ppsspp/Common/MipsEmitter.cpp
Unknown W. Brackets 74ef968503 mips: Prevent compilation of an easy mistake.
It's easy to write LW(T0, T1, T2) but that's not valid.
2014-12-13 19:38:43 -08:00

510 lines
17 KiB
C++

// Copyright (c) 2014- 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/.
// Symbian can't build this due to an old gcc/lib combination, and doesn't need to.
// Kind programmer, if you want to translate this to a proper feature-detection
// define, please feel free to.
#ifndef __SYMBIAN32__
#include "base/logging.h"
#include <assert.h>
#include <stdarg.h>
#include <stddef.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "MemoryUtil.h"
#include "MipsEmitter.h"
#include "CPUDetect.h"
namespace MIPSGen {
void MIPSEmitter::SetCodePtr(u8 *ptr) {
code_ = ptr;
lastCacheFlushEnd_ = ptr;
}
void MIPSEmitter::ReserveCodeSpace(u32 bytes) {
for (u32 i = 0; i < bytes / 4; ++i) {
BREAK(0);
}
}
const u8 *MIPSEmitter::AlignCode16() {
ReserveCodeSpace((-(intptr_t)code_) & 15);
return code_;
}
const u8 *MIPSEmitter::AlignCodePage() {
// TODO: Assuming code pages ought to be 4K?
ReserveCodeSpace((-(intptr_t)code_) & 4095);
return code_;
}
const u8 *MIPSEmitter::GetCodePtr() const {
return code_;
}
u8 *MIPSEmitter::GetWritableCodePtr() {
return code_;
}
void MIPSEmitter::FlushIcache() {
FlushIcacheSection(lastCacheFlushEnd_, code_);
lastCacheFlushEnd_ = code_;
}
void MIPSEmitter::FlushIcacheSection(u8 *start, u8 *end) {
#if defined(MIPS)
#ifdef __clang__
__clear_cache(start, end);
#else
__builtin___clear_cache(start, end);
#endif
#endif
}
void MIPSEmitter::BREAK(u32 code) {
// 000000 iiiiiiiiiiiiiiiiiiii 001101
_dbg_assert_msg_(JIT, code <= 0xfffff, "Bad emitter arguments");
Write32Fields(26, 0x00, 6, code & 0xfffff, 0, 0x0d);
}
FixupBranch MIPSEmitter::J(std::function<void ()> delaySlot) {
// 000010 iiiiiiiiiiiiiiiiiiiiiiiiii (fix up)
FixupBranch b = MakeFixupBranch(BRANCH_26);
Write32Fields(26, 0x02);
ApplyDelaySlot(delaySlot);
return b;
}
void MIPSEmitter::J(const void *func, std::function<void ()> delaySlot) {
SetJumpTarget(J(delaySlot), func);
}
FixupBranch MIPSEmitter::JAL(std::function<void ()> delaySlot) {
// 000011 iiiiiiiiiiiiiiiiiiiiiiiiii (fix up)
FixupBranch b = MakeFixupBranch(BRANCH_26);
Write32Fields(26, 0x03);
ApplyDelaySlot(delaySlot);
return b;
}
void MIPSEmitter::JAL(const void *func, std::function<void ()> delaySlot) {
SetJumpTarget(JAL(delaySlot), func);
}
void MIPSEmitter::JR(MIPSReg rs, std::function<void ()> delaySlot) {
// 000000 sssss xxxxxxxxxx hint- 001000 (hint must be 0.)
_dbg_assert_msg_(JIT, rs < F_BASE, "Bad emitter arguments");
Write32Fields(26, 0x00, 21, rs, 0, 0x08);
ApplyDelaySlot(delaySlot);
}
void MIPSEmitter::JALR(MIPSReg rd, MIPSReg rs, std::function<void ()> delaySlot) {
// 000000 sssss xxxxx ddddd hint- 001001 (hint must be 0.)
