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1.1 root 1: /* Definitions of target machine for GNU compiler. Sun 68000/68020 version.
2: Copyright (C) 1987, 1988, 1993 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: /* This comment is here to see if it will keep Sun's cpp from dying. */
21:
22: /* If you do not need to generate floating point code for the optional
23: Sun FPA board, you can safely comment out the SUPPORT_SUN_FPA define
24: to gain a little speed and code size. */
25:
26: #define SUPPORT_SUN_FPA
27:
28: #include "m68k/m68k.h"
29:
30: /* See m68k.h. 7 means 68020 with 68881. */
31:
32: #ifndef TARGET_DEFAULT
33: #define TARGET_DEFAULT 7
34: #endif
35:
36: /* Define __HAVE_FPA__ or __HAVE_68881__ in preprocessor,
37: according to the -m flags.
38: This will control the use of inline 68881 insns in certain macros.
39: Also inform the program which CPU this is for. */
40:
41: #if TARGET_DEFAULT & 02
42:
43: /* -m68881 is the default */
44: #define CPP_SPEC \
45: "%{!msoft-float:%{mfpa:-D__HAVE_FPA__ }%{!mfpa:-D__HAVE_68881__ }}\
46: %{m68000:-D__mc68010__}%{mc68000:-D__mc68010__}%{!mc68000:%{!m68000:-D__mc68020__}} \
47: %{!ansi:%{m68000:-Dmc68010}%{mc68000:-Dmc68010}%{!mc68000:%{!m68000:-Dmc68020}}}"
48:
49: #else
50:
51: /* -msoft-float is the default */
52: #define CPP_SPEC \
53: "%{m68881:-D__HAVE_68881__ }%{mfpa:-D__HAVE_FPA__ }\
54: %{m68000:-D__mc68010__}%{mc68000:-D__mc68010__}%{!mc68000:%{!m68000:-D__mc68020__}} \
55: %{!ansi:%{m68000:-Dmc68010}%{mc68000:-Dmc68010}%{!mc68000:%{!m68000:-Dmc68020}}}"
56:
57: #endif
58:
59: /* Prevent error on `-sun3' and `-target sun3' options. */
60:
61: #define CC1_SPEC "%{sun3:} %{target:}"
62:
63: #define PTRDIFF_TYPE "int"
64: #define SIZE_TYPE "int"
65:
66: /* We must override m68k.h. */
67: #undef WCHAR_TYPE
68: #undef WCHAR_TYPE_SIZE
69: #define WCHAR_TYPE "short unsigned int"
70: #define WCHAR_TYPE_SIZE 16
71:
72: /* These compiler options take an argument. We ignore -target for now. */
73:
74: #define WORD_SWITCH_TAKES_ARG(STR) \
75: (DEFAULT_WORD_SWITCH_TAKES_ARG (STR) \
76: || !strcmp (STR, "target") || !strcmp (STR, "assert"))
77:
78: /* -m68000 requires special flags to the assembler. */
79:
80: #define ASM_SPEC \
81: "%{m68000:-mc68010}%{mc68000:-mc68010}%{!mc68000:%{!m68000:-mc68020}} \
82: %{fpic:-k} %{fPIC:-k}"
83:
84: /* Names to predefine in the preprocessor for this target machine. */
85:
86: #define CPP_PREDEFINES "-Dmc68000 -Dsun -Dunix"
87:
88: /* STARTFILE_SPEC to include sun floating point initialization
89: This is necessary (tr: Sun does it) for both the m68881 and the fpa
90: routines.
