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sortix--sortix/libm/arch/i387/s_copysignf.S
Jonas 'Sortie' Termansen 5980be9b3c Add Sortix Math Library.
This work is based in part on code from NetBSD libm, libc and kernel.

The library is partly public domain and partly BSD-style licensed.
2013-12-17 14:30:39 +01:00

37 lines
566 B
ArmAsm

/*
* Written by J.T. Conklin <jtc@NetBSD.org>.
* Public domain.
*/
#include <machine/asm.h>
/*
* XXXfvdl split this file.
*/
RCSID("$NetBSD: s_copysignf.S,v 1.7 2011/06/21 21:52:49 joerg Exp $")
#ifdef __x86_64__
.Lneg:
.long 0x7fffffff
.Lpos:
.long 0x80000000
#endif
ENTRY(copysignf)
#ifdef __i386__
movl 8(%esp),%edx
andl $0x80000000,%edx
movl 4(%esp),%eax
andl $0x7fffffff,%eax
orl %edx,%eax
movl %eax,4(%esp)
flds 4(%esp)
#else
movss .Lpos(%rip),%xmm2
movss .Lneg(%rip),%xmm3
pand %xmm2,%xmm1
pand %xmm3,%xmm0
por %xmm1,%xmm0
#endif
ret