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dolphin/Source/Core/Common/Src/ArmEmitter.cpp

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// Copyright (C) 2003 Dolphin 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.
// 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 SVN repository and contact information can be found at
// http://code.google.com/p/dolphin-emu/
#include "Common.h"
#include "ArmEmitter.h"
#include "CPUDetect.h"
#include <assert.h>
#include <stdarg.h>
// For cache flushing on Symbian/iOS/Blackberry
#ifdef __SYMBIAN32__
#include <e32std.h>
#endif
#ifdef IOS
#include <libkern/OSCacheControl.h>
#include <sys/mman.h>
#endif
#ifdef BLACKBERRY
#include <sys/mman.h>
#endif
namespace ArmGen
{
inline u32 RotR(u32 a, int amount) {
if (!amount) return a;
return (a >> amount) | (a << (32 - amount));
}
inline u32 RotL(u32 a, int amount) {
if (!amount) return a;
return (a << amount) | (a >> (32 - amount));
}
bool TryMakeOperand2(u32 imm, Operand2 &op2) {
// Just brute force it.
for (int i = 0; i < 16; i++) {
int mask = RotR(0xFF, i * 2);
if ((imm & mask) == imm) {
op2 = Operand2((u8)(RotL(imm, i * 2)), (u8)i);
return true;
}
}
return false;
}
bool TryMakeOperand2_AllowInverse(u32 imm, Operand2 &op2, bool *inverse)
{
if (!TryMakeOperand2(imm, op2)) {
*inverse = true;
return TryMakeOperand2(~imm, op2);
} else {
*inverse = false;
return true;
}
}
bool TryMakeOperand2_AllowNegation(s32 imm, Operand2 &op2, bool *negated)
{
if (!TryMakeOperand2(imm, op2)) {
*negated = true;
return TryMakeOperand2(-imm, op2);
} else {
*negated = false;
return true;
}
}
Operand2 AssumeMakeOperand2(u32 imm) {
Operand2 op2;
bool result = TryMakeOperand2(imm, op2);
_dbg_assert_msg_(JIT, result, "Could not make assumed Operand2.");
return op2;
}
bool ARMXEmitter::TrySetValue_TwoOp(ARMReg reg, u32 val)
{
int ops = 0;
for (int i = 0; i < 16; i++)
{
if ((val >> (i*2)) & 0x3)
{
ops++;
i+=3;
}
}
if (ops > 2)
return false;
bool first = true;
for (int i = 0; i < 16; i++, val >>=2) {
if (val & 0x3) {
first ? MOV(reg, Operand2((u8)val, (u8)((16-i) & 0xF)))
: ORR(reg, reg, Operand2((u8)val, (u8)((16-i) & 0xF)));
first = false;
i+=3;
val >>= 6;
}
}
return true;
}
void ARMXEmitter::MOVI2F(ARMReg dest, float val, ARMReg tempReg)
{
union {float f; u32 u;} conv;
conv.f = val;
MOVI2R(tempReg, conv.u);
VMOV(dest, tempReg);
// TODO: VMOV an IMM directly if possible
// Otherwise, use a literal pool and VLDR directly (+- 1020)
}
void ARMXEmitter::ADDI2R(ARMReg rd, ARMReg rs, u32 val, ARMReg scratch)
{
Operand2 op2;
bool negated;
if (TryMakeOperand2_AllowNegation(val, op2, &negated)) {
if (!negated)
ADD(rd, rs, op2);
else
SUB(rd, rs, op2);
} else {
MOVI2R(scratch, val);
ADD(rd, rs, scratch);
}
}
void ARMXEmitter::ANDI2R(ARMReg rd, ARMReg rs, u32 val, ARMReg scratch)
{
Operand2 op2;
bool inverse;
if (TryMakeOperand2_AllowInverse(val, op2, &inverse)) {
if (!inverse) {
AND(rd, rs, op2);
} else {
BIC(rd, rs, op2);
}
} else {
MOVI2R(scratch, val);
AND(rd, rs, scratch);
}
}
void ARMXEmitter::CMPI2R(ARMReg rs, u32 val, ARMReg scratch)
{
Operand2 op2;
bool negated;
if (TryMakeOperand2_AllowNegation(val, op2, &negated)) {
if (!negated)
CMP(rs, op2);
else
CMN(rs, op2);
} else {
MOVI2R(scratch, val);
CMP(rs, scratch);
}
}
void ARMXEmitter::ORI2R(ARMReg rd, ARMReg rs, u32 val, ARMReg scratch)
{
Operand2 op2;
if (TryMakeOperand2(val, op2)) {
ORR(rd, rs, op2);
} else {
MOVI2R(scratch, val);
ORR(rd, rs, scratch);
}
}
void ARMXEmitter::FlushLitPool()
{
for(std::vector<LiteralPool>::iterator it = currentLitPool.begin(); it != currentLitPool.end(); ++it) {
// Search for duplicates
for(std::vector<LiteralPool>::iterator old_it = currentLitPool.begin(); old_it != it; ++old_it) {
if ((*old_it).val == (*it).val)
(*it).loc = (*old_it).loc;
}
// Write the constant to Literal Pool
if (!(*it).loc)
{
(*it).loc = (s32)code;
Write32((*it).val);
}
s32 offset = (*it).loc - (s32)(*it).ldr_address - 8;
// Backpatch the LDR
*(u32*)(*it).ldr_address |= (offset >= 0) << 23 | abs(offset);
}
// TODO: Save a copy of previous pools in case they are still in range.
currentLitPool.clear();
}
void ARMXEmitter::AddNewLit(u32 val)
{
LiteralPool pool_item;
pool_item.loc = 0;
pool_item.val = val;
pool_item.ldr_address = code;
currentLitPool.push_back(pool_item);
}
void ARMXEmitter::MOVI2R(ARMReg reg, u32 val, bool optimize)
{
Operand2 op2;
bool inverse;
if (cpu_info.bArmV7 && !optimize)
{
// For backpatching on ARMv7
MOVW(reg, val & 0xFFFF);
MOVT(reg, val, true);
}
else if (TryMakeOperand2_AllowInverse(val, op2, &inverse)) {
inverse ? MVN(reg, op2) : MOV(reg, op2);
} else {
if (cpu_info.bArmV7)
{
// Use MOVW+MOVT for ARMv7+
MOVW(reg, val & 0xFFFF);
if(val & 0xFFFF0000)
MOVT(reg, val, true);
} else if (!TrySetValue_TwoOp(reg,val)) {
// Use literal pool for ARMv6.
