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BizHawk/psx/octoshock/psx/gte.cpp

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/* Mednafen - Multi-system Emulator
*
* 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
*/
#include "psx.h"
#include "gte.h"
#undef FALSE
#undef TRUE
#define FALSE 0
#define TRUE 1
/* Notes:
AVSZ3/AVSZ4:
OTZ is MAC0 >> 12
OTZ overflow/underflow flag is set in an overflow condition even if MAC0 == 0.
sf field bit has no effect?
FLAG register:
Bits present mask: 0xfffff000
Checksum bit can't be directly set, it's apparently calculated like (bool)(FLAGS & 0x7f87e000)
Instructions effectively clear it 0 at start. (todo: test "invalid" instructions)
X/Y FIFO [3] register write pushes a copy down to [2]
*/
#ifndef PSXDEV_GTE_TESTING
namespace MDFN_IEN_PSX
{
#endif
EW_PACKED(
struct gtematrix
{
int16 MX[3][3];
int16 dummy;
});
typedef struct
{
union
{
struct
{
uint8 R;
uint8 G;
uint8 B;
uint8 CD;
};
uint8 Raw8[4];
};
} gtergb;
typedef struct
{
int16 X;
int16 Y;
} gtexy;
static uint32 CR[32];
static uint32 FLAGS; // Temporary for instruction execution, copied into CR[31] at end of instruction execution.
typedef union
{
gtematrix All[4];
int32 Raw[4][5]; // Don't read from this(Raw[][]), only write(and when writing, if running on a big-endian platform, swap the upper 16-bits with the lower 16-bits)
int16 Raw16[4][10];
struct
{
gtematrix Rot;
gtematrix Light;
gtematrix Color;
gtematrix AbbyNormal;
};
} Matrices_t;
static Matrices_t Matrices;
static union
{
int32 All[4][4]; // Really only [4][3], but [4] to ease address calculation.
struct
{
int32 T[4];
int32 B[4];
int32 FC[4];
int32 Null[4];
};
} CRVectors;
static int32 OFX;
static int32 OFY;
static uint16 H;
static int16 DQA;
static int32 DQB;
static int16 ZSF3;
static int16 ZSF4;
// Begin DR
static int16 Vectors[3][4];
static gtergb RGB;
static uint16 OTZ;
static int16 IR[4];
#define IR0 IR[0]
#define IR1 IR[1]
#define IR2 IR[2]
#define IR3 IR[3]
static gtexy XY_FIFO[4];
static uint16 Z_FIFO[4];
static gtergb RGB_FIFO[3];
static int32 MAC[4];
static uint32 LZCS;
static uint32 LZCR;
static uint32 Reg23;
// end DR
static INLINE uint8 Sat5(int16 cc)
{
if(cc < 0)
cc = 0;
if(cc > 0x1F)
cc = 0x1F;
return(cc);
}
//
// Newton-Raphson division table. (Initialized at startup; do NOT save in save states!)
//
static uint8 DivTable[0x100 + 1];
static INLINE uint32 CalcRecip(uint16 divisor)
{
int32 x = (0x101 + DivTable[(((divisor & 0x7FFF) + 0x40) >> 7)]);
int32 tmp = (((int32)divisor * -x) + 0x80) >> 8;
int32 tmp2 = ((x * (131072 + tmp)) + 0x80) >> 8;
return(tmp2);
}
void GTE_Init(void)
{
for(uint32_t divisor = 0x8000; divisor < 0x10000; divisor += 0x80)
{
uint32_t xa = 512;
for(unsigned i = 1; i < 5; i++)
{
xa = (xa * (1024 * 512 - ((divisor >> 7) * xa))) >> 18;
}
DivTable[(divisor >> 7) & 0xFF] = ((xa + 1) >> 1) - 0x101;
//printf("%04x, %02x\n", divisor, ((xa + 1) >> 1) - 0x101);
}
//
// To avoid a bounds limiting if statement in the emulation code:
DivTable[0x100] = DivTable[0xFF];
}
void GTE_Power(void)
{
memset(CR, 0, sizeof(CR));
//memset(DR, 0, sizeof(DR));
const int x = 5;
char v[x];
memset(Matrices.All, 0, sizeof(Matrices.All));
memset(CRVectors.All, 0, sizeof(CRVectors.All));
OFX = 0;
OFY = 0;
H = 0;
DQA = 0;
DQB = 0;
ZSF3 = 0;
ZSF4 = 0;
memset(Vectors, 0, sizeof(Vectors));
memset(&RGB, 0, sizeof(RGB));
OTZ = 0;
IR0 = 0;
IR1 = 0;
IR2 = 0;
IR3 = 0;
memset(XY_FIFO, 0, sizeof(XY_FIFO));
memset(Z_FIFO, 0, sizeof(Z_FIFO));
memset(RGB_FIFO, 0, sizeof(RGB_FIFO));
memset(MAC, 0, sizeof(MAC));
