mirror of
https://github.com/RetroDECK/Duckstation.git
synced 2024-11-27 08:05:41 +00:00
1911 lines
44 KiB
C++
1911 lines
44 KiB
C++
/***************************************************************************
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* Original copyright notice from PGXP code from Beetle PSX. *
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* Copyright (C) 2016 by iCatButler *
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* *
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* This program is free software; you can redistribute it and/or modify *
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* it under the terms of the GNU General Public License as published by *
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* the Free Software Foundation; either version 2 of the License, or *
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* (at your option) any later version. *
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* *
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* This program is distributed in the hope that it will be useful, *
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* but WITHOUT ANY WARRANTY; without even the implied warranty of *
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
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* 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 *
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* along with this program; if not, write to the *
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* Free Software Foundation, Inc., *
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. *
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***************************************************************************/
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#include "pgxp.h"
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#include "settings.h"
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#include <climits>
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#include <cmath>
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namespace PGXP {
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// pgxp_types.h
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typedef struct PGXP_value_Tag
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{
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float x;
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float y;
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float z;
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union
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{
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unsigned int flags;
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unsigned char compFlags[4];
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unsigned short halfFlags[2];
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};
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unsigned int count;
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unsigned int value;
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unsigned short gFlags;
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unsigned char lFlags;
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unsigned char hFlags;
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} PGXP_value;
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// pgxp_value.h
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typedef union
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{
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struct
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{
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u8 l, h, h2, h3;
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} b;
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struct
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{
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u16 l, h;
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} w;
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struct
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{
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s8 l, h, h2, h3;
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} sb;
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struct
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{
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s16 l, h;
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} sw;
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u32 d;
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s32 sd;
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} psx_value;
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typedef enum
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{
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UNINITIALISED = 0,
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INVALID_PSX_VALUE = 1,
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INVALID_ADDRESS = 2,
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INVALID_BITWISE_OP = 3,
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DIVIDE_BY_ZERO = 4,
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INVALID_8BIT_LOAD = 5,
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INVALID_8BIT_STORE = 6
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} PGXP_error_states;
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typedef enum
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{
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VALID_HALF = (1 << 0)
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} PGXP_half_flags;
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#define NONE 0
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#define ALL 0xFFFFFFFF
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#define VALID 1
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#define VALID_0 (VALID << 0)
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#define VALID_1 (VALID << 8)
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#define VALID_2 (VALID << 16)
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#define VALID_3 (VALID << 24)
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#define VALID_01 (VALID_0 | VALID_1)
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#define VALID_012 (VALID_0 | VALID_1 | VALID_2)
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#define VALID_ALL (VALID_0 | VALID_1 | VALID_2 | VALID_3)
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#define INV_VALID_ALL (ALL ^ VALID_ALL)
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static const PGXP_value PGXP_value_invalid_address = {0.f, 0.f, 0.f, {0}, 0, 0, INVALID_ADDRESS, 0, 0};
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static const PGXP_value PGXP_value_zero = {0.f, 0.f, 0.f, {0}, 0, VALID_ALL, 0, 0, 0};
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static void MakeValid(PGXP_value* pV, u32 psxV);
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static void Validate(PGXP_value* pV, u32 psxV);
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static void MaskValidate(PGXP_value* pV, u32 psxV, u32 mask, u32 validMask);
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static double f16Sign(double in);
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static double f16Unsign(double in);
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static double f16Overflow(double in);
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typedef union
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{
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struct
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{
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s16 x;
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s16 y;
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};
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struct
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{
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u16 ux;
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u16 uy;
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};
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u32 word;
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} low_value;
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// pgxp_mem.h
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static u32 PGXP_ConvertAddress(u32 addr);
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static PGXP_value* GetPtr(u32 addr);
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static PGXP_value* ReadMem(u32 addr);
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static void ValidateAndCopyMem(PGXP_value* dest, u32 addr, u32 value);
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static void ValidateAndCopyMem16(PGXP_value* dest, u32 addr, u32 value, int sign);
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static void WriteMem(PGXP_value* value, u32 addr);
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static void WriteMem16(PGXP_value* src, u32 addr);
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// pgxp_gpu.h
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enum : u32
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{
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VERTEX_CACHE_WIDTH = 0x800 * 2,
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VERTEX_CACHE_HEIGHT = 0x800 * 2,
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VERTEX_CACHE_SIZE = VERTEX_CACHE_WIDTH * VERTEX_CACHE_HEIGHT,
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PGXP_MEM_SIZE = 3 * 2048 * 1024 / 4 // mirror 2MB in 32-bit words * 3
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};
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static PGXP_value* Mem = nullptr;
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const unsigned int mode_init = 0;
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const unsigned int mode_write = 1;
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const unsigned int mode_read = 2;
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const unsigned int mode_fail = 3;
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unsigned int baseID = 0;
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unsigned int lastID = 0;
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unsigned int cacheMode = 0;
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static PGXP_value* vertexCache = nullptr;
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void PGXP_CacheVertex(short sx, short sy, const PGXP_value* _pVertex);
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// pgxp_gte.h
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static void PGXP_InitGTE();
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// pgxp_cpu.h
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static void PGXP_InitCPU();
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static PGXP_value CPU_reg[34];
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#define CPU_Hi CPU_reg[32]
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#define CPU_Lo CPU_reg[33]
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static PGXP_value CP0_reg[32];
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// pgxp_value.c
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void MakeValid(PGXP_value* pV, u32 psxV)
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{
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psx_value psx;
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psx.d = psxV;
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if (VALID_01 != (pV->flags & VALID_01))
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{
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pV->x = psx.sw.l;
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pV->y = psx.sw.h;
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pV->z = 0.f;
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pV->flags |= VALID_01;
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pV->value = psx.d;
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}
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}
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void ALWAYS_INLINE_RELEASE Validate(PGXP_value* pV, u32 psxV)
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{
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// assume pV is not NULL
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pV->flags &= (pV->value == psxV) ? ALL : INV_VALID_ALL;
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}
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void ALWAYS_INLINE_RELEASE MaskValidate(PGXP_value* pV, u32 psxV, u32 mask, u32 validMask)
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{
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// assume pV is not NULL
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pV->flags &= ((pV->value & mask) == (psxV & mask)) ? ALL : (ALL ^ (validMask));
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}
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double ALWAYS_INLINE_RELEASE f16Sign(double in)
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{
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u32 s = (u32)(in * (double)((u32)1 << 16));
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return ((double)*((s32*)&s)) / (double)((s32)1 << 16);
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}
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double ALWAYS_INLINE_RELEASE f16Unsign(double in)
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{
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return (in >= 0) ? in : ((double)in + (double)USHRT_MAX + 1);
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}
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double ALWAYS_INLINE_RELEASE f16Overflow(double in)
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{
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double out = 0;
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s64 v = ((s64)in) >> 16;
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out = (double)v;
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return out;
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}
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// pgxp_mem.c
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static void PGXP_InitMem();
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static const u32 UserMemOffset = 0;
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static const u32 ScratchOffset = 2048 * 1024 / 4;
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static const u32 RegisterOffset = 2 * 2048 * 1024 / 4;
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static const u32 InvalidAddress = 3 * 2048 * 1024 / 4;
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void PGXP_InitMem()
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{
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if (!Mem)
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{
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Mem = static_cast<PGXP_value*>(std::calloc(PGXP_MEM_SIZE, sizeof(PGXP_value)));
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if (!Mem)
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{
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std::fprintf(stderr, "Failed to allocate PGXP memory\n");
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std::abort();
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}
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}
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else
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{
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std::memset(Mem, 0, sizeof(PGXP_value) * PGXP_MEM_SIZE);
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}
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}
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u32 PGXP_ConvertAddress(u32 addr)
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{
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u32 paddr = addr;
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switch (paddr >> 24)
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{
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case 0x80:
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case 0xa0:
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case 0x00:
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// RAM further mirrored over 8MB
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paddr = ((paddr & 0x7FFFFF) % 0x200000) >> 2;
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paddr = UserMemOffset + paddr;
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break;
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default:
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if ((paddr >> 20) == 0x1f8)
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{
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if (paddr >= 0x1f801000)
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{
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// paddr = ((paddr & 0xFFFF) - 0x1000);
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// paddr = (paddr % 0x2000) >> 2;
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paddr = ((paddr & 0xFFFF) - 0x1000) >> 2;
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paddr = RegisterOffset + paddr;
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break;
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}
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else
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{
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// paddr = ((paddr & 0xFFF) % 0x400) >> 2;
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paddr = (paddr & 0x3FF) >> 2;
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paddr = ScratchOffset + paddr;
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break;
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}
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}
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paddr = InvalidAddress;
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break;
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}
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#ifdef GTE_LOG
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// GTE_LOG("PGXP_Read %x [%x] |", addr, paddr);
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#endif
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return paddr;
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}
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ALWAYS_INLINE_RELEASE PGXP_value* GetPtr(u32 addr)
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{
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addr = PGXP_ConvertAddress(addr);
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if (addr != InvalidAddress)
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return &Mem[addr];
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return NULL;
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}
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ALWAYS_INLINE_RELEASE PGXP_value* ReadMem(u32 addr)
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{
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return GetPtr(addr);
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}
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ALWAYS_INLINE_RELEASE void ValidateAndCopyMem(PGXP_value* dest, u32 addr, u32 value)
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{
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PGXP_value* pMem = GetPtr(addr);
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if (pMem != NULL)
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{
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Validate(pMem, value);
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*dest = *pMem;
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return;
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}
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*dest = PGXP_value_invalid_address;
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}
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void ValidateAndCopyMem16(PGXP_value* dest, u32 addr, u32 value, int sign)
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{
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u32 validMask = 0;
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psx_value val, mask;
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PGXP_value* pMem = GetPtr(addr);
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if (pMem != NULL)
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{
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mask.d = val.d = 0;
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// determine if high or low word
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if ((addr % 4) == 2)
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{
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val.w.h = static_cast<u16>(value);
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mask.w.h = 0xFFFF;
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validMask = VALID_1;
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}
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else
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{
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val.w.l = static_cast<u16>(value);
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mask.w.l = 0xFFFF;
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validMask = VALID_0;
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}
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// validate and copy whole value
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MaskValidate(pMem, val.d, mask.d, validMask);
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*dest = *pMem;
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// if high word then shift
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if ((addr % 4) == 2)
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{
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dest->x = dest->y;
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dest->lFlags = dest->hFlags;
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dest->compFlags[0] = dest->compFlags[1];
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}
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// truncate value
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dest->y = (dest->x < 0) ? -1.f * sign : 0.f; // 0.f;
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dest->hFlags = 0;
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dest->value = value;
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dest->compFlags[1] = VALID; // iCB: High word is valid, just 0
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return;
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}
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*dest = PGXP_value_invalid_address;
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}
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ALWAYS_INLINE_RELEASE void WriteMem(PGXP_value* value, u32 addr)
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{
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PGXP_value* pMem = GetPtr(addr);
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if (pMem)
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*pMem = *value;
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}
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void WriteMem16(PGXP_value* src, u32 addr)
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{
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PGXP_value* dest = GetPtr(addr);
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psx_value* pVal = NULL;
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if (dest)
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{
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pVal = (psx_value*)&dest->value;
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// determine if high or low word
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if ((addr % 4) == 2)
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{
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dest->y = src->x;
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dest->hFlags = src->lFlags;
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dest->compFlags[1] = src->compFlags[0];
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pVal->w.h = (u16)src->value;
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}
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else
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{
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dest->x = src->x;
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dest->lFlags = src->lFlags;
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dest->compFlags[0] = src->compFlags[0];
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pVal->w.l = (u16)src->value;
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}
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// overwrite z/w if valid
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if (src->compFlags[2] == VALID)
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{
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dest->z = src->z;
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dest->compFlags[2] = src->compFlags[2];
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}
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// dest->valid = dest->valid && src->valid;
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dest->gFlags |= src->gFlags; // inherit flags from both values (?)
