![[BACK]](/cvsweb/icons/back.gif){kind=icon}
Return to sysv4.h CVS log ![[TXT]](/cvsweb/icons/text.gif){kind=icon}
![[DIR]](/cvsweb/icons/dir.gif){kind=icon}
Up to [Apple XNU] / GNUtools / cc / config / i860|
Return to sysv4.h CVS log | Up to [Apple XNU] / GNUtools / cc / config / i860 |
1.1 root 1: /* Target definitions for GNU compiler for Intel 80860 running System V.4
2: Copyright (C) 1991 Free Software Foundation, Inc.
3:
4: Written by Ron Guilmette ([email protected]).
5:
6: This file is part of GNU CC.
7:
8: GNU CC is free software; you can redistribute it and/or modify
9: it under the terms of the GNU General Public License as published by
10: the Free Software Foundation; either version 2, or (at your option)
11: any later version.
12:
13: GNU CC is distributed in the hope that it will be useful,
14: but WITHOUT ANY WARRANTY; without even the implied warranty of
15: MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16: GNU General Public License for more details.
17:
18: You should have received a copy of the GNU General Public License
19: along with GNU CC; see the file COPYING. If not, write to
20: the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
21:
22: #include "i860/i860.h"
23: #include "svr4.h"
24:
25: #undef TARGET_VERSION
26: #define TARGET_VERSION fprintf (stderr, " (i860 System V Release 4)");
27:
28: /* Provide a set of pre-definitions and pre-assertions appropriate for
29: the i860 running svr4. Note that the symbol `__svr4__' MUST BE
30: DEFINED! It is needed so that the va_list struct in va-i860.h
31: will get correctly defined for the svr4 (ABI compliant) case rather
32: than for the previous (svr3, svr2, ...) case. It also needs to be
33: defined so that the correct (svr4) version of __builtin_saveregs
34: will be selected when we are building gnulib2.c.
35: __svr4__ is our extension. */
36:
37: #define CPP_PREDEFINES \
38: "-Di860 -Dunix -DSVR4 -D__svr4__ -Asystem(unix) -Asystem(svr4) -Acpu(i860) -Amachine(i860)"
39:
40: /* The prefix to be used in assembler output for all names of registers.
41: This string gets prepended to all i860 register names (svr4 only). */
42:
43: #define I860_REG_PREFIX "%"
44:
45: #define ASM_COMMENT_START "#"
46:
47: #undef TYPE_OPERAND_FMT
48: #define TYPE_OPERAND_FMT "\"%s\""
49:
50: #define DBX_REGISTER_NUMBER(REGNO) (REGNO)
51:
52: /* The following macro definition overrides the one in i860.h
53: because the svr4 i860 assembler requires a different syntax
54: for getting parts of constant/relocatable values. */
55:
56: #undef PRINT_OPERAND_PART
57: #define PRINT_OPERAND_PART(FILE, X, PART_CODE) \
58: do { fprintf (FILE, "["); \
59: output_address (X); \
60: fprintf (FILE, "]@%s", PART_CODE); \
61: } while (0)
62:
63: /* If the host and target formats match, output the floats as hex. */
64: #if HOST_FLOAT_FORMAT == TARGET_FLOAT_FORMAT
65: #if defined (HOST_WORDS_BIG_ENDIAN) == WORDS_BIG_ENDIAN
66:
67: /* This is how to output an assembler line defining a `double' constant.
68: Note that the native i860/svr4 ELF assembler can't properly handle
69: infinity. It generates an incorrect (non-infinity) value when given
70: `.double 99e9999' and it doesn't grok `inf' at all. It also mishandles
71: NaNs and -0.0. */
72:
73: #undef ASM_OUTPUT_DOUBLE
74: #define ASM_OUTPUT_DOUBLE(FILE,VALUE) \
75: { \
76: if (REAL_VALUE_ISINF (VALUE) \
77: || REAL_VALUE_ISNAN (VALUE) \
78: || REAL_VALUE_MINUS_ZERO (VALUE)) \
79: { \
80: long t[2]; \
81: REAL_VALUE_TO_TARGET_DOUBLE ((VALUE), t); \
82: fprintf (FILE, "\t.word 0x%lx\n\t.word 0x%lx\n", t[0], t[1]); \
83: } \
84: else \
85: fprintf (FILE, "\t.double %.20e\n", VALUE); \
86: }
87:
88: /* This is how to output an assembler line defining a `float' constant.
