1 /* Definitions of target machine for GNU compiler. VAX version.
2 Copyright (C) 1987-2013 Free Software Foundation, Inc.
4 This file is part of GCC.
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)
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.
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/>. */
21 /* Target CPU builtins. */
22 #define TARGET_CPU_CPP_BUILTINS() \
25 builtin_define ("__vax__"); \
26 builtin_assert ("cpu=vax"); \
27 builtin_assert ("machine=vax"); \
30 builtin_define ("__GFLOAT"); \
31 builtin_define ("__GFLOAT__"); \
36 /* Use -J option for long branch support with Unix assembler. */
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. */
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}}"
50 /* Run-time compilation parameters selecting different hardware subsets. */
52 /* Nonzero if ELF. Redefined by vax/elf.h. */
55 /* Use BSD names for udiv and umod libgcc calls. */
56 #define TARGET_BSD_DIVMOD 1
58 /* Default target_flags if no switches specified. */
60 #ifndef TARGET_DEFAULT
61 #define TARGET_DEFAULT (MASK_UNIX_ASM)
65 /* Target machine storage layout */
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
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
76 /* Define this if most significant word of a multiword number is the lowest
78 /* This is not true on the VAX. */
79 #define WORDS_BIG_ENDIAN 0
81 /* Width of a word, in units (bytes). */
82 #define UNITS_PER_WORD 4
84 /* Allocation boundary (in *bits*) for storing arguments in argument list. */
85 #define PARM_BOUNDARY 32
87 /* Allocation boundary (in *bits*) for the code of a function. */
88 #define FUNCTION_BOUNDARY 16
90 /* Alignment of field after `int : 0' in a structure. */
91 #define EMPTY_FIELD_BOUNDARY (TARGET_VAXC_ALIGNMENT ? 8 : 32)
93 /* Every structure's size must be a multiple of this. */
94 #define STRUCTURE_SIZE_BOUNDARY 8
96 /* A bit-field declared as `int' forces `int' alignment for the struct. */
97 #define PCC_BITFIELD_TYPE_MATTERS (! TARGET_VAXC_ALIGNMENT)
99 /* No data type wants to be aligned rounder than this. */
100 #define BIGGEST_ALIGNMENT 32
102 /* No structure field wants to be aligned rounder than this. */
103 #define BIGGEST_FIELD_ALIGNMENT (TARGET_VAXC_ALIGNMENT ? 8 : 32)
105 /* Set this nonzero if move instructions will actually fail to work
106 when given unaligned data. */
107 #define STRICT_ALIGNMENT 0
109 /* Let's keep the stack somewhat aligned. */
110 #define STACK_BOUNDARY 32
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
116 /* Standard register usage. */
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
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}
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}
138 /* Return number of consecutive hard regs needed starting at reg REGNO
139 to hold something of mode MODE.
140 This is ordinarily the length in words of a value of mode MODE
141 but can be less for certain modes in special long registers.
142 On the VAX, all registers are one word long. */
143 #define HARD_REGNO_NREGS(REGNO, MODE) \
144 ((GET_MODE_SIZE (MODE) + UNITS_PER_WORD - 1) / UNITS_PER_WORD)
146 /* Value is 1 if hard register REGNO can hold a value of machine-mode MODE.
147 On the VAX, all registers can hold all modes. */
148 #define HARD_REGNO_MODE_OK(REGNO, MODE) 1
150 /* Value is 1 if it is a good idea to tie two pseudo registers
151 when one has mode MODE1 and one has mode MODE2.
152 If HARD_REGNO_MODE_OK could produce different values for MODE1 and MODE2,
153 for any hard reg, then this must be 0 for correct output. */
154 #define MODES_TIEABLE_P(MODE1, MODE2) 1
156 /* Specify the registers used for certain standard purposes.
