/[pcsx2_0.9.7]/trunk/pcsx2/VUflags.cpp
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Contents of /trunk/pcsx2/VUflags.cpp

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Revision 62 - (show annotations) (download)
Tue Sep 7 11:08:22 2010 UTC (9 years, 5 months ago) by william
File size: 2908 byte(s)
Auto Commited Import of: pcsx2-0.9.7-r3738-debug in ./trunk
1 /* PCSX2 - PS2 Emulator for PCs
2 * Copyright (C) 2002-2010 PCSX2 Dev Team
3 *
4 * PCSX2 is free software: you can redistribute it and/or modify it under the terms
5 * of the GNU Lesser General Public License as published by the Free Software Found-
6 * ation, either version 3 of the License, or (at your option) any later version.
7 *
8 * PCSX2 is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
9 * without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
10 * PURPOSE. See the GNU General Public License for more details.
11 *
12 * You should have received a copy of the GNU General Public License along with PCSX2.
13 * If not, see <http://www.gnu.org/licenses/>.
14 */
15
16 #include "PrecompiledHeader.h"
17 #include "Common.h"
18
19 #include <cmath>
20 #include <float.h>
21
22 #include "VUmicro.h"
23
24 /*****************************************/
25 /* NEW FLAGS */ //By asadr. Thnkx F|RES :p
26 /*****************************************/
27
28
29 void vuUpdateDI(VURegs * VU) {
30 // u32 Flag_S = 0;
31 // u32 Flag_I = 0;
32 // u32 Flag_D = 0;
33 //
34 // /*
35 // FLAG D - I
36 // */
37 // Flag_I = (VU->statusflag >> 4) & 0x1;
38 // Flag_D = (VU->statusflag >> 5) & 0x1;
39 //
40 // VU->statusflag|= (Flag_I | (VU0.VI[REG_STATUS_FLAG].US[0] >> 4)) << 10;
41 // VU->statusflag|= (Flag_D | (VU0.VI[REG_STATUS_FLAG].US[0] >> 5)) << 11;
42 }
43
44 static __ri u32 VU_MAC_UPDATE( int shift, VURegs * VU, float f )
45 {
46 u32 v = *(u32*)&f;
47 int exp = (v >> 23) & 0xff;
48 u32 s = v & 0x80000000;
49
50 if (s)
51 VU->macflag |= 0x0010<<shift;
52 else
53 VU->macflag &= ~(0x0010<<shift);
54
55 if( f == 0 )
56 {
57 VU->macflag = (VU->macflag & ~(0x1100<<shift)) | (0x0001<<shift);
58 return v;
59 }
60
61 switch(exp)
62 {
63 case 0:
64 VU->macflag = (VU->macflag&~(0x1000<<shift)) | (0x0101<<shift);
65 return s;
66 case 255:
67 VU->macflag = (VU->macflag&~(0x0100<<shift)) | (0x1000<<shift);
68 return s|0x7f7fffff; /* max allowed */
69 default:
70 VU->macflag = (VU->macflag & ~(0x1101<<shift));
71 return v;
72 }
73 }
74
75 __fi u32 VU_MACx_UPDATE(VURegs * VU, float x)
76 {
77 return VU_MAC_UPDATE(3, VU, x);
78 }
79
80 __fi u32 VU_MACy_UPDATE(VURegs * VU, float y)
81 {
82 return VU_MAC_UPDATE(2, VU, y);
83 }
84
85 __fi u32 VU_MACz_UPDATE(VURegs * VU, float z)
86 {
87 return VU_MAC_UPDATE(1, VU, z);
88 }
89
90 __fi u32 VU_MACw_UPDATE(VURegs * VU, float w)
91 {
92 return VU_MAC_UPDATE(0, VU, w);
93 }
94
95 __fi void VU_MACx_CLEAR(VURegs * VU)
96 {
97 VU->macflag&= ~(0x1111<<3);
98 }
99
100 __fi void VU_MACy_CLEAR(VURegs * VU)
101 {
102 VU->macflag&= ~(0x1111<<2);
103 }
104
105 __fi void VU_MACz_CLEAR(VURegs * VU)
106 {
107 VU->macflag&= ~(0x1111<<1);
108 }
109
110 __fi void VU_MACw_CLEAR(VURegs * VU)
111 {
112 VU->macflag&= ~(0x1111<<0);
113 }
114
115 __ri void VU_STAT_UPDATE(VURegs * VU) {
116 int newflag = 0 ;
117 if (VU->macflag & 0x000F) newflag = 0x1;
118 if (VU->macflag & 0x00F0) newflag |= 0x2;
119 if (VU->macflag & 0x0F00) newflag |= 0x4;
120 if (VU->macflag & 0xF000) newflag |= 0x8;
121 VU->statusflag = (VU->statusflag&0xc30)|newflag|((VU->statusflag&0xf)<<6);
122 }

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