91: Note that includes knowledge of the default specs for gcc, ie. no
92: args translates to the same effect as -m68881
93: I'm not sure what would happen below if people gave contradictory
94: arguments (eg. -msoft-float -mfpa) */
95:
96: #if TARGET_DEFAULT & 0100
97: /* -mfpa is the default */
98: #define STARTFILE_SPEC \
99: "%{pg:gcrt0.o%s}%{!pg:%{p:mcrt0.o%s}%{!p:crt0.o%s}} \
100: %{m68881:Mcrt1.o%s} \
101: %{msoft-float:Fcrt1.o%s} \
102: %{!m68881:%{!msoft-float:Wcrt1.o%s}}"
103: #else
104: #if TARGET_DEFAULT & 2
105: /* -m68881 is the default */
106: #define STARTFILE_SPEC \
107: "%{pg:gcrt0.o%s}%{!pg:%{p:mcrt0.o%s}%{!p:crt0.o%s}} \
108: %{mfpa:Wcrt1.o%s} \
109: %{msoft-float:Fcrt1.o%s} \
110: %{!mfpa:%{!msoft-float:Mcrt1.o%s}}"
111: #else
112: /* -msoft-float is the default */
113: #define STARTFILE_SPEC \
114: "%{pg:gcrt0.o%s}%{!pg:%{p:mcrt0.o%s}%{!p:crt0.o%s}} \
115: %{m68881:Mcrt1.o%s} \
116: %{mfpa:Wcrt1.o%s} \
117: %{!m68881:%{!mfpa:Fcrt1.o%s}}"
118: #endif
119: #endif
120:
121: /* Specify library to handle `-a' basic block profiling.
122: Control choice of libm.a (if user says -lm)
123: based on fp arith default and options. */
124:
125: #if TARGET_DEFAULT & 0100
126: /* -mfpa is the default */
127: #define LIB_SPEC "%{g:-lg} %{!p:%{!pg:-lc}}%{p:-lc_p}%{pg:-lc_p} \
128: %{a:/usr/lib/bb_link.o} %{g:-lg} \
129: %{msoft-float:-L/usr/lib/fsoft}%{m68881:-L/usr/lib/f68881}\
130: %{!msoft_float:%{!m68881:-L/usr/lib/ffpa}}"
131: #else
132: #if TARGET_DEFAULT & 2
133: /* -m68881 is the default */
134: #define LIB_SPEC "%{g:-lg} %{!p:%{!pg:-lc}}%{p:-lc_p}%{pg:-lc_p} \
135: %{a:/usr/lib/bb_link.o} %{g:-lg} \
136: %{msoft-float:-L/usr/lib/fsoft}%{!msoft-float:%{!mfpa:-L/usr/lib/f68881}}\
137: %{mfpa:-L/usr/lib/ffpa}"
138: #else
139: /* -msoft-float is the default */
140: #define LIB_SPEC "%{g:-lg} %{!p:%{!pg:-lc}}%{p:-lc_p}%{pg:-lc_p} \
141: %{a:/usr/lib/bb_link.o} %{g:-lg} \
142: %{!m68881:%{!mfpa:-L/usr/lib/fsoft}}%{m68881:-L/usr/lib/f68881}\
143: %{mfpa:-L/usr/lib/ffpa}"
144: #endif
145: #endif
146:
147: /* Provide required defaults for linker -e and -d switches. */
148:
149: #define LINK_SPEC \
150: "%{!nostdlib:%{!r*:%{!e*:-e start}}} -dc -dp %{static:-Bstatic} %{assert*}"
151:
152: /* Every structure or union's size must be a multiple of 2 bytes. */
153:
154: #define STRUCTURE_SIZE_BOUNDARY 16
155:
156: /* This is BSD, so it wants DBX format. */
157:
158: #define DBX_DEBUGGING_INFO
159:
160: /* Allow folding division by zero. */
161: #define REAL_INFINITY
162:
163: /* Generate calls to memcpy, memcmp and memset. */
164: #define TARGET_MEM_FUNCTIONS
165:
166: /* This is not a good idea. It prevents interoperation between
167: files compiled with -m68881 and those compiled with -msoft-float. */
168: #if 0
169: #define FUNCTION_VALUEX(MODE) \
170: gen_rtx (REG, (MODE), \
171: ((TARGET_68881 \
172: && ((MODE) == SFmode || (MODE) == DFmode || (MODE) == XFmode)) \
173: ? 16 : 0))
174:
175: #undef FUNCTION_VALUE
176: #define FUNCTION_VALUE(VALTYPE,FUNC) FUNCTION_VALUEX (TYPE_MODE (VALTYPE))