LZCS = 0;
LZCR = 0;
Reg23 = 0;
}
void GTE_WriteCR(unsigned int which, uint32 value)
{
static const uint32 mask_table[32] = {
/* 0x00 */
0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0x0000FFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF,
/* 0x08 */
0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0x0000FFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF,
/* 0x10 */
0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0x0000FFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF,
/* 0x18 */
0xFFFFFFFF, 0xFFFFFFFF, 0x0000FFFF, 0x0000FFFF, 0xFFFFFFFF, 0x0000FFFF, 0x0000FFFF, 0xFFFFFFFF
};
//PSX_WARNING("[GTE] Write CR %d, 0x%08x", which, value);
value &= mask_table[which];
CR[which] = value | (CR[which] & ~mask_table[which]);
if(which < 24)
{
int we = which >> 3;
which &= 0x7;
if(which >= 5)
CRVectors.All[we][which - 5] = value;
else
{
#ifdef MSB_FIRST
Matrices.Raw[we][which] = (value << 16) | (value >> 16);
#else
Matrices.Raw[we][which] = value;
#endif
}
return;
}
switch(which)
{
case 24:
OFX = value;
break;
case 25:
OFY = value;
break;
case 26:
H = value;
break;
case 27:
DQA = value;
break;
case 28:
DQB = value;
break;
case 29:
ZSF3 = value;
break;
case 30:
ZSF4 = value;
break;
case 31:
CR[31] = (value & 0x7ffff000) | ((value & 0x7f87e000) ? (1 << 31) : 0);
break;
}
}
uint32 GTE_ReadCR(unsigned int which)
{
uint32 ret = 0;
switch(which)
{
default:
ret = CR[which];
if(which == 4 || which == 12 || which == 20)
ret = (int16)ret;
break;
case 24:
ret = OFX;
break;
case 25:
ret = OFY;
break;
case 26:
ret = (int16)H;
break;
case 27:
ret = (int16)DQA;
break;
case 28:
ret = DQB;
break;
case 29:
ret = (int16)ZSF3;
break;
case 30:
ret = (int16)ZSF4;
break;
case 31:
ret = CR[31];
break;
}
return(ret);
}
void GTE_WriteDR(unsigned int which, uint32 value)
{
switch(which & 0x1F)
{
case 0:
Vectors[0][0] = value;
Vectors[0][1] = value >> 16;
break;
case 1:
Vectors[0][2] = value;
break;
case 2:
Vectors[1][0] = value;
Vectors[1][1] = value >> 16;
break;
case 3:
Vectors[1][2] = value;
break;
case 4:
Vectors[2][0] = value;
Vectors[2][1] = value >> 16;
break;
case 5:
Vectors[2][2] = value;
break;
case 6:
RGB.R = value >> 0;
RGB.G = value >> 8;
RGB.B = value >> 16;
RGB.CD = value >> 24;
break;
case 7:
OTZ = value;
break;
case 8:
IR0 = value;
break;
case 9:
IR1 = value;
break;
case 10:
IR2 = value;
break;
case 11:
IR3 = value;
break;
case 12:
XY_FIFO[0].X = value;
XY_FIFO[0].Y = value >> 16;
break;
case 13:
XY_FIFO[1].X = value;
XY_FIFO[1].Y = value >> 16;
break;
case 14:
XY_FIFO[2].X = value;
XY_FIFO[2].Y = value >> 16;
XY_FIFO[3].X = value;
XY_FIFO[3].Y = value >> 16;
break;
case 15:
XY_FIFO[3].X = value;
XY_FIFO[3].Y = value >> 16;
XY_FIFO[0] = XY_FIFO[1];
XY_FIFO[1] = XY_FIFO[2];
XY_FIFO[2] = XY_FIFO[3];
break;
case 16:
Z_FIFO[0] = value;
break;
case 17:
Z_FIFO[1] = value;
break;
case 18:
Z_FIFO[2] = value;
break;
case 19:
Z_FIFO[3] = value;
break;
case 20:
RGB_FIFO[0].R = value;
RGB_FIFO[0].G = value >> 8;
RGB_FIFO[0].B = value >> 16;
RGB_FIFO[0].CD = value >> 24;
break;
case 21:
RGB_FIFO[1].R = value;
RGB_FIFO[1].G = value >> 8;
RGB_FIFO[1].B = value >> 16;
RGB_FIFO[1].CD = value >> 24;
break;
case 22:
RGB_FIFO[2].R = value;
RGB_FIFO[2].G = value >> 8;
RGB_FIFO[2].B = value >> 16;
RGB_FIFO[2].CD = value >> 24;
break;
case 23:
Reg23 = value;
break;
case 24:
MAC[0] = value;
break;
case 25:
MAC[1] = value;
break;
case 26:
MAC[2] = value;
break;
case 27:
MAC[3] = value;
break;
case 28:
IR1 = ((value >> 0) & 0x1F) << 7;
IR2 = ((value >> 5) & 0x1F) << 7;
