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.
46 lines
798 B
ArmAsm
46 lines
798 B
ArmAsm
/* $NetBSD: fpsetsticky.S,v 1.5 2004/03/09 17:16:13 drochner 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 status word and the SSE mxcsr register.
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* Applications should only set exception and round flags
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* via the fp*() interface, otherwise the status words
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* will get our of sync.
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*/
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#ifdef WEAK_ALIAS
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WEAK_ALIAS(fpsetsticky, _fpsetsticky)
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ENTRY(_fpsetsticky)
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#else
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ENTRY(fpsetsticky)
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#endif
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fnstenv -28(%rsp)
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stmxcsr -32(%rsp)
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andl $63,%edi
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movl -24(%rsp),%eax
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movl %eax,%edx
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andb $0xc0,%dl
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orl %edi,%edx
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movl %edx,-24(%rsp)
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movl -32(%rsp),%edx
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orl %edx,%eax
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andl $63,%eax
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andb $0xc0,%dl
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orl %edi,%edx
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movl %edx,-32(%rsp)
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ldmxcsr -32(%rsp)
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fldenv -28(%rsp)
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ret
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