modes. */
161 #define HARD_REGNO_MODE_OK(REGNO, MODE) 1
163 /* Value is 1 if it is a good idea to tie two pseudo registers
164 when one has mode MODE1 and one has mode MODE2.
165 If HARD_REGNO_MODE_OK could produce different values for MODE1 and MODE2,
166 for any hard reg, then this must be 0 for correct output. */
167 #define MODES_TIEABLE_P(MODE1, MODE2) 1
169 /* Specify the registers used for certain standard purposes.
170 The values of these macros are register numbers. */
172 /* VAX pc is overloaded on a register. */
173 #define PC_REGNUM VAX_PC_REGNUM
175 /* Register to use for pushing function arguments. */
176 #define STACK_POINTER_REGNUM VAX_SP_REGNUM
178 /* Base register for access to local variables of the function. */
179 #define FRAME_POINTER_REGNUM VAX_FP_REGNUM
181 /* Offset from the frame pointer register value to the top of stack. */
182 #define FRAME_POINTER_CFA_OFFSET(FNDECL) 0
184 /* Base register for access to arguments of the function. */
185 #define ARG_POINTER_REGNUM VAX_AP_REGNUM
187 /* Register in which static-chain is passed to a function. */
188 #define STATIC_CHAIN_REGNUM 0
190 /* Register in which address to store a structure value
191 is passed to a function. */
192 #define VAX_STRUCT_VALUE_REGNUM 1
194 /* Define the classes of registers for register constraints in the
195 machine description. Also define ranges of constants.
197 One of the classes must always be named ALL_REGS and include all hard regs.
198 If there is more than one class, another class must be named NO_REGS
199 and contain no registers.
201 The name GENERAL_REGS must be the name of a class (or an alias for
202 another name such as ALL_REGS). This is the class of registers
203 that is allowed by "g" or "r" in a register constraint.
204 Also, registers outside this class are allocated only when
205 instructions express preferences for them.
207 The classes must be numbered in nondecreasing order; that is,
208 a larger-numbered class must never be contained completely
209 in a smaller-numbered class.
211 For any two classes, it is very desirable that there be another
212 class that represents their union. */
214 /* The VAX has only one kind of registers, so NO_REGS and ALL_REGS
215 are the only classes. */
217 enum reg_class { NO_REGS, ALL_REGS, LIM_REG_CLASSES };
219 #define N_REG_CLASSES (int) LIM_REG_CLASSES
221 /* Since GENERAL_REGS is the same class as ALL_REGS,
222 don't give it a different class number; just make it an alias. */
224 #define GENERAL_REGS ALL_REGS
226 /* Give names of register classes as strings for dump file. */
228 #define REG_CLASS_NAMES \
229 { "NO_REGS", "ALL_REGS" }
231 /* The following macro defines cover classes for Integrated Register
232 Allocator. Cover classes is a set of non-intersected register
233 classes covering all hard registers used for register allocation
234 purpose. Any move between two registers of a cover class should be
235 cheaper than load or store of the registers. The macro value is
236 array of register classes with LIM_REG_CLASSES used as the end
238 #define IRA_COVER_CLASSES { ALL_REGS, LIM_REG_CLASSES }
240 /* Return the maximum number of consecutive registers
241 needed to represent mode MODE in a register of class CLASS. */
242 #define CLASS_MAX_NREGS(CLASS, MODE) \
243 ((GET_MODE_SIZE (MODE) + UNITS_PER_WORD - 1) / UNITS_PER_WORD)
245 /* Define which registers fit in which classes.
246 This is an initializer for a vector of HARD_REG_SET
247 of length N_REG_CLASSES. */
249 #define REG_CLASS_CONTENTS {{0}, {0xffff}}
251 /* The same information, inverted:
252 Return the class number of the smallest class containing
253 reg number REGNO. This could be a conditional expression
254 or could index an array. */
256 #define REGNO_REG_CLASS(REGNO) ALL_REGS
258 /* The class value for index registers, and the one for base regs. */
260 #define INDEX_REG_CLASS ALL_REGS
261 #define BASE_REG_CLASS ALL_REGS
263 /* Given an rtx X being reloaded into a reg required to be
264 in class CLASS, return the class of reg to actually use.
