x86_64/gen/fpsetmask.S

1.6  uebayasi /*	$NetBSD: fpsetmask.S,v 1.6 2014/05/22 15:01:56 uebayasi Exp $	*/
1.1      fvdl
1.1      fvdl /*
1.3      fvdl  * Written by Frank van der Linden at Wasabi Systems for NetBSD.
1.1      fvdl  * Public domain.
1.1      fvdl  */
1.1      fvdl
1.1      fvdl #include <machine/asm.h>
1.1      fvdl
1.3      fvdl /*
1.3      fvdl  * XXX set both the x87 control word and the SSE mxcsr register.
1.3      fvdl  * Applications should only set exception and round flags
1.3      fvdl  * via the fp*() interface, otherwise the status words
1.3      fvdl  * will get our of sync.
1.3      fvdl  */
1.3      fvdl
1.2   thorpej #ifdef WEAK_ALIAS
1.2   thorpej WEAK_ALIAS(fpsetmask, _fpsetmask)
1.2   thorpej ENTRY(_fpsetmask)
1.2   thorpej #else
1.1      fvdl ENTRY(fpsetmask)
1.2   thorpej #endif
1.3      fvdl 	notl	%edi
1.4     njoly 	andl	$0x0000003f,%edi
1.3      fvdl
1.4     njoly 	fnstcw	-4(%rsp)
1.4     njoly 	movl	-4(%rsp), %edx
1.4     njoly 	movl	%edx, %eax
1.4     njoly 	andl	$0xffffffc0, %edx
1.4     njoly 	orl	%edi, %edx
1.3      fvdl 	movl	%edx,-4(%rsp)
1.4     njoly 	fldcw	-4(%rsp)
1.3      fvdl
1.4     njoly 	stmxcsr	-4(%rsp)
1.4     njoly 	movl	-4(%rsp), %edx
1.5  drochner 	andl	$0xffffe07f, %edx
1.4     njoly 	sall	$7, %edi
1.4     njoly 	orl	%edi, %edx
1.4     njoly 	movl	%edx,-4(%rsp)
1.4     njoly 	ldmxcsr	-4(%rsp)
1.3      fvdl
1.4     njoly 	notl	%eax
1.4     njoly 	andl	$0x0000003f, %eax
1.1      fvdl 	ret
1.6  uebayasi #ifdef WEAK_ALIAS
1.6  uebayasi END(_fpsetmask)
1.6  uebayasi #else
1.6  uebayasi END(fpsetmask)
1.6  uebayasi #endif