IR3 = ((value >> 10) & 0x1F) << 7;
break;
case 29: // Read-only
break;
case 30:
LZCS = value;
{
uint32 test = value & 0x80000000;
LZCR = 0;
while((value & 0x80000000) == test && LZCR < 32)
{
LZCR++;
value <<= 1;
}
}
break;
case 31: // Read-only
break;
}
}
uint32 GTE_ReadDR(unsigned int which)
{
uint32 ret = 0;
switch(which & 0x1F)
{
case 0:
ret = (uint16)Vectors[0][0] | ((uint16)Vectors[0][1] << 16);
break;
case 1:
ret = (int16)Vectors[0][2];
break;
case 2:
ret = (uint16)Vectors[1][0] | ((uint16)Vectors[1][1] << 16);
break;
case 3:
ret = (int16)Vectors[1][2];
break;
case 4:
ret = (uint16)Vectors[2][0] | ((uint16)Vectors[2][1] << 16);
break;
case 5:
ret = (int16)Vectors[2][2];
break;
case 6:
ret = RGB.R | (RGB.G << 8) | (RGB.B << 16) | (RGB.CD << 24);
break;
case 7:
ret = (uint16)OTZ;
break;
case 8:
ret = (int16)IR0;
break;
case 9:
ret = (int16)IR1;
break;
case 10:
ret = (int16)IR2;
break;
case 11:
ret = (int16)IR3;
break;
case 12:
ret = (uint16)XY_FIFO[0].X | ((uint16)XY_FIFO[0].Y << 16);
break;
case 13:
ret = (uint16)XY_FIFO[1].X | ((uint16)XY_FIFO[1].Y << 16);
break;
case 14:
ret = (uint16)XY_FIFO[2].X | ((uint16)XY_FIFO[2].Y << 16);
break;
case 15:
ret = (uint16)XY_FIFO[3].X | ((uint16)XY_FIFO[3].Y << 16);
break;
case 16:
ret = (uint16)Z_FIFO[0];
break;
case 17:
ret = (uint16)Z_FIFO[1];
break;
case 18:
ret = (uint16)Z_FIFO[2];
break;
case 19:
ret = (uint16)Z_FIFO[3];
break;
case 20:
ret = RGB_FIFO[0].R | (RGB_FIFO[0].G << 8) | (RGB_FIFO[0].B << 16) | (RGB_FIFO[0].CD << 24);
break;
case 21:
ret = RGB_FIFO[1].R | (RGB_FIFO[1].G << 8) | (RGB_FIFO[1].B << 16) | (RGB_FIFO[1].CD << 24);
break;
case 22:
ret = RGB_FIFO[2].R | (RGB_FIFO[2].G << 8) | (RGB_FIFO[2].B << 16) | (RGB_FIFO[2].CD << 24);
break;
case 23:
ret = Reg23;
break;
case 24:
ret = MAC[0];
break;
case 25:
ret = MAC[1];
break;
case 26:
ret = MAC[2];
break;
case 27:
ret = MAC[3];
break;
case 28:
case 29:
ret = Sat5(IR1 >> 7) | (Sat5(IR2 >> 7) << 5) | (Sat5(IR3 >> 7) << 10);
break;
case 30:
ret = LZCS;
break;
case 31:
ret = LZCR;
break;
}
return(ret);
}
#define sign_x_to_s64(_bits, _value) (((int64)((uint64)(_value) << (64 - _bits))) >> (64 - _bits))
static INLINE int64 A_MV(unsigned which, int64 value)
{
if(value >= (1LL << 43))
FLAGS |= 1 << (30 - which);
if(value < -(1LL << 43))
FLAGS |= 1 << (27 - which);
return sign_x_to_s64(44, value);
}
static INLINE int64 F(int64 value)
{
if(value < -2147483648LL)
{
// flag set here
FLAGS |= 1 << 15;
}
if(value > 2147483647LL)
{
// flag set here
FLAGS |= 1 << 16;
}
return(value);
}
static INLINE int16 Lm_B(unsigned int which, int32 value, int lm)
{
int32 tmp = lm << 15;
if(value < (-32768 + tmp))
{
// set flag here
FLAGS |= 1 << (24 - which);
value = -32768 + tmp;
}
if(value > 32767)
{
// Set flag here
FLAGS |= 1 << (24 - which);
value = 32767;
}
return(value);
}
static INLINE int16 Lm_B_PTZ(unsigned int which, int32 value, int32 ftv_value, int lm)
{
int32 tmp = lm << 15;
if(ftv_value < -32768)
{
FLAGS |= 1 << (24 - which);
}
if(ftv_value > 32767)
{
FLAGS |= 1 << (24 - which);
}
if(value < (-32768 + tmp))
{
value = -32768 + tmp;
}
if(value > 32767)
{
value = 32767;
}
return(value);
}
static INLINE uint8 Lm_C(unsigned int which, int32 value)
{
if(value & ~0xFF)
{
// Set flag here
FLAGS |= 1 << (21 - which); // Tested with GPF
if(value < 0)
value = 0;
if(value > 255)
value = 255;
}
return(value);
}
static INLINE int32 Lm_D(int32 value, int unchained)
{
// Not sure if we should have it as int64, or just chain on to and special case when the F flags are set.
