99 lines
3.0 KiB
C
99 lines
3.0 KiB
C
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/* Definitions for AT&T assembler syntax for the Intel 80386.
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Copyright (C) 1993 Free Software Foundation, Inc.
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This file is part of GNU CC.
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GNU CC is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2, or (at your option)
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any later version.
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GNU CC is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with GNU CC; see the file COPYING. If not, write to
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the Free Software Foundation, 59 Temple Place - Suite 330,
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Boston, MA 02111-1307, USA. */
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/* Defines to be able to build libgcc.a with GCC. */
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/* It might seem that these are not important, since gcc 2 will never
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call libgcc for these functions. But programs might be linked with
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code compiled by gcc 1, and then these will be used. */
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/* The arg names used to be a and b, but `a' appears inside strings
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and that confuses non-ANSI cpp. */
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#define perform_udivsi3(arg0,arg1) \
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{ \
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register int dx asm("dx"); \
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register int ax asm("ax"); \
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\
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dx = 0; \
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ax = arg0; \
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asm ("divl %3" : "=a" (ax), "=d" (dx) : "a" (ax), "g" (arg1), "d" (dx)); \
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return ax; \
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}
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#define perform_divsi3(arg0,arg1) \
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{ \
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register int dx asm("dx"); \
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register int ax asm("ax"); \
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register int cx asm("cx"); \
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\
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ax = arg0; \
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cx = arg1; \
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asm ("cltd\n\tidivl %3" : "=a" (ax), "=&d" (dx) : "a" (ax), "c" (cx)); \
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return ax; \
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}
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#define perform_umodsi3(arg0,arg1) \
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{ \
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register int dx asm("dx"); \
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register int ax asm("ax"); \
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\
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dx = 0; \
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ax = arg0; \
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asm ("divl %3" : "=a" (ax), "=d" (dx) : "a" (ax), "g" (arg1), "d" (dx)); \
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return dx; \
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}
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#define perform_modsi3(arg0,arg1) \
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{ \
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register int dx asm("dx"); \
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register int ax asm("ax"); \
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register int cx asm("cx"); \
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\
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ax = arg0; \
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cx = arg1; \
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asm ("cltd\n\tidivl %3" : "=a" (ax), "=&d" (dx) : "a" (ax), "c" (cx)); \
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return dx; \
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}
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#define perform_fixdfsi(arg0) \
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{ \
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auto unsigned short ostatus; \
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auto unsigned short nstatus; \
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auto int ret; \
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auto double tmp; \
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\
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&ostatus; /* guarantee these land in memory */ \
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&nstatus; \
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&ret; \
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&tmp; \
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\
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asm volatile ("fnstcw %0" : "=m" (ostatus)); \
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nstatus = ostatus | 0x0c00; \
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asm volatile ("fldcw %0" : /* no outputs */ : "m" (nstatus)); \
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tmp = arg0; \
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asm volatile ("fldl %0" : /* no outputs */ : "m" (tmp)); \
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asm volatile ("fistpl %0" : "=m" (ret)); \
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asm volatile ("fldcw %0" : /* no outputs */ : "m" (ostatus)); \
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\
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return ret; \
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}
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