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/* $OpenBSD: s_floor.S,v 1.2 2005/08/02 11:17:31 espie Exp $ */
/*
* Written by J.T. Conklin <jtc@NetBSD.org>.
* Public domain.
*/
#include <machine/asm.h>
ENTRY(floor)
#ifdef __i386__
pushl %ebp
movl %esp,%ebp
subl $8,%esp
fstcw -4(%ebp) /* store fpu control word */
movw -4(%ebp),%dx
orw $0x0400,%dx /* round towards -oo */
andw $0xf7ff,%dx
movw %dx,-8(%ebp)
fldcw -8(%ebp) /* load modfied control word */
fldl 8(%ebp); /* round */
frndint
fldcw -4(%ebp) /* restore original control word */
leave
#else
movsd %xmm0, -8(%rsp)
fstcw -12(%rsp)
movw -12(%rsp),%dx
orw $0x0400,%dx
andw $0xf7ff,%dx
movw %dx,-16(%rsp)
fldcw -16(%rsp)
fldl -8(%rsp)
frndint
fldcw -12(%rsp)
fstpl -8(%rsp)
movsd -8(%rsp),%xmm0
#endif
ret
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