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Diffstat (limited to 'gnu/usr.bin/cc/include/i386/perform.h')
-rw-r--r-- | gnu/usr.bin/cc/include/i386/perform.h | 97 |
1 files changed, 97 insertions, 0 deletions
diff --git a/gnu/usr.bin/cc/include/i386/perform.h b/gnu/usr.bin/cc/include/i386/perform.h new file mode 100644 index 0000000..4fdd7b3 --- /dev/null +++ b/gnu/usr.bin/cc/include/i386/perform.h @@ -0,0 +1,97 @@ +/* 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, 675 Mass Ave, Cambridge, MA 02139, 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; \ +} + |