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- /* Definitions for Unix assembler syntax for the Intel 80386.
- Copyright (C) 1988 Free Software Foundation, Inc.
-
- This file is part of GNU CC.
-
- GNU CC is free software; you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 2, or (at your option)
- any later version.
-
- GNU CC is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU General Public License for more details.
-
- You should have received a copy of the GNU General Public License
- along with GNU CC; see the file COPYING. If not, write to
- the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
-
- /* This file defines the aspects of assembler syntax
- that are the same for all the i386 Unix systems
- (though they may differ in non-Unix systems). */
-
- /* Define some concatenation macros to concatenate an opcode
- and one, two or three operands. In other assembler syntaxes
- they may alter the order of ther operands. */
-
- /* Note that the other files fail to use these
- in some of the places where they should. */
-
- #ifdef __STDC__
- #define AS2(a,b,c) #a " " #b "," #c
- #define AS3(a,b,c,d) #a " " #b "," #c "," #d
- #define AS1(a,b) #a " " #b
- #else
- #define AS1(a,b) "a b"
- #define AS2(a,b,c) "a b,c"
- #define AS3(a,b,c,d) "a b,c,d"
- #endif
-
- /* Define macro used to output shift-double opcodes when the shift
- count is in %cl. Some assemblers require %cl as an argument;
- some don't. This macro controls what to do: by default, don't
- print %cl. */
- #define AS3_SHIFT_DOUBLE(a,b,c,d) AS2 (a,c,d)
-
- /* Output the size-letter for an opcode.
- CODE is the letter used in an operand spec (L, B, W, S or Q).
- CH is the corresponding lower case letter
- (except if CODE is `Q' then CH is `l', unless GAS_MNEMONICS). */
- #define PUT_OP_SIZE(CODE,CH,FILE) putc (CH,(FILE))
-
- /* Opcode suffix for fullword insn. */
- #define L_SIZE "l"
-
- /* Prefix for register names in this syntax. */
- #define RP "%"
-
- /* Prefix for immediate operands in this syntax. */
- #define IP "$"
-
- /* Indirect call instructions should use `*'. */
- #define USE_STAR 1
-
- /* Prefix for a memory-operand X. */
- #define PRINT_PTR(X, FILE)
-
- /* Delimiters that surround base reg and index reg. */
- #define ADDR_BEG(FILE) putc('(', (FILE))
- #define ADDR_END(FILE) putc(')', (FILE))
-
- /* Print an index register (whose rtx is IREG). */
- #define PRINT_IREG(FILE,IREG) \
- do \
- { fputs (",", (FILE)); PRINT_REG ((IREG), 0, (FILE)); } \
- while (0)
-
- /* Print an index scale factor SCALE. */
- #define PRINT_SCALE(FILE,SCALE) \
- if ((SCALE) != 1) fprintf ((FILE), ",%d", (SCALE))
-
- /* Print a base/index combination.
- BREG is the base reg rtx, IREG is the index reg rtx,
- and SCALE is the index scale factor (an integer). */
-
- #define PRINT_B_I_S(BREG,IREG,SCALE,FILE) \
- { ADDR_BEG (FILE); \
- if (BREG) PRINT_REG ((BREG), 0, (FILE)); \
- if ((IREG) != 0) \
- { PRINT_IREG ((FILE), (IREG)); \
- PRINT_SCALE ((FILE), (SCALE)); } \
- ADDR_END (FILE); }
-
- /* Define the syntax of pseudo-ops, labels and comments. */
-
- /* String containing the assembler's comment-starter. */
-
- #define ASM_COMMENT_START "/"
- #define COMMENT_BEGIN "/"
-
- /* Output to assembler file text saying following lines
- may contain character constants, extra white space, comments, etc. */
-
- #define ASM_APP_ON "/APP\n"
-
- /* Output to assembler file text saying following lines
- no longer contain unusual constructs. */
-
- #define ASM_APP_OFF "/NO_APP\n"
-
- /* Output before read-only data. */
-
- #define TEXT_SECTION_ASM_OP ".text"
-
- /* Output before writable (initialized) data. */
-
- #define DATA_SECTION_ASM_OP ".data"
-
- /* Output before writable (uninitialized) data. */
-
- #define BSS_SECTION_ASM_OP ".bss"
-
- /* This is how to output a command to make the user-level label named NAME
- defined for reference from other files. */
-
- #define ASM_GLOBALIZE_LABEL(FILE,NAME) \
- (fputs (".globl ", FILE), assemble_name (FILE, NAME), fputs ("\n", FILE))
-
- /* By default, target has a 80387, uses IEEE compatible arithmetic,
- and returns float values in the 387, ie,
- (TARGET_80387 | TARGET_IEEE_FP | TARGET_FLOAT_RETURNS_IN_80387) */
-
- #define TARGET_DEFAULT 0301
-
- /* Floating-point return values come in the FP register. */
-
- #define VALUE_REGNO(MODE) \
- (GET_MODE_CLASS (MODE) == MODE_FLOAT \
- && TARGET_FLOAT_RETURNS_IN_80387 ? FIRST_FLOAT_REG : 0)
-
- /* 1 if N is a possible register number for a function value. */
-
- #define FUNCTION_VALUE_REGNO_P(N) \
- ((N) == 0 || ((N)== FIRST_FLOAT_REG && TARGET_FLOAT_RETURNS_IN_80387))
-
-