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1.1 root 1: /* Definitions of target machine for GNU compiler. Altos 3068 68020 version.
2: Copyright (C) 1988, 1989, 1993 Free Software Foundation, Inc.
3:
4: Written by Jyrki Kuoppala <[email protected]>
5: Last modified: Mon Mar 6 22:47:58 1989
6:
7: This file is part of GNU CC.
8:
9: GNU CC is free software; you can redistribute it and/or modify
10: it under the terms of the GNU General Public License as published by
11: the Free Software Foundation; either version 2, or (at your option)
12: any later version.
13:
14: GNU CC is distributed in the hope that it will be useful,
15: but WITHOUT ANY WARRANTY; without even the implied warranty of
16: MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17: GNU General Public License for more details.
18:
19: You should have received a copy of the GNU General Public License
20: along with GNU CC; see the file COPYING. If not, write to
21: the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
22:
23:
24: #include "m68k/m68k.h"
25:
26: /* See m68k.h. 7 means 68020 with 68881. */
27: /* 5 is without 68881. Change to 7 if you have 68881 */
28:
29: #ifndef TARGET_DEFAULT
30: #define TARGET_DEFAULT 5
31:
32: /* Don't try using XFmode. */
33: #undef LONG_DOUBLE_TYPE_SIZE
34: #define LONG_DOUBLE_TYPE_SIZE 64
35: #endif
36:
37: /* Define __HAVE_68881__ in preprocessor,
38: according to the -m flags.
39: This will control the use of inline 68881 insns in certain macros.
40: Also inform the program which CPU this is for. */
41:
42: #if TARGET_DEFAULT & 02
43:
44: /* -m68881 is the default */
45: #define CPP_SPEC \
46: "%{!msoft-float:-D__HAVE_68881__ }\
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__ }\
54: %{!ansi:%{m68000:-Dmc68010}%{mc68000:-Dmc68010}%{!mc68000:%{!m68000:-Dmc68020}}}"
55:
56: #endif
57:
58: /* -m68000 requires special flags to the assembler. */
59:
60: #define ASM_SPEC \
61: "%{m68000:-mc68010}%{mc68000:-mc68010}%{!mc68000:%{!m68000:-mc68020}}"
62:
63: /* Names to predefine in the preprocessor for this target machine. */
64:
65: #define CPP_PREDEFINES "-Dmc68000 -DPORTAR -Dmc68k32 -Uvax -Dm68k -Dunix -Asystem(unix) -Acpu(m68k) -Amachine(m68k)"
66:
67: /* Every structure or union's size must be a multiple of 2 bytes. */
68:
69: #define STRUCTURE_SIZE_BOUNDARY 16
70:
71: /* Generate calls to memcpy, memcmp and memset. */
72: #define TARGET_MEM_FUNCTIONS
73:
74: /* We use gnu assembler, linker and gdb, so we want DBX format. */
75:
76: #define DBX_DEBUGGING_INFO
77:
78: /* Tell some conditionals we will use GAS. Is this really used? */
79:
80: #define USE_GAS
81:
82: /* This is how to output an assembler line defining a `double' constant. */
83:
84: #undef ASM_OUTPUT_DOUBLE
85: #define ASM_OUTPUT_DOUBLE(FILE,VALUE) \
86: do { char dstr[30]; \
87: REAL_VALUE_TO_DECIMAL (VALUE, "%.20e", dstr); \
88: fprintf (FILE, "\t.double 0r%s\n", dstr); \
89: } while (0)
90:
91: /* This is how to output an assembler line defining a `float' constant. */
92:
93: #undef ASM_OUTPUT_FLOAT
94: #define ASM_OUTPUT_FLOAT(FILE,VALUE) \
95: do { char dstr[30]; \
96: REAL_VALUE_TO_DECIMAL (VALUE, "%.20e", dstr); \
97: fprintf (FILE, "\t.single 0r%s\n", dstr); \
98: } while (0)
99:
100: #undef ASM_OUTPUT_FLOAT_OPERAND
101: #define ASM_OUTPUT_FLOAT_OPERAND(CODE,FILE,VALUE) \
102: do { \
103: if (CODE == 'f') \
104: { \
105: char dstr[30]; \
106: REAL_VALUE_TO_DECIMAL (VALUE, "%.9g", dstr); \
107: fprintf (FILE, "#0r%s", dstr); \
108: } \
109: else \
110: { \
111: long l; \
112: REAL_VALUE_TO_TARGET_SINGLE (VALUE, l); \
113: if (sizeof (int) == sizeof (long)) \
114: asm_fprintf ((FILE), "%I0x%x", l); \
115: else \
116: asm_fprintf ((FILE), "%I0x%lx", l); \
117: } \
118: } while (0)
119:
120: #undef ASM_OUTPUT_DOUBLE_OPERAND
121: #define ASM_OUTPUT_DOUBLE_OPERAND(FILE,VALUE) \
122: do { char dstr[30]; \
123: REAL_VALUE_TO_DECIMAL (VALUE, "%.20g", dstr); \
124: fprintf (FILE, "#0r%s", dstr); \
125: } while (0)
126:
127: /* Return pointer values in both d0 and a0. */
128:
129: #undef FUNCTION_EXTRA_EPILOGUE
130: #define FUNCTION_EXTRA_EPILOGUE(FILE, SIZE) \
131: { \
132: extern int current_function_returns_pointer; \
133: if ((current_function_returns_pointer) && \
134: ! find_equiv_reg (0, get_last_insn (), 0, 0, 0, 8, Pmode))\
135: fprintf (FILE, "\tmovel d0,a0\n"); \
136: }
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