265 In general this is just CLASS; but on some machines
266 in some cases it is preferable to use a more restrictive class. */
268 #define PREFERRED_RELOAD_CLASS(X,CLASS) (CLASS)
270 /* Return the maximum number of consecutive registers
271 needed to represent mode MODE in a register of class CLASS. */
272 /* On the VAX, this is always the size of MODE in words,
273 since all registers are the same size. */
274 #define CLASS_MAX_NREGS(CLASS, MODE) \
275 ((GET_MODE_SIZE (MODE) + UNITS_PER_WORD - 1) / UNITS_PER_WORD)
277 /* Stack layout; function entry, exit and calling. */
279 /* Define this if pushing a word on the stack
280 makes the stack pointer a smaller address. */
281 #define STACK_GROWS_DOWNWARD
283 /* Define this to nonzero if the nominal address of the stack frame
284 is at the high-address end of the local variables;
285 that is, each additional local variable allocated
286 goes at a more negative offset in the frame. */
287 #define FRAME_GROWS_DOWNWARD 1
289 /* Offset within stack frame to start allocating local variables at.
290 If FRAME_GROWS_DOWNWARD, this is the offset to the END of the
291 first local allocated. Otherwise, it is the offset to the BEGINNING
292 of the first local allocated. */
293 #define STARTING_FRAME_OFFSET 0
295 /* Given an rtx for the address of a frame,
296 return an rtx for the address of the word in the frame
297 that holds the dynamic chain--the previous frame's address. */
298 #define DYNAMIC_CHAIN_ADDRESS(FRAME) plus_constant ((FRAME), 12)
300 /* If we generate an insn to push BYTES bytes,
301 this says how many the stack pointer really advances by.
302 On the VAX, -(sp) pushes only the bytes of the operands. */
303 #define PUSH_ROUNDING(BYTES) (BYTES)
305 /* Offset of first parameter from the argument pointer register value. */
306 #define FIRST_PARM_OFFSET(FNDECL) 4
308 /* Value is the number of bytes of arguments automatically
309 popped when returning from a subroutine call.
310 FUNDECL is the declaration node of the function (as a tree),
311 FUNTYPE is the data type of the function (as a tree),
312 or for a library call it is an identifier node for the subroutine name.
313 SIZE is the number of bytes of arguments passed on the stack.
315 On the VAX, the RET insn pops a maximum of 255 args for any function. */
317 #define RETURN_POPS_ARGS(FUNDECL,FUNTYPE,SIZE) \
318 ((SIZE) > 255 * 4 ? 0 : (SIZE))
320 /* Define how to find the value returned by a function.
321 VALTYPE is the data type of the value (as a tree).
322 If the precise function being called is known, FUNC is its FUNCTION_DECL;
323 otherwise, FUNC is 0. */
325 /* On the VAX the return value is in R0 regardless. */
327 #define FUNCTION_VALUE(VALTYPE, FUNC) \
328 gen_rtx_REG (TYPE_MODE (VALTYPE), 0)
330 /* Define how to find the value returned by a library function
331 assuming the value has mode MODE. */
333 /* On the VAX the return value is in R0 regardless. */
335 #define LIBCALL_VALUE(MODE) gen_rtx_REG (MODE, 0)
337 /* Define this if PCC uses the nonreentrant convention for returning
338 structure and union values. */
340 #define PCC_STATIC_STRUCT_RETURN
342 /* 1 if N is a possible register number for a function value.
343 On the VAX, R0 is the only register thus used. */
345 #define FUNCTION_VALUE_REGNO_P(N) ((N) == 0)
347 /* 1 if N is a possible register number for function argument passing.
348 On the VAX, no registers are used in this way. */
350 #define FUNCTION_ARG_REGNO_P(N) 0
352 /* Define a data type for recording info about an argument list
353 during the scan of that argument list. This data type should
354 hold all necessary information about the function itself
355 and about the args processed so far, enough to enable macros
356 such as FUNCTION_ARG to determine where the next arg should go.
358 On the VAX, this is a single integer, which is a number of bytes
359 of arguments scanned so far. */
361 #define CUMULATIVE_ARGS int
363 /* Initialize a variable CUM of type CUMULATIVE_ARGS
364 for a call to a function whose data type is FNTYPE.
