1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
|
/*
===========================================================================
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: .single 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
//
.globl C(qftol)
C(qftol):
fistpl temp
movl temp,%eax
ret
//
// int qftol027F( void ) - DirectX FPU
//
.globl C(qftol027F)
C(qftol027F):
fnstcw fpucw
fldcw cw027F
fistpl temp
fldcw fpucw
movl temp,%eax
ret
//
// int qftol037F( void ) - Linux FPU
//
.globl C(qftol037F)
C(qftol037F):
fnstcw fpucw
fldcw cw037F
fistpl temp
fldcw fpucw
movl temp,%eax
ret
//
// int qftol0F7F( void ) - ANSI
//
.globl C(qftol0F7F)
C(qftol0F7F):
fnstcw fpucw
fldcw cw0F7F
fistpl temp
fldcw fpucw
movl temp,%eax
ret
//
// int qftol0E7F( void )
//
.globl C(qftol0E7F)
C(qftol0E7F):
fnstcw fpucw
fldcw cw0E7F
fistpl temp
fldcw fpucw
movl temp,%eax
ret
//
// long Q_ftol( float q )
//
.globl C(Q_ftol)
C(Q_ftol):
flds 4(%esp)
fistpl temp
movl temp,%eax
ret
//
// long qftol0F7F( float q ) - Linux FPU
//
.globl C(Q_ftol0F7F)
C(Q_ftol0F7F):
fnstcw fpucw
flds 4(%esp)
fldcw cw0F7F
fistpl temp
fldcw fpucw
movl temp,%eax
ret
#endif
|