AddNewLit(val);
LDR(reg, _PC); // To be backpatched later
}
}
}
void ARMXEmitter::QuickCallFunction(ARMReg reg, void *func) {
MOVI2R(reg, (u32)(func));
BL(reg);
}
void ARMXEmitter::SetCodePtr(u8 *ptr)
{
code = ptr;
startcode = code;
lastCacheFlushEnd = ptr;
}
const u8 *ARMXEmitter::GetCodePtr() const
{
return code;
}
u8 *ARMXEmitter::GetWritableCodePtr()
{
return code;
}
void ARMXEmitter::ReserveCodeSpace(u32 bytes)
{
for (u32 i = 0; i < bytes/4; i++)
Write32(0xE1200070); //bkpt 0
}
const u8 *ARMXEmitter::AlignCode16()
{
ReserveCodeSpace((-(s32)code) & 15);
return code;
}
const u8 *ARMXEmitter::AlignCodePage()
{
ReserveCodeSpace((-(s32)code) & 4095);
return code;
}
void ARMXEmitter::FlushIcache()
{
FlushIcacheSection(lastCacheFlushEnd, code);
lastCacheFlushEnd = code;
}
void ARMXEmitter::FlushIcacheSection(u8 *start, u8 *end)
{
#ifdef __SYMBIAN32__
User::IMB_Range(start, end);
#elif defined(BLACKBERRY)
msync(start, end - start, MS_SYNC | MS_INVALIDATE_ICACHE);
#elif defined(IOS)
// Header file says this is equivalent to: sys_icache_invalidate(start, end - start);
sys_cache_control(kCacheFunctionPrepareForExecution, start, end - start);
#elif !defined(_WIN32)
#ifdef __clang__
__clear_cache(start, end);
#else
__builtin___clear_cache(start, end);
#endif
#endif
}
void ARMXEmitter::SetCC(CCFlags cond)
{
condition = cond << 28;
}
void ARMXEmitter::NOP(int count)
{
for (int i = 0; i < count; i++) {
Write32(condition | 0x01A00000);
}
}
void ARMXEmitter::SETEND(bool BE)
{
//SETEND is non-conditional
Write32( 0xF1010000 | (BE << 9));
}
void ARMXEmitter::BKPT(u16 arg)
{
Write32(condition | 0x01200070 | (arg << 4 & 0x000FFF00) | (arg & 0x0000000F));
}
void ARMXEmitter::YIELD()
{
Write32(condition | 0x0320F001);
}
FixupBranch ARMXEmitter::B()
{
FixupBranch branch;
branch.type = 0; // Zero for B
branch.ptr = code;
branch.condition = condition;
//We'll write NOP here for now.
Write32(condition | 0x01A00000);
return branch;
}
FixupBranch ARMXEmitter::BL()
{
FixupBranch branch;
branch.type = 1; // Zero for B
branch.ptr = code;
branch.condition = condition;
//We'll write NOP here for now.
Write32(condition | 0x01A00000);
return branch;
}
FixupBranch ARMXEmitter::B_CC(CCFlags Cond)
{
FixupBranch branch;
branch.type = 0; // Zero for B
branch.ptr = code;
branch.condition = Cond << 28;
//We'll write NOP here for now.
Write32(condition | 0x01A00000);
return branch;
}
void ARMXEmitter::B_CC(CCFlags Cond, const void *fnptr)
{
s32 distance = (s32)fnptr - (s32(code) + 8);
_assert_msg_(DYNA_REC, distance > -33554432
&& distance <= 33554432,
"B_CC out of range (%p calls %p)", code, fnptr);
Write32((Cond << 28) | 0x0A000000 | ((distance >> 2) & 0x00FFFFFF));
}
FixupBranch ARMXEmitter::BL_CC(CCFlags Cond)
{
FixupBranch branch;
branch.type = 1; // Zero for B
branch.ptr = code;
branch.condition = Cond << 28;
//We'll write NOP here for now.
Write32(condition | 0x01A00000);
return branch;
}
void ARMXEmitter::SetJumpTarget(FixupBranch const &branch)
{
s32 distance = (s32(code) - 8) - (s32)branch.ptr;
_assert_msg_(DYNA_REC, distance > -33554432
&& distance <= 33554432,
"SetJumpTarget out of range (%p calls %p)", code,
branch.ptr);
if(branch.type == 0) // B
*(u32*)branch.ptr = (u32)(branch.condition | (10 << 24) | ((distance >> 2) &
0x00FFFFFF));
else // BL
*(u32*)branch.ptr = (u32)(branch.condition | 0x0B000000 | ((distance >> 2)
& 0x00FFFFFF));
}
void ARMXEmitter::B (const void *fnptr)
{
s32 distance = (s32)fnptr - (s32(code) + 8);
_assert_msg_(DYNA_REC, distance > -33554432
&& distance <= 33554432,
"B out of range (%p calls %p)", code, fnptr);
Write32(condition | 0x0A000000 | ((distance >> 2) & 0x00FFFFFF));
}
void ARMXEmitter::B(ARMReg src)
{
Write32(condition | 0x12FFF10 | src);
}
void ARMXEmitter::BL(const void *fnptr)
{
s32 distance = (s32)fnptr - (s32(code) + 8);
_assert_msg_(DYNA_REC, distance > -33554432
&& distance <= 33554432,
"BL out of range (%p calls %p)", code, fnptr);
Write32(condition | 0x0B000000 | ((distance >> 2) & 0x00FFFFFF));
}
void ARMXEmitter::BL(ARMReg src)
{
Write32(condition | 0x12FFF30 | src);
}
void ARMXEmitter::PUSH(const int num, ...)