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}
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}
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// pgxp_main.c
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void Initialize()
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{
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PGXP_InitMem();
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PGXP_InitCPU();
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PGXP_InitGTE();
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}
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void Shutdown()
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{
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cacheMode = mode_init;
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if (vertexCache)
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{
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std::free(vertexCache);
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vertexCache = nullptr;
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}
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if (Mem)
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{
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std::free(Mem);
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Mem = nullptr;
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}
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}
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// pgxp_gte.c
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// GTE registers
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static PGXP_value GTE_data_reg[32];
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static PGXP_value GTE_ctrl_reg[32];
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void PGXP_InitGTE()
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{
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memset(GTE_data_reg, 0, sizeof(GTE_data_reg));
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memset(GTE_ctrl_reg, 0, sizeof(GTE_ctrl_reg));
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}
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// Instruction register decoding
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#define op(_instr) (_instr >> 26) // The op part of the instruction register
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#define func(_instr) ((_instr)&0x3F) // The funct part of the instruction register
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#define sa(_instr) ((_instr >> 6) & 0x1F) // The sa part of the instruction register
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#define rd(_instr) ((_instr >> 11) & 0x1F) // The rd part of the instruction register
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#define rt(_instr) ((_instr >> 16) & 0x1F) // The rt part of the instruction register
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#define rs(_instr) ((_instr >> 21) & 0x1F) // The rs part of the instruction register
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#define imm(_instr) (_instr & 0xFFFF) // The immediate part of the instruction register
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#define SX0 (GTE_data_reg[12].x)
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#define SY0 (GTE_data_reg[12].y)
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#define SX1 (GTE_data_reg[13].x)
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#define SY1 (GTE_data_reg[13].y)
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#define SX2 (GTE_data_reg[14].x)
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#define SY2 (GTE_data_reg[14].y)
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#define SXY0 (GTE_data_reg[12])
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#define SXY1 (GTE_data_reg[13])
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#define SXY2 (GTE_data_reg[14])
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#define SXYP (GTE_data_reg[15])
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void GTE_PushSXYZ2f(float _x, float _y, float _z, unsigned int _v)
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{
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static unsigned int uCount = 0;
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low_value temp;
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// push values down FIFO
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SXY0 = SXY1;
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SXY1 = SXY2;
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SXY2.x = _x;
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SXY2.y = _y;
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SXY2.z = _z;
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SXY2.value = _v;
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SXY2.flags = VALID_ALL;
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SXY2.count = uCount++;
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// cache value in GPU plugin
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temp.word = _v;
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if (g_settings.gpu_pgxp_vertex_cache)
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PGXP_CacheVertex(temp.x, temp.y, &SXY2);
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else
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PGXP_CacheVertex(0, 0, NULL);
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#ifdef GTE_LOG
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GTE_LOG("PGXP_PUSH (%f, %f) %u %u|", SXY2.x, SXY2.y, SXY2.flags, SXY2.count);
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#endif
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}
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void GTE_PushSXYZ2s(s64 _x, s64 _y, s64 _z, u32 v)
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{
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float fx = (float)(_x) / (float)(1 << 16);
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float fy = (float)(_y) / (float)(1 << 16);
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float fz = (float)(_z);
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// if(Config.PGXP_GTE)
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GTE_PushSXYZ2f(fx, fy, fz, v);
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}
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#define VX(n) (psxRegs.CP2D.p[n << 1].sw.l)
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#define VY(n) (psxRegs.CP2D.p[n << 1].sw.h)
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#define VZ(n) (psxRegs.CP2D.p[(n << 1) + 1].sw.l)
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int GTE_NCLIP_valid(u32 sxy0, u32 sxy1, u32 sxy2)
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{
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Validate(&SXY0, sxy0);
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Validate(&SXY1, sxy1);
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Validate(&SXY2, sxy2);
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if (((SXY0.flags & SXY1.flags & SXY2.flags & VALID_01) == VALID_01)) // && Config.PGXP_GTE && (Config.PGXP_Mode > 0))
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return 1;
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return 0;
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}
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float GTE_NCLIP()
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{
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float nclip = ((SX0 * SY1) + (SX1 * SY2) + (SX2 * SY0) - (SX0 * SY2) - (SX1 * SY0) - (SX2 * SY1));
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// ensure fractional values are not incorrectly rounded to 0
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float nclipAbs = std::abs(nclip);
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if ((0.1f < nclipAbs) && (nclipAbs < 1.f))
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nclip += (nclip < 0.f ? -1 : 1);
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// float AX = SX1 - SX0;
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// float AY = SY1 - SY0;
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// float BX = SX2 - SX0;
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// float BY = SY2 - SY0;
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//// normalise A and B
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// float mA = sqrt((AX*AX) + (AY*AY));
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|
// float mB = sqrt((BX*BX) + (BY*BY));
|
|
|
|
//// calculate AxB to get Z component of C
|
|
// float CZ = ((AX * BY) - (AY * BX)) * (1 << 12);
|
|
|
|
return nclip;
|
|
}
|
|
|
|
static void PGXP_MTC2_int(PGXP_value value, u32 reg)
|
|
{
|
|
switch (reg)
|
|
{
|
|
case 15:
|
|
// push FIFO
|
|
SXY0 = SXY1;
|
|
SXY1 = SXY2;
|
|
SXY2 = value;
|
|
SXYP = SXY2;
|
|
break;
|
|
|
|
case 31:
|
|
return;
|
|
}
|
|
|
|
GTE_data_reg[reg] = value;
|
|
}
|
|
|
|
////////////////////////////////////
|
|
// Data transfer tracking
|
|
////////////////////////////////////
|
|
|
|
void CPU_MFC2(u32 instr, u32 rtVal, u32 rdVal)
|
|
{
|
|
// CPU[Rt] = GTE_D[Rd]
|
|
Validate(>E_data_reg[rd(instr)], rdVal);
|
|
CPU_reg[rt(instr)] = GTE_data_reg[rd(instr)];
|
|
CPU_reg[rt(instr)].value = rtVal;
|
|
}
|
|
|
|
void CPU_MTC2(u32 instr, u32 rdVal, u32 rtVal)
|
|
{
|
|
// GTE_D[Rd] = CPU[Rt]
|
|
Validate(&CPU_reg[rt(instr)], rtVal);
|
|
PGXP_MTC2_int(CPU_reg[rt(instr)], rd(instr));
|
|
GTE_data_reg[rd(instr)].value = rdVal;
|
|
}
|
|
|
|
void CPU_CFC2(u32 instr, u32 rtVal, u32 rdVal)
|
|
{
|
|
// CPU[Rt] = GTE_C[Rd]
|
|
Validate(>E_ctrl_reg[rd(instr)], rdVal);
|
|
CPU_reg[rt(instr)] = GTE_ctrl_reg[rd(instr)];
|
|
CPU_reg[rt(instr)].value = rtVal;
|
|
}
|
|
|
|
void CPU_CTC2(u32 instr, u32 rdVal, u32 rtVal)
|
|
{
|
|
// GTE_C[Rd] = CPU[Rt]
|
|
Validate(&CPU_reg[rt(instr)], rtVal);
|
|
GTE_ctrl_reg[rd(instr)] = CPU_reg[rt(instr)];
|
|
GTE_ctrl_reg[rd(instr)].value = rdVal;
|
|
}
|
|
|
|
////////////////////////////////////
|
|
// Memory Access
|
|
////////////////////////////////////
|
|
void CPU_LWC2(u32 instr, u32 rtVal, u32 addr)
|
|
{
|
|
// GTE_D[Rt] = Mem[addr]
|
|
PGXP_value val;
|
|
ValidateAndCopyMem(&val, addr, rtVal);
|
|
PGXP_MTC2_int(val, rt(instr));
|
|
}
|
|
|
|
void CPU_SWC2(u32 instr, u32 rtVal, u32 addr)
|
|
{
|
|
// Mem[addr] = GTE_D[Rt]
|
|
Validate(>E_data_reg[rt(instr)], rtVal);
|
|
WriteMem(>E_data_reg[rt(instr)], addr);
|
|
}
|
|
|
|
// pgxp_gpu.c
|
|
/////////////////////////////////
|
|
//// Blade_Arma's Vertex Cache (CatBlade?)