if(!unchained)
{
if(FLAGS & (1 << 15))
{
FLAGS |= 1 << 18;
return(0);
}
if(FLAGS & (1 << 16))
{
FLAGS |= 1 << 18;
return(0xFFFF);
}
}
if(value < 0)
{
// Set flag here
value = 0;
FLAGS |= 1 << 18; // Tested with AVSZ3
}
else if(value > 65535)
{
// Set flag here.
value = 65535;
FLAGS |= 1 << 18; // Tested with AVSZ3
}
return(value);
}
static INLINE int32 Lm_G(unsigned int which, int32 value)
{
if(value < -1024)
{
// Set flag here
value = -1024;
FLAGS |= 1 << (14 - which);
}
if(value > 1023)
{
// Set flag here.
value = 1023;
FLAGS |= 1 << (14 - which);
}
return(value);
}
// limit to 4096, not 4095
static INLINE int32 Lm_H(int32 value)
{
if(value < 0)
{
value = 0;
FLAGS |= 1 << 12;
}
if(value > 4096)
{
value = 4096;
FLAGS |= 1 << 12;
}
return(value);
}
static INLINE void MAC_to_RGB_FIFO(void)
{
RGB_FIFO[0] = RGB_FIFO[1];
RGB_FIFO[1] = RGB_FIFO[2];
RGB_FIFO[2].R = Lm_C(0, MAC[1] >> 4);
RGB_FIFO[2].G = Lm_C(1, MAC[2] >> 4);
RGB_FIFO[2].B = Lm_C(2, MAC[3] >> 4);
RGB_FIFO[2].CD = RGB.CD;
}
static INLINE void MAC_to_IR(int lm)
{
IR1 = Lm_B(0, MAC[1], lm);
IR2 = Lm_B(1, MAC[2], lm);
IR3 = Lm_B(2, MAC[3], lm);
}
static INLINE void MultiplyMatrixByVector(const gtematrix *matrix, const int16 *v, const int32 *crv, uint32 sf, int lm)
{
unsigned i;
for(i = 0; i < 3; i++)
{
int64 tmp;
int32 mulr[3];
tmp = (uint64)(int64)crv[i] << 12;
if(matrix == &Matrices.AbbyNormal)
{
if(i == 0)
{
mulr[0] = -((RGB.R << 4) * v[0]);
mulr[1] = (RGB.R << 4) * v[1];
mulr[2] = IR0 * v[2];
}
else
{
mulr[0] = (int16)CR[i] * v[0];
mulr[1] = (int16)CR[i] * v[1];
mulr[2] = (int16)CR[i] * v[2];
}
}
else
{
mulr[0] = matrix->MX[i][0] * v[0];
mulr[1] = matrix->MX[i][1] * v[1];
mulr[2] = matrix->MX[i][2] * v[2];
}
tmp = A_MV(i, tmp + mulr[0]);
if(crv == CRVectors.FC)
{
Lm_B(i, tmp >> sf, FALSE);
tmp = 0;
}
tmp = A_MV(i, tmp + mulr[1]);
tmp = A_MV(i, tmp + mulr[2]);
MAC[1 + i] = tmp >> sf;
}
MAC_to_IR(lm);
}
static INLINE void MultiplyMatrixByVector_PT(const gtematrix *matrix, const int16 *v, const int32 *crv, uint32 sf, int lm)
{
int64 tmp[3];
unsigned i;
for(i = 0; i < 3; i++)
{
int32 mulr[3];
tmp[i] = (uint64)(int64)crv[i] << 12;
mulr[0] = matrix->MX[i][0] * v[0];
mulr[1] = matrix->MX[i][1] * v[1];
mulr[2] = matrix->MX[i][2] * v[2];
tmp[i] = A_MV(i, tmp[i] + mulr[0]);
tmp[i] = A_MV(i, tmp[i] + mulr[1]);
tmp[i] = A_MV(i, tmp[i] + mulr[2]);
MAC[1 + i] = tmp[i] >> sf;
}
IR1 = Lm_B(0, MAC[1], lm);
IR2 = Lm_B(1, MAC[2], lm);
//printf("FTV: %08x %08x\n", crv[2], (uint32)(tmp[2] >> 12));
IR3 = Lm_B_PTZ(2, MAC[3], tmp[2] >> 12, lm);
Z_FIFO[0] = Z_FIFO[1];
Z_FIFO[1] = Z_FIFO[2];
Z_FIFO[2] = Z_FIFO[3];
Z_FIFO[3] = Lm_D(tmp[2] >> 12, TRUE);
}
#define DECODE_FIELDS \
const uint32 sf MDFN_NOWARN_UNUSED = (instr & (1 << 19)) ? 12 : 0; \
const uint32 mx MDFN_NOWARN_UNUSED = (instr >> 17) & 0x3; \
const uint32 v_i = (instr >> 15) & 0x3; \
const int32* cv MDFN_NOWARN_UNUSED = CRVectors.All[(instr >> 13) & 0x3]; \