177: #endif /* 0 */
178:
179: /* This is how to output an assembler line defining a `double' constant. */
180:
181: #undef ASM_OUTPUT_DOUBLE
182: #define ASM_OUTPUT_DOUBLE(FILE,VALUE) \
183: { \
184: if (REAL_VALUE_ISINF (VALUE)) \
185: { \
186: if (REAL_VALUE_NEGATIVE (VALUE)) \
187: fprintf (FILE, "\t.double 0r-99e999\n"); \
188: else \
189: fprintf (FILE, "\t.double 0r99e999\n"); \
190: } \
191: else if (REAL_VALUE_ISNAN (VALUE)) \
192: { long l[2]; \
193: REAL_VALUE_TO_TARGET_DOUBLE ((VALUE), l); \
194: fprintf (FILE, "\t.long 0x%lx\n\t.long 0x%lx\n", l[0], l[1]); \
195: } \
196: else \
197: { char dstr[30]; \
198: REAL_VALUE_TO_DECIMAL ((VALUE), "%.17g", dstr); \
199: fprintf (FILE, "\t.double 0r%s\n", dstr); \
200: } \
201: }
202:
203: /* This is how to output an assembler line defining a `float' constant. */
204:
205: #undef ASM_OUTPUT_FLOAT
206: #define ASM_OUTPUT_FLOAT(FILE,VALUE) \
207: { \
208: if (REAL_VALUE_ISINF (VALUE)) \
209: { \
210: if (REAL_VALUE_NEGATIVE (VALUE)) \
211: fprintf (FILE, "\t.single 0r-99e999\n"); \
212: else \
213: fprintf (FILE, "\t.single 0r99e999\n"); \
214: } \
215: else if (REAL_VALUE_ISNAN (VALUE)) \
216: { long l; \
217: REAL_VALUE_TO_TARGET_SINGLE ((VALUE), l); \
218: fprintf (FILE, "\t.long 0x%lx\n", l); \
219: } \
220: else \
221: { char dstr[30]; \
222: REAL_VALUE_TO_DECIMAL ((VALUE), "%.9g", dstr); \
223: fprintf (FILE, "\t.single 0r%s\n", dstr); \
224: } \
225: }
226:
227: /* This is how to output an assembler lines defining floating operands.
228: There's no way to output a NaN's fraction, so we lose it. */
229:
230: #undef ASM_OUTPUT_FLOAT_OPERAND
231: #define ASM_OUTPUT_FLOAT_OPERAND(CODE,FILE,VALUE) \
232: do { \
233: if (CODE != 'f') \
234: { \
235: long l; \
236: REAL_VALUE_TO_TARGET_SINGLE (VALUE, l); \
237: if (sizeof (int) == sizeof (long)) \
238: asm_fprintf ((FILE), "%I0x%x", l); \
239: else \
240: asm_fprintf ((FILE), "%I0x%lx", l); \
241: } \
242: else if (REAL_VALUE_ISINF (VALUE)) \
243: { \
244: if (REAL_VALUE_NEGATIVE (VALUE)) \
245: asm_fprintf (FILE, "%I0r-99e999"); \
246: else \
247: asm_fprintf (FILE, "%I0r99e999"); \
248: } \
249: else if (REAL_VALUE_MINUS_ZERO (VALUE)) \
250: { \
251: asm_fprintf (FILE, "%I0r-0.0"); \
252: } \
253: else \
254: { char dstr[30]; \
255: REAL_VALUE_TO_DECIMAL ((VALUE), "%.9g", dstr); \
256: asm_fprintf (FILE, "%I0r%s", dstr); \
257: } \
258: } while (0)
259:
260: #undef ASM_OUTPUT_DOUBLE_OPERAND
261: #define ASM_OUTPUT_DOUBLE_OPERAND(FILE,VALUE) \
262: do { if (REAL_VALUE_ISINF (VALUE)) \
263: { \
264: if (REAL_VALUE_NEGATIVE (VALUE)) \
265: asm_fprintf (FILE, "%I0r-99e999"); \
266: else \
267: asm_fprintf (FILE, "%I0r99e999"); \
268: } \
269: else if (REAL_VALUE_MINUS_ZERO (VALUE)) \
270: { \
271: asm_fprintf (FILE, "%I0r-0.0"); \
272: } \
273: else \
274: { char dstr[30]; \
275: REAL_VALUE_TO_DECIMAL ((VALUE), "%.17g", dstr); \
276: asm_fprintf (FILE, "%I0r%s", dstr); \
277: } \
278: } while (0)
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