_dbg_assert_msg_(JIT, rs < F_BASE, "Bad emitter arguments");
Write32Fields(26, 0x00, 21, rs, 11, rd, 0, 0x09);
ApplyDelaySlot(delaySlot);
}
FixupBranch MIPSEmitter::BLTZ(MIPSReg rs, std::function<void ()> delaySlot) {
// 000001 sssss xxxxx iiiiiiiiiiiiiii (fix up)
_dbg_assert_msg_(JIT, rs < F_BASE, "Bad emitter arguments");
FixupBranch b = MakeFixupBranch(BRANCH_16);
Write32Fields(26, 0x01, 21, rs);
ApplyDelaySlot(delaySlot);
return b;
}
void MIPSEmitter::BLTZ(MIPSReg rs, const void *func, std::function<void ()> delaySlot) {
SetJumpTarget(BLTZ(rs, delaySlot), func);
}
FixupBranch MIPSEmitter::BEQ(MIPSReg rs, MIPSReg rt, std::function<void ()> delaySlot) {
// 000100 sssss ttttt iiiiiiiiiiiiiii (fix up)
_dbg_assert_msg_(JIT, rs < F_BASE && rt < F_BASE, "Bad emitter arguments");
FixupBranch b = MakeFixupBranch(BRANCH_16);
Write32Fields(26, 0x04, 21, rs, 16, rt);
ApplyDelaySlot(delaySlot);
return b;
}
void MIPSEmitter::BEQ(MIPSReg rs, MIPSReg rt, const void *func, std::function<void ()> delaySlot) {
SetJumpTarget(BEQ(rs, rt, delaySlot), func);
}
FixupBranch MIPSEmitter::BNE(MIPSReg rs, MIPSReg rt, std::function<void ()> delaySlot) {
// 000101 sssss ttttt iiiiiiiiiiiiiii (fix up)
_dbg_assert_msg_(JIT, rs < F_BASE && rt < F_BASE, "Bad emitter arguments");
FixupBranch b = MakeFixupBranch(BRANCH_16);
Write32Fields(26, 0x05, 21, rs, 16, rt);
ApplyDelaySlot(delaySlot);
return b;
}
void MIPSEmitter::BNE(MIPSReg rs, MIPSReg rt, const void *func, std::function<void ()> delaySlot) {
SetJumpTarget(BNE(rs, rt, delaySlot), func);
}
FixupBranch MIPSEmitter::BLEZ(MIPSReg rs, std::function<void ()> delaySlot) {
// 000110 sssss xxxxx iiiiiiiiiiiiiii (fix up)
_dbg_assert_msg_(JIT, rs < F_BASE, "Bad emitter arguments");
FixupBranch b = MakeFixupBranch(BRANCH_16);
Write32Fields(26, 0x06, 21, rs);
ApplyDelaySlot(delaySlot);
return b;
}
void MIPSEmitter::BLEZ(MIPSReg rs, const void *func, std::function<void ()> delaySlot) {
SetJumpTarget(BLEZ(rs, delaySlot), func);
}
FixupBranch MIPSEmitter::BGTZ(MIPSReg rs, std::function<void ()> delaySlot) {
// 000111 sssss xxxxx iiiiiiiiiiiiiii (fix up)
_dbg_assert_msg_(JIT, rs < F_BASE, "Bad emitter arguments");
FixupBranch b = MakeFixupBranch(BRANCH_16);
Write32Fields(26, 0x07, 21, rs);
ApplyDelaySlot(delaySlot);
return b;
}
void MIPSEmitter::BGTZ(MIPSReg rs, const void *func, std::function<void ()> delaySlot) {
SetJumpTarget(BGTZ(rs, delaySlot), func);
}
void MIPSEmitter::SetJumpTarget(const FixupBranch &branch) {
SetJumpTarget(branch, code_);
}
bool MIPSEmitter::BInRange(const void *func) {
return BInRange(code_, func);
}
bool MIPSEmitter::JInRange(const void *func) {
return JInRange(code_, func);
}
void MIPSEmitter::SetJumpTarget(const FixupBranch &branch, const void *dst) {
const intptr_t srcp = (intptr_t)branch.ptr;
const intptr_t dstp = (intptr_t)dst;
u32 *fixup = (u32 *)branch.ptr;
_dbg_assert_msg_(JIT, (dstp & 3) == 0, "Destination should be aligned");
if (branch.type == BRANCH_16) {
// The distance is encoded as words from the delay slot.
ptrdiff_t distance = (dstp - srcp - 4) >> 2;
_dbg_assert_msg_(JIT, BInRange(branch.ptr, dst), "Destination is too far away (%p -> %p)", branch.ptr, dst);
*fixup = (*fixup & 0xffff0000) | (distance & 0x0000ffff);
} else {
// Absolute, easy.