const int lm MDFN_NOWARN_UNUSED = (instr >> 10) & 1; \
int16 v[3] MDFN_NOWARN_UNUSED; \
if(v_i == 3) \
{ \
v[0] = IR1; \
v[1] = IR2; \
v[2] = IR3; \
} \
else \
{ \
v[0] = Vectors[v_i][0]; \
v[1] = Vectors[v_i][1]; \
v[2] = Vectors[v_i][2]; \
}
static int32 SQR(uint32 instr)
{
DECODE_FIELDS;
MAC[1] = ((IR1 * IR1) >> sf);
MAC[2] = ((IR2 * IR2) >> sf);
MAC[3] = ((IR3 * IR3) >> sf);
MAC_to_IR(lm);
return(5);
}
static int32 MVMVA(uint32 instr)
{
DECODE_FIELDS;
MultiplyMatrixByVector(&Matrices.All[mx], v, cv, sf, lm);
return(8);
}
static INLINE unsigned CountLeadingZeroU16(uint16 val)
{
unsigned ret = 0;
while(!(val & 0x8000) && ret < 16)
{
val <<= 1;
ret++;
}
return ret;
}
static INLINE uint32 Divide(uint32 dividend, uint32 divisor)
{
//if((Z_FIFO[3] * 2) > H)
if((divisor * 2) > dividend)
{
unsigned shift_bias = CountLeadingZeroU16(divisor);
dividend <<= shift_bias;
divisor <<= shift_bias;
return std::min<uint32>(0x1FFFF, ((uint64)dividend * CalcRecip(divisor | 0x8000) + 32768) >> 16);
}
else
{
FLAGS |= 1 << 17;
return 0x1FFFF;
}
}
static INLINE void TransformXY(int64 h_div_sz)
{
MAC[0] = F((int64)OFX + IR1 * h_div_sz) >> 16;
XY_FIFO[3].X = Lm_G(0, MAC[0]);
MAC[0] = F((int64)OFY + IR2 * h_div_sz) >> 16;
XY_FIFO[3].Y = Lm_G(1, MAC[0]);
XY_FIFO[0] = XY_FIFO[1];
XY_FIFO[1] = XY_FIFO[2];
XY_FIFO[2] = XY_FIFO[3];
}
static INLINE void TransformDQ(int64 h_div_sz)
{
MAC[0] = F((int64)DQB + DQA * h_div_sz);
IR0 = Lm_H(((int64)DQB + DQA * h_div_sz) >> 12);
}
static int32 RTPS(uint32 instr)
{
DECODE_FIELDS;
int64 h_div_sz;
MultiplyMatrixByVector_PT(&Matrices.Rot, Vectors[0], CRVectors.T, sf, lm);
h_div_sz = Divide(H, Z_FIFO[3]);
TransformXY(h_div_sz);
TransformDQ(h_div_sz);
return(15);
}
static int32 RTPT(uint32 instr)
{
DECODE_FIELDS;
int i;
for(i = 0; i < 3; i++)
{
int64 h_div_sz;
MultiplyMatrixByVector_PT(&Matrices.Rot, Vectors[i], CRVectors.T, sf, lm);
h_div_sz = Divide(H, Z_FIFO[3]);
TransformXY(h_div_sz);
if(i == 2)
TransformDQ(h_div_sz);
}
return(23);
}
static INLINE void NormColor(uint32 sf, int lm, uint32 v)
{
int16 tmp_vector[3];
MultiplyMatrixByVector(&Matrices.Light, Vectors[v], CRVectors.Null, sf, lm);
tmp_vector[0] = IR1; tmp_vector[1] = IR2; tmp_vector[2] = IR3;
MultiplyMatrixByVector(&Matrices.Color, tmp_vector, CRVectors.B, sf, lm);
MAC_to_RGB_FIFO();
}
static int32 NCS(uint32 instr)
{
DECODE_FIELDS;
NormColor(sf, lm, 0);
return(14);
}
static int32 NCT(uint32 instr)
{
DECODE_FIELDS;
int i;
for(i = 0; i < 3; i++)
NormColor(sf, lm, i);
return(30);
}
static INLINE void NormColorColor(uint32 v, uint32 sf, int lm)
{
int16 tmp_vector[3];
MultiplyMatrixByVector(&Matrices.Light, Vectors[v], CRVectors.Null, sf, lm);
tmp_vector[0] = IR1; tmp_vector[1] = IR2; tmp_vector[2] = IR3;
MultiplyMatrixByVector(&Matrices.Color, tmp_vector, CRVectors.B, sf, lm);
MAC[1] = ((RGB.R << 4) * IR1) >> sf;
MAC[2] = ((RGB.G << 4) * IR2) >> sf;
