MIPSCodeUtils.h

// Copyright (c) 2012- PPSSPP Project.

// 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, version 2.0 or later versions.

// 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 2.0 for more details.

// A copy of the GPL 2.0 should have been included with the program.
// If not, see http://www.gnu.org/licenses/

// Official git repository and contact information can be found at
// https://github.com/hrydgard/ppsspp and http://www.ppsspp.org/.

#pragma once

#include "Common/CommonTypes.h"
#include "Common/Data/Convert/SmallDataConvert.h"
#include "Core/MIPS/MIPS.h"

// Invalid branch target address
#define INVALIDTARGET 0xFFFFFFFF

#define MIPS_MAKE_B(offs)   (0x10000000 | ((offs) & 0xFFFF))
#define MIPS_MAKE_J(addr)   (0x08000000 | ((addr)>>2))
#define MIPS_MAKE_JAL(addr) (0x0C000000 | ((addr)>>2))
#define MIPS_MAKE_JR_RA()   (0x03e00008)
#define MIPS_MAKE_NOP()     (0)
#define MIPS_MAKE_BNEZ(pc, addr, rs) (0x14000000 | (rs << 21) | (u32)(((int)(addr - (pc + 4)) >> 2) & 0xFFFF))

#define MIPS_MAKE_ADDIU(dreg, sreg, immval) ((9 << 26) | ((dreg) << 16) | ((sreg) << 21) | (immval))
#define MIPS_MAKE_LUI(reg, immval) (0x3c000000 | ((reg) << 16) | (immval))
#define MIPS_MAKE_ORI(rt, rs, immval) (0x34000000 | ((rs) << 21) | ((rt) << 16) | (immval))
#define MIPS_MAKE_LW(rt, rs, immval) (0x8c000000 | ((rs) << 21) | ((rt) << 16) | (immval))
#define MIPS_MAKE_SYSCALL(module, function) GetSyscallOp(module, GetNibByName(module, function))
#define MIPS_MAKE_BREAK(n) (((n) << 6) | 13)  // ! :)

#define MIPS_GET_OP(op)   ((op>>26) & 0x3F)
#define MIPS_GET_FUNC(op) (op & 0x3F)
#define MIPS_GET_SA(op)   ((op>>6) & 0x1F)

#define MIPS_GET_RS(op) MIPSGPReg((op>>21) & 0x1F)
#define MIPS_GET_RT(op) MIPSGPReg((op>>16) & 0x1F)
#define MIPS_GET_RD(op) MIPSGPReg((op>>11) & 0x1F)

#define MIPS_GET_FS(op) ((op>>11) & 0x1F)
#define MIPS_GET_FT(op) ((op>>16) & 0x1F)
#define MIPS_GET_FD(op) ((op>>6 ) & 0x1F)

#define MIPS_GET_VD(op) (op & 0x7F)
#define MIPS_GET_VS(op) ((op>>8) & 0x7F)
#define MIPS_GET_VT(op) ((op>>16) & 0x7F)

inline int32_t SignExtend8ToS32(MIPSOpcode op) {
	return SignExtend8ToS32(op.encoding);
}

inline uint32_t SignExtend8ToU32(MIPSOpcode op) {
	return SignExtend8ToU32(op.encoding);
}

inline int32_t SignExtend16ToS32(MIPSOpcode op) {
	return SignExtend16ToS32(op.encoding);
}

inline uint32_t SignExtend16ToU32(MIPSOpcode op) {
	return SignExtend16ToU32(op.encoding);
}

namespace MIPSCodeUtils
{
	u32 GetCallTarget(u32 addr);
	u32 GetBranchTarget(u32 addr);
	// Ignores bltzal/etc. instructions that change RA.
	u32 GetBranchTargetNoRA(u32 addr);
	u32 GetBranchTargetNoRA(u32 addr, MIPSOpcode op);
	u32 GetJumpTarget(u32 addr);
	u32 GetSureBranchTarget(u32 addr);
	bool IsVFPUBranch(MIPSOpcode op);
	bool IsBranch(MIPSOpcode op);
}