1/* 2 * Written by J.T. Conklin <jtc@NetBSD.org>. 3 * Public domain. 4 */ 5 6#include <machine/asm.h> 7 8RCSID("$NetBSD: s_floor.S,v 1.9 2011/06/18 21:24:51 joerg Exp $") 9 10ENTRY(floor) 11#ifdef __i386__ 12 pushl %ebp 13 movl %esp,%ebp 14 subl $8,%esp 15 16 fstcw -4(%ebp) /* store fpu control word */ 17 movw -4(%ebp),%dx 18 orw $0x0400,%dx /* round towards -oo */ 19 andw $0xf7ff,%dx 20 movw %dx,-8(%ebp) 21 fldcw -8(%ebp) /* load modfied control word */ 22 23 fldl 8(%ebp) /* round */ 24 frndint 25 26 fldcw -4(%ebp) /* restore original control word */ 27 28 leave 29#else 30 movsd %xmm0, -8(%rsp) 31 fstcw -12(%rsp) 32 movw -12(%rsp),%dx 33 orw $0x0400,%dx 34 andw $0xf7ff,%dx 35 movw %dx,-16(%rsp) 36 fldcw -16(%rsp) 37 fldl -8(%rsp) 38 frndint 39 fldcw -12(%rsp) 40 fstpl -8(%rsp) 41 movsd -8(%rsp),%xmm0 42#endif 43 ret 44