MAC[3] = ((RGB.B << 4) * IR3) >> sf;
MAC_to_IR(lm);
MAC_to_RGB_FIFO();
}
static int32 NCCS(uint32 instr)
{
DECODE_FIELDS;
NormColorColor(0, sf, lm);
return(17);
}
static int32 NCCT(uint32 instr)
{
int i;
DECODE_FIELDS;
for(i = 0; i < 3; i++)
NormColorColor(i, sf, lm);
return(39);
}
static INLINE void DepthCue(int mult_IR123, int RGB_from_FIFO, uint32 sf, int lm)
{
int32 RGB_temp[3];
int32 IR_temp[3] = { IR1, IR2, IR3 };
int i;
//assert(sf);
if(RGB_from_FIFO)
{
RGB_temp[0] = RGB_FIFO[0].R << 4;
RGB_temp[1] = RGB_FIFO[0].G << 4;
RGB_temp[2] = RGB_FIFO[0].B << 4;
}
else
{
RGB_temp[0] = RGB.R << 4;
RGB_temp[1] = RGB.G << 4;
RGB_temp[2] = RGB.B << 4;
}
if(mult_IR123)
{
for(i = 0; i < 3; i++)
{
MAC[1 + i] = A_MV(i, ((int64)((uint64)(int64)CRVectors.FC[i] << 12) - RGB_temp[i] * IR_temp[i])) >> sf;
MAC[1 + i] = A_MV(i, (RGB_temp[i] * IR_temp[i] + IR0 * Lm_B(i, MAC[1 + i], FALSE))) >> sf;
}
}
else
{
for(i = 0; i < 3; i++)
{
MAC[1 + i] = A_MV(i, ((int64)((uint64)(int64)CRVectors.FC[i] << 12) - (int32)((uint32)RGB_temp[i] << 12))) >> sf;
MAC[1 + i] = A_MV(i, ((int64)((uint64)(int64)RGB_temp[i] << 12) + IR0 * Lm_B(i, MAC[1 + i], FALSE))) >> sf;
}
}
MAC_to_IR(lm);
MAC_to_RGB_FIFO();
}
static int32 DCPL(uint32 instr)
{
DECODE_FIELDS;
DepthCue(TRUE, FALSE, sf, lm);
return(8);
}
static int32 DPCS(uint32 instr)
{
DECODE_FIELDS;
DepthCue(FALSE, FALSE, sf, lm);
return(8);
}
static int32 DPCT(uint32 instr)
{
int i;
DECODE_FIELDS;
for(i = 0; i < 3; i++)
{
DepthCue(FALSE, TRUE, sf, lm);
}
return(17);
}
static int32 INTPL(uint32 instr)
{
DECODE_FIELDS;
MAC[1] = A_MV(0, ((int64)((uint64)(int64)CRVectors.FC[0] << 12) - (int32)((uint32)(int32)IR1 << 12))) >> sf;
MAC[2] = A_MV(1, ((int64)((uint64)(int64)CRVectors.FC[1] << 12) - (int32)((uint32)(int32)IR2 << 12))) >> sf;
MAC[3] = A_MV(2, ((int64)((uint64)(int64)CRVectors.FC[2] << 12) - (int32)((uint32)(int32)IR3 << 12))) >> sf;
MAC[1] = A_MV(0, ((int64)((uint64)(int64)IR1 << 12) + IR0 * Lm_B(0, MAC[1], FALSE)) >> sf);
MAC[2] = A_MV(1, ((int64)((uint64)(int64)IR2 << 12) + IR0 * Lm_B(1, MAC[2], FALSE)) >> sf);
MAC[3] = A_MV(2, ((int64)((uint64)(int64)IR3 << 12) + IR0 * Lm_B(2, MAC[3], FALSE)) >> sf);
MAC_to_IR(lm);
MAC_to_RGB_FIFO();
return(8);
}
static INLINE void NormColorDepthCue(uint32 v, uint32 sf, int lm)
{
int16 tmp_vector[3];
MultiplyMatrixByVector(&Matrices.Light, Vectors[v], CRVectors.Null, sf, lm);
tmp_vector[0] = IR1; tmp_vector[1] = IR2; tmp_vector[2] = IR3;
MultiplyMatrixByVector(&Matrices.Color, tmp_vector, CRVectors.B, sf, lm);
DepthCue(TRUE, FALSE, sf, lm);
}
static int32 NCDS(uint32 instr)
{
DECODE_FIELDS;
NormColorDepthCue(0, sf, lm);
return(19);
}
static int32 NCDT(uint32 instr)
{
int i;
DECODE_FIELDS;
for(i = 0; i < 3; i++)
{
NormColorDepthCue(i, sf, lm);
}
return(44);
}
static int32 CC(uint32 instr)
{
DECODE_FIELDS;
int16 tmp_vector[3];
tmp_vector[0] = IR1; tmp_vector[1] = IR2; tmp_vector[2] = IR3;
