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1.1 root 1: /* Definitions for Sequent Intel 386.
1.1.1.3 root 2: Copyright (C) 1988, 1994 Free Software Foundation, Inc.
1.1 root 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
1.1.1.4 ! root 18: the Free Software Foundation, 59 Temple Place - Suite 330,
! 19: Boston, MA 02111-1307, USA. */
1.1 root 20:
21: #include "i386/i386.h"
22:
23: /* Use the BSD assembler syntax. */
24:
25: #include "i386/bsd.h"
26:
27: /* By default, don't use IEEE compatible arithmetic comparisons
28: because the assembler can't handle the fucom insn.
29: Return float values in the 387.
30: (TARGET_80387 | TARGET_FLOAT_RETURNS_IN_80387) */
31:
32: #undef TARGET_DEFAULT
33: #define TARGET_DEFAULT 0201
34:
35: /* Specify predefined symbols in preprocessor. */
36:
1.1.1.2 root 37: #define CPP_PREDEFINES "-Dunix -Di386 -Dsequent -Asystem(unix) -Acpu(i386) -Amachine(i386)"
1.1 root 38:
39: /* Pass -Z and -ZO options to the linker. */
40:
41: #define LINK_SPEC "%{Z*}"
42:
43: #if 0 /* Dynix 3.1 is said to accept -L. */
44: /* Dynix V3.0.12 doesn't accept -L at all. */
45:
46: #define LINK_LIBGCC_SPECIAL
47: #endif
48:
49: /* Link with libg.a when debugging, for dbx's sake. */
50:
51: #define LIB_SPEC "%{g:-lg} %{!p:%{!pg:-lc}}%{p:-lc_p}%{pg:-lc_p} "
52:
53: /* We don't want to output SDB debugging information. */
54:
55: #undef SDB_DEBUGGING_INFO
56:
57: /* We want to output DBX debugging information. */
58:
59: #define DBX_DEBUGGING_INFO
60:
61: /* Sequent Symmetry has size_t defined as int in /usr/include/sys/types.h */
62: #define SIZE_TYPE "int"
63:
64: /* gcc order is ax, dx, cx, bx, si, di, bp, sp, st, st.
65: * dbx order is ax, dx, cx, st(0), st(1), bx, si, di, st(2), st(3),
66: * st(4), st(5), st(6), st(7), sp, bp */
67:
68: /* ??? The right thing would be to change the ordering of the
69: registers to correspond to the conventions of this system,
70: and get rid of DBX_REGISTER_NUMBER. */
71:
72: #undef DBX_REGISTER_NUMBER
73: #define DBX_REGISTER_NUMBER(n) \
74: ((n) < 3 ? (n) : (n) < 6 ? (n) + 2 \
75: : (n) == 6 ? 15 : (n) == 7 ? 14 : 3)
76:
77: /* [email protected] says these two definitions
78: fix trouble in dbx. */
79: #undef DBX_OUTPUT_LBRAC
80: #define DBX_OUTPUT_LBRAC(file,name) \
81: fprintf (asmfile, "%s %d,0,%d,", ASM_STABN_OP, N_LBRAC, depth); \
82: assemble_name (asmfile, buf); \
83: fprintf (asmfile, "\n");
84:
85: #undef DBX_OUTPUT_RBRAC
86: #define DBX_OUTPUT_RBRAC(file,name) \
87: fprintf (asmfile, "%s %d,0,%d,", ASM_STABN_OP, N_RBRAC, depth); \
88: assemble_name (asmfile, buf); \
89: fprintf (asmfile, "\n");
90:
91: /* Prevent anything from being allocated in the register pair cx/bx,
92: since that would confuse GDB. */
93:
94: #undef HARD_REGNO_MODE_OK
95: #define HARD_REGNO_MODE_OK(REGNO, MODE) \
96: (((REGNO) < 2 ? 1 \
97: : (REGNO) < 4 ? 1 \
98: : FP_REGNO_P (REGNO) ? (GET_MODE_CLASS (MODE) == MODE_FLOAT \
99: || GET_MODE_CLASS (MODE) == MODE_COMPLEX_FLOAT) \
100: : (MODE) != QImode) \
101: && ! (REGNO == 2 && GET_MODE_UNIT_SIZE (MODE) > 4))
102:
103: /* Output assembler code to FILE to increment profiler label # LABELNO
104: for profiling a function entry. */
105:
106: #undef FUNCTION_PROFILER
107: #define FUNCTION_PROFILER(FILE, LABELNO) \
108: fprintf (FILE, "\tmovl $.LP%d,%%eax\n\tcall mcount\n", (LABELNO));
109:
110: /* Assembler pseudo-op for shared data segment. */
111: #define SHARED_SECTION_ASM_OP ".shdata"
112:
113: /* A C statement or statements which output an assembler instruction
114: opcode to the stdio stream STREAM. The macro-operand PTR is a
115: variable of type `char *' which points to the opcode name in its
116: "internal" form--the form that is written in the machine description.
117:
118: The Sequent assembler (identified as "Balance 8000 Assembler
119: 07/17/85 3.90" by "as -v") does not understand the `movs[bwl]' string
120: move mnemonics - it uses `smov[bwl]' instead. Change "movs" into
121: "smov", carefully avoiding the sign-extend opcodes. */
122:
123: #define ASM_OUTPUT_OPCODE(STREAM, PTR) \
124: { \
125: if ((PTR)[0] == 'm' \
126: && (PTR)[1] == 'o' \
127: && (PTR)[2] == 'v' \
128: && (PTR)[3] == 's' \
129: && ((PTR)[4] == 'b' || (PTR)[4] == 'w' || (PTR)[4] == 'l') \
130: && ((PTR)[5] == ' ' || (PTR)[5] == '\t'|| (PTR)[5] == '\0')) \
131: { \
132: fprintf (STREAM, "smov"); \
133: (PTR) += 4; \
134: } \
135: }
136:
137: /* 10-Aug-92 pes Local labels are prefixed with ".L" */
138: #undef LPREFIX
139: #define LPREFIX ".L"
140:
141: #undef ASM_GENERATE_INTERNAL_LABEL
142: #define ASM_GENERATE_INTERNAL_LABEL(BUF,PREFIX,NUMBER)\
143: sprintf ((BUF), "*.%s%d", (PREFIX), (NUMBER))
144:
145: #undef ASM_OUTPUT_INTERNAL_LABEL
146: #define ASM_OUTPUT_INTERNAL_LABEL(FILE,PREFIX,NUM)\
147: fprintf (FILE, ".%s%d:\n", PREFIX, NUM)
1.1.1.3 root 148:
149: /* The native compiler passes the address of the returned structure in eax. */
150: #undef STRUCT_VALUE
151: #undef STRUCT_VALUE_INCOMING
152: #define STRUCT_VALUE_REGNUM 0
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