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1.1 root 1: /* Definitions for Sequent Intel 386.
2: Copyright (C) 1988 Free Software Foundation, Inc.
3:
4: This file is part of GNU CC.
5:
6: GNU CC 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 2, or (at your option)
9: any later version.
10:
11: GNU CC 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 GNU CC; see the file COPYING. If not, write to
18: the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
19:
20: #include "i386.h"
21:
22: /* Use the BSD assembler syntax. */
23:
24: #include "bsd386.h"
25:
1.1.1.3 ! root 26: /* By default, don't use IEEE compatible arithmetic comparisons
! 27: because the assembler can't handle the fucom insn.
! 28: Return float values in the 387.
! 29: (TARGET_80387 | TARGET_FLOAT_RETURNS_IN_80387) */
1.1 root 30:
1.1.1.3 ! root 31: #undef TARGET_DEFAULT
! 32: #define TARGET_DEFAULT 0201
1.1 root 33:
34: /* Specify predefined symbols in preprocessor. */
35:
36: #define CPP_PREDEFINES "-Dunix -Di386 -Dsequent"
37:
38: /* Pass -Z and -ZO options to the linker. */
39:
40: #define LINK_SPEC "%{Z*}"
41:
42: /* Link with libg.a when debugging, for dbx's sake. */
43:
44: #define LIB_SPEC "%{g:-lg} %{!p:%{!pg:-lc}}%{p:-lc_p}%{pg:-lc_p} "
45:
46: /* We don't want to output SDB debugging information. */
47:
48: #undef SDB_DEBUGGING_INFO
49:
50: /* We want to output DBX debugging information. */
51:
52: #define DBX_DEBUGGING_INFO
53:
1.1.1.3 ! root 54: /* Sequent Symmetry has size_t defined as int in /usr/include/sys/types.h */
! 55: #define SIZE_TYPE "int"
! 56:
1.1 root 57: /* gcc order is ax, dx, cx, bx, si, di, bp, sp, st, st.
58: * dbx order is ax, dx, cx, st(0), st(1), bx, si, di, st(2), st(3),
59: * st(4), st(5), st(6), st(7), sp, bp */
60:
61: /* ??? The right thing would be to change the ordering of the
62: registers to correspond to the conventions of this system,
63: and get rid of DBX_REGISTER_NUMBER. */
64:
65: #undef DBX_REGISTER_NUMBER
66: #define DBX_REGISTER_NUMBER(n) \
67: ((n) < 3 ? (n) : (n) < 6 ? (n) + 2 \
68: : (n) == 6 ? 15 : (n) == 7 ? 14 : 3)
69:
70: /* Prevent anything from being allocated in the register pair cx/bx,
71: since that would confuse GDB. */
72:
73: #undef HARD_REGNO_MODE_OK
74: #define HARD_REGNO_MODE_OK(REGNO, MODE) \
75: (((REGNO) < 2 ? 1 \
76: : (REGNO) < 4 ? 1 \
77: : (REGNO) >= 8 ? (GET_MODE_CLASS (MODE) == MODE_FLOAT \
78: || GET_MODE_CLASS (MODE) == MODE_COMPLEX_FLOAT) \
79: : (MODE) != QImode) \
80: && ! (REGNO == 2 && GET_MODE_UNIT_SIZE (MODE) > 4))
81:
82: /* Output assembler code to FILE to increment profiler label # LABELNO
83: for profiling a function entry. */
84:
85: #undef FUNCTION_PROFILER
86: #define FUNCTION_PROFILER(FILE, LABELNO) \
1.1.1.3 ! root 87: fprintf (FILE, "\tmovl $.LP%d,%%eax\n\tcall mcount\n", (LABELNO));
1.1 root 88:
1.1.1.2 root 89: /* Assembler pseudo-op for shared data segment. */
1.1 root 90: #define SHARED_SECTION_ASM_OP ".shdata"
91:
92: /* A C statement or statements which output an assembler instruction
93: opcode to the stdio stream STREAM. The macro-operand PTR is a
94: variable of type `char *' which points to the opcode name in its
95: "internal" form--the form that is written in the machine description.
96:
97: The Sequent assembler (identified as "Balance 8000 Assembler
98: 07/17/85 3.90" by "as -v") does not understand the `movs[bwl]' string
99: move mnemonics - it uses `smov[bwl]' instead. Change "movs" into
100: "smov", carefully avoiding the sign-extend opcodes. */
101:
102: #define ASM_OUTPUT_OPCODE(STREAM, PTR) \
103: { \
104: if ((PTR)[0] == 'm' \
105: && (PTR)[1] == 'o' \
106: && (PTR)[2] == 'v' \
107: && (PTR)[3] == 's' \
108: && ((PTR)[4] == 'b' || (PTR)[4] == 'w' || (PTR)[4] == 'l') \
109: && ((PTR)[5] == ' ' || (PTR)[5] == '\t'|| (PTR)[5] == '\0')) \
110: { \
111: fprintf (STREAM, "smov"); \
112: (PTR) += 4; \
113: } \
114: }
1.1.1.3 ! root 115:
! 116: /* 10-Aug-92 pes Local labels are prefixed with ".L" */
! 117: #undef LPREFIX
! 118: #define LPREFIX ".L"
! 119:
! 120: #undef ASM_GENERATE_INTERNAL_LABEL
! 121: #define ASM_GENERATE_INTERNAL_LABEL(BUF,PREFIX,NUMBER)\
! 122: sprintf ((BUF), "*.%s%d", (PREFIX), (NUMBER))
! 123:
! 124: #undef ASM_OUTPUT_INTERNAL_LABEL
! 125: #define ASM_OUTPUT_INTERNAL_LABEL(FILE,PREFIX,NUM)\
! 126: fprintf (FILE, ".%s%d:\n", PREFIX, NUM)
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