MultiplyMatrixByVector(&Matrices.Color, tmp_vector, CRVectors.B, sf, lm);
MAC[1] = ((RGB.R << 4) * IR1) >> sf;
MAC[2] = ((RGB.G << 4) * IR2) >> sf;
MAC[3] = ((RGB.B << 4) * IR3) >> sf;
MAC_to_IR(lm);
MAC_to_RGB_FIFO();
return(11);
}
static int32 CDP(uint32 instr)
{
DECODE_FIELDS;
int16 tmp_vector[3];
tmp_vector[0] = IR1; tmp_vector[1] = IR2; tmp_vector[2] = IR3;
MultiplyMatrixByVector(&Matrices.Color, tmp_vector, CRVectors.B, sf, lm);
DepthCue(TRUE, FALSE, sf, lm);
return(13);
}
static int32 NCLIP(uint32 instr)
{
DECODE_FIELDS;
MAC[0] = F( (int64)(XY_FIFO[0].X * (XY_FIFO[1].Y - XY_FIFO[2].Y)) + (XY_FIFO[1].X * (XY_FIFO[2].Y - XY_FIFO[0].Y)) + (XY_FIFO[2].X * (XY_FIFO[0].Y - XY_FIFO[1].Y))
);
return(8);
}
static int32 AVSZ3(uint32 instr)
{
DECODE_FIELDS;
MAC[0] = F(((int64)ZSF3 * (Z_FIFO[1] + Z_FIFO[2] + Z_FIFO[3])));
OTZ = Lm_D(MAC[0] >> 12, FALSE);
return(5);
}
static int32 AVSZ4(uint32 instr)
{
DECODE_FIELDS;
MAC[0] = F(((int64)ZSF4 * (Z_FIFO[0] + Z_FIFO[1] + Z_FIFO[2] + Z_FIFO[3])));
OTZ = Lm_D(MAC[0] >> 12, FALSE);
return(5);
}
// -32768 * -32768 - 32767 * -32768 = 2147450880
// (2 ^ 31) - 1 = 2147483647
static int32 OP(uint32 instr)
{
DECODE_FIELDS;
MAC[1] = ((Matrices.Rot.MX[1][1] * IR3) - (Matrices.Rot.MX[2][2] * IR2)) >> sf;
MAC[2] = ((Matrices.Rot.MX[2][2] * IR1) - (Matrices.Rot.MX[0][0] * IR3)) >> sf;
MAC[3] = ((Matrices.Rot.MX[0][0] * IR2) - (Matrices.Rot.MX[1][1] * IR1)) >> sf;
MAC_to_IR(lm);
return(6);
}
static int32 GPF(uint32 instr)
{
DECODE_FIELDS;
MAC[1] = (IR0 * IR1) >> sf;
MAC[2] = (IR0 * IR2) >> sf;
MAC[3] = (IR0 * IR3) >> sf;
MAC_to_IR(lm);
MAC_to_RGB_FIFO();
return(5);
}
static int32 GPL(uint32 instr)
{
DECODE_FIELDS;
MAC[1] = A_MV(0, (int64)((uint64)(int64)MAC[1] << sf) + (IR0 * IR1)) >> sf;
MAC[2] = A_MV(1, (int64)((uint64)(int64)MAC[2] << sf) + (IR0 * IR2)) >> sf;
MAC[3] = A_MV(2, (int64)((uint64)(int64)MAC[3] << sf) + (IR0 * IR3)) >> sf;
MAC_to_IR(lm);
MAC_to_RGB_FIFO();
return(5);
}
/*
---------------------------------------------------------------------------------------------
| 24 23 22 21 20 | 19 | 18 17 | 16 15 | 14 13 | 12 11 | 10 | 9 8 7 6 | 5 4 3 2 1 0 |
|-------------------------------------------------------------------------------------------|
| (unused) | sf | mx | v | cv |(unused)| lm | (unused) | opcode |
---------------------------------------------------------------------------------------------
(unused) = unused, ignored
sf = shift 12
mx = matrix selection
v = source vector
cv = add vector(translation/back/far color(bugged)/none)
(unused) = unused, ignored
lm = limit negative results to 0
(unused) = unused, ignored
opcode = operation code
*/
int32 GTE_Instruction(uint32 instr)
{
const unsigned code = instr & 0x3F;
int32 ret = 1;
FLAGS = 0;
switch(code)
{
default:
#ifndef PSXDEV_GTE_TESTING
PSX_WARNING("[GTE] Unknown instruction code: 0x%02x", code);
#endif
break;
case 0x00: // alternate?
