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sortix--sortix/libm/arch/x86_64/fpgetprec.S
Jonas 'Sortie' Termansen 5980be9b3c Add Sortix Math Library.
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.
2013-12-17 14:30:39 +01:00

25 lines
470 B
ArmAsm

/* $NetBSD: fpgetprec.S,v 1.1 2011/03/26 19:51:42 christos Exp $ */
/*
* Written by J.T. Conklin, Apr 4, 1995
* Public domain.
*/
#include <machine/asm.h>
/*
* XXX store only x87 state. If an application only uses the fp*
* interface, this should be in sync with the SSE mxcsr register.
*/
#ifdef WEAK_ALIAS
WEAK_ALIAS(fpgetprec, _fpgetprec)
ENTRY(_fpgetprec)
#else
ENTRY(fpgetprec)
#endif
fnstcw -4(%rsp)
movl -4(%rsp),%eax
rorl $8,%eax
andl $3,%eax
ret