_dbg_assert_msg_(JIT, JInRange(branch.ptr, dst), "Destination is too far away (%p -> %p)", branch.ptr, dst);
*fixup = (*fixup & 0xfc000000) | ((dstp >> 2) & 0x03ffffff);
}
}
bool MIPSEmitter::BInRange(const void *src, const void *dst) {
const intptr_t srcp = (intptr_t)src;
const intptr_t dstp = (intptr_t)dst;
// The distance is encoded as words from the delay slot.
ptrdiff_t distance = (dstp - srcp - 4) >> 2;
return distance >= -0x8000 && distance < 0x8000;
}
bool MIPSEmitter::JInRange(const void *src, const void *dst) {
const intptr_t srcp = (intptr_t)src;
const intptr_t dstp = (intptr_t)dst;
return (srcp - (srcp & 0x0fffffff)) == (dstp - (dstp & 0x0fffffff));
}
void MIPSEmitter::ApplyDelaySlot(std::function<void ()> delaySlot) {
if (delaySlot) {
delaySlot();
} else {
// We just insert a NOP if there's no delay slot provided. Safer.
NOP();
}
}
void MIPSEmitter::QuickCallFunction(MIPSReg scratchreg, const void *func) {
_dbg_assert_msg_(JIT, scratchreg < F_BASE, "Bad emitter arguments");
if (JInRange(func)) {
JAL(func);
} else {
// This may never happen.
MOVP2R(scratchreg, func);
JALR(scratchreg);
}
}
FixupBranch MIPSEmitter::MakeFixupBranch(FixupBranchType type) {
FixupBranch b;
b.ptr = code_;
b.type = type;
return b;
}
void MIPSEmitter::LB(MIPSReg value, MIPSReg base, s16 offset) {
// 100000 sssss ttttt iiiiiiiiiiiiiiii - rs = base, rt = value
_dbg_assert_msg_(JIT, value < F_BASE && base < F_BASE, "Bad emitter arguments");
Write32Fields(26, 0x20, 21, base, 16, value, 0, (u16)offset);
}
void MIPSEmitter::LH(MIPSReg value, MIPSReg base, s16 offset) {
// 100001 sssss ttttt iiiiiiiiiiiiiiii - rs = base, rt = value
_dbg_assert_msg_(JIT, value < F_BASE && base < F_BASE, "Bad emitter arguments");
Write32Fields(26, 0x21, 21, base, 16, value, 0, (u16)offset);
}
void MIPSEmitter::LW(MIPSReg value, MIPSReg base, s16 offset) {
// 100011 sssss ttttt iiiiiiiiiiiiiiii - rs = base, rt = value
_dbg_assert_msg_(JIT, value < F_BASE && base < F_BASE, "Bad emitter arguments");
Write32Fields(26, 0x23, 21, base, 16, value, 0, (u16)offset);
}
void MIPSEmitter::SB(MIPSReg value, MIPSReg base, s16 offset) {
// 101000 sssss ttttt iiiiiiiiiiiiiiii - rs = base, rt = value
_dbg_assert_msg_(JIT, value < F_BASE && base < F_BASE, "Bad emitter arguments");
Write32Fields(26, 0x28, 21, base, 16, value, 0, (u16)offset);
}
void MIPSEmitter::SH(MIPSReg value, MIPSReg base, s16 offset) {
// 101001 sssss ttttt iiiiiiiiiiiiiiii - rs = base, rt = value
_dbg_assert_msg_(JIT, value < F_BASE && base < F_BASE, "Bad emitter arguments");
Write32Fields(26, 0x29, 21, base, 16, value, 0, (u16)offset);