{
u16 RegList = 0;
u8 Reg;
int i;
va_list vl;
va_start(vl, num);
for (i=0;i<num;i++)
{
Reg = va_arg(vl, u32);
RegList |= (1 << Reg);
}
va_end(vl);
Write32(condition | (2349 << 16) | RegList);
}
void ARMXEmitter::POP(const int num, ...)
{
u16 RegList = 0;
u8 Reg;
int i;
va_list vl;
va_start(vl, num);
for (i=0;i<num;i++)
{
Reg = va_arg(vl, u32);
RegList |= (1 << Reg);
}
va_end(vl);
Write32(condition | (2237 << 16) | RegList);
}
void ARMXEmitter::WriteShiftedDataOp(u32 op, bool SetFlags, ARMReg dest, ARMReg src, Operand2 op2)
{
Write32(condition | (13 << 21) | (SetFlags << 20) | (dest << 12) | op2.Imm5() | (op << 4) | src);
}
void ARMXEmitter::WriteShiftedDataOp(u32 op, bool SetFlags, ARMReg dest, ARMReg src, ARMReg op2)
{
Write32(condition | (13 << 21) | (SetFlags << 20) | (dest << 12) | (op2 << 8) | (op << 4) | src);
}
// IMM, REG, IMMSREG, RSR
// -1 for invalid if the instruction doesn't support that
const s32 InstOps[][4] = {{16, 0, 0, 0}, // AND(s)
{17, 1, 1, 1}, // EOR(s)
{18, 2, 2, 2}, // SUB(s)
{19, 3, 3, 3}, // RSB(s)
{20, 4, 4, 4}, // ADD(s)
{21, 5, 5, 5}, // ADC(s)
{22, 6, 6, 6}, // SBC(s)
{23, 7, 7, 7}, // RSC(s)
{24, 8, 8, 8}, // TST
{25, 9, 9, 9}, // TEQ
{26, 10, 10, 10}, // CMP
{27, 11, 11, 11}, // CMN
{28, 12, 12, 12}, // ORR(s)
{29, 13, 13, 13}, // MOV(s)
{30, 14, 14, 14}, // BIC(s)
{31, 15, 15, 15}, // MVN(s)
{24, -1, -1, -1}, // MOVW
{26, -1, -1, -1}, // MOVT
};
const char *InstNames[] = { "AND",
"EOR",
"SUB",
"RSB",
"ADD",
"ADC",
"SBC",
"RSC",
"TST",
"TEQ",
"CMP",
"CMN",
"ORR",
"MOV",
"BIC",
"MVN"
};
void ARMXEmitter::AND (ARMReg Rd, ARMReg Rn, Operand2 Rm) { WriteInstruction(0, Rd, Rn, Rm); }
void ARMXEmitter::ANDS(ARMReg Rd, ARMReg Rn, Operand2 Rm) { WriteInstruction(0, Rd, Rn, Rm, true); }
void ARMXEmitter::EOR (ARMReg Rd, ARMReg Rn, Operand2 Rm) { WriteInstruction(1, Rd, Rn, Rm); }
void ARMXEmitter::EORS(ARMReg Rd, ARMReg Rn, Operand2 Rm) { WriteInstruction(1, Rd, Rn, Rm, true); }
void ARMXEmitter::SUB (ARMReg Rd, ARMReg Rn, Operand2 Rm) { WriteInstruction(2, Rd, Rn, Rm); }
void ARMXEmitter::SUBS(ARMReg Rd, ARMReg Rn, Operand2 Rm) { WriteInstruction(2, Rd, Rn, Rm, true); }
void ARMXEmitter::RSB (ARMReg Rd, ARMReg Rn, Operand2 Rm) { WriteInstruction(3, Rd, Rn, Rm); }
void ARMXEmitter::RSBS(ARMReg Rd, ARMReg Rn, Operand2 Rm) { WriteInstruction(3, Rd, Rn, Rm, true); }
void ARMXEmitter::ADD (ARMReg Rd, ARMReg Rn, Operand2 Rm) { WriteInstruction(4, Rd, Rn, Rm); }
void ARMXEmitter::ADDS(ARMReg Rd, ARMReg Rn, Operand2 Rm) { WriteInstruction(4, Rd, Rn, Rm, true); }
void ARMXEmitter::ADC (ARMReg Rd, ARMReg Rn, Operand2 Rm) { WriteInstruction(5, Rd, Rn, Rm); }
void ARMXEmitter::ADCS(ARMReg Rd, ARMReg Rn, Operand2 Rm) { WriteInstruction(5, Rd, Rn, Rm, true); }
void ARMXEmitter::SBC (ARMReg Rd, ARMReg Rn, Operand2 Rm) { WriteInstruction(6, Rd, Rn, Rm); }
void ARMXEmitter::SBCS(ARMReg Rd, ARMReg Rn, Operand2 Rm) { WriteInstruction(6, Rd, Rn, Rm, true); }
void ARMXEmitter::RSC (ARMReg Rd, ARMReg Rn, Operand2 Rm) { WriteInstruction(7, Rd, Rn, Rm); }
void ARMXEmitter::RSCS(ARMReg Rd, ARMReg Rn, Operand2 Rm) { WriteInstruction(7, Rd, Rn, Rm, true); }
void ARMXEmitter::TST ( ARMReg Rn, Operand2 Rm) { WriteInstruction(8, R0, Rn, Rm, true); }
void ARMXEmitter::TEQ ( ARMReg Rn, Operand2 Rm) { WriteInstruction(9, R0, Rn, Rm, true); }
void ARMXEmitter::CMP ( ARMReg Rn, Operand2 Rm) { WriteInstruction(10, R0, Rn, Rm, true); }
void ARMXEmitter::CMN ( ARMReg Rn, Operand2 Rm) { WriteInstruction(11, R0, Rn, Rm, true); }
void ARMXEmitter::ORR (ARMReg Rd, ARMReg Rn, Operand2 Rm) { WriteInstruction(12, Rd, Rn, Rm); }
void ARMXEmitter::ORRS(ARMReg Rd, ARMReg Rn, Operand2 Rm) { WriteInstruction(12, Rd, Rn, Rm, true); }
void ARMXEmitter::MOV (ARMReg Rd, Operand2 Rm) { WriteInstruction(13, Rd, R0, Rm); }
void ARMXEmitter::MOVS(ARMReg Rd, Operand2 Rm) { WriteInstruction(13, Rd, R0, Rm, true); }
