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/*
===========================================================================
Copyright (C) 1999-2005 Id Software, Inc.
This file is part of Quake III Arena source code.
Quake III Arena source code is free software; you can redistribute it
and/or modify it under the terms of the GNU General Public License as
published by the Free Software Foundation; either version 2 of the License,
or (at your option) any later version.
Quake III Arena source code is distributed in the hope that it will be
useful, but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with Foobar; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
===========================================================================
*/
//
// qftol -- fast floating point to long conversion.
//
// 23/09/05 Ported to gas by intel2gas, best supporting actor Tim Angus
// <tim@ngus.net>
#include "qasm.h"
#if id386
.data
temp: .float 0.0
fpucw: .long 0
// Precision Control Field , 2 bits / 0x0300
// PC24 0x0000 Single precision (24 bits).
// PC53 0x0200 Double precision (53 bits).
// PC64 0x0300 Extended precision (64 bits).
// Rounding Control Field, 2 bits / 0x0C00
// RCN 0x0000 Rounding to nearest (even).
// RCD 0x0400 Rounding down (directed, minus).
// RCU 0x0800 Rounding up (directed plus).
// RC0 0x0C00 Rounding towards zero (chop mode).
// rounding towards nearest (even)
cw027F: .long 0x027F
cw037F: .long 0x037F
// rounding towards zero (chop mode)
cw0E7F: .long 0x0E7F
cw0F7F: .long 0x0F7F
.text
//
// int qftol( void ) - default control word
//
.global C(qftol)
C(qftol):
fistpl temp
movl temp,%eax
ret
//
// int qftol027F( void ) - DirectX FPU
//
.global C(qftol027F)
C(qftol027F):
fnstcw fpucw
fldcw cw027F
fistpl temp
fldcw fpucw
movl temp,%eax
ret
//
// int qftol037F( void ) - Linux FPU
//
.global C(qftol037F)
C(qftol037F):
fnstcw fpucw
fldcw cw037F
fistpl temp
fldcw fpucw
movl temp,%eax
ret
//
// int qftol0F7F( void ) - ANSI
//
.global C(qftol0F7F)
C(qftol0F7F):
fnstcw fpucw
fldcw cw0F7F
fistpl temp
fldcw fpucw
movl temp,%eax
ret
//
// int qftol0E7F( void )
//
.global C(qftol0E7F)
C(qftol0E7F):
fnstcw fpucw
fldcw cw0E7F
fistpl temp
fldcw fpucw
movl temp,%eax
ret
//
// long Q_ftol( float q )
//
.global C(Q_ftol)
C(Q_ftol):
flds 4(%esp)
fistpl temp
movl temp,%eax
ret
//
// long qftol0F7F( float q ) - Linux FPU
//
.global C(Q_ftol0F7F)
C(Q_ftol0F7F):
fnstcw fpucw
flds 4(%esp)
fldcw cw0F7F
fistpl temp
fldcw fpucw
movl temp,%eax
ret
#endif
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