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5980be9b3c
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.
33 lines
578 B
ArmAsm
33 lines
578 B
ArmAsm
/* $NetBSD: fpsetround.S,v 1.5 2011/09/30 23:45:41 christos Exp $ */
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/*
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* Written by Frank van der Linden at Wasabi Systems for NetBSD.
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* Public domain.
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*/
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#include <machine/asm.h>
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/*
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* XXX set both the x87 control word
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* Applications should only set exception and round flags
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*/
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#ifdef WEAK_ALIAS
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WEAK_ALIAS(fpsetround, _fpsetround)
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ENTRY(_fpsetround)
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#else
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ENTRY(fpsetround)
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#endif
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fnstcw -4(%esp)
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movl -4(%esp), %edx
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movl %edx, %eax
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andl $0x00000c00, %eax
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andl $0xfffff3ff, %edx
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movl 4(%esp), %ecx
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orl %ecx, %edx
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movl %edx, -4(%esp)
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fldcw -4(%esp)
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ret
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