365 For a library call, FNTYPE is 0.
367 On the VAX, the offset starts at 0. */
369 #define INIT_CUMULATIVE_ARGS(CUM, FNTYPE, LIBNAME, INDIRECT, N_NAMED_ARGS) \
372 /* Update the data in CUM to advance over an argument
373 of mode MODE and data type TYPE.
374 (TYPE is null for libcalls where that information may not be available.) */
376 #define FUNCTION_ARG_ADVANCE(CUM, MODE, TYPE, NAMED) \
377 ((CUM) += ((MODE) != BLKmode \
378 ? (GET_MODE_SIZE (MODE) + 3) & ~3 \
379 : (int_size_in_bytes (TYPE) + 3) & ~3))
381 /* Define where to put the arguments to a function.
382 Value is zero to push the argument on the stack,
383 or a hard register in which to store the argument.
385 MODE is the argument's machine mode.
386 TYPE is the data type of the argument (as a tree).
387 This is null for libcalls where that information may
389 CUM is a variable of type CUMULATIVE_ARGS which gives info about
390 the preceding args and about the function being called.
391 NAMED is nonzero if this argument is a named parameter
392 (otherwise it is an extra parameter matching an ellipsis). */
394 /* On the VAX all args are pushed. */
396 #define FUNCTION_ARG(CUM, MODE, TYPE, NAMED) 0
398 /* Output assembler code to FILE to increment profiler label # LABELNO
399 for profiling a function entry. */
401 #define VAX_FUNCTION_PROFILER_NAME "mcount"
402 #define FUNCTION_PROFILER(FILE, LABELNO) \
406 ASM_GENERATE_INTERNAL_LABEL (label, "LP", (LABELNO)); \
407 fprintf (FILE, "\tmovab "); \
408 assemble_name (FILE, label); \
409 asm_fprintf (FILE, ",%Rr0\n\tjsb %s\n", \
410 VAX_FUNCTION_PROFILER_NAME); \
414 /* EXIT_IGNORE_STACK should be nonzero if, when returning from a function,
415 the stack pointer does not matter. The value is tested only in
416 functions that have frame pointers.
417 No definition is equivalent to always zero. */
419 #define EXIT_IGNORE_STACK 1
421 /* Store in the variable DEPTH the initial difference between the
422 frame pointer reg contents and the stack pointer reg contents,
423 as of the start of the function body. This depends on the layout
424 of the fixed parts of the stack frame and on how registers are saved.
426 On the VAX, FRAME_POINTER_REQUIRED is always 1, so the definition of this
427 macro doesn't matter. But it must be defined. */
429 #define INITIAL_FRAME_POINTER_OFFSET(DEPTH) (DEPTH) = 0;
431 /* Length in units of the trampoline for entering a nested function. */
433 #define TRAMPOLINE_SIZE 15
435 /* Byte offset of return address in a stack frame. The "saved PC" field
436 is in element [4] when treating the frame as an array of longwords. */
438 #define RETURN_ADDRESS_OFFSET (4 * UNITS_PER_WORD) /* 16 */
440 /* A C expression whose value is RTL representing the value of the return
441 address for the frame COUNT steps up from the current frame.
442 FRAMEADDR is already the frame pointer of the COUNT frame, so we
445 #define RETURN_ADDR_RTX(COUNT, FRAME) \
447 ? gen_rtx_MEM (Pmode, plus_constant (FRAME, RETURN_ADDRESS_OFFSET)) \
451 /* Addressing modes, and classification of registers for them. */
453 #define HAVE_POST_INCREMENT 1
455 #define HAVE_PRE_DECREMENT 1
457 /* Macros to check register numbers against specific register classes. */
459 /* These assume that REGNO is a hard or pseudo reg number.
460 They give nonzero only if REGNO is a hard reg of the suitable class
461 or a pseudo reg currently allocated to a suitable hard reg.
