NetBSD/lib/libc/arch/i386/gen/flt_rounds.S

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ArmAsm
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/*
* Written by J.T. Conklin, Apr 4, 1995
* Public domain.
*/
#include <machine/asm.h>
.text
.align 2
_map:
.long 1 /* round to nearest */
.long 3 /* round to negative infinity */
.long 2 /* round to positive infinity */
.long 0 /* round to zero */
ENTRY(__flt_rounds)
subl $4,%esp
fnstcw 2(%esp)
movw 2(%esp),%ax
shrl $10,%eax
andl $3,%eax
movl _map(,%eax,4),%eax
addl $4,%esp
ret