case 0x01:
ret = RTPS(instr);
break;
/*
case 0x02: // UNSTABLE?
break;
case 0x03: // UNSTABLE?
break;
case 0x04: // Probably simple with v,cv,sf,mx,lm ignored. Same calculation as 0x3B?
break;
case 0x05: // UNSTABLE?
break;
*/
case 0x06:
ret = NCLIP(instr);
break;
/*
case 0x07: // UNSTABLE?
break;
case 0x08: // UNSTABLE?
break;
case 0x09: // UNSTABLE?
break;
case 0x0A: // UNSTABLE?
break;
case 0x0B: // UNSTABLE?
break;
*/
case 0x0C:
ret = OP(instr);
break;
/*
case 0x0D: // UNSTABLE?
break;
case 0x0E: // UNSTABLE?
break;
case 0x0F: // UNSTABLE?
break;
*/
case 0x10:
ret = DPCS(instr);
break;
case 0x11:
ret = INTPL(instr);
break;
case 0x12:
ret = MVMVA(instr);
break;
case 0x13:
ret = NCDS(instr);
break;
case 0x14:
ret = CDP(instr);
break;
/*
case 0x15: // does one push on RGB FIFO, what else...
break;
*/
case 0x16:
ret = NCDT(instr);
break;
/*
case 0x17: // PARTIALLY UNSTABLE(depending on sf or v or cv or mx or lm???), similar behavior under some conditions to 0x16?
break;
case 0x18:
break;
case 0x19:
break;
*/
case 0x1A: // Alternate for 0x29?
ret = DCPL(instr);
break;
case 0x1B:
ret = NCCS(instr);
break;
case 0x1C:
ret = CC(instr);
break;
/*
case 0x1D:
break;
*/
case 0x1E:
ret = NCS(instr);
break;
/*
case 0x1F:
break;
*/
case 0x20:
ret = NCT(instr);
break;
/*
case 0x21:
break;
case 0x22: // UNSTABLE?
break;
case 0x23:
break;
case 0x24:
break;
case 0x25:
break;
case 0x26:
break;
case 0x27:
break;
*/
case 0x28:
ret = SQR(instr);
break;
case 0x29:
ret = DCPL(instr);
break;
case 0x2A:
ret = DPCT(instr);
break;
/*
case 0x2B:
break;
case 0x2C:
break;
*/
case 0x2D:
ret = AVSZ3(instr);
break;
case 0x2E:
ret = AVSZ4(instr);
break;
/*
case 0x2F: // UNSTABLE?
break;
*/
case 0x30:
ret = RTPT(instr);
break;
/*
case 0x31: // UNSTABLE?
break;
case 0x32: // UNSTABLE?
break;
case 0x33: // UNSTABLE?
break;
case 0x34: // UNSTABLE?
break;
case 0x35: // UNSTABLE?
break;
case 0x36: // UNSTABLE?
break;
case 0x37: // UNSTABLE?
break;
case 0x38:
break;
case 0x39: // Probably simple with v,cv,sf,mx,lm ignored.
break;
case 0x3A: // Probably simple with v,cv,sf,mx,lm ignored.
break;
case 0x3B: // Probably simple with v,cv,sf,mx,lm ignored. Same calculation as 0x04?
break;
case 0x3C: // UNSTABLE?
break;
*/
case 0x3D:
ret = GPF(instr);
break;
case 0x3E:
ret = GPL(instr);
break;
case 0x3F:
ret = NCCT(instr);
break;
}
if(FLAGS & 0x7f87e000)
FLAGS |= 1 << 31;
CR[31] = FLAGS;
return(ret - 1);
}
void GTE_SyncState(bool isReader, EW::NewState *ns)
{
NSS(CR);
NSS(FLAGS);
NSS(Matrices);
NSS(CRVectors);
NSS(OFX);
NSS(OFY);
NSS(H);
NSS(DQA);
NSS(DQB);
NSS(ZSF3);
NSS(ZSF4);
NSS(Vectors);
NSS(RGB);
NSS(OTZ);
NSS(IR);
NSS(XY_FIFO);
NSS(Z_FIFO);
NSS(RGB_FIFO);
NSS(MAC);
NSS(LZCS);
NSS(LZCR);
NSS(Reg23);
}
#ifndef PSXDEV_GTE_TESTING
}
#endif
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