462 Since they use reg_renumber, they are safe only once reg_renumber
463 has been allocated, which happens in local-alloc.c. */
465 #define REGNO_OK_FOR_INDEX_P(regno) \
466 ((regno) < FIRST_PSEUDO_REGISTER || reg_renumber[regno] >= 0)
467 #define REGNO_OK_FOR_BASE_P(regno) \
468 ((regno) < FIRST_PSEUDO_REGISTER || reg_renumber[regno] >= 0)
470 /* Maximum number of registers that can appear in a valid memory address. */
472 #define MAX_REGS_PER_ADDRESS 2
474 /* 1 if X is an rtx for a constant that is a valid address. */
476 #define CONSTANT_ADDRESS_P(X) legitimate_constant_address_p (X)
478 /* Nonzero if the constant value X is a legitimate general operand.
479 It is given that X satisfies CONSTANT_P or is a CONST_DOUBLE. */
481 #define LEGITIMATE_CONSTANT_P(X) legitimate_constant_p (X)
483 /* The macros REG_OK_FOR..._P assume that the arg is a REG rtx
484 and check its validity for a certain class.
485 We have two alternate definitions for each of them.
486 The usual definition accepts all pseudo regs; the other rejects
487 them unless they have been allocated suitable hard regs.
488 The symbol REG_OK_STRICT causes the latter definition to be used.
490 Most source files want to accept pseudo regs in the hope that
491 they will get allocated to the class that the insn wants them to be in.
492 Source files for reload pass need to be strict.
493 After reload, it makes no difference, since pseudo regs have
494 been eliminated by then. */
496 #ifndef REG_OK_STRICT
498 /* Nonzero if X is a hard reg that can be used as an index
499 or if it is a pseudo reg. */
500 #define REG_OK_FOR_INDEX_P(X) 1
502 /* Nonzero if X is a hard reg that can be used as a base reg
503 or if it is a pseudo reg. */
504 #define REG_OK_FOR_BASE_P(X) 1
508 /* Nonzero if X is a hard reg that can be used as an index. */
509 #define REG_OK_FOR_INDEX_P(X) REGNO_OK_FOR_INDEX_P (REGNO (X))
511 /* Nonzero if X is a hard reg that can be used as a base reg. */
512 #define REG_OK_FOR_BASE_P(X) REGNO_OK_FOR_BASE_P (REGNO (X))
516 /* Go to LABEL if ADDR (a legitimate address expression)
517 has an effect that depends on the machine mode it is used for. */
518 #define GO_IF_MODE_DEPENDENT_ADDRESS(ADDR, LABEL) \
519 { if (vax_mode_dependent_address_p (ADDR)) goto LABEL; }
521 /* Specify the machine mode that this machine uses
522 for the index in the tablejump instruction. */
523 #define CASE_VECTOR_MODE HImode
525 /* Define as C expression which evaluates to nonzero if the tablejump
526 instruction expects the table to contain offsets from the address of the
528 Do not define this if the table should contain absolute addresses. */
529 #define CASE_VECTOR_PC_RELATIVE 1
531 /* Indicate that jump tables go in the text section. This is
532 necessary when compiling PIC code. */
533 #define JUMP_TABLES_IN_TEXT_SECTION 1
535 /* Define this as 1 if `char' should by default be signed; else as 0. */
536 #define DEFAULT_SIGNED_CHAR 1
538 /* This flag, if defined, says the same insns that convert to a signed fixnum
539 also convert validly to an unsigned one. */
540 #define FIXUNS_TRUNC_LIKE_FIX_TRUNC
542 /* Max number of bytes we can move from memory to memory
543 in one reasonably fast instruction. */
546 /* If a memory-to-memory move would take MOVE_RATIO or more simple
547 move-instruction pairs, we will do a movmem or libcall instead. */
548 #define MOVE_RATIO(speed) ((speed) ? 6 : 3)
549 #define CLEAR_RATIO(speed) ((speed) ? 6 : 2)
551 /* Nonzero if access to memory by bytes is slow and undesirable. */
552 #define SLOW_BYTE_ACCESS 0
554 /* Define if shifts truncate the shift count
555 which implies one can omit a sign-extension or zero-extension
557 /* #define SHIFT_COUNT_TRUNCATED */
559 /* Value is 1 if truncating an integer of INPREC bits to OUTPREC bits
560 is done just by pretending it is already truncated. */
561 #define TRULY_NOOP_TRUNCATION(OUTPREC, INPREC) 1
563 /* Specify the machine mode that pointers have.