}
void MIPSEmitter::SW(MIPSReg value, MIPSReg base, s16 offset) {
// 101011 sssss ttttt iiiiiiiiiiiiiiii - rs = base, rt = value
_dbg_assert_msg_(JIT, value < F_BASE && base < F_BASE, "Bad emitter arguments");
Write32Fields(26, 0x2b, 21, base, 16, value, 0, (u16)offset);
}
void MIPSEmitter::SLL(MIPSReg rd, MIPSReg rt, u8 sa) {
// 000000 xxxxx ttttt ddddd aaaaa 000000
_dbg_assert_msg_(JIT, rd < F_BASE && rt < F_BASE && sa <= 0x1f, "Bad emitter arguments");
Write32Fields(26, 0x00, 16, rt, 11, rd, 6, sa & 0x1f, 0, 0x00);
}
void MIPSEmitter::SRL(MIPSReg rd, MIPSReg rt, u8 sa) {
// 000000 xxxxx ttttt ddddd aaaaa 000010
_dbg_assert_msg_(JIT, rd < F_BASE && rt < F_BASE && sa <= 0x1f, "Bad emitter arguments");
Write32Fields(26, 0x00, 16, rt, 11, rd, 6, sa & 0x1f, 0, 0x02);
}
void MIPSEmitter::SRA(MIPSReg rd, MIPSReg rt, u8 sa) {
// 000000 xxxxx ttttt ddddd aaaaa 000011
_dbg_assert_msg_(JIT, rd < F_BASE && rt < F_BASE && sa <= 0x1f, "Bad emitter arguments");
Write32Fields(26, 0x00, 16, rt, 11, rd, 6, sa & 0x1f, 0, 0x03);
}
void MIPSEmitter::SLLV(MIPSReg rd, MIPSReg rt, MIPSReg rs) {
// 000000 sssss ttttt ddddd xxxxx 000100
_dbg_assert_msg_(JIT, rd < F_BASE && rt < F_BASE && rs < F_BASE, "Bad emitter arguments");
Write32Fields(26, 0x00, 21, rs, 16, rt, 11, rd, 0, 0x04);
}
void MIPSEmitter::SRLV(MIPSReg rd, MIPSReg rt, MIPSReg rs) {
// 000000 sssss ttttt ddddd xxxxx 000110
_dbg_assert_msg_(JIT, rd < F_BASE && rt < F_BASE && rs < F_BASE, "Bad emitter arguments");
Write32Fields(26, 0x00, 21, rs, 16, rt, 11, rd, 0, 0x06);
}
void MIPSEmitter::SRAV(MIPSReg rd, MIPSReg rt, MIPSReg rs) {
// 000000 sssss ttttt ddddd xxxxx 000111
_dbg_assert_msg_(JIT, rd < F_BASE && rt < F_BASE && rs < F_BASE, "Bad emitter arguments");
Write32Fields(26, 0x00, 21, rs, 16, rt, 11, rd, 0, 0x07);
}
void MIPSEmitter::SLT(MIPSReg rd, MIPSReg rs, MIPSReg rt) {
// 000000 sssss ttttt ddddd xxxxx 101010
_dbg_assert_msg_(JIT, rd < F_BASE && rt < F_BASE && rs < F_BASE, "Bad emitter arguments");
Write32Fields(26, 0x00, 21, rs, 16, rt, 11, rd, 0, 0x2a);
}
void MIPSEmitter::SLTU(MIPSReg rd, MIPSReg rs, MIPSReg rt) {
// 000000 sssss ttttt ddddd xxxxx 101011
_dbg_assert_msg_(JIT, rd < F_BASE && rt < F_BASE && rs < F_BASE, "Bad emitter arguments");
Write32Fields(26, 0x00, 21, rs, 16, rt, 11, rd, 0, 0x2b);
}
void MIPSEmitter::SLTI(MIPSReg rt, MIPSReg rs, s16 imm) {
// 001010 sssss ttttt iiiiiiiiiiiiiiii
_dbg_assert_msg_(JIT, rs < F_BASE && rt < F_BASE, "Bad emitter arguments");
Write32Fields(26, 0x0a, 21, rs, 16, rt, 0, (u16)imm);
}
void MIPSEmitter::SLTIU(MIPSReg rt, MIPSReg rs, s16 imm) {
