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1.1 root 1: /* Target definitions for GNU compiler for Intel 80860 running System V.3
2: Copyright (C) 1991 Free Software Foundation, Inc.
3:
1.1.1.3 root 4: Written by Ron Guilmette ([email protected]).
1.1 root 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
1.1.1.4 ! root 20: the Free Software Foundation, 59 Temple Place - Suite 330,
! 21: Boston, MA 02111-1307, USA. */
1.1 root 22:
23: #include "i860/i860.h"
24: #include "svr3.h"
25:
26: #undef TARGET_VERSION
27: #define TARGET_VERSION fprintf (stderr, " (i860, System V Release 3)")
28:
29: /* Provide a set of pre-definitions and pre-assertions appropriate for
30: the i860 running svr3. */
1.1.1.2 root 31: #define CPP_PREDEFINES "-Di860 -Dunix -D__svr3__ -Asystem(unix) -Asystem(svr3) -Acpu(i860) -Amachine(i860)"
1.1 root 32:
33: /* Use crt1.o as a startup file and crtn.o as a closing file. */
34:
35: #define STARTFILE_SPEC \
36: "%{pg:gcrt1.o%s}%{!pg:%{p:mcrt1.o%s}%{!p:crt1.o%s}}"
37:
38: #define LIB_SPEC "%{p:-L/usr/lib/libp}%{pg:-L/usr/lib/libp} -lc crtn.o%s"
39:
40: /* Special flags for the linker. I don't know what they do. */
41:
42: #define LINK_SPEC "%{T*} %{z:-lm}"
43:
44: /* The prefix to be used in assembler output for all names of registers.
45: None is needed in V.3. */
46:
47: #define I860_REG_PREFIX ""
48:
49: /* Delimiter that starts comments in the assembler code. */
50:
51: #define ASM_COMMENT_START "//"
52:
53: /* Don't renumber the regusters for debugger output. */
54:
55: #define DBX_REGISTER_NUMBER(REGNO) (REGNO)
56:
57: /* Output the special word the System V SDB wants to see just before
58: the first word of each function's prologue code. */
59:
60: extern char *current_function_original_name;
61:
62: /* This special macro is used to output a magic word just before the
63: first word of each function. On some versions of UNIX running on
64: the i860, this word can be any word that looks like a NOP, however
65: under svr4, this neds to be an `shr r0,r0,r0' instruction in which
66: the normally unused low-order bits contain the length of the function
67: prologue code (in bytes). This is needed to make the System V SDB
68: debugger happy. */
69:
70: #undef ASM_OUTPUT_FUNCTION_PREFIX
71: #define ASM_OUTPUT_FUNCTION_PREFIX(FILE, FNNAME) \
72: do { ASM_OUTPUT_ALIGN (FILE, 2); \
73: fprintf ((FILE), "\t.long\t.ep."); \
74: assemble_name (FILE, FNNAME); \
75: fprintf (FILE, "-"); \
76: assemble_name (FILE, FNNAME); \
77: fprintf (FILE, "+0xc8000000\n"); \
78: current_function_original_name = (FNNAME); \
79: } while (0)
80:
81: /* Output the special label that must go just after each function's
82: prologue code to support svr4 SDB. */
83:
84: #define ASM_OUTPUT_PROLOGUE_SUFFIX(FILE) \
85: do { fprintf (FILE, ".ep."); \
86: assemble_name (FILE, current_function_original_name); \
87: fprintf (FILE, ":\n"); \
88: } while (0)
89:
90: /* This says how to output an assembler line
91: to define a local common symbol.
92: The difference from svr3.h is we don't limit align to 2. */
93:
94: #undef ASM_OUTPUT_LOCAL
95: #define ASM_OUTPUT_LOCAL(FILE, NAME, SIZE, ROUNDED) \
96: do { \
97: int align = exact_log2 (ROUNDED); \
98: data_section (); \
99: ASM_OUTPUT_ALIGN ((FILE), align == -1 ? 2 : align); \
100: ASM_OUTPUT_LABEL ((FILE), (NAME)); \
101: fprintf ((FILE), "\t.set .,.+%u\n", (ROUNDED)); \
102: } while (0)
103:
104: /* The routine used to output string literals.
105:
106: #define ASCII_DATA_ASM_OP ".byte"
107:
108: #define ASM_OUTPUT_ASCII(FILE, STR, LENGTH) \
109: do \
110: { \
111: register unsigned char *str = (unsigned char *) (STR); \
112: register unsigned char *limit = str + (LENGTH); \
113: register unsigned bytes_in_chunk = 0; \
114: for (; str < limit; str++) \
115: { \
116: register unsigned ch = *str; \
117: if (ch < 32 || ch == '\\' || ch == '"' || ch >= 127) \
118: { \
119: if (bytes_in_chunk > 0) \
120: { \
121: fprintf ((FILE), "\"\n"); \
122: bytes_in_chunk = 0; \
123: } \
124: fprintf ((FILE), "\t%s\t%d\n", ASM_BYTE_OP, ch); \
125: } \
126: else \
127: { \
128: if (bytes_in_chunk >= 60) \
129: { \
130: fprintf ((FILE), "\"\n"); \
131: bytes_in_chunk = 0; \
132: } \
133: if (bytes_in_chunk == 0) \
134: fprintf ((FILE), "\t%s\t\"", ASCII_DATA_ASM_OP); \
135: putc (ch, (FILE)); \
136: bytes_in_chunk++; \
137: } \
138: } \
139: if (bytes_in_chunk > 0) \
140: fprintf ((FILE), "\"\n"); \
141: } \
142: while (0)
143:
144:
145: #undef CTORS_SECTION_ASM_OP
146: #define CTORS_SECTION_ASM_OP ".section\t.ctors,\"x\""
147: #undef DTORS_SECTION_ASM_OP
148: #define DTORS_SECTION_ASM_OP ".section\t.dtors,\"x\""
149:
150: /* Add definitions to support the .tdesc section as specified in the svr4
151: ABI for the i860. */
152:
153: #define TDESC_SECTION_ASM_OP ".section\t.tdesc"
154:
155: #undef EXTRA_SECTIONS
156: #define EXTRA_SECTIONS in_const, in_ctors, in_dtors, in_tdesc
157:
158: #undef EXTRA_SECTION_FUNCTIONS
159: #define EXTRA_SECTION_FUNCTIONS \
160: CONST_SECTION_FUNCTION \
161: CTORS_SECTION_FUNCTION \
162: DTORS_SECTION_FUNCTION \
163: TDESC_SECTION_FUNCTION
164:
165: #define TDESC_SECTION_FUNCTION \
166: void \
167: tdesc_section () \
168: { \
169: if (in_section != in_tdesc) \
170: { \
171: fprintf (asm_out_file, "%s\n", TDESC_SECTION_ASM_OP); \
172: in_section = in_tdesc; \
173: } \
174: }
175:
176: /* Enable the `const' section that svr3.h defines how to use. */
177: #undef USE_CONST_SECTION
178: #define USE_CONST_SECTION 1
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