157 The values of these macros are register numbers. */
159 /* VAX pc is overloaded on a register. */
160 #define PC_REGNUM VAX_PC_REGNUM
162 /* Register to use for pushing function arguments. */
163 #define STACK_POINTER_REGNUM VAX_SP_REGNUM
165 /* Base register for access to local variables of the function. */
166 #define FRAME_POINTER_REGNUM VAX_FP_REGNUM
168 /* Offset from the frame pointer register value to the top of stack. */
169 #define FRAME_POINTER_CFA_OFFSET(FNDECL) 0
171 /* Base register for access to arguments of the function. */
172 #define ARG_POINTER_REGNUM VAX_AP_REGNUM
174 /* Register in which static-chain is passed to a function. */
175 #define STATIC_CHAIN_REGNUM 0
177 /* Register in which address to store a structure value
178 is passed to a function. */
179 #define VAX_STRUCT_VALUE_REGNUM 1
181 /* Define the classes of registers for register constraints in the
182 machine description. Also define ranges of constants.
184 One of the classes must always be named ALL_REGS and include all hard regs.
185 If there is more than one class, another class must be named NO_REGS
186 and contain no registers.
188 The name GENERAL_REGS must be the name of a class (or an alias for
189 another name such as ALL_REGS). This is the class of registers
190 that is allowed by "g" or "r" in a register constraint.
191 Also, registers outside this class are allocated only when
192 instructions express preferences for them.
194 The classes must be numbered in nondecreasing order; that is,
195 a larger-numbered class must never be contained completely
196 in a smaller-numbered class.
198 For any two classes, it is very desirable that there be another
199 class that represents their union. */
201 /* The VAX has only one kind of registers, so NO_REGS and ALL_REGS
202 are the only classes. */
204 enum reg_class { NO_REGS, ALL_REGS, LIM_REG_CLASSES };
206 #define N_REG_CLASSES (int) LIM_REG_CLASSES
208 /* Since GENERAL_REGS is the same class as ALL_REGS,
209 don't give it a different class number; just make it an alias. */
211 #define GENERAL_REGS ALL_REGS
213 /* Give names of register classes as strings for dump file. */
215 #define REG_CLASS_NAMES \
216 { "NO_REGS", "ALL_REGS" }
218 /* Define which registers fit in which classes.
219 This is an initializer for a vector of HARD_REG_SET
220 of length N_REG_CLASSES. */
222 #define REG_CLASS_CONTENTS {{0}, {0xffff}}
224 /* The same information, inverted:
225 Return the class number of the smallest class containing
226 reg number REGNO. This could be a conditional expression
227 or could index an array. */
229 #define REGNO_REG_CLASS(REGNO) ALL_REGS
231 /* The class value for index registers, and the one for base regs. */
233 #define INDEX_REG_CLASS ALL_REGS
234 #define BASE_REG_CLASS ALL_REGS
237 /* Stack layout; function entry, exit and calling. */
239 /* Define this if pushing a word on the stack
240 makes the stack pointer a smaller address. */
241 #define STACK_GROWS_DOWNWARD
243 /* Define this to nonzero if the nominal address of the stack frame
244 is at the high-address end of the local variables;
245 that is, each additional local variable allocated
246 goes at a more negative offset in the frame. */
247 #define FRAME_GROWS_DOWNWARD 1
249 /* Offset within stack frame to start allocating local variables at.
250 If FRAME_GROWS_DOWNWARD, this is the offset to the END of the
251 first local allocated. Otherwise, it is the offset to the BEGINNING
252 of the first local allocated. */
253 #define STARTING_FRAME_OFFSET 0
255 /* Given an rtx for the address of a frame,
256 return an rtx for the address of the word in the frame
257 that holds the dynamic chain--the previous frame's address. */
258 #define DYNAMIC_CHAIN_ADDRESS(FRAME) plus_constant (Pmode, (FRAME), 12)
260 /* If we generate an insn to push BYTES bytes,
261 this says how many the stack pointer really advances by.
262 On the VAX, -(sp) pushes only the bytes of the operands. */
263 #define PUSH_ROUNDING(BYTES) (BYTES)
265 /* Offset of first parameter from the argument pointer register value. */
266 #define FIRST_PARM_OFFSET(FNDECL) 4
268 /* Define how to find the value returned by a function.