|
|
/////////////////////////////////
|
|
unsigned int IsSessionID(unsigned int vertID)
|
|
{
|
|
// No wrapping
|
|
if (lastID >= baseID)
|
|
return (vertID >= baseID);
|
|
|
|
// If vertID is >= baseID it is pre-wrap and in session
|
|
if (vertID >= baseID)
|
|
return 1;
|
|
|
|
// vertID is < baseID, If it is <= lastID it is post-wrap and in session
|
|
if (vertID <= lastID)
|
|
return 1;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void InitPGXPVertexCache()
|
|
{
|
|
if (!vertexCache)
|
|
{
|
|
vertexCache = static_cast<PGXP_value*>(std::calloc(VERTEX_CACHE_SIZE, sizeof(PGXP_value)));
|
|
if (!vertexCache)
|
|
{
|
|
std::fprintf(stderr, "Failed to allocate PGXP vertex cache memory\n");
|
|
std::abort();
|
|
}
|
|
}
|
|
else
|
|
{
|
|
memset(vertexCache, 0x00, VERTEX_CACHE_SIZE * sizeof(PGXP_value));
|
|
}
|
|
}
|
|
|
|
void PGXP_CacheVertex(short sx, short sy, const PGXP_value* _pVertex)
|
|
{
|
|
const PGXP_value* pNewVertex = (const PGXP_value*)_pVertex;
|
|
PGXP_value* pOldVertex = NULL;
|
|
|
|
if (!pNewVertex)
|
|
{
|
|
cacheMode = mode_fail;
|
|
return;
|
|
}
|
|
|
|
// Initialise cache on first use
|
|
if (!vertexCache)
|
|
InitPGXPVertexCache();
|
|
|
|
// if (bGteAccuracy)
|
|
{
|
|
if (cacheMode != mode_write)
|
|
{
|
|
// First vertex of write session (frame?)
|
|
cacheMode = mode_write;
|
|
baseID = pNewVertex->count;
|
|
}
|
|
|
|
lastID = pNewVertex->count;
|
|
|
|
if (sx >= -0x800 && sx <= 0x7ff && sy >= -0x800 && sy <= 0x7ff)
|
|
{
|
|
pOldVertex = &vertexCache[(sy + 0x800) * VERTEX_CACHE_WIDTH + (sx + 0x800)];
|
|
|
|
// To avoid ambiguity there can only be one valid entry per-session
|
|
if (0) //(IsSessionID(pOldVertex->count) && (pOldVertex->value == pNewVertex->value))
|
|
{
|
|
// check to ensure this isn't identical
|
|
if ((fabsf(pOldVertex->x - pNewVertex->x) > 0.1f) || (fabsf(pOldVertex->y - pNewVertex->y) > 0.1f) ||
|
|
(fabsf(pOldVertex->z - pNewVertex->z) > 0.1f))
|
|
{
|
|
*pOldVertex = *pNewVertex;
|
|
pOldVertex->gFlags = 5;
|
|
return;
|
|
}
|
|
}
|
|
|
|
// Write vertex into cache
|
|
*pOldVertex = *pNewVertex;
|
|
pOldVertex->gFlags = 1;
|
|
}
|
|
}
|
|
}
|
|
|
|
PGXP_value* PGXP_GetCachedVertex(short sx, short sy)
|
|
{
|
|
if (g_settings.gpu_pgxp_vertex_cache)
|
|
{
|
|
if (cacheMode != mode_read)
|
|
{
|
|
if (cacheMode == mode_fail)
|
|
return NULL;
|
|
|
|
// First vertex of read session (frame?)
|
|
cacheMode = mode_read;
|
|
}
|
|
|
|
// Initialise cache on first use
|
|
if (!vertexCache)
|
|
InitPGXPVertexCache();
|
|
|
|
if (sx >= -0x800 && sx <= 0x7ff && sy >= -0x800 && sy <= 0x7ff)
|
|
{
|
|
// Return pointer to cache entry
|
|
return &vertexCache[(sy + 0x800) * VERTEX_CACHE_WIDTH + (sx + 0x800)];
|
|
}
|
|
}
|
|
|
|
return NULL;
|
|
}
|
|
|
|
static ALWAYS_INLINE_RELEASE float TruncateVertexPosition(float p)
|
|
{
|
|
const s32 int_part = static_cast<s32>(p);
|
|
const float int_part_f = static_cast<float>(int_part);
|
|
return static_cast<float>(static_cast<s16>(int_part << 5) >> 5) + (p - int_part_f);
|
|
}
|
|
|
|
static ALWAYS_INLINE_RELEASE bool IsWithinTolerance(float precise_x, float precise_y, int int_x, int int_y)
|
|
{
|
|
const float tolerance = g_settings.gpu_pgxp_tolerance;
|
|
if (tolerance < 0.0f)
|
|
return true;
|
|
|
|
return (std::abs(precise_x - static_cast<float>(int_x)) <= tolerance &&
|
|
std::abs(precise_y - static_cast<float>(int_y)) <= tolerance);
|
|
}
|
|
|
|
bool GetPreciseVertex(u32 addr, u32 value, int x, int y, int xOffs, int yOffs, float* out_x, float* out_y, float* out_w)
|
|
{
|
|
const PGXP_value* vert = ReadMem(addr);
|
|
if (vert && ((vert->flags & VALID_01) == VALID_01) && (vert->value == value))
|
|
{
|
|
// There is a value here with valid X and Y coordinates
|
|
*out_x = TruncateVertexPosition(vert->x) + static_cast<float>(xOffs);
|
|
*out_y = TruncateVertexPosition(vert->y) + static_cast<float>(yOffs);
|
|
*out_w = vert->z / 32768.0f;
|
|
if (IsWithinTolerance(*out_x, *out_y, x, y))
|
|
{
|
|
// check validity of z component
|
|
return ((vert->flags & VALID_2) == VALID_2);
|
|
}
|
|
}
|
|
else
|
|
{
|
|
const short psx_x = (short)(value & 0xFFFFu);
|
|
const short psx_y = (short)(value >> 16);
|
|
|
|
// Look in cache for valid vertex
|
|
vert = PGXP_GetCachedVertex(psx_x, psx_y);
|
|
if ((vert) && /*(IsSessionID(vert->count)) &&*/ (vert->gFlags == 1))
|
|
{
|
|
// a value is found, it is from the current session and is unambiguous (there was only one value recorded at that
|
|
// position)
|
|
*out_x = TruncateVertexPosition(vert->x) + static_cast<float>(xOffs);
|
|
*out_y = TruncateVertexPosition(vert->y) + static_cast<float>(yOffs);
|
|
*out_w = vert->z / 32768.0f;
|
|
|
|
if (IsWithinTolerance(*out_x, *out_y, x, y))
|
|
{
|
|
return false; // iCB: Getting the wrong w component causes too great an error when using perspective correction
|
|
// so disable it
|
|
}
|
|
}
|
|
}
|
|
|
|
// no valid value can be found anywhere, use the native PSX data
|
|
*out_x = static_cast<float>(x);
|
|
*out_y = static_cast<float>(y);
|
|
*out_w = 1.0f;
|
|
return false;
|
|
}
|
|
|
|
// pgxp_cpu.c
|
|
|
|
// Instruction register decoding
|
|
#define op(_instr) (_instr >> 26) // The op part of the instruction register
|
|
#define func(_instr) ((_instr)&0x3F) // The funct part of the instruction register
|
|
#define sa(_instr) ((_instr >> 6) & 0x1F) // The sa part of the instruction register
|
|
#define rd(_instr) ((_instr >> 11) & 0x1F) // The rd part of the instruction register
|
|
#define rt(_instr) ((_instr >> 16) & 0x1F) // The rt part of the instruction register
|
|
#define rs(_instr) ((_instr >> 21) & 0x1F) // The rs part of the instruction register
|
|
#define imm(_instr) (_instr & 0xFFFF) // The immediate part of the instruction register
|
|
#define imm_sext(_instr) \
|
|
static_cast<s32>(static_cast<s16>(_instr & 0xFFFF)) // The immediate part of the instruction register
|
|
|
|
void PGXP_InitCPU()
|
|
{
|
|
memset(CPU_reg, 0, sizeof(CPU_reg));
|
|
memset(CP0_reg, 0, sizeof(CP0_reg));
|
|
}
|
|
|
|
// invalidate register (invalid 8 bit read)
|
|
