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1.1 root 1: /* Definitions for AT&T assembler syntax for the Intel 80386.
2: Copyright (C) 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: /* Defines to be able to build libgcc.a with GCC. */
21:
22: /* It might seem that these are not important, since gcc 2 will never
23: call libgcc for these functions. But programs might be linked with
24: code compiled by gcc 1, and then these will be used. */
25:
26: /* The arg names used to be a and b, but `a' appears inside strings
27: and that confuses non-ANSI cpp. */
28:
29: #define perform_udivsi3(arg0,arg1) \
30: { \
31: register int dx asm("dx"); \
32: register int ax asm("ax"); \
33: \
34: dx = 0; \
35: ax = arg0; \
36: asm ("divl %3" : "=a" (ax), "=d" (dx) : "a" (ax), "g" (arg1), "d" (dx)); \
37: return ax; \
38: }
39:
40: #define perform_divsi3(arg0,arg1) \
41: { \
42: register int dx asm("dx"); \
43: register int ax asm("ax"); \
44: register int cx asm("cx"); \
45: \
46: ax = arg0; \
47: cx = arg1; \
48: asm ("cltd\n\tidivl %3" : "=a" (ax), "=&d" (dx) : "a" (ax), "c" (cx)); \
49: return ax; \
50: }
51:
52: #define perform_umodsi3(arg0,arg1) \
53: { \
54: register int dx asm("dx"); \
55: register int ax asm("ax"); \
56: \
57: dx = 0; \
58: ax = arg0; \
59: asm ("divl %3" : "=a" (ax), "=d" (dx) : "a" (ax), "g" (arg1), "d" (dx)); \
60: return dx; \
61: }
62:
63: #define perform_modsi3(arg0,arg1) \
64: { \
65: register int dx asm("dx"); \
66: register int ax asm("ax"); \
67: register int cx asm("cx"); \
68: \
69: ax = arg0; \
70: cx = arg1; \
71: asm ("cltd\n\tidivl %3" : "=a" (ax), "=&d" (dx) : "a" (ax), "c" (cx)); \
72: return dx; \
73: }
74:
75: #define perform_fixdfsi(arg0) \
76: { \
77: auto unsigned short ostatus; \
78: auto unsigned short nstatus; \
79: auto int ret; \
80: auto double tmp; \
81: \
82: &ostatus; /* guarantee these land in memory */ \
83: &nstatus; \
84: &ret; \
85: &tmp; \
86: \
87: asm volatile ("fnstcw %0" : "=m" (ostatus)); \
88: nstatus = ostatus | 0x0c00; \
89: asm volatile ("fldcw %0" : /* no outputs */ : "m" (nstatus)); \
90: tmp = arg0; \
91: asm volatile ("fldl %0" : /* no outputs */ : "m" (tmp)); \
92: asm volatile ("fistpl %0" : "=m" (ret)); \
93: asm volatile ("fldcw %0" : /* no outputs */ : "m" (ostatus)); \
94: \
95: return ret; \
96: }
97:
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