void ARMXEmitter::BIC (ARMReg Rd, ARMReg Rn, Operand2 Rm) { WriteInstruction(14, Rd, Rn, Rm); }
void ARMXEmitter::BICS(ARMReg Rd, ARMReg Rn, Operand2 Rm) { WriteInstruction(14, Rd, Rn, Rm, true); }
void ARMXEmitter::MVN (ARMReg Rd, Operand2 Rm) { WriteInstruction(15, Rd, R0, Rm); }
void ARMXEmitter::MVNS(ARMReg Rd, Operand2 Rm) { WriteInstruction(15, Rd, R0, Rm, true); }
void ARMXEmitter::MOVW(ARMReg Rd, Operand2 Rm) { WriteInstruction(16, Rd, R0, Rm); }
void ARMXEmitter::MOVT(ARMReg Rd, Operand2 Rm, bool TopBits) { WriteInstruction(17, Rd, R0, TopBits ? Rm.Value >> 16 : Rm); }
void ARMXEmitter::WriteInstruction (u32 Op, ARMReg Rd, ARMReg Rn, Operand2 Rm, bool SetFlags) // This can get renamed later
{
s32 op = InstOps[Op][Rm.GetType()]; // Type always decided by last operand
u32 Data = Rm.GetData();
if (Rm.GetType() == TYPE_IMM)
{
switch (Op)
{
// MOV cases that support IMM16
case 16:
case 17:
Data = Rm.Imm16();
break;
default:
break;
}
}
if (op == -1)
_assert_msg_(DYNA_REC, false, "%s not yet support %d", InstNames[Op], Rm.GetType());
Write32(condition | (op << 21) | (SetFlags ? (1 << 20) : 0) | Rn << 16 | Rd << 12 | Data);
}
// Data Operations
void ARMXEmitter::WriteSignedMultiply(u32 Op, u32 Op2, u32 Op3, ARMReg dest, ARMReg r1, ARMReg r2)
{
Write32(condition | (0x7 << 24) | (Op << 20) | (dest << 16) | (Op2 << 12) | (r1 << 8) | (Op3 << 5) | (1 << 4) | r2);
}
void ARMXEmitter::UDIV(ARMReg dest, ARMReg dividend, ARMReg divisor)
{
if (!cpu_info.bIDIVa)
PanicAlert("Trying to use integer divide on hardware that doesn't support it. Bad programmer.");
WriteSignedMultiply(3, 0xF, 0, dest, divisor, dividend);
}
void ARMXEmitter::SDIV(ARMReg dest, ARMReg dividend, ARMReg divisor)
{
if (!cpu_info.bIDIVa)
PanicAlert("Trying to use integer divide on hardware that doesn't support it. Bad programmer.");
WriteSignedMultiply(1, 0xF, 0, dest, divisor, dividend);
}
void ARMXEmitter::LSL (ARMReg dest, ARMReg src, Operand2 op2) { WriteShiftedDataOp(0, false, dest, src, op2);}
void ARMXEmitter::LSLS(ARMReg dest, ARMReg src, Operand2 op2) { WriteShiftedDataOp(0, true, dest, src, op2);}
void ARMXEmitter::LSL (ARMReg dest, ARMReg src, ARMReg op2) { WriteShiftedDataOp(1, false, dest, src, op2);}
void ARMXEmitter::LSLS(ARMReg dest, ARMReg src, ARMReg op2) { WriteShiftedDataOp(1, true, dest, src, op2);}
void ARMXEmitter::LSR (ARMReg dest, ARMReg src, Operand2 op2) { WriteShiftedDataOp(3, false, dest, src, op2);}
void ARMXEmitter::MUL (ARMReg dest, ARMReg src, ARMReg op2)
{
Write32(condition | (dest << 16) | (src << 8) | (9 << 4) | op2);
}
void ARMXEmitter::MULS(ARMReg dest, ARMReg src, ARMReg op2)
{
Write32(condition | (1 << 20) | (dest << 16) | (src << 8) | (9 << 4) | op2);
}
void ARMXEmitter::Write4OpMultiply(u32 op, ARMReg destLo, ARMReg destHi, ARMReg rm, ARMReg rn) {
Write32(condition | (op << 20) | (destHi << 16) | (destLo << 12) | (rm << 8) | (9 << 4) | rn);
}
void ARMXEmitter::UMULL(ARMReg destLo, ARMReg destHi, ARMReg rm, ARMReg rn)
{
Write4OpMultiply(0x8, destLo, destHi, rn, rm);
}
void ARMXEmitter::SMULL(ARMReg destLo, ARMReg destHi, ARMReg rm, ARMReg rn)
{
Write4OpMultiply(0xC, destLo, destHi, rn, rm);
}
void ARMXEmitter::UMLAL(ARMReg destLo, ARMReg destHi, ARMReg rm, ARMReg rn)
{
Write4OpMultiply(0xA, destLo, destHi, rn, rm);
}
void ARMXEmitter::SMLAL(ARMReg destLo, ARMReg destHi, ARMReg rm, ARMReg rn)
{
Write4OpMultiply(0xE, destLo, destHi, rn, rm);
}
void ARMXEmitter::UBFX(ARMReg dest, ARMReg rn, u8 lsb, u8 width)
{
Write32(condition | (0x7E0 << 16) | ((width - 1) << 16) | (dest << 12) | (lsb << 7) | (5 << 4) | rn);
}
void ARMXEmitter::CLZ(ARMReg rd, ARMReg rm)
{
Write32(condition | (0x16F << 16) | (rd << 12) | (0xF1 << 4) | rm);
}
void ARMXEmitter::BFI(ARMReg rd, ARMReg rn, u8 lsb, u8 width)
{
u32 msb = (lsb + width - 1);