564 After generation of rtl, the compiler makes no further distinction
565 between pointers and any other objects of this machine mode. */
568 /* A function address in a call instruction
569 is a byte address (for indexing purposes)
570 so give the MEM rtx a byte's mode. */
571 #define FUNCTION_MODE QImode
573 /* Specify the cost of a branch insn; roughly the number of extra insns that
574 should be added to avoid a branch.
576 Branches are extremely cheap on the VAX while the shift insns often
577 used to replace branches can be expensive. */
579 #define BRANCH_COST(speed_p, predictable_p) 0
581 /* Tell final.c how to eliminate redundant test instructions. */
583 /* Here we define machine-dependent flags and fields in cc_status
584 (see `conditions.h'). No extra ones are needed for the VAX. */
586 /* Store in cc_status the expressions
587 that the condition codes will describe
588 after execution of an instruction whose pattern is EXP.
589 Do not alter them if the instruction would not alter the cc's. */
591 #define NOTICE_UPDATE_CC(EXP, INSN) \
592 vax_notice_update_cc ((EXP), (INSN))
594 #define OUTPUT_JUMP(NORMAL, FLOAT, NO_OV) \
595 { if (cc_status.flags & CC_NO_OVERFLOW) \
600 /* Control the assembler format that we output. */
602 /* A C string constant describing how to begin a comment in the target
603 assembler language. The compiler assumes that the comment will end at
604 the end of the line. */
606 #define ASM_COMMENT_START "#"
608 /* Output to assembler file text saying following lines
609 may contain character constants, extra white space, comments, etc. */
611 #define ASM_APP_ON "#APP\n"
613 /* Output to assembler file text saying following lines
614 no longer contain unusual constructs. */
616 #define ASM_APP_OFF "#NO_APP\n"
618 /* Output before read-only data. */
620 #define TEXT_SECTION_ASM_OP "\t.text"
622 /* Output before writable data. */
624 #define DATA_SECTION_ASM_OP "\t.data"
626 /* How to refer to registers in assembler output.
627 This sequence is indexed by compiler's hard-register-number (see above).
628 The register names will be prefixed by REGISTER_PREFIX, if any. */
630 #define REGISTER_PREFIX ""
631 #define REGISTER_NAMES \
632 { "r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7", \
633 "r8", "r9", "r10", "r11", "ap", "fp", "sp", "pc", }
635 /* This is BSD, so it wants DBX format. */
637 #define DBX_DEBUGGING_INFO 1
639 /* Do not break .stabs pseudos into continuations. */
641 #define DBX_CONTIN_LENGTH 0
643 /* This is the char to use for continuation (in case we need to turn
644 continuation back on). */
646 #define DBX_CONTIN_CHAR '?'
648 /* Don't use the `xsfoo;' construct in DBX output; this system
649 doesn't support it. */
653 /* Output the .stabs for a C `static' variable in the data section. */
654 #define DBX_STATIC_STAB_DATA_SECTION
656 /* VAX specific: which type character is used for type double? */
658 #define ASM_DOUBLE_CHAR (TARGET_G_FLOAT ? 'g' : 'd')
660 /* This is how to output a command to make the user-level label named NAME
661 defined for reference from other files. */
663 /* Globalizing directive for a label. */
664 #define GLOBAL_ASM_OP ".globl "
666 /* The prefix to add to user-visible assembler symbols. */
668 #define USER_LABEL_PREFIX "_"
670 /* This is how to store into the string LABEL
671 the symbol_ref name of an internal numbered label where
672 PREFIX is the class of label and NUM is the number within the class.
673 This is suitable for output with `assemble_name'. */
675 #define ASM_GENERATE_INTERNAL_LABEL(LABEL,PREFIX,NUM) \
676 sprintf (LABEL, "*%s%ld", PREFIX, (long)(NUM))
678 /* This is how to output an insn to push a register on the stack.
679 It need not be very fast code. */
681 #define ASM_OUTPUT_REG_PUSH(FILE,REGNO) \
682 fprintf (FILE, "\tpushl %s\n", reg_names[REGNO])
684 /* This is how to output an insn to pop a register from the stack.
685 It need not be very fast code. */
687 #define ASM_OUTPUT_REG_POP(FILE,REGNO) \
688 fprintf (FILE, "\tmovl (%s)+,%s\n", reg_names[STACK_POINTER_REGNUM], \
691 /* This is how to output an element of a case-vector that is absolute.
