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1.1 root 1: /* Definitions for IBM PS2 running AIX/386.
2: From: Minh Tran-Le <[email protected]>
3: Copyright (C) 1988 Free Software Foundation, Inc.
4:
5: This file is part of GNU CC.
6:
7: GNU CC is free software; you can redistribute it and/or modify
8: it under the terms of the GNU General Public License as published by
9: the Free Software Foundation; either version 2, or (at your option)
10: any later version.
11:
12: GNU CC is distributed in the hope that it will be useful,
13: but WITHOUT ANY WARRANTY; without even the implied warranty of
14: MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15: GNU General Public License for more details.
16:
17: You should have received a copy of the GNU General Public License
18: along with GNU CC; see the file COPYING. If not, write to
19: the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
20:
21:
22: #include "i386.h"
23:
24: /* Get the generic definitions for system V.3. */
25:
26: #include "svr3.h"
27:
28: /* Use the ATT assembler syntax.
29: This overrides at least one macro (ASM_OUTPUT_LABELREF) from svr3.h. */
30:
31: #include "att386.h"
32:
33: /* By default, target has a 80387. */
34:
35: #define TARGET_DEFAULT 1
36:
37: /* Use crt1.o as a startup file and crtn.o as a closing file. */
38:
39: #define STARTFILE_SPEC \
40: "%{pg:gcrt1.o%s}%{!pg:%{p:mcrt1.o%s}%{!p:crt1.o%s}} crtbegin.o%s"
41:
42: #define LIB_SPEC "%{p:-L/usr/lib/libp}%{pg:-L/usr/lib/libp} -lc \
43: crtend.o%s crtn.o%s"
44:
45: /* Special flags for the linker. I don't know what they do. */
46:
47: #define LINK_SPEC "%{K} %{!K:-K} %{T*} %{z:-lm}"
48:
49: /* Specify predefined symbols in preprocessor. */
50:
51: #define CPP_PREDEFINES "-D_I386 -Di386 -DAIX -D_AIX"
52:
53: /* special flags for the aix assembler to generate the short form for all
54: qualifying forward reference */
55:
56: #define ASM_SPEC "-s2"
57:
58: #undef ASM_FILE_START
59: #define ASM_FILE_START(FILE) \
60: do { fprintf (FILE, "\t.file\t\"%s\"\n", dump_base_name); \
61: if (optimize) \
62: ASM_FILE_START_1 (FILE); \
63: else \
64: fprintf (FILE, "\t.noopt\n"); \
65: } while (0)
66:
67: /* This was suggested, but it shouldn't be right for DBX output. -- RMS
68: #define ASM_OUTPUT_SOURCE_FILENAME(FILE, NAME) */
69:
70: /* Writing `int' for a bitfield forces int alignment for the structure. */
71:
72: #define PCC_BITFIELD_TYPE_MATTERS 1
73:
74: #if 0
75: /* Don't write a `.optim' pseudo; this assembler
76: is said to have a bug when .optim is used. */
77:
78: #undef ASM_FILE_START_1
79: #define ASM_FILE_START_1(FILE) fprintf (FILE, "\t.noopt\n");
80: #endif
81:
82: /* Machines that use the AT&T assembler syntax
83: also return floating point values in an FP register. */
84: /* Define how to find the value returned by a function.
85: VALTYPE is the data type of the value (as a tree).
86: If the precise function being called is known, FUNC is its FUNCTION_DECL;
87: otherwise, FUNC is 0. */
88:
89: #define VALUE_REGNO(MODE) \
90: (((MODE)==SFmode || (MODE)==DFmode) ? FIRST_FLOAT_REG : 0)
91:
92: /* 1 if N is a possible register number for a function value. */
93:
94: #define FUNCTION_VALUE_REGNO_P(N) ((N) == 0 || (N)== FIRST_FLOAT_REG)
95:
96: /* Output assembler code to FILE to increment profiler label # LABELNO
97: for profiling a function entry. */
98:
99: #undef FUNCTION_PROFILER
100: #define FUNCTION_PROFILER(FILE, LABELNO) \
101: fprintf (FILE, "\tleal %sP%d,%%eax\n\tcall mcount\n", LPREFIX, (LABELNO));
102:
103: /* Note that using bss_section here caused errors
104: in building shared libraries on system V.3.
105: but AIX 1.2 does not have yet shareable libraries on PS2 */
106: #undef ASM_OUTPUT_LOCAL
107: #define ASM_OUTPUT_LOCAL(FILE, NAME, SIZE, ROUNDED) \
108: (bss_section (), \
109: ASM_OUTPUT_LABEL ((FILE), (NAME)), \
110: fprintf ((FILE), "\t.set .,.+%u\n", (ROUNDED)))
111:
1.1.1.2 ! root 112: /* Define a few machine-specific details of the implementation of
! 113: constructors. */
1.1 root 114:
115: #undef INIT_SECTION_ASM_OP
116: #define INIT_SECTION_ASM_OP ".section .init,\"x\""
117:
1.1.1.2 ! root 118: #define CTOR_LIST_BEGIN \
! 119: asm (INIT_SECTION_ASM_OP); \
! 120: asm ("pushl $0")
! 121: #define CTOR_LIST_END CTOR_LIST_BEGIN
1.1 root 122:
123: #define ASM_OUTPUT_CONSTRUCTOR(FILE,NAME) \
124: do { \
125: init_section (); \
126: fprintf (FILE, "\tpushl $"); \
127: assemble_name (FILE, NAME); \
128: fprintf (FILE, "\n"); \
129: } while (0)
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