269 VALTYPE is the data type of the value (as a tree).
270 If the precise function being called is known, FUNC is its FUNCTION_DECL;
271 otherwise, FUNC is 0. */
273 /* On the VAX the return value is in R0 regardless. */
275 #define FUNCTION_VALUE(VALTYPE, FUNC) \
276 gen_rtx_REG (TYPE_MODE (VALTYPE), 0)
278 /* Define how to find the value returned by a library function
279 assuming the value has mode MODE. */
281 /* On the VAX the return value is in R0 regardless. */
283 #define LIBCALL_VALUE(MODE) gen_rtx_REG (MODE, 0)
285 /* Define this if PCC uses the nonreentrant convention for returning
286 structure and union values. */
288 #define PCC_STATIC_STRUCT_RETURN
290 /* 1 if N is a possible register number for a function value.
291 On the VAX, R0 is the only register thus used. */
293 #define FUNCTION_VALUE_REGNO_P(N) ((N) == 0)
295 /* 1 if N is a possible register number for function argument passing.
296 On the VAX, no registers are used in this way. */
298 #define FUNCTION_ARG_REGNO_P(N) 0
300 /* Define a data type for recording info about an argument list
301 during the scan of that argument list. This data type should
302 hold all necessary information about the function itself
303 and about the args processed so far, enough to enable macros
304 such as FUNCTION_ARG to determine where the next arg should go.
306 On the VAX, this is a single integer, which is a number of bytes
307 of arguments scanned so far. */
309 #define CUMULATIVE_ARGS int
311 /* Initialize a variable CUM of type CUMULATIVE_ARGS
312 for a call to a function whose data type is FNTYPE.
313 For a library call, FNTYPE is 0.
315 On the VAX, the offset starts at 0. */
317 #define INIT_CUMULATIVE_ARGS(CUM, FNTYPE, LIBNAME, INDIRECT, N_NAMED_ARGS) \
320 /* Output assembler code to FILE to increment profiler label # LABELNO
321 for profiling a function entry. */
323 #define VAX_FUNCTION_PROFILER_NAME "mcount"
324 #define FUNCTION_PROFILER(FILE, LABELNO) \
328 ASM_GENERATE_INTERNAL_LABEL (label, "LP", (LABELNO)); \
329 fprintf (FILE, "\tmovab "); \
330 assemble_name (FILE, label); \
331 asm_fprintf (FILE, ",%Rr0\n\tjsb %s\n", \
332 VAX_FUNCTION_PROFILER_NAME); \
336 /* EXIT_IGNORE_STACK should be nonzero if, when returning from a function,
337 the stack pointer does not matter. The value is tested only in
338 functions that have frame pointers.
339 No definition is equivalent to always zero. */
341 #define EXIT_IGNORE_STACK 1
343 /* Store in the variable DEPTH the initial difference between the
344 frame pointer reg contents and the stack pointer reg contents,
345 as of the start of the function body. This depends on the layout
346 of the fixed parts of the stack frame and on how registers are saved.
348 On the VAX, FRAME_POINTER_REQUIRED is always 1, so the definition of this
349 macro doesn't matter. But it must be defined. */
351 #define INITIAL_FRAME_POINTER_OFFSET(DEPTH) (DEPTH) = 0;
353 /* Length in units of the trampoline for entering a nested function. */
355 #define TRAMPOLINE_SIZE 15
357 /* Byte offset of return address in a stack frame. The "saved PC" field
358 is in element [4] when treating the frame as an array of longwords. */
360 #define RETURN_ADDRESS_OFFSET (4 * UNITS_PER_WORD) /* 16 */
362 /* A C expression whose value is RTL representing the value of the return
363 address for the frame COUNT steps up from the current frame.
364 FRAMEADDR is already the frame pointer of the COUNT frame, so we
367 #define RETURN_ADDR_RTX(COUNT, FRAME) \
369 ? gen_rtx_MEM (Pmode, plus_constant (Pmode, FRAME, \
370 RETURN_ADDRESS_OFFSET)) \
374 /* Addressing modes, and classification of registers for them. */
376 #define HAVE_POST_INCREMENT 1
378 #define HAVE_PRE_DECREMENT 1
380 /* Macros to check register numbers against specific register classes. */
382 /* These assume that REGNO is a hard or pseudo reg number.
383 They give nonzero only if REGNO is a hard reg of the suitable class
384 or a pseudo reg currently allocated to a suitable hard reg.