692 (The VAX does not use such vectors,
693 but we must define this macro anyway.) */
695 #define ASM_OUTPUT_ADDR_VEC_ELT(FILE, VALUE) \
699 ASM_GENERATE_INTERNAL_LABEL (label, "L", (VALUE));\
700 fprintf (FILE, "\t.long "); \
701 assemble_name (FILE, label); \
702 fprintf (FILE, "\n"); \
706 /* This is how to output an element of a case-vector that is relative. */
708 #define ASM_OUTPUT_ADDR_DIFF_ELT(FILE, BODY, VALUE, REL) \
712 ASM_GENERATE_INTERNAL_LABEL (label, "L", (VALUE)); \
713 fprintf (FILE, "\t.word "); \
714 assemble_name (FILE, label); \
715 ASM_GENERATE_INTERNAL_LABEL (label, "L", (REL)); \
716 fprintf (FILE, "-"); \
717 assemble_name (FILE, label); \
718 fprintf (FILE, "\n"); \
722 /* This is how to output an assembler line
723 that says to advance the location counter
724 to a multiple of 2**LOG bytes. */
726 #define ASM_OUTPUT_ALIGN(FILE,LOG) \
727 fprintf (FILE, "\t.align %d\n", (LOG))
729 /* This is how to output an assembler line
730 that says to advance the location counter by SIZE bytes. */
732 #define ASM_OUTPUT_SKIP(FILE,SIZE) \
733 fprintf (FILE, "\t.space %u\n", (int)(SIZE))
735 /* This says how to output an assembler line
736 to define a global common symbol. */
738 #define ASM_OUTPUT_COMMON(FILE, NAME, SIZE, ROUNDED) \
739 ( fputs (".comm ", (FILE)), \
740 assemble_name ((FILE), (NAME)), \
741 fprintf ((FILE), ",%u\n", (int)(ROUNDED)))
743 /* This says how to output an assembler line
744 to define a local common symbol. */
746 #define ASM_OUTPUT_LOCAL(FILE, NAME, SIZE, ROUNDED) \
747 ( fputs (".lcomm ", (FILE)), \
748 assemble_name ((FILE), (NAME)), \
749 fprintf ((FILE), ",%u\n", (int)(ROUNDED)))
751 /* Print an instruction operand X on file FILE.
752 CODE is the code from the %-spec that requested printing this operand;
753 if `%z3' was used to print operand 3, then CODE is 'z'.
755 VAX operand formatting codes:
758 c direct branch condition
759 C reverse branch condition
760 D 64-bit immediate operand
761 B the low 8 bits of the complement of a constant operand
762 H the low 16 bits of the complement of a constant operand
763 M a mask for the N highest bits of a word
764 N the complement of a constant integer operand
765 P constant operand plus 1
766 R 32 - constant operand
767 b the low 8 bits of a negated constant operand
768 h the low 16 bits of a negated constant operand
769 # 'd' or 'g' depending on whether dfloat or gfloat is used
772 /* The purpose of D is to get around a quirk or bug in VAX assembler
773 whereby -1 in a 64-bit immediate operand means 0x00000000ffffffff,
774 which is not a 64-bit minus one. As a workaround, we output negative
776 #if HOST_BITS_PER_WIDE_INT == 64
777 # define NEG_HWI_PRINT_HEX16 HOST_WIDE_INT_PRINT_HEX
779 # define NEG_HWI_PRINT_HEX16 "0xffffffff%08lx"
782 #define PRINT_OPERAND_PUNCT_VALID_P(CODE) \
783 ((CODE) == '#' || (CODE) == '|')
785 #define PRINT_OPERAND(FILE, X, CODE) \
786 print_operand (FILE, X, CODE)
788 /* Print a memory operand whose address is X, on file FILE.
789 This uses a function in output-vax.c. */
791 #define PRINT_OPERAND_ADDRESS(FILE, ADDR) \
792 print_operand_address (FILE, ADDR)
794 /* This is a blatent lie. However, it's good enough, since we don't
795 actually have any code whatsoever for which this isn't overridden
796 by the proper FDE definition. */
797 #define INCOMING_RETURN_ADDR_RTX gen_rtx_REG (Pmode, PC_REGNUM)