// 001011 sssss ttttt iiiiiiiiiiiiiiii
_dbg_assert_msg_(JIT, rs < F_BASE && rt < F_BASE, "Bad emitter arguments");
Write32Fields(26, 0x0b, 21, rs, 16, rt, 0, (u16)imm);
}
void MIPSEmitter::ADDU(MIPSReg rd, MIPSReg rs, MIPSReg rt) {
// 000000 sssss ttttt ddddd 00000100001
_dbg_assert_msg_(JIT, rd < F_BASE && rt < F_BASE && rs < F_BASE, "Bad emitter arguments");
Write32Fields(26, 0x00, 21, rs, 16, rt, 11, rd, 0, 0x21);
}
void MIPSEmitter::SUBU(MIPSReg rd, MIPSReg rs, MIPSReg rt) {
// 000000 sssss ttttt ddddd 00000100011
_dbg_assert_msg_(JIT, rd < F_BASE && rt < F_BASE && rs < F_BASE, "Bad emitter arguments");
Write32Fields(26, 0x00, 21, rs, 16, rt, 11, rd, 0, 0x23);
}
void MIPSEmitter::ADDIU(MIPSReg rt, MIPSReg rs, s16 imm) {
// 001001 sssss ttttt iiiiiiiiiiiiiiii
_dbg_assert_msg_(JIT, rs < F_BASE && rt < F_BASE, "Bad emitter arguments");
Write32Fields(26, 0x09, 21, rs, 16, rt, 0, (u16)imm);
}
void MIPSEmitter::AND(MIPSReg rd, MIPSReg rs, MIPSReg rt) {
// 000000 sssss ttttt ddddd 00000100100
_dbg_assert_msg_(JIT, rd < F_BASE && rt < F_BASE && rs < F_BASE, "Bad emitter arguments");
Write32Fields(26, 0x00, 21, rs, 16, rt, 11, rd, 0, 0x24);
}
void MIPSEmitter::OR(MIPSReg rd, MIPSReg rs, MIPSReg rt) {
// 000000 sssss ttttt ddddd 00000100101
_dbg_assert_msg_(JIT, rd < F_BASE && rt < F_BASE && rs < F_BASE, "Bad emitter arguments");
Write32Fields(26, 0x00, 21, rs, 16, rt, 11, rd, 0, 0x25);
}
void MIPSEmitter::XOR(MIPSReg rd, MIPSReg rs, MIPSReg rt) {
// 000000 sssss ttttt ddddd 00000100110
_dbg_assert_msg_(JIT, rd < F_BASE && rt < F_BASE && rs < F_BASE, "Bad emitter arguments");
Write32Fields(26, 0x00, 21, rs, 16, rt, 11, rd, 0, 0x26);
}
void MIPSEmitter::ANDI(MIPSReg rt, MIPSReg rs, s16 imm) {
// 001100 sssss ttttt iiiiiiiiiiiiiiii
_dbg_assert_msg_(JIT, rs < F_BASE && rt < F_BASE, "Bad emitter arguments");
Write32Fields(26, 0x0c, 21, rs, 16, rt, 0, (u16)imm);
}
void MIPSEmitter::ORI(MIPSReg rt, MIPSReg rs, s16 imm) {
// 001101 sssss ttttt iiiiiiiiiiiiiiii
_dbg_assert_msg_(JIT, rs < F_BASE && rt < F_BASE, "Bad emitter arguments");
Write32Fields(26, 0x0d, 21, rs, 16, rt, 0, (u16)imm);
}
void MIPSEmitter::XORI(MIPSReg rt, MIPSReg rs, s16 imm) {
// 001110 sssss ttttt iiiiiiiiiiiiiiii
_dbg_assert_msg_(JIT, rs < F_BASE && rt < F_BASE, "Bad emitter arguments");
Write32Fields(26, 0x0e, 21, rs, 16, rt, 0, (u16)imm);
}
void MIPSEmitter::LUI(MIPSReg rt, s16 imm) {
// 001111 00000 ttttt iiiiiiiiiiiiiiii
_dbg_assert_msg_(JIT, rt < F_BASE, "Bad emitter arguments");
Write32Fields(26, 0x0f, 16, rt, 0, (u16)imm);
}