static void InvalidLoad(u32 addr, u32 code, u32 value)
|
|
{
|
|
u32 reg = ((code >> 16) & 0x1F); // The rt part of the instruction register
|
|
PGXP_value* pD = NULL;
|
|
PGXP_value p;
|
|
|
|
p.x = p.y = -1337; // default values
|
|
|
|
// p.valid = 0;
|
|
// p.count = value;
|
|
pD = ReadMem(addr);
|
|
|
|
if (pD)
|
|
{
|
|
p.count = addr;
|
|
p = *pD;
|
|
}
|
|
else
|
|
{
|
|
p.count = value;
|
|
}
|
|
|
|
p.flags = 0;
|
|
|
|
// invalidate register
|
|
CPU_reg[reg] = p;
|
|
}
|
|
|
|
// invalidate memory address (invalid 8 bit write)
|
|
static void InvalidStore(u32 addr, u32 code, u32 value)
|
|
{
|
|
u32 reg = ((code >> 16) & 0x1F); // The rt part of the instruction register
|
|
PGXP_value* pD = NULL;
|
|
PGXP_value p;
|
|
|
|
pD = ReadMem(addr);
|
|
|
|
p.x = p.y = -2337;
|
|
|
|
if (pD)
|
|
p = *pD;
|
|
|
|
p.flags = 0;
|
|
p.count = (reg * 1000) + value;
|
|
|
|
// invalidate memory
|
|
WriteMem(&p, addr);
|
|
}
|
|
|
|
void CPU_LW(u32 instr, u32 rtVal, u32 addr)
|
|
{
|
|
// Rt = Mem[Rs + Im]
|
|
ValidateAndCopyMem(&CPU_reg[rt(instr)], addr, rtVal);
|
|
}
|
|
|
|
void CPU_LBx(u32 instr, u32 rtVal, u32 addr)
|
|
{
|
|
InvalidLoad(addr, instr, 116);
|
|
}
|
|
|
|
void CPU_LHx(u32 instr, u32 rtVal, u32 addr)
|
|
{
|
|
// Rt = Mem[Rs + Im] (sign/zero extended)
|
|
ValidateAndCopyMem16(&CPU_reg[rt(instr)], addr, rtVal, 1);
|
|
}
|
|
|
|
void CPU_SB(u32 instr, u8 rtVal, u32 addr)
|
|
{
|
|
InvalidStore(addr, instr, 208);
|
|
}
|
|
|
|
void CPU_SH(u32 instr, u16 rtVal, u32 addr)
|
|
{
|
|
// validate and copy half value
|
|
MaskValidate(&CPU_reg[rt(instr)], rtVal, 0xFFFF, VALID_0);
|
|
WriteMem16(&CPU_reg[rt(instr)], addr);
|
|
}
|
|
|
|
void CPU_SW(u32 instr, u32 rtVal, u32 addr)
|
|
{
|
|
// Mem[Rs + Im] = Rt
|
|
Validate(&CPU_reg[rt(instr)], rtVal);
|
|
WriteMem(&CPU_reg[rt(instr)], addr);
|
|
}
|
|
|
|
void CPU_MOVE(u32 rd_and_rs, u32 rsVal)
|
|
{
|
|
const u32 Rs = (rd_and_rs & 0xFFu);
|
|
Validate(&CPU_reg[Rs], rsVal);
|
|
CPU_reg[(rd_and_rs >> 8)] = CPU_reg[Rs];
|
|
}
|
|
|
|
void CPU_ADDI(u32 instr, u32 rsVal)
|
|
{
|
|
// Rt = Rs + Imm (signed)
|
|
psx_value tempImm;
|
|
PGXP_value ret;
|
|
|
|
Validate(&CPU_reg[rs(instr)], rsVal);
|
|
ret = CPU_reg[rs(instr)];
|
|
tempImm.d = imm(instr);
|
|
tempImm.sd = (tempImm.sd << 16) >> 16; // sign extend
|
|
|
|
if (tempImm.d != 0)
|
|
{
|
|
ret.x = (float)f16Unsign(ret.x);
|
|
ret.x += (float)tempImm.w.l;
|
|
|
|
// carry on over/underflow
|
|
float of = (ret.x > USHRT_MAX) ? 1.f : (ret.x < 0) ? -1.f : 0.f;
|
|
ret.x = (float)f16Sign(ret.x);
|
|
// ret.x -= of * (USHRT_MAX + 1);
|
|
ret.y += tempImm.sw.h + of;
|
|
|
|
// truncate on overflow/underflow
|
|
ret.y += (ret.y > SHRT_MAX) ? -(USHRT_MAX + 1) : (ret.y < SHRT_MIN) ? USHRT_MAX + 1 : 0.f;
|
|
}
|
|
|
|
CPU_reg[rt(instr)] = ret;
|
|
CPU_reg[rt(instr)].value = rsVal + imm_sext(instr);
|
|
}
|
|
|
|
void CPU_ANDI(u32 instr, u32 rsVal)
|
|
{
|
|
// Rt = Rs & Imm
|
|
const u32 rtVal = rsVal & imm(instr);
|
|
psx_value vRt;
|
|
PGXP_value ret;
|
|
|
|
Validate(&CPU_reg[rs(instr)], rsVal);
|
|
ret = CPU_reg[rs(instr)];
|
|
|
|
vRt.d = rtVal;
|
|
|
|
ret.y = 0.f; // remove upper 16-bits
|
|
|
|
switch (imm(instr))
|
|
{
|
|
case 0:
|
|
// if 0 then x == 0
|
|
ret.x = 0.f;
|
|
break;
|
|
case 0xFFFF:
|
|
// if saturated then x == x
|
|
break;
|
|
default:
|
|
// otherwise x is low precision value
|
|
ret.x = vRt.sw.l;
|
|
ret.flags |= VALID_0;
|
|
}
|
|
|
|
ret.flags |= VALID_1;
|
|
|
|
CPU_reg[rt(instr)] = ret;
|
|
CPU_reg[rt(instr)].value = rtVal;
|
|
}
|
|
|
|
void CPU_ORI(u32 instr, u32 rsVal)
|
|
{
|
|
// Rt = Rs | Imm
|
|
const u32 rtVal = rsVal | imm(instr);
|
|
psx_value vRt;
|
|
PGXP_value ret;
|
|
|
|
Validate(&CPU_reg[rs(instr)], rsVal);
|
|
ret = CPU_reg[rs(instr)];
|
|
|
|
vRt.d = rtVal;
|
|
|
|
switch (imm(instr))
|
|
{
|
|
case 0:
|
|
// if 0 then x == x
|
|
break;
|
|
default:
|
|
// otherwise x is low precision value
|
|
ret.x = vRt.sw.l;
|
|
ret.flags |= VALID_0;
|
|
}
|
|
|
|
ret.value = rtVal;
|
|
CPU_reg[rt(instr)] = ret;
|
|
}
|
|
|
|
void CPU_XORI(u32 instr, u32 rsVal)
|
|
{
|
|
// Rt = Rs ^ Imm
|
|
const u32 rtVal = rsVal ^ imm(instr);
|
|
psx_value vRt;
|
|
PGXP_value ret;
|
|
|
|
Validate(&CPU_reg[rs(instr)], rsVal);
|
|
ret = CPU_reg[rs(instr)];
|
|
|
|
vRt.d = rtVal;
|
|
|
|
switch (imm(instr))
|
|
{
|
|
case 0:
|
|
// if 0 then x == x
|
|
break;
|
|
default:
|
|
// otherwise x is low precision value
|
|
ret.x = vRt.sw.l;
|
|
ret.flags |= VALID_0;
|
|
}
|
|
|
|
ret.value = rtVal;
|
|
CPU_reg[rt(instr)] = ret;
|
|
}
|
|
|
|
void CPU_SLTI(u32 instr, u32 rsVal)
|
|
{
|
|
// Rt = Rs < Imm (signed)
|
|
psx_value tempImm;
|
|
PGXP_value ret;
|
|
|
|
Validate(&CPU_reg[rs(instr)], rsVal);
|
|
ret = CPU_reg[rs(instr)];
|
|
|
|
tempImm.w.h = imm(instr);
|
|
ret.y = 0.f;
|
|
ret.x = (CPU_reg[rs(instr)].x < tempImm.sw.h) ? 1.f : 0.f;
|
|
ret.flags |= VALID_1;
|
|
ret.value = BoolToUInt32(static_cast<s32>(rsVal) < imm_sext(instr));
|
|
|
|
CPU_reg[rt(instr)] = ret;
|
|
}
|
|
|
|
void CPU_SLTIU(u32 instr, u32 rsVal)
|
|
{
|
|
// Rt = Rs < Imm (Unsigned)
|
|
psx_value tempImm;
|
|
PGXP_value ret;
|
|
|
|
Validate(&CPU_reg[rs(instr)], rsVal);
|
|
ret = CPU_reg[rs(instr)];
|
|
|
|
tempImm.w.h = imm(instr);
|
|
ret.y = 0.f;
|
|
ret.x = (f16Unsign(CPU_reg[rs(instr)].x) < tempImm.w.h) ? 1.f : 0.f;
|
|
ret.flags |= VALID_1;
|
|
ret.value = BoolToUInt32(rsVal < imm(instr));
|
|
|
|
CPU_reg[rt(instr)] = ret;
|
|
}
|
|
|
|
////////////////////////////////////
|
|
// Load Upper
|
|
////////////////////////////////////
|
|
void CPU_LUI(u32 instr)
|
|
{
|
|
// Rt = Imm << 16
|
|
CPU_reg[rt(instr)] = PGXP_value_zero;
|
|
CPU_reg[rt(instr)].y = (float)(s16)imm(instr);
|
|
CPU_reg[rt(instr)].hFlags = VALID_HALF;
|
|
CPU_reg[rt(instr)].value = static_cast<u32>(imm(instr)) << 16;
|
|
CPU_reg[rt(instr)].flags = VALID_01;
|
|
}
|
|
|
|
////////////////////////////////////
|
|
// Register Arithmetic
|
|
////////////////////////////////////
|
|
|
|
void CPU_ADD(u32 instr, u32 rsVal, u32 rtVal)
|
|
{
|
|
// Rd = Rs + Rt (signed)
|
|
PGXP_value ret;
|
|