385 Since they use reg_renumber, they are safe only once reg_renumber
386 has been allocated, which happens in reginfo.c during register
389 #define REGNO_OK_FOR_INDEX_P(regno) \
390 ((regno) < FIRST_PSEUDO_REGISTER || reg_renumber[regno] >= 0)
391 #define REGNO_OK_FOR_BASE_P(regno) \
392 ((regno) < FIRST_PSEUDO_REGISTER || reg_renumber[regno] >= 0)
394 /* Maximum number of registers that can appear in a valid memory address. */
396 #define MAX_REGS_PER_ADDRESS 2
398 /* 1 if X is an rtx for a constant that is a valid address. */
400 #define CONSTANT_ADDRESS_P(X) legitimate_constant_address_p (X)
402 /* The macros REG_OK_FOR..._P assume that the arg is a REG rtx
403 and check its validity for a certain class.
404 We have two alternate definitions for each of them.
405 The usual definition accepts all pseudo regs; the other rejects
406 them unless they have been allocated suitable hard regs.
407 The symbol REG_OK_STRICT causes the latter definition to be used.
409 Most source files want to accept pseudo regs in the hope that
410 they will get allocated to the class that the insn wants them to be in.
411 Source files for reload pass need to be strict.
412 After reload, it makes no difference, since pseudo regs have
413 been eliminated by then. */
415 #ifndef REG_OK_STRICT
417 /* Nonzero if X is a hard reg that can be used as an index
418 or if it is a pseudo reg. */
419 #define REG_OK_FOR_INDEX_P(X) 1
421 /* Nonzero if X is a hard reg that can be used as a base reg
422 or if it is a pseudo reg. */
423 #define REG_OK_FOR_BASE_P(X) 1
427 /* Nonzero if X is a hard reg that can be used as an index. */
428 #define REG_OK_FOR_INDEX_P(X) REGNO_OK_FOR_INDEX_P (REGNO (X))
430 /* Nonzero if X is a hard reg that can be used as a base reg. */
431 #define REG_OK_FOR_BASE_P(X) REGNO_OK_FOR_BASE_P (REGNO (X))
435 /* Specify the machine mode that this machine uses
436 for the index in the tablejump instruction. */
437 #define CASE_VECTOR_MODE HImode
439 /* Define as C expression which evaluates to nonzero if the tablejump
440 instruction expects the table to contain offsets from the address of the
442 Do not define this if the table should contain absolute addresses. */
443 #define CASE_VECTOR_PC_RELATIVE 1
445 /* Indicate that jump tables go in the text section. This is
446 necessary when compiling PIC code. */
447 #define JUMP_TABLES_IN_TEXT_SECTION 1
449 /* Define this as 1 if `char' should by default be signed; else as 0. */
450 #define DEFAULT_SIGNED_CHAR 1
452 /* Max number of bytes we can move from memory to memory
453 in one reasonably fast instruction. */
456 /* If a memory-to-memory move would take MOVE_RATIO or more simple
457 move-instruction pairs, we will do a movmem or libcall instead. */
458 #define MOVE_RATIO(speed) ((speed) ? 6 : 3)
459 #define CLEAR_RATIO(speed) ((speed) ? 6 : 2)
461 /* Nonzero if access to memory by bytes is slow and undesirable. */
462 #define SLOW_BYTE_ACCESS 0
464 /* Define if shifts truncate the shift count
465 which implies one can omit a sign-extension or zero-extension
467 /* #define SHIFT_COUNT_TRUNCATED */
469 /* Value is 1 if truncating an integer of INPREC bits to OUTPREC bits
470 is done just by pretending it is already truncated. */
471 #define TRULY_NOOP_TRUNCATION(OUTPREC, INPREC) 1
473 /* Specify the machine mode that pointers have.
474 After generation of rtl, the compiler makes no further distinction
475 between pointers and any other objects of this machine mode. */
478 /* A function address in a call instruction
479 is a byte address (for indexing purposes)
480 so give the MEM rtx a byte's mode. */
481 #define FUNCTION_MODE QImode
483 /* Specify the cost of a branch insn; roughly the number of extra insns that
484 should be added to avoid a branch.
