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NetBSD/lib/libm/arch/i387/s_ilogb.S

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ArmAsm
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i387 specific ilogb()
1994-02-18 05:50:11 +03:00
/*
Winning Strategies has placed this code into the Public Domain
1995-04-29 02:43:31 +04:00
* Written by J.T. Conklin <jtc@netbsd.org>.
* Public domain.
i387 specific ilogb()
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*/
#include <machine/asm.h>
Modify the i387 code so that it can be shared between the i386 port and the x86_64 port. XXX some files should be distinct.
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RCSID("$NetBSD: s_ilogb.S,v 1.6 2001/06/19 00:26:30 fvdl Exp $")
Added RCS ID's. ID's use new RCSID macro from <machine/asm.h>.
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i387 specific ilogb()
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ENTRY(ilogb)
Modify the i387 code so that it can be shared between the i386 port and the x86_64 port. XXX some files should be distinct.
2001-06-19 04:26:29 +04:00
#ifdef __i386__
Fix from Jochen Pohl, i387 version of ilogb didn't set up the stack frame correctly (PR #1590).
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pushl %ebp
i387 specific ilogb()
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movl %esp,%ebp
subl $4,%esp
fldl 8(%ebp)
fxtract
Modify the i387 code so that it can be shared between the i386 port and the x86_64 port. XXX some files should be distinct.
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fstp %st
i387 specific ilogb()
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fistpl -4(%ebp)
movl -4(%ebp),%eax
leave
Modify the i387 code so that it can be shared between the i386 port and the x86_64 port. XXX some files should be distinct.
2001-06-19 04:26:29 +04:00
#else
movsd %xmm0,-8(%rsp)
fldl -8(%rsp)
fxtract
fstp %st
fistpl -8(%rsp)
movl -8(%rsp),%eax
#endif
i387 specific ilogb()
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ret