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
|
/*
* Copyright (C) 2002-2010 The DOSBox Team
*
* This program 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.
*
* This program 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 this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#ifndef DOSBOX_FPU_H
#define DOSBOX_FPU_H
#ifndef DOSBOX_MEM_H
#include "mem.h"
#endif
void FPU_ESC0_Normal(Bitu rm);
void FPU_ESC0_EA(Bitu func,PhysPt ea);
void FPU_ESC1_Normal(Bitu rm);
void FPU_ESC1_EA(Bitu func,PhysPt ea);
void FPU_ESC2_Normal(Bitu rm);
void FPU_ESC2_EA(Bitu func,PhysPt ea);
void FPU_ESC3_Normal(Bitu rm);
void FPU_ESC3_EA(Bitu func,PhysPt ea);
void FPU_ESC4_Normal(Bitu rm);
void FPU_ESC4_EA(Bitu func,PhysPt ea);
void FPU_ESC5_Normal(Bitu rm);
void FPU_ESC5_EA(Bitu func,PhysPt ea);
void FPU_ESC6_Normal(Bitu rm);
void FPU_ESC6_EA(Bitu func,PhysPt ea);
void FPU_ESC7_Normal(Bitu rm);
void FPU_ESC7_EA(Bitu func,PhysPt ea);
typedef union {
double d;
#ifndef WORDS_BIGENDIAN
struct {
Bit32u lower;
Bit32s upper;
} l;
#else
struct {
Bit32s upper;
Bit32u lower;
} l;
#endif
Bit64s ll;
} FPU_Reg;
typedef struct {
Bit32u m1;
Bit32u m2;
Bit16u m3;
Bit16u d1;
Bit32u d2;
} FPU_P_Reg;
enum FPU_Tag {
TAG_Valid = 0,
TAG_Zero = 1,
TAG_Weird = 2,
TAG_Empty = 3
};
enum FPU_Round {
ROUND_Nearest = 0,
ROUND_Down = 1,
ROUND_Up = 2,
ROUND_Chop = 3
};
typedef struct {
FPU_Reg regs[9];
FPU_P_Reg p_regs[9];
FPU_Tag tags[9];
Bit16u cw,cw_mask_all;
Bit16u sw;
Bit32u top;
FPU_Round round;
} FPU_rec;
//get pi from a real library
#define PI 3.14159265358979323846
#define L2E 1.4426950408889634
#define L2T 3.3219280948873623
#define LN2 0.69314718055994531
#define LG2 0.3010299956639812
extern FPU_rec fpu;
#define TOP fpu.top
#define STV(i) ( (fpu.top+ (i) ) & 7 )
Bit16u FPU_GetTag(void);
void FPU_FLDCW(PhysPt addr);
static INLINE void FPU_SetTag(Bit16u tag){
for(Bitu i=0;i<8;i++)
fpu.tags[i] = static_cast<FPU_Tag>((tag >>(2*i))&3);
}
static INLINE void FPU_SetCW(Bitu word){
fpu.cw = (Bit16u)word;
fpu.cw_mask_all = (Bit16u)(word | 0x3f);
fpu.round = (FPU_Round)((word >> 10) & 3);
}
static INLINE Bitu FPU_GET_TOP(void) {
return (fpu.sw & 0x3800)>>11;
}
static INLINE void FPU_SET_TOP(Bitu val){
fpu.sw &= ~0x3800;
fpu.sw |= (val&7)<<11;
}
static INLINE void FPU_SET_C0(Bitu C){
fpu.sw &= ~0x0100;
if(C) fpu.sw |= 0x0100;
}
static INLINE void FPU_SET_C1(Bitu C){
fpu.sw &= ~0x0200;
if(C) fpu.sw |= 0x0200;
}
static INLINE void FPU_SET_C2(Bitu C){
fpu.sw &= ~0x0400;
if(C) fpu.sw |= 0x0400;
}
static INLINE void FPU_SET_C3(Bitu C){
fpu.sw &= ~0x4000;
if(C) fpu.sw |= 0x4000;
}
#endif
|
