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/* $OpenBSD: s_copysign.S,v 1.2 2005/08/02 11:17:31 espie Exp $ */
/*
* Written by J.T. Conklin <jtc@NetBSD.org>.
* Public domain.
*/
/*
* XXXfvdl might as well split this file.
*/
#include <machine/asm.h>
#ifdef __x86_64__
.Lpos:
.quad 0x8000000000000000
.Lneg:
.quad 0x7fffffffffffffff
#endif
ENTRY(copysign)
#ifdef __i386__
movl 16(%esp),%edx
andl $0x80000000,%edx
movl 8(%esp),%eax
andl $0x7fffffff,%eax
orl %edx,%eax
movl %eax,8(%esp)
fldl 4(%esp)
#else
#if 0
/*
* XXXfvdl gas doesn't grok this yet.
*/
movq .Lpos(%rip),%xmm2
movq .Lneg(%rip),%xmm3
pand %xmm2,%xmm1
pand %xmm3,%xmm0
por %xmm1,%xmm0
#else
movsd %xmm0,-8(%rsp)
movsd %xmm1,-16(%rsp)
movl -12(%rsp),%edx
andl $0x80000000,%edx
movl -4(%rsp),%eax
andl $0x7fffffff,%eax
orl %edx,%eax
movl %eax,-4(%rsp)
movsd -8(%rsp),%xmm0
#endif
#endif
ret
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