if (msb > 31) msb = 31;
Write32(condition | (0x7C0 << 16) | (msb << 16) | (rd << 12) | (lsb << 7) | (1 << 4) | rn);
}
void ARMXEmitter::SXTB (ARMReg dest, ARMReg op2)
{
Write32(condition | (0x6AF << 16) | (dest << 12) | (7 << 4) | op2);
}
void ARMXEmitter::SXTH (ARMReg dest, ARMReg op2, u8 rotation)
{
SXTAH(dest, (ARMReg)15, op2, rotation);
}
void ARMXEmitter::SXTAH(ARMReg dest, ARMReg src, ARMReg op2, u8 rotation)
{
// bits ten and 11 are the rotation amount, see 8.8.232 for more
// information
Write32(condition | (0x6B << 20) | (src << 16) | (dest << 12) | (rotation << 10) | (7 << 4) | op2);
}
void ARMXEmitter::RBIT(ARMReg dest, ARMReg src)
{
Write32(condition | (0x6F << 20) | (0xF << 16) | (dest << 12) | (0xF3 << 4) | src);
}
void ARMXEmitter::REV (ARMReg dest, ARMReg src)
{
Write32(condition | (0x6B << 20) | (0xF << 16) | (dest << 12) | (0xF3 << 4) | src);
}
void ARMXEmitter::REV16(ARMReg dest, ARMReg src)
{
Write32(condition | (0x3DF << 16) | (dest << 12) | (0xFD << 4) | src);
}
void ARMXEmitter::_MSR (bool write_nzcvq, bool write_g, Operand2 op2)
{
Write32(condition | (0x320F << 12) | (write_nzcvq << 19) | (write_g << 18) | op2.Imm12Mod());
}
void ARMXEmitter::_MSR (bool write_nzcvq, bool write_g, ARMReg src)
{
Write32(condition | (0x120F << 12) | (write_nzcvq << 19) | (write_g << 18) | src);
}
void ARMXEmitter::MRS (ARMReg dest)
{
Write32(condition | (16 << 20) | (15 << 16) | (dest << 12));
}
void ARMXEmitter::LDREX(ARMReg dest, ARMReg base)
{
Write32(condition | (25 << 20) | (base << 16) | (dest << 12) | 0xF9F);
}
void ARMXEmitter::STREX(ARMReg result, ARMReg base, ARMReg op)
{
_assert_msg_(DYNA_REC, (result != base && result != op), "STREX dest can't be other two registers");
Write32(condition | (24 << 20) | (base << 16) | (result << 12) | (0xF9 << 4) | op);
}
void ARMXEmitter::DMB ()
{
Write32(0xF57FF05E);
}
void ARMXEmitter::SVC(Operand2 op)
{
Write32(condition | (0x0F << 24) | op.Imm24());
}
// IMM, REG, IMMSREG, RSR
// -1 for invalid if the instruction doesn't support that
const s32 LoadStoreOps[][4] = {
{0x40, 0x60, 0x60, -1}, // STR
{0x41, 0x61, 0x61, -1}, // LDR
{0x44, 0x64, 0x64, -1}, // STRB
{0x45, 0x65, 0x65, -1}, // LDRB
// Special encodings
{ 0x4, 0x0, -1, -1}, // STRH
{ 0x5, 0x1, -1, -1}, // LDRH
{ 0x5, 0x1, -1, -1}, // LDRSB
{ 0x5, 0x1, -1, -1}, // LDRSH
};
const char *LoadStoreNames[] = {
"STR",
"LDR",
"STRB",
"LDRB",
"STRH",
"LDRH",
"LDRSB",
"LDRSH",
};
void ARMXEmitter::WriteStoreOp(u32 Op, ARMReg Rt, ARMReg Rn, Operand2 Rm, bool RegAdd)
{
s32 op = LoadStoreOps[Op][Rm.GetType()]; // Type always decided by last operand
u32 Data;
// Qualcomm chipsets get /really/ angry if you don't use index, even if the offset is zero.
// Some of these encodings require Index at all times anyway. Doesn't really matter.
// bool Index = op2 != 0 ? true : false;
bool Index = true;
bool Add = false;
// Special Encoding (misc addressing mode)
bool SpecialOp = false;
bool Half = false;
bool SignedLoad = false;
if (op == -1)
_assert_msg_(DYNA_REC, false, "%s does not support %d", LoadStoreNames[Op], Rm.GetType());
switch (Op)
{
case 4: // STRH
SpecialOp = true;
Half = true;
SignedLoad = false;
break;
case 5: // LDRH
SpecialOp = true;
Half = true;
SignedLoad = false;
break;
case 6: // LDRSB
SpecialOp = true;
Half = false;
SignedLoad = true;
break;
case 7: // LDRSH
SpecialOp = true;
Half = true;
SignedLoad = true;
break;
}
switch (Rm.GetType())
{
case TYPE_IMM:
{
s32 Temp = (s32)Rm.Value;
Data = abs(Temp);
// The offset is encoded differently on this one.
if (SpecialOp)
Data = (Data & 0xF0 << 4) | (Data & 0xF);
if (Temp >= 0) Add = true;
}
break;
case TYPE_REG:
Data = Rm.GetData();
Add = RegAdd;
break;
case TYPE_IMMSREG:
if (!SpecialOp)
{
Data = Rm.GetData();
Add = RegAdd;
break;
}
// Intentional fallthrough: TYPE_IMMSREG not supported for misc addressing.