void MIPSEmitter::INS(MIPSReg rt, MIPSReg rs, s8 pos, s8 size) {
// 011111 sssss ttttt xxxxx yyyyy 000100
_dbg_assert_msg_(JIT, rt < F_BASE && rs < F_BASE && pos <= 0x1f && (size+pos+1) <= 0x1f, "Bad emitter arguments");
Write32Fields(26, 0x1f, 21, rt, 16, rs, 11, (size+pos+1) & 0x1f, 6, pos & 0x1f, 0, 0x04);
}
void MIPSEmitter::EXT(MIPSReg rt, MIPSReg rs, s8 pos, s8 size) {
// 111111 sssss ttttt xxxxx yyyyy 000000
_dbg_assert_msg_(JIT, rt < F_BASE && rs < F_BASE && pos <= 0x1f && size >= 1, "Bad emitter arguments");
Write32Fields(26, 0x3f, 21, rt, 16, rs, 11, (size-1) & 0x1f, 6, pos & 0x1f, 0, 0x00);
}
void MIPSEmitter::DSLL(MIPSReg rd, MIPSReg rt, u8 sa) {
// 000000 xxxxx ttttt ddddd aaaaa 111000 DSLL
// 000000 xxxxx ttttt ddddd aaaaa 111100 DSLL32
_dbg_assert_msg_(JIT, rd < F_BASE && rt < F_BASE && sa <= 0x3f, "Bad emitter arguments");
// TODO: Assert MIPS64.
if (sa >= 32) {
Write32Fields(26, 0x00, 16, rt, 11, rd, 6, (sa - 32) & 0x1f, 0, 0x3c);
} else {
Write32Fields(26, 0x00, 16, rt, 11, rd, 6, sa & 0x1f, 0, 0x38);
}
}
void MIPSEmitter::MOVI2R(MIPSReg reg, u64 imm) {
_dbg_assert_msg_(JIT, reg < F_BASE, "Bad emitter arguments");
// TODO: Assert MIPS64.
// Probably better to use a literal pool and load.
LUI(reg, imm >> 48);
ORI(reg, reg, (imm >> 32) & 0x0000ffff);
DSLL(reg, reg, 16);
ORI(reg, reg, (imm >> 16) & 0x0000ffff);
DSLL(reg, reg, 16);
ORI(reg, reg, (imm >> 0) & 0x0000ffff);
}
void MIPSEmitter::MOVI2R(MIPSReg reg, u32 imm) {
_dbg_assert_msg_(JIT, reg < F_BASE, "Bad emitter arguments");
if ((imm & 0xffff0000) != 0) {
#if 0
// TODO: CPUDetect MIPS64. Ideally allow emitter to emit MIPS32 on x64.
ORI(reg, R_ZERO, imm >> 16);
DSLL(reg, reg, 16);
ORI(reg, reg, imm & 0x0000ffff);
#else
LUI(reg, imm >> 16);
ORI(reg, reg, imm & 0x0000ffff);
#endif
} else {
ORI(reg, R_ZERO, imm & 0x0000ffff);
}
}
void MIPSCodeBlock::AllocCodeSpace(int size) {
region_size = size;
region = (u8 *)AllocateExecutableMemory(region_size);
SetCodePtr(region);
}
// Always clear code space with breakpoints, so that if someone accidentally executes
// uninitialized, it just breaks into the debugger.
void MIPSCodeBlock::ClearCodeSpace() {
// Set BREAK instructions on all of it.
u32 *region32 = (u32 *)region;
for (u32 i = 0; i < region_size / 4; ++i) {
*region32++ = 0x0000000d;
}
ResetCodePtr();
}
void MIPSCodeBlock::FreeCodeSpace() {
FreeMemoryPages(region, region_size);
region = NULL;
region_size = 0;
}
void MIPSCodeBlock::WriteProtect() {
WriteProtectMemory(region, region_size, true);
}
void MIPSCodeBlock::UnWriteProtect() {
UnWriteProtectMemory(region, region_size, false);
}
}
#endif