mirror of
https://gitlab.com/sortix/sortix.git
synced 2023-02-13 20:55:38 -05:00
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
798 B
ArmAsm
45 lines
798 B
ArmAsm
/* $NetBSD: fpsetsticky.S,v 1.5 2004/03/09 17:16:13 drochner Exp $ */
|
|
|
|
/*
|
|
* Written by Frank van der Linden at Wasabi Systems for NetBSD
|
|
* Public domain.
|
|
*/
|
|
|
|
#include <machine/asm.h>
|
|
|
|
/*
|
|
* XXX set both the x87 status 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(fpsetsticky, _fpsetsticky)
|
|
ENTRY(_fpsetsticky)
|
|
#else
|
|
ENTRY(fpsetsticky)
|
|
#endif
|
|
fnstenv -28(%rsp)
|
|
stmxcsr -32(%rsp)
|
|
|
|
andl $63,%edi
|
|
|
|
movl -24(%rsp),%eax
|
|
movl %eax,%edx
|
|
andb $0xc0,%dl
|
|
|
|
orl %edi,%edx
|
|
movl %edx,-24(%rsp)
|
|
|
|
movl -32(%rsp),%edx
|
|
orl %edx,%eax
|
|
andl $63,%eax
|
|
andb $0xc0,%dl
|
|
orl %edi,%edx
|
|
movl %edx,-32(%rsp)
|
|
|
|
ldmxcsr -32(%rsp)
|
|
fldenv -28(%rsp)
|
|
ret
|