Validate(&CPU_reg[rs(instr)], rsVal);
|
|
Validate(&CPU_reg[rt(instr)], rtVal);
|
|
|
|
if (rtVal != 0)
|
|
{
|
|
// iCB: Only require one valid input
|
|
if (((CPU_reg[rt(instr)].flags & VALID_01) != VALID_01) != ((CPU_reg[rs(instr)].flags & VALID_01) != VALID_01))
|
|
{
|
|
MakeValid(&CPU_reg[rs(instr)], rsVal);
|
|
MakeValid(&CPU_reg[rt(instr)], rtVal);
|
|
}
|
|
|
|
ret = CPU_reg[rs(instr)];
|
|
|
|
ret.x = (float)f16Unsign(ret.x);
|
|
ret.x += (float)f16Unsign(CPU_reg[rt(instr)].x);
|
|
|
|
// carry on over/underflow
|
|
float of = (ret.x > USHRT_MAX) ? 1.f : (ret.x < 0) ? -1.f : 0.f;
|
|
ret.x = (float)f16Sign(ret.x);
|
|
// ret.x -= of * (USHRT_MAX + 1);
|
|
ret.y += CPU_reg[rt(instr)].y + of;
|
|
|
|
// truncate on overflow/underflow
|
|
ret.y += (ret.y > SHRT_MAX) ? -(USHRT_MAX + 1) : (ret.y < SHRT_MIN) ? USHRT_MAX + 1 : 0.f;
|
|
|
|
// TODO: decide which "z/w" component to use
|
|
|
|
ret.halfFlags[0] &= CPU_reg[rt(instr)].halfFlags[0];
|
|
ret.gFlags |= CPU_reg[rt(instr)].gFlags;
|
|
ret.lFlags |= CPU_reg[rt(instr)].lFlags;
|
|
ret.hFlags |= CPU_reg[rt(instr)].hFlags;
|
|
}
|
|
else
|
|
{
|
|
ret = CPU_reg[rs(instr)];
|
|
}
|
|
|
|
ret.value = rsVal + rtVal;
|
|
|
|
CPU_reg[rd(instr)] = ret;
|
|
}
|
|
|
|
void CPU_SUB(u32 instr, u32 rsVal, u32 rtVal)
|
|
{
|
|
// Rd = Rs - Rt (signed)
|
|
PGXP_value ret;
|
|
Validate(&CPU_reg[rs(instr)], rsVal);
|
|
Validate(&CPU_reg[rt(instr)], rtVal);
|
|
|
|
// iCB: Only require one valid input
|
|
if (((CPU_reg[rt(instr)].flags & VALID_01) != VALID_01) != ((CPU_reg[rs(instr)].flags & VALID_01) != VALID_01))
|
|
{
|
|
MakeValid(&CPU_reg[rs(instr)], rsVal);
|
|
MakeValid(&CPU_reg[rt(instr)], rtVal);
|
|
}
|
|
|
|
ret = CPU_reg[rs(instr)];
|
|
|
|
ret.x = (float)f16Unsign(ret.x);
|
|
ret.x -= (float)f16Unsign(CPU_reg[rt(instr)].x);
|
|
|
|
// carry on over/underflow
|
|
float of = (ret.x > USHRT_MAX) ? 1.f : (ret.x < 0) ? -1.f : 0.f;
|
|
ret.x = (float)f16Sign(ret.x);
|
|
// ret.x -= of * (USHRT_MAX + 1);
|
|
ret.y -= CPU_reg[rt(instr)].y - of;
|
|
|
|
// truncate on overflow/underflow
|
|
ret.y += (ret.y > SHRT_MAX) ? -(USHRT_MAX + 1) : (ret.y < SHRT_MIN) ? USHRT_MAX + 1 : 0.f;
|
|
|
|
ret.halfFlags[0] &= CPU_reg[rt(instr)].halfFlags[0];
|
|
ret.gFlags |= CPU_reg[rt(instr)].gFlags;
|
|
ret.lFlags |= CPU_reg[rt(instr)].lFlags;
|
|
ret.hFlags |= CPU_reg[rt(instr)].hFlags;
|
|
|
|
ret.value = rsVal - rtVal;
|
|
|
|
CPU_reg[rd(instr)] = ret;
|
|
}
|
|
|
|
static void CPU_BITWISE(u32 instr, u32 rdVal, u32 rsVal, u32 rtVal)
|
|
{
|
|
// Rd = Rs & Rt
|
|
psx_value vald, vals, valt;
|
|
PGXP_value ret;
|
|
|
|
Validate(&CPU_reg[rs(instr)], rsVal);
|
|
Validate(&CPU_reg[rt(instr)], rtVal);
|
|
|
|
// iCB: Only require one valid input
|
|
if (((CPU_reg[rt(instr)].flags & VALID_01) != VALID_01) != ((CPU_reg[rs(instr)].flags & VALID_01) != VALID_01))
|
|
{
|
|
MakeValid(&CPU_reg[rs(instr)], rsVal);
|
|
MakeValid(&CPU_reg[rt(instr)], rtVal);
|
|
}
|
|
|
|
vald.d = rdVal;
|
|
vals.d = rsVal;
|
|
valt.d = rtVal;
|
|
|
|
// CPU_reg[rd(instr)].valid = CPU_reg[rs(instr)].valid && CPU_reg[rt(instr)].valid;
|
|
ret.flags = VALID_01;
|
|
|
|
if (vald.w.l == 0)
|
|
{
|
|
ret.x = 0.f;
|
|
ret.lFlags = VALID_HALF;
|
|
}
|
|
else if (vald.w.l == vals.w.l)
|
|
{
|
|
ret.x = CPU_reg[rs(instr)].x;
|
|
ret.lFlags = CPU_reg[rs(instr)].lFlags;
|
|
ret.compFlags[0] = CPU_reg[rs(instr)].compFlags[0];
|
|
}
|
|
else if (vald.w.l == valt.w.l)
|
|
{
|
|
ret.x = CPU_reg[rt(instr)].x;
|
|
ret.lFlags = CPU_reg[rt(instr)].lFlags;
|
|
ret.compFlags[0] = CPU_reg[rt(instr)].compFlags[0];
|
|
}
|
|
else
|
|
{
|
|
ret.x = (float)vald.sw.l;
|
|
ret.compFlags[0] = VALID;
|
|
ret.lFlags = 0;
|
|
}
|
|
|
|
if (vald.w.h == 0)
|
|
{
|
|
ret.y = 0.f;
|
|
ret.hFlags = VALID_HALF;
|
|
}
|
|
else if (vald.w.h == vals.w.h)
|
|
{
|
|
ret.y = CPU_reg[rs(instr)].y;
|
|
ret.hFlags = CPU_reg[rs(instr)].hFlags;
|
|
ret.compFlags[1] &= CPU_reg[rs(instr)].compFlags[1];
|
|
}
|
|
else if (vald.w.h == valt.w.h)
|
|
{
|
|
ret.y = CPU_reg[rt(instr)].y;
|
|
ret.hFlags = CPU_reg[rt(instr)].hFlags;
|
|
ret.compFlags[1] &= CPU_reg[rt(instr)].compFlags[1];
|
|
}
|
|
else
|
|
{
|
|
ret.y = (float)vald.sw.h;
|
|
ret.compFlags[1] = VALID;
|
|
ret.hFlags = 0;
|
|
}
|
|
|
|
// iCB Hack: Force validity if even one half is valid
|
|
// if ((ret.hFlags & VALID_HALF) || (ret.lFlags & VALID_HALF))
|
|
// ret.valid = 1;
|
|
// /iCB Hack
|
|
|
|
// Get a valid W
|
|
if ((CPU_reg[rs(instr)].flags & VALID_2) == VALID_2)
|
|
{
|
|
ret.z = CPU_reg[rs(instr)].z;
|
|
ret.compFlags[2] = CPU_reg[rs(instr)].compFlags[2];
|
|
}
|
|
else if ((CPU_reg[rt(instr)].flags & VALID_2) == VALID_2)
|
|
{
|
|
ret.z = CPU_reg[rt(instr)].z;
|
|
ret.compFlags[2] = CPU_reg[rt(instr)].compFlags[2];
|
|
}
|
|
|
|
ret.value = rdVal;
|
|
CPU_reg[rd(instr)] = ret;
|
|
}
|
|
|
|
void CPU_AND_(u32 instr, u32 rsVal, u32 rtVal)
|
|
{
|
|
// Rd = Rs & Rt
|
|
const u32 rdVal = rsVal & rtVal;
|
|
CPU_BITWISE(instr, rdVal, rsVal, rtVal);
|
|
}
|
|
|
|
void CPU_OR_(u32 instr, u32 rsVal, u32 rtVal)
|
|
{
|
|
// Rd = Rs | Rt
|
|
const u32 rdVal = rsVal | rtVal;
|
|
CPU_BITWISE(instr, rdVal, rsVal, rtVal);
|
|
}
|
|
|
|
void CPU_XOR_(u32 instr, u32 rsVal, u32 rtVal)
|
|
{
|
|
// Rd = Rs ^ Rt
|
|
const u32 rdVal = rsVal ^ rtVal;
|
|
CPU_BITWISE(instr, rdVal, rsVal, rtVal);
|
|
}
|
|
|
|
void CPU_NOR(u32 instr, u32 rsVal, u32 rtVal)
|
|
{
|
|
// Rd = Rs NOR Rt
|
|
const u32 rdVal = ~(rsVal | rtVal);
|
|
CPU_BITWISE(instr, rdVal, rsVal, rtVal);
|
|
}
|
|
|
|
void CPU_SLT(u32 instr, u32 rsVal, u32 rtVal)
|
|
{
|
|
// Rd = Rs < Rt (signed)
|
|
PGXP_value ret;
|
|
Validate(&CPU_reg[rs(instr)], rsVal);
|
|
Validate(&CPU_reg[rt(instr)], rtVal);
|
|
|
|
// iCB: Only require one valid input
|
|
if (((CPU_reg[rt(instr)].flags & VALID_01) != VALID_01) != ((CPU_reg[rs(instr)].flags & VALID_01) != VALID_01))
|
|
{
|
|
MakeValid(&CPU_reg[rs(instr)], rsVal);
|
|
MakeValid(&CPU_reg[rt(instr)], rtVal);
|
|
}
|
|
|
|
ret = CPU_reg[rs(instr)];
|
|
ret.y = 0.f;
|
|
ret.compFlags[1] = VALID;
|
|
|
|
ret.x = (CPU_reg[rs(instr)].y < CPU_reg[rt(instr)].y) ?