default:
// RSR not supported for any of these
// We already have the warning above
BKPT(0x2);
return;
break;
}
if (SpecialOp)
{
// Add SpecialOp things
Data = (0x9 << 4) | (SignedLoad << 6) | (Half << 5) | Data;
}
Write32(condition | (op << 20) | (Index << 24) | (Add << 23) | (Rn << 16) | (Rt << 12) | Data);
}
void ARMXEmitter::LDR (ARMReg dest, ARMReg base, Operand2 op2, bool RegAdd) { WriteStoreOp(1, dest, base, op2, RegAdd);}
void ARMXEmitter::LDRB(ARMReg dest, ARMReg base, Operand2 op2, bool RegAdd) { WriteStoreOp(3, dest, base, op2, RegAdd);}
void ARMXEmitter::LDRH(ARMReg dest, ARMReg base, Operand2 op2, bool RegAdd) { WriteStoreOp(5, dest, base, op2, RegAdd);}
void ARMXEmitter::LDRSB(ARMReg dest, ARMReg base, Operand2 op2, bool RegAdd) { WriteStoreOp(6, dest, base, op2, RegAdd);}
void ARMXEmitter::LDRSH(ARMReg dest, ARMReg base, Operand2 op2, bool RegAdd) { WriteStoreOp(7, dest, base, op2, RegAdd);}
void ARMXEmitter::STR (ARMReg result, ARMReg base, Operand2 op2, bool RegAdd) { WriteStoreOp(0, result, base, op2, RegAdd);}
void ARMXEmitter::STRH (ARMReg result, ARMReg base, Operand2 op2, bool RegAdd) { WriteStoreOp(4, result, base, op2, RegAdd);}
void ARMXEmitter::STRB (ARMReg result, ARMReg base, Operand2 op2, bool RegAdd) { WriteStoreOp(2, result, base, op2, RegAdd);}
void ARMXEmitter::WriteRegStoreOp(u32 op, ARMReg dest, bool WriteBack, u16 RegList)
{
Write32(condition | (op << 20) | (WriteBack << 21) | (dest << 16) | RegList);
}
void ARMXEmitter::STMFD(ARMReg dest, bool WriteBack, const int Regnum, ...)
{
u16 RegList = 0;
u8 Reg;
int i;
va_list vl;
va_start(vl, Regnum);
for (i=0;i<Regnum;i++)
{
Reg = va_arg(vl, u32);
RegList |= (1 << Reg);
}
va_end(vl);
WriteRegStoreOp(0x90, dest, WriteBack, RegList);
}
void ARMXEmitter::LDMFD(ARMReg dest, bool WriteBack, const int Regnum, ...)
{
u16 RegList = 0;
u8 Reg;
int i;
va_list vl;
va_start(vl, Regnum);
for (i=0;i<Regnum;i++)
{
Reg = va_arg(vl, u32);
RegList |= (1 << Reg);
}
va_end(vl);
WriteRegStoreOp(0x89, dest, WriteBack, RegList);
}
ARMReg ARMXEmitter::SubBase(ARMReg Reg)
{
if (Reg >= S0)
{
if (Reg >= D0)
{
if (Reg >= Q0)
return (ARMReg)((Reg - Q0) * 2); // Always gets encoded as a double register
return (ARMReg)(Reg - D0);
}
return (ARMReg)(Reg - S0);
}
return Reg;
}
// NEON Specific
void ARMXEmitter::VADD(IntegerSize Size, ARMReg Vd, ARMReg Vn, ARMReg Vm)
{
_assert_msg_(DYNA_REC, Vd >= D0, "Pass invalid register to VADD(integer)");
_assert_msg_(DYNA_REC, cpu_info.bNEON, "Can't use VADD(integer) when CPU doesn't support it");
bool register_quad = Vd >= Q0;
// Gets encoded as a double register
Vd = SubBase(Vd);
Vn = SubBase(Vn);
Vm = SubBase(Vm);
Write32((0xF2 << 24) | ((Vd & 0x10) << 18) | (Size << 20) | ((Vn & 0xF) << 16) \
| ((Vd & 0xF) << 12) | (0x8 << 8) | ((Vn & 0x10) << 3) | (register_quad << 6) \
| ((Vm & 0x10) << 2) | (Vm & 0xF));
}
void ARMXEmitter::VSUB(IntegerSize Size, ARMReg Vd, ARMReg Vn, ARMReg Vm)
{
_assert_msg_(DYNA_REC, Vd >= Q0, "Pass invalid register to VSUB(integer)");
_assert_msg_(DYNA_REC, cpu_info.bNEON, "Can't use VSUB(integer) when CPU doesn't support it");
// Gets encoded as a double register
Vd = SubBase(Vd);
Vn = SubBase(Vn);
Vm = SubBase(Vm);
Write32((0xF3 << 24) | ((Vd & 0x10) << 18) | (Size << 20) | ((Vn & 0xF) << 16) \
| ((Vd & 0xF) << 12) | (0x8 << 8) | ((Vn & 0x10) << 3) | (1 << 6) \
| ((Vm & 0x10) << 2) | (Vm & 0xF));
}
// VFP Specific
struct VFPEnc
{
s16 opc1;
s16 opc2;
};
// Double/single, Neon
const VFPEnc VFPOps[][2] = {
{{0xE0, 0xA0}, {0x20, 0xD1}}, // 0: VMLA
{{0xE0, 0xA4}, {0x22, 0xD1}}, // 1: VMLS
{{0xE3, 0xA0}, {0x20, 0xD0}}, // 2: VADD
{{0xE3, 0xA4}, {0x22, 0xD0}}, // 3: VSUB
{{0xE2, 0xA0}, {0x30, 0xD1}}, // 4: VMUL
{{0xEB, 0xAC}, { -1 /* 0x3B */, -1 /* 0x70 */}}, // 5: VABS(Vn(0x0) used for encoding)
{{0xE8, 0xA0}, { -1, -1}}, // 6: VDIV
{{0xEB, 0xA4}, { -1 /* 0x3B */, -1 /* 0x78 */}}, // 7: VNEG(Vn(0x1) used for encoding)
{{0xEB, 0xAC}, { -1, -1}}, // 8: VSQRT (Vn(0x1) used for encoding)
