mirror of
https://github.com/libretro/ppsspp.git
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165 lines
3.1 KiB
C++
165 lines
3.1 KiB
C++
// Copyright (c) 2012- PPSSPP Project.
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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, version 2.0 or later versions.
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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 2.0 for more details.
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// A copy of the GPL 2.0 should have been included with the program.
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// If not, see http://www.gnu.org/licenses/
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// Official git repository and contact information can be found at
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// https://github.com/hrydgard/ppsspp and http://www.ppsspp.org/.
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#pragma once
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#include "../../Globals.h"
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#include "../CPU.h"
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enum
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{
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MIPS_REG_ZERO=0,
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MIPS_REG_COMPILER_SCRATCH=1,
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MIPS_REG_V0=2,
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MIPS_REG_V1=3,
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MIPS_REG_A0=4,
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MIPS_REG_A1=5,
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MIPS_REG_A2=6,
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MIPS_REG_A3=7,
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MIPS_REG_A4=8, // Seems to be N32 register calling convention - there are 8 args instead of 4.
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MIPS_REG_A5=9,
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MIPS_REG_S0=16,
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MIPS_REG_S1=17,
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MIPS_REG_S2=18,
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MIPS_REG_S3=19,
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MIPS_REG_S4=20,
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MIPS_REG_S5=21,
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MIPS_REG_S6=22,
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MIPS_REG_S7=23,
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MIPS_REG_K0=26,
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MIPS_REG_K1=27,
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MIPS_REG_GP=28,
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MIPS_REG_SP=29,
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MIPS_REG_FP=30,
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MIPS_REG_RA=31,
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// ID for mipscall "callback" is stored here - from JPCSP
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MIPS_REG_CALL_ID=MIPS_REG_S0,
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};
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enum
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{
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VFPU_CTRL_SPREFIX,
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VFPU_CTRL_TPREFIX,
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VFPU_CTRL_DPREFIX,
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VFPU_CTRL_CC,
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VFPU_CTRL_INF4,
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VFPU_CTRL_RSV5,
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VFPU_CTRL_RSV6,
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VFPU_CTRL_REV,
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VFPU_CTRL_RCX0,
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VFPU_CTRL_RCX1,
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VFPU_CTRL_RCX2,
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VFPU_CTRL_RCX3,
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VFPU_CTRL_RCX4,
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VFPU_CTRL_RCX5,
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VFPU_CTRL_RCX6,
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VFPU_CTRL_RCX7,
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VFPU_CTRL_MAX,
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//unknown....
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};
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// George Marsaglia-style random number generator.
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class GMRng {
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public:
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void Init(int seed) {
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m_w = seed ^ (seed << 16);
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if (!m_w) m_w = 1337;
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m_z = ~seed;
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if (!m_z) m_z = 31337;
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}
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u32 R32() {
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m_z = 36969 * (m_z & 65535) + (m_z >> 16);
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m_w = 18000 * (m_w & 65535) + (m_w >> 16);
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return (m_z << 16) + m_w;
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}
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private:
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u32 m_w;
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u32 m_z;
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};
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class MIPSState : public CPU
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{
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public:
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MIPSState();
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~MIPSState();
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void Reset();
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u32 r[32];
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float f[32];
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float v[128];
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u32 vfpuCtrl[16];
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bool vfpuWriteMask[4];
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u32 pc;
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u32 nextPC;
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u32 hi;
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u32 lo;
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u32 fpcond; //separate for speed - TODO: not worth it
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u32 fcr0;
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u32 fcr31; //fpu control register
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GMRng rng; // VFPU hardware random number generator. Probably not the right type.
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bool inDelaySlot;
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int llBit; // ll/sc
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CPUType cpuType;
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// TODO: How do we handle exceptions?
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u32 exceptions;
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enum { BREAKING_EXCEPTIONS = 1 };
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// Debug stuff
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u32 debugCount; // can be used to count basic blocks before crashes, etc.
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void WriteFCR(int reg, int value);
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u32 ReadFCR(int reg);
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void SetWriteMask(const bool wm[4]);
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void Irq();
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void SWI();
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void Abort();
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void SingleStep();
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int RunLoopUntil(u64 globalTicks);
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};
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class MIPSDebugInterface;
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//The one we are compiling or running currently
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extern MIPSState *currentMIPS;
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extern MIPSDebugInterface *currentDebugMIPS;
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extern MIPSState mipsr4k;
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void MIPS_Init();
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int MIPS_SingleStep();
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void MIPS_Shutdown();
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void MIPS_Irq();
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void MIPS_SWI();
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