mirror of
https://gitlab.com/sortix/sortix.git
synced 2023-02-13 20:55:38 -05:00
45 lines
837 B
ArmAsm
45 lines
837 B
ArmAsm
|
/* $NetBSD: fpsetmask.S,v 1.5 2012/01/19 16:37:18 drochner Exp $ */
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Written by Frank van der Linden at Wasabi Systems for NetBSD.
|
||
|
|
* Public domain.
|
||
|
|
*/
|
||
|
|
|
||
|
|
#include <machine/asm.h>
|
||
|
|
|
||
|
|
/*
|
||
|
|
* XXX set both the x87 control word and the SSE mxcsr register.
|
||
|
|
* Applications should only set exception and round flags
|
||
|
|
* via the fp*() interface, otherwise the status words
|
||
|
|
* will get our of sync.
|
||
|
|
*/
|
||
|
|
|
||
|
|
#ifdef WEAK_ALIAS
|
||
|
|
WEAK_ALIAS(fpsetmask, _fpsetmask)
|
||
|
|
ENTRY(_fpsetmask)
|
||
|
|
#else
|
||
|
|
ENTRY(fpsetmask)
|
||
|
|
#endif
|
||
|
|
notl %edi
|
||
|
|
andl $0x0000003f,%edi
|
||
|
|
|
||
|
|
fnstcw -4(%rsp)
|
||
|
|
movl -4(%rsp), %edx
|
||
|
|
movl %edx, %eax
|
||
|
|
andl $0xffffffc0, %edx
|
||
|
|
orl %edi, %edx
|
||
|
|
movl %edx,-4(%rsp)
|
||
|
|
fldcw -4(%rsp)
|
||
|
|
|
||
|
|
stmxcsr -4(%rsp)
|
||
|
|
movl -4(%rsp), %edx
|
||
|
|
andl $0xffffe07f, %edx
|
||
|
|
sall $7, %edi
|
||
|
|
orl %edi, %edx
|
||
|
|
movl %edx,-4(%rsp)
|
||
|
|
ldmxcsr -4(%rsp)
|
||
|
|
|
||
|
|
notl %eax
|
||
|
|
andl $0x0000003f, %eax
|
||
|
|
ret
|