486 Branches are extremely cheap on the VAX while the shift insns often
487 used to replace branches can be expensive. */
489 #define BRANCH_COST(speed_p, predictable_p) 0
491 /* Tell final.c how to eliminate redundant test instructions. */
493 /* Here we define machine-dependent flags and fields in cc_status
494 (see `conditions.h'). No extra ones are needed for the VAX. */
496 /* Store in cc_status the expressions
497 that the condition codes will describe
498 after execution of an instruction whose pattern is EXP.
499 Do not alter them if the instruction would not alter the cc's. */
501 #define NOTICE_UPDATE_CC(EXP, INSN) \
502 vax_notice_update_cc ((EXP), (INSN))
504 #define OUTPUT_JUMP(NORMAL, FLOAT, NO_OV) \
505 { if (cc_status.flags & CC_NO_OVERFLOW) \
510 /* Control the assembler format that we output. */
512 /* A C string constant describing how to begin a comment in the target
513 assembler language. The compiler assumes that the comment will end at
514 the end of the line. */
516 #define ASM_COMMENT_START "#"
518 /* Output to assembler file text saying following lines
519 may contain character constants, extra white space, comments, etc. */
521 #define ASM_APP_ON "#APP\n"
523 /* Output to assembler file text saying following lines
524 no longer contain unusual constructs. */
526 #define ASM_APP_OFF "#NO_APP\n"
528 /* Output before read-only data. */
530 #define TEXT_SECTION_ASM_OP "\t.text"
532 /* Output before writable data. */
534 #define DATA_SECTION_ASM_OP "\t.data"
536 /* How to refer to registers in assembler output.
537 This sequence is indexed by compiler's hard-register-number (see above).
538 The register names will be prefixed by REGISTER_PREFIX, if any. */
540 #define REGISTER_PREFIX ""
541 #define REGISTER_NAMES \
542 { "r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7", \
543 "r8", "r9", "r10", "r11", "ap", "fp", "sp", "pc", }
545 /* This is BSD, so it wants DBX format. */
547 #define DBX_DEBUGGING_INFO 1
549 /* Do not break .stabs pseudos into continuations. */
551 #define DBX_CONTIN_LENGTH 0
553 /* This is the char to use for continuation (in case we need to turn
554 continuation back on). */
556 #define DBX_CONTIN_CHAR '?'
558 /* Don't use the `xsfoo;' construct in DBX output; this system
559 doesn't support it. */
563 /* Output the .stabs for a C `static' variable in the data section. */
564 #define DBX_STATIC_STAB_DATA_SECTION
566 /* VAX specific: which type character is used for type double? */
568 #define ASM_DOUBLE_CHAR (TARGET_G_FLOAT ? 'g' : 'd')
570 /* This is how to output a command to make the user-level label named NAME
571 defined for reference from other files. */
573 /* Globalizing directive for a label. */
574 #define GLOBAL_ASM_OP ".globl "
576 /* The prefix to add to user-visible assembler symbols. */
578 #define USER_LABEL_PREFIX "_"
580 /* This is how to store into the string LABEL
581 the symbol_ref name of an internal numbered label where
582 PREFIX is the class of label and NUM is the number within the class.
583 This is suitable for output with `assemble_name'. */
585 #define ASM_GENERATE_INTERNAL_LABEL(LABEL,PREFIX,NUM) \
586 sprintf (LABEL, "*%s%ld", PREFIX, (long)(NUM))
588 /* This is how to output an insn to push a register on the stack.
589 It need not be very fast code. */
591 #define ASM_OUTPUT_REG_PUSH(FILE,REGNO) \
592 fprintf (FILE, "\tpushl %s\n", reg_names[REGNO])
594 /* This is how to output an insn to pop a register from the stack.
595 It need not be very fast code. */
597 #define ASM_OUTPUT_REG_POP(FILE,REGNO) \
598 fprintf (FILE, "\tmovl (%s)+,%s\n", reg_names[STACK_POINTER_REGNUM], \
601 /* This is how to output an element of a case-vector that is absolute.
