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