|
|
1.f :
|
|
(f16Unsign(CPU_reg[rs(instr)].x) < f16Unsign(CPU_reg[rt(instr)].x)) ? 1.f : 0.f;
|
|
|
|
ret.value = BoolToUInt32(static_cast<s32>(rsVal) < static_cast<s32>(rtVal));
|
|
CPU_reg[rd(instr)] = ret;
|
|
}
|
|
|
|
void CPU_SLTU(u32 instr, u32 rsVal, u32 rtVal)
|
|
{
|
|
// Rd = Rs < Rt (unsigned)
|
|
PGXP_value ret;
|
|
Validate(&CPU_reg[rs(instr)], rsVal);
|
|
Validate(&CPU_reg[rt(instr)], rtVal);
|
|
|
|
// iCB: Only require one valid input
|
|
if (((CPU_reg[rt(instr)].flags & VALID_01) != VALID_01) != ((CPU_reg[rs(instr)].flags & VALID_01) != VALID_01))
|
|
{
|
|
MakeValid(&CPU_reg[rs(instr)], rsVal);
|
|
MakeValid(&CPU_reg[rt(instr)], rtVal);
|
|
}
|
|
|
|
ret = CPU_reg[rs(instr)];
|
|
ret.y = 0.f;
|
|
ret.compFlags[1] = VALID;
|
|
|
|
ret.x = (f16Unsign(CPU_reg[rs(instr)].y) < f16Unsign(CPU_reg[rt(instr)].y)) ?
|
|
1.f :
|
|
(f16Unsign(CPU_reg[rs(instr)].x) < f16Unsign(CPU_reg[rt(instr)].x)) ? 1.f : 0.f;
|
|
|
|
ret.value = BoolToUInt32(rsVal < rtVal);
|
|
CPU_reg[rd(instr)] = ret;
|
|
}
|
|
|
|
////////////////////////////////////
|
|
// Register mult/div
|
|
////////////////////////////////////
|
|
|
|
void CPU_MULT(u32 instr, u32 rsVal, u32 rtVal)
|
|
{
|
|
// Hi/Lo = Rs * Rt (signed)
|
|
Validate(&CPU_reg[rs(instr)], rsVal);
|
|
Validate(&CPU_reg[rt(instr)], rtVal);
|
|
|
|
// iCB: Only require one valid input
|
|
if (((CPU_reg[rt(instr)].flags & VALID_01) != VALID_01) != ((CPU_reg[rs(instr)].flags & VALID_01) != VALID_01))
|
|
{
|
|
MakeValid(&CPU_reg[rs(instr)], rsVal);
|
|
MakeValid(&CPU_reg[rt(instr)], rtVal);
|
|
}
|
|
|
|
CPU_Lo = CPU_Hi = CPU_reg[rs(instr)];
|
|
|
|
CPU_Lo.halfFlags[0] = CPU_Hi.halfFlags[0] = (CPU_reg[rs(instr)].halfFlags[0] & CPU_reg[rt(instr)].halfFlags[0]);
|
|
|
|
double xx, xy, yx, yy;
|
|
double lx = 0, ly = 0, hx = 0, hy = 0;
|
|
|
|
// Multiply out components
|
|
xx = f16Unsign(CPU_reg[rs(instr)].x) * f16Unsign(CPU_reg[rt(instr)].x);
|
|
xy = f16Unsign(CPU_reg[rs(instr)].x) * (CPU_reg[rt(instr)].y);
|
|
yx = (CPU_reg[rs(instr)].y) * f16Unsign(CPU_reg[rt(instr)].x);
|
|
yy = (CPU_reg[rs(instr)].y) * (CPU_reg[rt(instr)].y);
|
|
|
|
// Split values into outputs
|
|
lx = xx;
|
|
|
|
ly = f16Overflow(xx);
|
|
ly += xy + yx;
|
|
|
|
hx = f16Overflow(ly);
|
|
hx += yy;
|
|
|
|
hy = f16Overflow(hx);
|
|
|
|
CPU_Lo.x = (float)f16Sign(lx);
|
|
CPU_Lo.y = (float)f16Sign(ly);
|
|
CPU_Hi.x = (float)f16Sign(hx);
|
|
CPU_Hi.y = (float)f16Sign(hy);
|
|
|
|
// compute PSX value
|
|
const u64 result = static_cast<u64>(static_cast<s64>(SignExtend64(rsVal)) * static_cast<s64>(SignExtend64(rtVal)));
|
|
CPU_Hi.value = Truncate32(result >> 32);
|
|
CPU_Lo.value = Truncate32(result);
|
|
}
|
|
|
|
void CPU_MULTU(u32 instr, u32 rsVal, u32 rtVal)
|
|
{
|
|
// Hi/Lo = Rs * Rt (unsigned)
|
|
Validate(&CPU_reg[rs(instr)], rsVal);
|
|
Validate(&CPU_reg[rt(instr)], rtVal);
|
|
|
|
// iCB: Only require one valid input
|
|
if (((CPU_reg[rt(instr)].flags & VALID_01) != VALID_01) != ((CPU_reg[rs(instr)].flags & VALID_01) != VALID_01))
|
|
{
|
|
MakeValid(&CPU_reg[rs(instr)], rsVal);
|
|
MakeValid(&CPU_reg[rt(instr)], rtVal);
|
|
}
|
|
|
|
CPU_Lo = CPU_Hi = CPU_reg[rs(instr)];
|
|
|
|
CPU_Lo.halfFlags[0] = CPU_Hi.halfFlags[0] = (CPU_reg[rs(instr)].halfFlags[0] & CPU_reg[rt(instr)].halfFlags[0]);
|
|
|
|
double xx, xy, yx, yy;
|
|
double lx = 0, ly = 0, hx = 0, hy = 0;
|
|
|
|
// Multiply out components
|
|
xx = f16Unsign(CPU_reg[rs(instr)].x) * f16Unsign(CPU_reg[rt(instr)].x);
|
|
xy = f16Unsign(CPU_reg[rs(instr)].x) * f16Unsign(CPU_reg[rt(instr)].y);
|
|
yx = f16Unsign(CPU_reg[rs(instr)].y) * f16Unsign(CPU_reg[rt(instr)].x);
|
|
yy = f16Unsign(CPU_reg[rs(instr)].y) * f16Unsign(CPU_reg[rt(instr)].y);
|
|
|
|
// Split values into outputs
|
|
lx = xx;
|
|
|
|
ly = f16Overflow(xx);
|
|
ly += xy + yx;
|
|
|
|
hx = f16Overflow(ly);
|
|
hx += yy;
|
|
|
|
hy = f16Overflow(hx);
|
|
|
|
CPU_Lo.x = (float)f16Sign(lx);
|
|
CPU_Lo.y = (float)f16Sign(ly);
|
|
CPU_Hi.x = (float)f16Sign(hx);
|
|
CPU_Hi.y = (float)f16Sign(hy);
|
|
|
|
// compute PSX value
|
|
const u64 result = ZeroExtend64(rsVal) * ZeroExtend64(rtVal);
|
|
CPU_Hi.value = Truncate32(result >> 32);
|
|
CPU_Lo.value = Truncate32(result);
|
|
}
|
|
|
|
void CPU_DIV(u32 instr, u32 rsVal, u32 rtVal)
|
|
{
|
|
// Lo = Rs / Rt (signed)
|
|
// Hi = Rs % Rt (signed)
|
|
Validate(&CPU_reg[rs(instr)], rsVal);
|
|
Validate(&CPU_reg[rt(instr)], rtVal);
|
|
|
|
//// iCB: Only require one valid input
|
|
if (((CPU_reg[rt(instr)].flags & VALID_01) != VALID_01) != ((CPU_reg[rs(instr)].flags & VALID_01) != VALID_01))
|
|
{
|
|
MakeValid(&CPU_reg[rs(instr)], rsVal);
|
|
MakeValid(&CPU_reg[rt(instr)], rtVal);
|
|
}
|
|
|
|
CPU_Lo = CPU_Hi = CPU_reg[rs(instr)];
|
|
|
|
CPU_Lo.halfFlags[0] = CPU_Hi.halfFlags[0] = (CPU_reg[rs(instr)].halfFlags[0] & CPU_reg[rt(instr)].halfFlags[0]);
|
|
|
|
double vs = f16Unsign(CPU_reg[rs(instr)].x) + (CPU_reg[rs(instr)].y) * (double)(1 << 16);
|
|
double vt = f16Unsign(CPU_reg[rt(instr)].x) + (CPU_reg[rt(instr)].y) * (double)(1 << 16);
|
|
|
|
double lo = vs / vt;