89: Note that the native i860/svr4 ELF assembler can't properly handle
90: infinity. It actually generates an assembly time error when given
91: `.float 99e9999' and it doesn't grok `inf' at all. It also mishandles
92: NaNs and -0.0. */
93:
94: #undef ASM_OUTPUT_FLOAT
95: #define ASM_OUTPUT_FLOAT(FILE,VALUE) \
96: { \
97: if (REAL_VALUE_ISINF (VALUE) \
98: || REAL_VALUE_ISNAN (VALUE) \
99: || REAL_VALUE_MINUS_ZERO (VALUE)) \
100: { \
101: long t; \
102: REAL_VALUE_TO_TARGET_SINGLE ((VALUE), t); \
103: fprintf (FILE, "\t.word 0x%lx\n", t); \
104: } \
105: else \
106: fprintf (FILE, "\t.float %.12e\n", VALUE); \
107: }
108:
109: #endif /* word order matches */
110: #endif /* HOST_FLOAT_FORMAT == TARGET_FLOAT_FORMAT */
111:
112: #undef ASM_FILE_START
113: #define ASM_FILE_START(FILE) \
114: do { output_file_directive (FILE, main_input_filename); \
115: fprintf (FILE, "\t.version\t\"01.01\"\n"); \
116: } while (0)
117:
118: /* Output the special word the svr4 SDB wants to see just before
119: the first word of each function's prologue code. */
120:
121: extern char *current_function_original_name;
122:
123: /* This special macro is used to output a magic word just before the
124: first word of each function. On some versions of UNIX running on
125: the i860, this word can be any word that looks like a NOP, however
126: under svr4, this neds to be an `shr r0,r0,r0' instruction in which
127: the normally unused low-order bits contain the length of the function
128: prologue code (in bytes). This is needed to make the svr4 SDB debugger
129: happy. */
130:
131: #undef ASM_OUTPUT_FUNCTION_PREFIX
132: #define ASM_OUTPUT_FUNCTION_PREFIX(FILE, FNNAME) \
133: do { ASM_OUTPUT_ALIGN (FILE, 2); \
134: fprintf ((FILE), "\t.long\t.ep."); \
135: assemble_name (FILE, FNNAME); \
136: fprintf (FILE, "-"); \
137: assemble_name (FILE, FNNAME); \
138: fprintf (FILE, "+0xc8000000\n"); \
139: current_function_original_name = (FNNAME); \
140: } while (0)
141:
142: /* Output the special label that must go just after each function's
143: prologue code to support svr4 SDB. */
144:
145: #define ASM_OUTPUT_PROLOGUE_SUFFIX(FILE) \
146: do { fprintf (FILE, ".ep."); \
147: assemble_name (FILE, current_function_original_name); \
148: fprintf (FILE, ":\n"); \
149: } while (0)
150:
151: #undef CTORS_SECTION_ASM_OP
152: #define CTORS_SECTION_ASM_OP ".section\t.ctors,\"a\",\"progbits\""
153: #undef DTORS_SECTION_ASM_OP
154: #define DTORS_SECTION_ASM_OP ".section\t.dtors,\"a\",\"progbits\""
155:
156: /* Add definitions to support the .tdesc section as specified in the svr4
157: ABI for the i860. */
158:
159: #define TDESC_SECTION_ASM_OP ".section\t.tdesc"
160:
161: #undef EXTRA_SECTIONS
162: #define EXTRA_SECTIONS in_const, in_ctors, in_dtors, in_tdesc
163:
164: #undef EXTRA_SECTION_FUNCTIONS
165: #define EXTRA_SECTION_FUNCTIONS \
166: CONST_SECTION_FUNCTION \
167: CTORS_SECTION_FUNCTION \
168: DTORS_SECTION_FUNCTION \
169: TDESC_SECTION_FUNCTION
170:
171: #define TDESC_SECTION_FUNCTION \
172: void \
173: tdesc_section () \
174: { \
175: if (in_section != in_tdesc) \
176: { \
177: fprintf (asm_out_file, "%s\n", TDESC_SECTION_ASM_OP); \
178: in_section = in_tdesc; \
179: } \
180: }
181:
182: #ifdef OUTPUT_TDESC
183: #undef ASM_FILE_END
184: #define ASM_FILE_END(FILE) \
185: do { \
186: if (current_function_original_name != NULL) { \
187: tdesc_section(); \
188: fprintf ((FILE), "%s __ETEXT\n", ASM_LONG); \
189: fprintf ((FILE), "%s 0\n", ASM_LONG); \
190: text_section(); \
191: fputs("__ETEXT:\n", (FILE)); \
192: } \
193: fprintf ((FILE), "\t.ident\t\"GCC: (GNU) %s\"\n", \
194: version_string); \
195: } while (0)
196: #endif
This archive runs on limited infrastructure. Preserving old code on modern bandwidth. Automated agents are requested to crawl responsibly.