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