{{0xEB, 0xA4}, { -1, -1}}, // 9: VCMP (Vn(0x4 | #0 ? 1 : 0) used for encoding)
{{0xEB, 0xAC}, { -1, -1}}, // 10: VCMPE (Vn(0x4 | #0 ? 1 : 0) used for encoding)
{{ -1, -1}, {0x3B, 0x30}}, // 11: VABSi
};
const char *VFPOpNames[] = {
"VMLA",
"VMLS",
"VADD",
"VSUB",
"VMUL",
"VABS",
"VDIV",
"VNEG",
"VSQRT",
"VCMP",
"VCMPE",
"VABSi",
};
u32 ARMXEmitter::EncodeVd(ARMReg Vd)
{
bool quad_reg = Vd >= Q0;
bool double_reg = Vd >= D0;
ARMReg Reg = SubBase(Vd);
if (quad_reg)
return ((Reg & 0x10) << 18) | ((Reg & 0xF) << 12);
else
if (double_reg)
return ((Reg & 0x10) << 18) | ((Reg & 0xF) << 12);
else
return ((Reg & 0x1) << 22) | ((Reg & 0x1E) << 11);
}
u32 ARMXEmitter::EncodeVn(ARMReg Vn)
{
bool quad_reg = Vn >= Q0;
bool double_reg = Vn >= D0;
ARMReg Reg = SubBase(Vn);
if (quad_reg)
return ((Reg & 0xF) << 16) | ((Reg & 0x10) << 3);
else
if (double_reg)
return ((Reg & 0xF) << 16) | ((Reg & 0x10) << 3);
else
return ((Reg & 0x1E) << 15) | ((Reg & 0x1) << 7);
}
u32 ARMXEmitter::EncodeVm(ARMReg Vm)
{
bool quad_reg = Vm >= Q0;
bool double_reg = Vm >= D0;
ARMReg Reg = SubBase(Vm);
if (quad_reg)
return ((Reg & 0x10) << 2) | (Reg & 0xF);
else
if (double_reg)
return ((Reg & 0x10) << 2) | (Reg & 0xF);
else
return ((Reg & 0x1) << 5) | (Reg >> 1);
}
void ARMXEmitter::WriteVFPDataOp(u32 Op, ARMReg Vd, ARMReg Vn, ARMReg Vm)
{
bool quad_reg = Vd >= Q0;
bool double_reg = Vd >= D0 && Vd < Q0;
VFPEnc enc = VFPOps[Op][quad_reg];
if (enc.opc1 == -1 && enc.opc2 == -1)
_assert_msg_(DYNA_REC, false, "%s does not support %s", VFPOpNames[Op], quad_reg ? "NEON" : "VFP");
u32 VdEnc = EncodeVd(Vd);
u32 VnEnc = EncodeVn(Vn);
u32 VmEnc = EncodeVm(Vm);
u32 cond = quad_reg ? (0xF << 28) : condition;
Write32(cond | (enc.opc1 << 20) | VnEnc | VdEnc | (enc.opc2 << 4) | (quad_reg << 6) | (double_reg << 8) | VmEnc);
}
void ARMXEmitter::VMLA(ARMReg Vd, ARMReg Vn, ARMReg Vm){ WriteVFPDataOp(0, Vd, Vn, Vm); }
void ARMXEmitter::VMLS(ARMReg Vd, ARMReg Vn, ARMReg Vm){ WriteVFPDataOp(1, Vd, Vn, Vm); }
void ARMXEmitter::VADD(ARMReg Vd, ARMReg Vn, ARMReg Vm){ WriteVFPDataOp(2, Vd, Vn, Vm); }
void ARMXEmitter::VSUB(ARMReg Vd, ARMReg Vn, ARMReg Vm){ WriteVFPDataOp(3, Vd, Vn, Vm); }
void ARMXEmitter::VMUL(ARMReg Vd, ARMReg Vn, ARMReg Vm){ WriteVFPDataOp(4, Vd, Vn, Vm); }
void ARMXEmitter::VABS(ARMReg Vd, ARMReg Vm){ WriteVFPDataOp(5, Vd, D0, Vm); }
void ARMXEmitter::VDIV(ARMReg Vd, ARMReg Vn, ARMReg Vm){ WriteVFPDataOp(6, Vd, Vn, Vm); }
void ARMXEmitter::VNEG(ARMReg Vd, ARMReg Vm){ WriteVFPDataOp(7, Vd, D1, Vm); }
void ARMXEmitter::VSQRT(ARMReg Vd, ARMReg Vm){ WriteVFPDataOp(8, Vd, D1, Vm); }
void ARMXEmitter::VCMP(ARMReg Vd, ARMReg Vm){ WriteVFPDataOp(9, Vd, D4, Vm); }
void ARMXEmitter::VCMPE(ARMReg Vd, ARMReg Vm){ WriteVFPDataOp(10, Vd, D4, Vm); }
void ARMXEmitter::VCMP(ARMReg Vd){ WriteVFPDataOp(9, Vd, D5, D0); }
void ARMXEmitter::VCMPE(ARMReg Vd){ WriteVFPDataOp(10, Vd, D5, D0); }
void ARMXEmitter::VLDR(ARMReg Dest, ARMReg Base, s16 offset)
{
_assert_msg_(DYNA_REC, Dest >= S0 && Dest <= D31, "Passed Invalid dest register to VLDR");
_assert_msg_(DYNA_REC, Base <= R15, "Passed invalid Base register to VLDR");
bool Add = offset >= 0 ? true : false;
u32 imm = abs(offset);
_assert_msg_(DYNA_REC, (imm & 0xC03) == 0, "VLDR: Offset needs to be word aligned and small enough");
if (imm & 0xC03)
ERROR_LOG(DYNA_REC, "VLDR: Bad offset %08x", imm);
bool single_reg = Dest < D0;
Dest = SubBase(Dest);
if (single_reg)
{
Write32(condition | (0xD << 24) | (Add << 23) | ((Dest & 0x1) << 22) | (1 << 20) | (Base << 16) \
| ((Dest & 0x1E) << 11) | (10 << 8) | (imm >> 2));
}
else
{
Write32(condition | (0xD << 24) | (Add << 23) | ((Dest & 0x10) << 18) | (1 << 20) | (Base << 16) \
| ((Dest & 0xF) << 12) | (11 << 8) | (imm >> 2));
}
}
void ARMXEmitter::VSTR(ARMReg Src, ARMReg Base, s16 offset)
{
_assert_msg_(DYNA_REC, Src >= S0 && Src <= D31, "Passed invalid src register to VSTR");
_assert_msg_(DYNA_REC, Base <= R15, "Passed invalid base register to VSTR");
bool Add = offset >= 0 ? true : false;
u32 imm = abs(offset);
