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.
45 lines
837 B
ArmAsm
45 lines
837 B
ArmAsm
/* $NetBSD: fpsetmask.S,v 1.5 2012/01/19 16:37:18 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 control 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(fpsetmask, _fpsetmask)
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ENTRY(_fpsetmask)
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#else
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ENTRY(fpsetmask)
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#endif
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notl %edi
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andl $0x0000003f,%edi
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fnstcw -4(%rsp)
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movl -4(%rsp), %edx
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movl %edx, %eax
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andl $0xffffffc0, %edx
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orl %edi, %edx
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movl %edx,-4(%rsp)
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fldcw -4(%rsp)
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stmxcsr -4(%rsp)
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movl -4(%rsp), %edx
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andl $0xffffe07f, %edx
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sall $7, %edi
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orl %edi, %edx
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movl %edx,-4(%rsp)
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ldmxcsr -4(%rsp)
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notl %eax
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andl $0x0000003f, %eax
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ret
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