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fpsetmask.S revision 1.5.6.1 
      1  1.5.6.1       tls /*	$NetBSD: fpsetmask.S,v 1.5.6.1 2014/08/20 00:02:12 tls Exp $	*/
      2      1.1      fvdl 
      3      1.1      fvdl /*
      4      1.3      fvdl  * Written by Frank van der Linden at Wasabi Systems for NetBSD.
      5      1.1      fvdl  * Public domain.
      6      1.1      fvdl  */
      7      1.1      fvdl 
      8      1.1      fvdl #include <machine/asm.h>
      9      1.1      fvdl 
     10      1.3      fvdl /*
     11      1.3      fvdl  * XXX set both the x87 control word and the SSE mxcsr register.
     12      1.3      fvdl  * Applications should only set exception and round flags
     13      1.3      fvdl  * via the fp*() interface, otherwise the status words
     14      1.3      fvdl  * will get our of sync.
     15      1.3      fvdl  */
     16      1.3      fvdl 
     17      1.2   thorpej #ifdef WEAK_ALIAS
     18      1.2   thorpej WEAK_ALIAS(fpsetmask, _fpsetmask)
     19      1.2   thorpej ENTRY(_fpsetmask)
     20      1.2   thorpej #else
     21      1.1      fvdl ENTRY(fpsetmask)
     22      1.2   thorpej #endif
     23      1.3      fvdl 	notl	%edi
     24      1.4     njoly 	andl	$0x0000003f,%edi
     25      1.3      fvdl 
     26      1.4     njoly 	fnstcw	-4(%rsp)
     27      1.4     njoly 	movl	-4(%rsp), %edx
     28      1.4     njoly 	movl	%edx, %eax
     29      1.4     njoly 	andl	$0xffffffc0, %edx
     30      1.4     njoly 	orl	%edi, %edx
     31      1.3      fvdl 	movl	%edx,-4(%rsp)
     32      1.4     njoly 	fldcw	-4(%rsp)
     33      1.3      fvdl 
     34      1.4     njoly 	stmxcsr	-4(%rsp)
     35      1.4     njoly 	movl	-4(%rsp), %edx
     36      1.5  drochner 	andl	$0xffffe07f, %edx
     37      1.4     njoly 	sall	$7, %edi
     38      1.4     njoly 	orl	%edi, %edx
     39      1.4     njoly 	movl	%edx,-4(%rsp)
     40      1.4     njoly 	ldmxcsr	-4(%rsp)
     41      1.3      fvdl 
     42      1.4     njoly 	notl	%eax
     43      1.4     njoly 	andl	$0x0000003f, %eax
     44      1.1      fvdl 	ret
     45  1.5.6.1       tls #ifdef WEAK_ALIAS
     46  1.5.6.1       tls END(_fpsetmask)
     47  1.5.6.1       tls #else
     48  1.5.6.1       tls END(fpsetmask)
     49  1.5.6.1       tls #endif
     50