602 (The VAX does not use such vectors,
603 but we must define this macro anyway.) */
605 #define ASM_OUTPUT_ADDR_VEC_ELT(FILE, VALUE) \
609 ASM_GENERATE_INTERNAL_LABEL (label, "L", (VALUE));\
610 fprintf (FILE, "\t.long "); \
611 assemble_name (FILE, label); \
612 fprintf (FILE, "\n"); \
616 /* This is how to output an element of a case-vector that is relative. */
618 #define ASM_OUTPUT_ADDR_DIFF_ELT(FILE, BODY, VALUE, REL) \
622 ASM_GENERATE_INTERNAL_LABEL (label, "L", (VALUE)); \
623 fprintf (FILE, "\t.word "); \
624 assemble_name (FILE, label); \
625 ASM_GENERATE_INTERNAL_LABEL (label, "L", (REL)); \
626 fprintf (FILE, "-"); \
627 assemble_name (FILE, label); \
628 fprintf (FILE, "\n"); \
632 /* This is how to output an assembler line
633 that says to advance the location counter
634 to a multiple of 2**LOG bytes. */
636 #define ASM_OUTPUT_ALIGN(FILE,LOG) \
637 fprintf (FILE, "\t.align %d\n", (LOG))
639 /* This is how to output an assembler line
640 that says to advance the location counter by SIZE bytes. */
642 #define ASM_OUTPUT_SKIP(FILE,SIZE) \
643 fprintf (FILE, "\t.space %u\n", (int)(SIZE))
645 /* This says how to output an assembler line
646 to define a global common symbol. */
648 #define ASM_OUTPUT_COMMON(FILE, NAME, SIZE, ROUNDED) \
649 ( fputs (".comm ", (FILE)), \
650 assemble_name ((FILE), (NAME)), \
651 fprintf ((FILE), ",%u\n", (int)(ROUNDED)))
653 /* This says how to output an assembler line
654 to define a local common symbol. */
656 #define ASM_OUTPUT_LOCAL(FILE, NAME, SIZE, ROUNDED) \
657 ( fputs (".lcomm ", (FILE)), \
658 assemble_name ((FILE), (NAME)), \
659 fprintf ((FILE), ",%u\n", (int)(ROUNDED)))
661 /* Print an instruction operand X on file FILE.
662 CODE is the code from the %-spec that requested printing this operand;
663 if `%z3' was used to print operand 3, then CODE is 'z'.
665 VAX operand formatting codes:
668 c direct branch condition
669 C reverse branch condition
670 D 64-bit immediate operand
671 B the low 8 bits of the complement of a constant operand
672 H the low 16 bits of the complement of a constant operand
673 M a mask for the N highest bits of a word
674 N the complement of a constant integer operand
675 P constant operand plus 1
676 R 32 - constant operand
677 b the low 8 bits of a negated constant operand
678 h the low 16 bits of a negated constant operand
679 # 'd' or 'g' depending on whether dfloat or gfloat is used
682 /* The purpose of D is to get around a quirk or bug in VAX assembler
683 whereby -1 in a 64-bit immediate operand means 0x00000000ffffffff,
684 which is not a 64-bit minus one. As a workaround, we output negative
686 #if HOST_BITS_PER_WIDE_INT == 64
687 # define NEG_HWI_PRINT_HEX16 HOST_WIDE_INT_PRINT_HEX
689 # define NEG_HWI_PRINT_HEX16 "0xffffffff%08lx"
692 #define PRINT_OPERAND_PUNCT_VALID_P(CODE) \
693 ((CODE) == '#' || (CODE) == '|')
695 #define PRINT_OPERAND(FILE, X, CODE) \
696 print_operand (FILE, X, CODE)
698 /* Print a memory operand whose address is X, on file FILE.
699 This uses a function in output-vax.c. */
701 #define PRINT_OPERAND_ADDRESS(FILE, ADDR) \
702 print_operand_address (FILE, ADDR)
704 /* This is a blatent lie. However, it's good enough, since we don't
705 actually have any code whatsoever for which this isn't overridden
706 by the proper FDE definition. */
707 #define INCOMING_RETURN_ADDR_RTX gen_rtx_REG (Pmode, PC_REGNUM)