_assert_msg_(DYNA_REC, (imm & 0xC03) == 0, "VSTR: Offset needs to be word aligned and small enough");
if (imm & 0xC03)
ERROR_LOG(DYNA_REC, "VSTR: Bad offset %08x", imm);
bool single_reg = Src < D0;
Src = SubBase(Src);
if (single_reg)
{
Write32(condition | (0xD << 24) | (Add << 23) | ((Src & 0x1) << 22) | (Base << 16) \
| ((Src & 0x1E) << 11) | (10 << 8) | (imm >> 2));
}
else
{
Write32(condition | (0xD << 24) | (Add << 23) | ((Src & 0x10) << 18) | (Base << 16) \
| ((Src & 0xF) << 12) | (11 << 8) | (imm >> 2));
}
}
void ARMXEmitter::VMRS_APSR() {
Write32(condition | 0xEF10A10 | (15 << 12));
}
void ARMXEmitter::VMRS(ARMReg Rt) {
Write32(condition | (0xEF << 20) | (1 << 16) | (Rt << 12) | 0xA10);
}
void ARMXEmitter::VMSR(ARMReg Rt) {
Write32(condition | (0xEE << 20) | (1 << 16) | (Rt << 12) | 0xA10);
}
// VFP and ASIMD
void ARMXEmitter::VMOV(ARMReg Dest, ARMReg Src, bool high)
{
_assert_msg_(DYNA_REC, Src < S0, "This VMOV doesn't support SRC other than ARM Reg");
_assert_msg_(DYNA_REC, Dest >= D0, "This VMOV doesn't support DEST other than VFP");
Dest = SubBase(Dest);
Write32(condition | (0xE << 24) | (high << 21) | ((Dest & 0xF) << 16) | (Src << 12) \
| (11 << 8) | ((Dest & 0x10) << 3) | (1 << 4));
}
void ARMXEmitter::VMOV(ARMReg Dest, ARMReg Src)
{
if (Dest > R15)
{
if (Src < S0)
{
if (Dest < D0)
{
// Moving to a Neon register FROM ARM Reg
Dest = (ARMReg)(Dest - S0);
Write32(condition | (0xE0 << 20) | ((Dest & 0x1E) << 15) | (Src << 12) \
| (0xA << 8) | ((Dest & 0x1) << 7) | (1 << 4));
return;
}
else
{
// Move 64bit from Arm reg
_assert_msg_(DYNA_REC, false, "This VMOV doesn't support moving 64bit ARM to NEON");
return;
}
}
}
else
{
if (Src > R15)
{
if (Src < D0)
{
// Moving to ARM Reg from Neon Register
Src = (ARMReg)(Src - S0);
Write32(condition | (0xE1 << 20) | ((Src & 0x1E) << 15) | (Dest << 12) \
| (0xA << 8) | ((Src & 0x1) << 7) | (1 << 4));
return;
}
else
{
// Move 64bit To Arm reg
_assert_msg_(DYNA_REC, false, "This VMOV doesn't support moving 64bit ARM From NEON");
return;
}
}
else
{
// Move Arm reg to Arm reg
_assert_msg_(DYNA_REC, false, "VMOV doesn't support moving ARM registers");
}
}
// Moving NEON registers
int SrcSize = Src < D0 ? 1 : Src < Q0 ? 2 : 4;
int DestSize = Dest < D0 ? 1 : Dest < Q0 ? 2 : 4;
bool Single = DestSize == 1;
bool Quad = DestSize == 4;
_assert_msg_(DYNA_REC, SrcSize == DestSize, "VMOV doesn't support moving different register sizes");
Dest = SubBase(Dest);
Src = SubBase(Src);
if (Single)
{
Write32(condition | (0x1D << 23) | ((Dest & 0x1) << 22) | (0x3 << 20) | ((Dest & 0x1E) << 11) \
| (0x5 << 9) | (1 << 6) | ((Src & 0x1) << 5) | ((Src & 0x1E) >> 1));
}
else
{
// Double and quad
if (Quad)
{
_assert_msg_(DYNA_REC, cpu_info.bNEON, "Trying to use quad registers when you don't support ASIMD.");
// Gets encoded as a Double register
Write32((0xF2 << 24) | ((Dest & 0x10) << 18) | (2 << 20) | ((Src & 0xF) << 16) \
| ((Dest & 0xF) << 12) | (1 << 8) | ((Src & 0x10) << 3) | (1 << 6) \
| ((Src & 0x10) << 1) | (1 << 4) | (Src & 0xF));
}
else
{
Write32(condition | (0x1D << 23) | ((Dest & 0x10) << 18) | (0x3 << 20) | ((Dest & 0xF) << 12) \
| (0x2D << 6) | ((Src & 0x10) << 1) | (Src & 0xF));
}
}
}
void ARMXEmitter::VCVT(ARMReg Dest, ARMReg Source, int flags)
{
bool single_reg = (Dest < D0) && (Source < D0);
int op = ((flags & TO_INT) ? (flags & ROUND_TO_ZERO) : (flags & IS_SIGNED)) ? 1 : 0;
int op2 = ((flags & TO_INT) ? (flags & IS_SIGNED) : 0) ? 1 : 0;
Dest = SubBase(Dest);
Source = SubBase(Source);
if (single_reg)
{
Write32(condition | (0x1D << 23) | ((Dest & 0x1) << 22) | (0x7 << 19) | ((flags & TO_INT) << 18) | (op2 << 16) \
| ((Dest & 0x1E) << 11) | (op << 7) | (0x29 << 6) | ((Source & 0x1) << 5) | (Source >> 1));
} else {
Write32(condition | (0x1D << 23) | ((Dest & 0x10) << 18) | (0x7 << 19) | ((flags & TO_INT) << 18) | (op2 << 16) \
| ((Dest & 0xF) << 12) | (1 << 8) | (op << 7) | (0x29 << 6) | ((Source & 0x10) << 1) | (Source & 0xF));
}
}
}
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