mirror of https://github.com/PCSX2/pcsx2.git
123 lines
2.8 KiB
C++
123 lines
2.8 KiB
C++
/* PCSX2 - PS2 Emulator for PCs
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* Copyright (C) 2002-2010 PCSX2 Dev Team
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*
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* PCSX2 is free software: you can redistribute it and/or modify it under the terms
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* of the GNU Lesser General Public License as published by the Free Software Found-
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* ation, either version 3 of the License, or (at your option) any later version.
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*
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* PCSX2 is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
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* without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
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* PURPOSE. See the GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along with PCSX2.
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* If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "PrecompiledHeader.h"
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#include "Common.h"
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#include <cmath>
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#include <float.h>
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#include "VUmicro.h"
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/*****************************************/
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/* NEW FLAGS */ //By asadr. Thnkx F|RES :p
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/*****************************************/
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void vuUpdateDI(VURegs * VU) {
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// u32 Flag_S = 0;
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// u32 Flag_I = 0;
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// u32 Flag_D = 0;
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//
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// /*
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// FLAG D - I
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// */
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// Flag_I = (VU->statusflag >> 4) & 0x1;
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// Flag_D = (VU->statusflag >> 5) & 0x1;
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//
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// VU->statusflag|= (Flag_I | (VU0.VI[REG_STATUS_FLAG].US[0] >> 4)) << 10;
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// VU->statusflag|= (Flag_D | (VU0.VI[REG_STATUS_FLAG].US[0] >> 5)) << 11;
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}
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static __ri u32 VU_MAC_UPDATE( int shift, VURegs * VU, float f )
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{
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u32 v = *(u32*)&f;
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int exp = (v >> 23) & 0xff;
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u32 s = v & 0x80000000;
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if (s)
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VU->macflag |= 0x0010<<shift;
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else
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VU->macflag &= ~(0x0010<<shift);
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if( f == 0 )
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{
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VU->macflag = (VU->macflag & ~(0x1100<<shift)) | (0x0001<<shift);
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return v;
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}
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switch(exp)
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{
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case 0:
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VU->macflag = (VU->macflag&~(0x1000<<shift)) | (0x0101<<shift);
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return s;
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case 255:
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VU->macflag = (VU->macflag&~(0x0100<<shift)) | (0x1000<<shift);
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return s|0x7f7fffff; /* max allowed */
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default:
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VU->macflag = (VU->macflag & ~(0x1101<<shift));
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return v;
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}
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}
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__fi u32 VU_MACx_UPDATE(VURegs * VU, float x)
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{
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return VU_MAC_UPDATE(3, VU, x);
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}
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__fi u32 VU_MACy_UPDATE(VURegs * VU, float y)
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{
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return VU_MAC_UPDATE(2, VU, y);
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}
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__fi u32 VU_MACz_UPDATE(VURegs * VU, float z)
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{
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return VU_MAC_UPDATE(1, VU, z);
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}
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__fi u32 VU_MACw_UPDATE(VURegs * VU, float w)
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{
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return VU_MAC_UPDATE(0, VU, w);
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}
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__fi void VU_MACx_CLEAR(VURegs * VU)
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{
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VU->macflag&= ~(0x1111<<3);
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}
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__fi void VU_MACy_CLEAR(VURegs * VU)
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{
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VU->macflag&= ~(0x1111<<2);
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}
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__fi void VU_MACz_CLEAR(VURegs * VU)
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{
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VU->macflag&= ~(0x1111<<1);
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}
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__fi void VU_MACw_CLEAR(VURegs * VU)
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{
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VU->macflag&= ~(0x1111<<0);
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}
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__ri void VU_STAT_UPDATE(VURegs * VU) {
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int newflag = 0 ;
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if (VU->macflag & 0x000F) newflag = 0x1;
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if (VU->macflag & 0x00F0) newflag |= 0x2;
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if (VU->macflag & 0x0F00) newflag |= 0x4;
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if (VU->macflag & 0xF000) newflag |= 0x8;
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VU->statusflag = (VU->statusflag&0xc30)|newflag|((VU->statusflag&0xf)<<6);
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}
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