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/*
* Written by J.T. Conklin <jtc@netbsd.org>.
* Public domain.
*/
#include <machine/asm.h>
#include <libm-alias-double.h>
RCSID("$NetBSD: s_floor.S,v 1.4 1995/05/09 00:01:59 jtc Exp $")
ENTRY(__floor)
fldl 4(%esp)
subl $32,%esp
cfi_adjust_cfa_offset (32)
fnstenv 4(%esp) /* store fpu environment */
/* We use here %edx although only the low 1 bits are defined.
But none of the operations should care and they are faster
than the 16 bit operations. */
movl $0x400,%edx /* round towards -oo */
orl 4(%esp),%edx
andl $0xf7ff,%edx
movl %edx,(%esp)
fldcw (%esp) /* load modified control word */
frndint /* round */
fldenv 4(%esp) /* restore original environment */
addl $32,%esp
cfi_adjust_cfa_offset (-32)
ret
END (__floor)
libm_alias_double (__floor, floor)
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