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s_copysignf.S revision 1.4 
      1 /*
      2  * Written by J.T. Conklin <jtc (at) netbsd.org>.
      3  * Public domain.
      4  */
      5 
      6 #include <machine/asm.h>
      7 
      8 /*
      9  * XXXfvdl split this file.
     10  */
     11 
     12 RCSID("$NetBSD: s_copysignf.S,v 1.4 2001/06/19 00:26:30 fvdl Exp $")
     13 
     14 #ifdef __x86_64__
     15 .Lneg:
     16 	.long 0x7fffffff
     17 .Lpos:
     18 	.long 0x80000000
     19 #endif
     20 
     21 ENTRY(copysignf)
     22 #ifdef __i386__
     23 	movl	8(%esp),%edx
     24 	andl	$0x80000000,%edx
     25 	movl	4(%esp),%eax
     26 	andl	$0x7fffffff,%eax
     27 	orl	%edx,%eax
     28 	movl	%eax,4(%esp)
     29 	flds	4(%esp)
     30 #else
     31 #if 0
     32 	/*
     33 	 * XXXfvdl gas doesn't grok this.
     34 	 * but it's legal according to the p4 manual.
     35 	 */
     36 	movss    .Lpos(%rip),%xmm2
     37 	movss    .Lneg(%rip),%xmm3
     38 	pandq   %xmm2,%xmm1
     39 	pandq   %xmm3,%xmm0
     40 	porq    %xmm1,%xmm0
     41 #else
     42 	movss	%xmm0,-4(%rsp)
     43 	movss	%xmm1,-8(%rsp)
     44 	movl	-8(%rsp),%edx
     45 	andl	$0x80000000,%edx
     46 	movl	-4(%rsp),%eax
     47 	andl	$0x7fffffff,%eax
     48 	orl	%edx,%eax
     49 	movl	%eax,-4(%rsp)
     50 	movss	-4(%rsp),%xmm0
     51 #endif
     52 #endif
     53 	ret
     54