|
|
CPU_Lo.y = (float)f16Sign(f16Overflow(lo));
|
|
CPU_Lo.x = (float)f16Sign(lo);
|
|
|
|
double hi = fmod(vs, vt);
|
|
CPU_Hi.y = (float)f16Sign(f16Overflow(hi));
|
|
CPU_Hi.x = (float)f16Sign(hi);
|
|
|
|
// compute PSX value
|
|
if (static_cast<s32>(rtVal) == 0)
|
|
{
|
|
// divide by zero
|
|
CPU_Lo.value = (static_cast<s32>(rsVal) >= 0) ? UINT32_C(0xFFFFFFFF) : UINT32_C(1);
|
|
CPU_Hi.value = static_cast<u32>(static_cast<s32>(rsVal));
|
|
}
|
|
else if (rsVal == UINT32_C(0x80000000) && static_cast<s32>(rtVal) == -1)
|
|
{
|
|
// unrepresentable
|
|
CPU_Lo.value = UINT32_C(0x80000000);
|
|
CPU_Hi.value = 0;
|
|
}
|
|
else
|
|
{
|
|
CPU_Lo.value = static_cast<u32>(static_cast<s32>(rsVal) / static_cast<s32>(rtVal));
|
|
CPU_Hi.value = static_cast<u32>(static_cast<s32>(rsVal) % static_cast<s32>(rtVal));
|
|
}
|
|
}
|
|
|
|
void CPU_DIVU(u32 instr, u32 rsVal, u32 rtVal)
|
|
{
|
|
// Lo = Rs / Rt (unsigned)
|
|
// Hi = Rs % Rt (unsigned)
|
|
Validate(&CPU_reg[rs(instr)], rsVal);
|
|
Validate(&CPU_reg[rt(instr)], rtVal);
|
|
|
|
//// iCB: Only require one valid input
|
|
if (((CPU_reg[rt(instr)].flags & VALID_01) != VALID_01) != ((CPU_reg[rs(instr)].flags & VALID_01) != VALID_01))
|
|
{
|
|
MakeValid(&CPU_reg[rs(instr)], rsVal);
|
|
MakeValid(&CPU_reg[rt(instr)], rtVal);
|
|
}
|
|
|
|
CPU_Lo = CPU_Hi = CPU_reg[rs(instr)];
|
|
|
|
CPU_Lo.halfFlags[0] = CPU_Hi.halfFlags[0] = (CPU_reg[rs(instr)].halfFlags[0] & CPU_reg[rt(instr)].halfFlags[0]);
|
|
|
|
double vs = f16Unsign(CPU_reg[rs(instr)].x) + f16Unsign(CPU_reg[rs(instr)].y) * (double)(1 << 16);
|
|
double vt = f16Unsign(CPU_reg[rt(instr)].x) + f16Unsign(CPU_reg[rt(instr)].y) * (double)(1 << 16);
|
|
|
|
double lo = vs / vt;
|
|
CPU_Lo.y = (float)f16Sign(f16Overflow(lo));
|
|
CPU_Lo.x = (float)f16Sign(lo);
|
|
|
|
double hi = fmod(vs, vt);
|
|
CPU_Hi.y = (float)f16Sign(f16Overflow(hi));
|
|
CPU_Hi.x = (float)f16Sign(hi);
|
|
|
|
if (rtVal == 0)
|
|
{
|
|
// divide by zero
|
|
CPU_Lo.value = UINT32_C(0xFFFFFFFF);
|
|
CPU_Hi.value = rsVal;
|
|
}
|
|
else
|
|
{
|
|
CPU_Lo.value = rsVal / rtVal;
|
|
CPU_Hi.value = rsVal % rtVal;
|
|
}
|
|
}
|
|
|
|
////////////////////////////////////
|
|
// Shift operations (sa)
|
|
////////////////////////////////////
|
|
void CPU_SLL(u32 instr, u32 rtVal)
|
|
{
|
|
// Rd = Rt << Sa
|
|
const u32 rdVal = rtVal << sa(instr);
|
|
PGXP_value ret;
|
|
u32 sh = sa(instr);
|
|
Validate(&CPU_reg[rt(instr)], rtVal);
|
|
|
|
ret = CPU_reg[rt(instr)];
|
|
|
|
// TODO: Shift flags
|
|
double x = f16Unsign(CPU_reg[rt(instr)].x);
|
|
double y = f16Unsign(CPU_reg[rt(instr)].y);
|
|
if (sh >= 32)
|
|
{
|
|
x = 0.f;
|
|
y = 0.f;
|
|
}
|
|
else if (sh == 16)
|
|
{
|
|
y = f16Sign(x);
|
|
x = 0.f;
|
|
}
|
|
else if (sh >= 16)
|
|
{
|
|
y = x * (1 << (sh - 16));
|
|
y = f16Sign(y);
|
|
x = 0.f;
|
|
}
|
|
else
|
|
{
|
|
x = x * (1 << sh);
|
|
y = y * (1 << sh);
|
|
y += f16Overflow(x);
|
|
x = f16Sign(x);
|
|
y = f16Sign(y);
|
|
}
|
|
|
|
ret.x = (float)x;
|
|
ret.y = (float)y;
|
|
|
|
ret.value = rdVal;
|
|
CPU_reg[rd(instr)] = ret;
|
|
}
|
|
|
|
void CPU_SRL(u32 instr, u32 rtVal)
|
|
{
|
|
// Rd = Rt >> Sa
|
|
const u32 rdVal = rtVal >> sa(instr);
|
|
PGXP_value ret;
|
|
u32 sh = sa(instr);
|
|
Validate(&CPU_reg[rt(instr)], rtVal);
|
|
|
|
ret = CPU_reg[rt(instr)];
|
|
|
|
double x = CPU_reg[rt(instr)].x, y = f16Unsign(CPU_reg[rt(instr)].y);
|
|
|
|
psx_value iX;
|
|
iX.d = rtVal;
|
|
psx_value iY;
|
|
iY.d = rtVal;
|
|
|
|
iX.sd = (iX.sd << 16) >> 16; // remove Y
|
|
iY.sw.l = iX.sw.h; // overwrite x with sign(x)
|
|
|
|
// Shift test values
|
|
psx_value dX;
|
|
dX.sd = iX.sd >> sh;
|
|
psx_value dY;
|
|
dY.d = iY.d >> sh;
|
|
|
|
if (dX.sw.l != iX.sw.h)
|
|
x = x / (1 << sh);
|
|
else
|
|
x = dX.sw.l; // only sign bits left
|
|
|
|
if (dY.sw.l != iX.sw.h)
|
|
{
|
|
if (sh == 16)
|
|
{
|
|
x = y;
|
|
}
|
|
else if (sh < 16)
|
|
{
|
|
x += y * (1 << (16 - sh));
|
|
if (CPU_reg[rt(instr)].x < 0)
|
|
x += 1 << (16 - sh);
|
|
}
|
|
else
|
|
{
|
|
x += y / (1 << (sh - 16));
|
|
}
|
|
}
|
|
|
|
if ((dY.sw.h == 0) || (dY.sw.h == -1))
|
|
y = dY.sw.h;
|
|
else
|
|
y = y / (1 << sh);
|
|
|
|
x = f16Sign(x);
|
|
y = f16Sign(y);
|
|
|
|
ret.x = (float)x;
|
|
ret.y = (float)y;
|
|
|
|
ret.value = rdVal;
|
|
CPU_reg[rd(instr)] = ret;
|
|
}
|
|
|
|
void CPU_SRA(u32 instr, u32 rtVal)
|
|
{
|
|
// Rd = Rt >> Sa
|
|
const u32 rdVal = static_cast<u32>(static_cast<s32>(rtVal) >> sa(instr));
|
|
PGXP_value ret;
|
|
u32 sh = sa(instr);
|
|
Validate(&CPU_reg[rt(instr)], rtVal);
|
|
ret = CPU_reg[rt(instr)];
|
|
|
|
double x = CPU_reg[rt(instr)].x, y = CPU_reg[rt(instr)].y;
|
|
|
|
psx_value iX;
|
|
iX.d = rtVal;
|
|
psx_value iY;
|
|
iY.d = rtVal;
|
|
|
|
iX.sd = (iX.sd << 16) >> 16; // remove Y
|
|
iY.sw.l = iX.sw.h; // overwrite x with sign(x)
|
|
|
|
// Shift test values
|
|
psx_value dX;
|
|
dX.sd = iX.sd >> sh;
|
|
psx_value dY;
|
|
dY.sd = iY.sd >> sh;
|
|
|
|
if (dX.sw.l != iX.sw.h)
|
|
x = x / (1 << sh);
|
|
else
|
|
x = dX.sw.l; // only sign bits left
|
|
|
|
if (dY.sw.l != iX.sw.h)
|
