phunix/lib/libc/arch/i386/gen/fpsetround.S
Lionel Sambuc 0a6a1f1d05 NetBSD re-synchronization of the source tree
This brings our tree to NetBSD 7.0, as found on -current on the
10-10-2015.

This updates:
 - LLVM to 3.6.1
 - GCC to GCC 5.1
 - Replace minix/commands/zdump with usr.bin/zdump
 - external/bsd/libelf has moved to /external/bsd/elftoolchain/
 - Import ctwm
 - Drop sprintf from libminc

Change-Id: I149836ac18e9326be9353958bab9b266efb056f0
2016-01-13 20:32:14 +01:00

39 lines
644 B
ArmAsm

/* $NetBSD: fpsetround.S,v 1.6 2014/05/23 02:34:19 uebayasi 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
* Applications should only set exception and round flags
*/
#ifdef WEAK_ALIAS
WEAK_ALIAS(fpsetround, _fpsetround)
ENTRY(_fpsetround)
#else
ENTRY(fpsetround)
#endif
fnstcw -4(%esp)
movl -4(%esp), %edx
movl %edx, %eax
andl $0x00000c00, %eax
andl $0xfffff3ff, %edx
movl 4(%esp), %ecx
orl %ecx, %edx
movl %edx, -4(%esp)
fldcw -4(%esp)
ret
#ifdef WEAK_ALIAS
END(_fpsetround)
#else
END(fpsetround)
#endif