OpenLibm/i387/s_floor.S

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/*
* Written by:
* J.T. Conklin (jtc@netbsd.org)
* Public domain.
*/
#include <i387/bsd_asm.h>
2011-12-15 07:16:26 +01:00
//__FBSDID("$FreeBSD: src/lib/msun/i387/s_floor.S,v 1.10 2011/01/07 16:13:12 kib Exp $")
ENTRY(floor)
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
ret
END(floor)