|
{
|
|
if (sh == 16)
|
|
{
|
|
x = y;
|
|
}
|
|
else if (sh < 16)
|
|
{
|
|
x += y * (1 << (16 - sh));
|
|
if (CPU_reg[rt(instr)].x < 0)
|
|
x += 1 << (16 - sh);
|
|
}
|
|
else
|
|
{
|
|
x += y / (1 << (sh - 16));
|
|
}
|
|
}
|
|
|
|
if ((dY.sw.h == 0) || (dY.sw.h == -1))
|
|
y = dY.sw.h;
|
|
else
|
|
y = y / (1 << sh);
|
|
|
|
x = f16Sign(x);
|
|
y = f16Sign(y);
|
|
|
|
ret.x = (float)x;
|
|
ret.y = (float)y;
|
|
|
|
ret.value = rdVal;
|
|
CPU_reg[rd(instr)] = ret;
|
|
}
|
|
|
|
////////////////////////////////////
|
|
// Shift operations variable
|
|
////////////////////////////////////
|
|
void CPU_SLLV(u32 instr, u32 rtVal, u32 rsVal)
|
|
{
|
|
// Rd = Rt << Rs
|
|
const u32 rdVal = rtVal << rsVal;
|
|
PGXP_value ret;
|
|
u32 sh = rsVal & 0x1F;
|
|
Validate(&CPU_reg[rt(instr)], rtVal);
|
|
Validate(&CPU_reg[rs(instr)], rsVal);
|
|
|
|
ret = CPU_reg[rt(instr)];
|
|
|
|
double x = f16Unsign(CPU_reg[rt(instr)].x);
|
|
double y = f16Unsign(CPU_reg[rt(instr)].y);
|
|
if (sh >= 32)
|
|
{
|
|
x = 0.f;
|
|
y = 0.f;
|
|
}
|
|
else if (sh == 16)
|
|
{
|
|
y = f16Sign(x);
|
|
x = 0.f;
|
|
}
|
|
else if (sh >= 16)
|
|
{
|
|
y = x * (1 << (sh - 16));
|
|
y = f16Sign(y);
|
|
x = 0.f;
|
|
}
|
|
else
|
|
{
|
|
x = x * (1 << sh);
|
|
y = y * (1 << sh);
|
|
y += f16Overflow(x);
|
|
x = f16Sign(x);
|
|
y = f16Sign(y);
|
|
}
|
|
|
|
ret.x = (float)x;
|
|
ret.y = (float)y;
|
|
|
|
ret.value = rdVal;
|
|
CPU_reg[rd(instr)] = ret;
|
|
}
|
|
|
|
void CPU_SRLV(u32 instr, u32 rtVal, u32 rsVal)
|
|
{
|
|
// Rd = Rt >> Sa
|
|
const u32 rdVal = rtVal >> rsVal;
|
|
PGXP_value ret;
|
|
u32 sh = rsVal & 0x1F;
|
|
Validate(&CPU_reg[rt(instr)], rtVal);
|
|
Validate(&CPU_reg[rs(instr)], rsVal);
|
|
|
|
ret = CPU_reg[rt(instr)];
|
|
|
|
double x = CPU_reg[rt(instr)].x, y = f16Unsign(CPU_reg[rt(instr)].y);
|
|
|
|
psx_value iX;
|
|
iX.d = rtVal;
|
|
psx_value iY;
|
|
iY.d = rtVal;
|
|
|
|
iX.sd = (iX.sd << 16) >> 16; // remove Y
|
|
iY.sw.l = iX.sw.h; // overwrite x with sign(x)
|
|
|
|
// Shift test values
|
|
psx_value dX;
|
|
dX.sd = iX.sd >> sh;
|
|
psx_value dY;
|
|
dY.d = iY.d >> sh;
|
|
|
|
if (dX.sw.l != iX.sw.h)
|
|
x = x / (1 << sh);
|
|
else
|
|
x = dX.sw.l; // only sign bits left
|
|
|
|
if (dY.sw.l != iX.sw.h)
|
|
{
|
|
if (sh == 16)
|
|
{
|
|
x = y;
|
|
}
|
|
else if (sh < 16)
|
|
{
|
|
x += y * (1 << (16 - sh));
|
|
if (CPU_reg[rt(instr)].x < 0)
|
|
x += 1 << (16 - sh);
|
|
}
|
|
else
|
|
{
|
|
x += y / (1 << (sh - 16));
|
|
}
|
|
}
|
|
|
|
if ((dY.sw.h == 0) || (dY.sw.h == -1))
|
|
y = dY.sw.h;
|
|
else
|
|
y = y / (1 << sh);
|
|
|
|
x = f16Sign(x);
|
|
y = f16Sign(y);
|
|
|
|
ret.x = (float)x;
|
|
ret.y = (float)y;
|
|
|
|
ret.value = rdVal;
|
|
CPU_reg[rd(instr)] = ret;
|
|
}
|
|
|
|
void CPU_SRAV(u32 instr, u32 rtVal, u32 rsVal)
|
|
{
|
|
// Rd = Rt >> Sa
|
|
const u32 rdVal = static_cast<u32>(static_cast<s32>(rtVal) >> rsVal);
|
|
PGXP_value ret;
|
|
u32 sh = rsVal & 0x1F;
|
|
Validate(&CPU_reg[rt(instr)], rtVal);
|
|
Validate(&CPU_reg[rs(instr)], rsVal);
|
|
|
|
ret = CPU_reg[rt(instr)];
|
|
|
|
double x = CPU_reg[rt(instr)].x, y = CPU_reg[rt(instr)].y;
|
|
|
|
psx_value iX;
|
|
iX.d = rtVal;
|
|
psx_value iY;
|
|
iY.d = rtVal;
|
|
|
|
iX.sd = (iX.sd << 16) >> 16; // remove Y
|
|
iY.sw.l = iX.sw.h; // overwrite x with sign(x)
|
|
|
|
// Shift test values
|
|
psx_value dX;
|
|
dX.sd = iX.sd >> sh;
|
|
psx_value dY;
|
|
dY.sd = iY.sd >> sh;
|
|
|
|
if (dX.sw.l != iX.sw.h)
|
|
x = x / (1 << sh);
|
|
else
|
|
x = dX.sw.l; // only sign bits left
|
|
|
|
if (dY.sw.l != iX.sw.h)
|
|
{
|
|
if (sh == 16)
|
|
{
|
|
x = y;
|
|
}
|
|
else if (sh < 16)
|
|
{
|
|
x += y * (1 << (16 - sh));
|
|
if (CPU_reg[rt(instr)].x < 0)
|
|
x += 1 << (16 - sh);
|
|
}
|
|
else
|
|
{
|
|
x += y / (1 << (sh - 16));
|
|
}
|
|
}
|
|
|
|
if ((dY.sw.h == 0) || (dY.sw.h == -1))
|
|
y = dY.sw.h;
|
|
else
|
|
y = y / (1 << sh);
|
|
|
|
x = f16Sign(x);
|
|
y = f16Sign(y);
|
|
|
|
ret.x = (float)x;
|
|
ret.y = (float)y;
|
|
|
|
ret.value = rdVal;
|
|
CPU_reg[rd(instr)] = ret;
|
|
}
|
|
|
|
void CPU_MFHI(u32 instr, u32 hiVal)
|
|
{
|
|
// Rd = Hi
|
|
Validate(&CPU_Hi, hiVal);
|
|
|
|
CPU_reg[rd(instr)] = CPU_Hi;
|
|
}
|
|
|
|
void CPU_MTHI(u32 instr, u32 rdVal)
|
|
{
|
|
// Hi = Rd
|
|
Validate(&CPU_reg[rd(instr)], rdVal);
|
|
|
|
CPU_Hi = CPU_reg[rd(instr)];
|
|
}
|
|
|
|
void CPU_MFLO(u32 instr, u32 loVal)
|
|
{
|
|
// Rd = Lo
|
|
Validate(&CPU_Lo, loVal);
|
|
|
|
CPU_reg[rd(instr)] = CPU_Lo;
|
|
}
|
|
|
|
void CPU_MTLO(u32 instr, u32 rdVal)
|
|
{
|
|
// Lo = Rd
|
|
Validate(&CPU_reg[rd(instr)], rdVal);
|
|
|
|
CPU_Lo = CPU_reg[rd(instr)];
|
|
}
|
|
|
|
void CPU_MFC0(u32 instr, u32 rdVal)
|
|
{
|
|
// CPU[Rt] = CP0[Rd]
|
|
Validate(&CP0_reg[rd(instr)], rdVal);
|
|
CPU_reg[rt(instr)] = CP0_reg[rd(instr)];
|
|
CPU_reg[rt(instr)].value = rdVal;
|
|
}
|
|
|
|
void CPU_MTC0(u32 instr, u32 rdVal, u32 rtVal)
|
|
{
|
|
// CP0[Rd] = CPU[Rt]
|
|
Validate(&CPU_reg[rt(instr)], rtVal);
|
|
CP0_reg[rd(instr)] = CPU_reg[rt(instr)];
|
|
CP0_reg[rd(instr)].value = rdVal;
|
|
}
|
|
|
|
} // namespace PGXP
|