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dyncom: Make Load/Store instructions support big endian

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This commit is contained in:
Lioncash 2015-03-11 16:10:14 -04:00
parent f280806214
commit 9fdb311d6e
7 changed files with 204 additions and 81 deletions
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96
src/core/arm/dyncom/arm_dyncom_interpreter.cpp
View file

@ -4362,30 +4362,30 @@ unsigned InterpreterMainLoop(ARMul_State* state) {
if (BIT(inst, 22) && !BIT(inst, 15)) {
for (int i = 0; i < 13; i++) {
if(BIT(inst, i)) {
cpu->Reg[i] = Memory::Read32(addr);
cpu->Reg[i] = ReadMemory32(cpu, addr);
addr += 4;
}
}
if (BIT(inst, 13)) {
if (cpu->Mode == USER32MODE)
cpu->Reg[13] = Memory::Read32(addr);
cpu->Reg[13] = ReadMemory32(cpu, addr);
else
cpu->Reg_usr[0] = Memory::Read32(addr);
cpu->Reg_usr[0] = ReadMemory32(cpu, addr);
addr += 4;
}
if (BIT(inst, 14)) {
if (cpu->Mode == USER32MODE)
cpu->Reg[14] = Memory::Read32(addr);
cpu->Reg[14] = ReadMemory32(cpu, addr);
else
cpu->Reg_usr[1] = Memory::Read32(addr);
cpu->Reg_usr[1] = ReadMemory32(cpu, addr);
addr += 4;
}
} else if (!BIT(inst, 22)) {
for(int i = 0; i < 16; i++ ){
if(BIT(inst, i)){
unsigned int ret = Memory::Read32(addr);
unsigned int ret = ReadMemory32(cpu, addr);
// For armv5t, should enter thumb when bits[0] is non-zero.
if(i == 15){
@ -4400,7 +4400,7 @@ unsigned InterpreterMainLoop(ARMul_State* state) {
} else if (BIT(inst, 22) && BIT(inst, 15)) {
for(int i = 0; i < 15; i++ ){
if(BIT(inst, i)){
cpu->Reg[i] = Memory::Read32(addr);
cpu->Reg[i] = ReadMemory32(cpu, addr);
addr += 4;
}
}
@ -4411,7 +4411,7 @@ unsigned InterpreterMainLoop(ARMul_State* state) {
LOAD_NZCVT;
}
cpu->Reg[15] = Memory::Read32(addr);
cpu->Reg[15] = ReadMemory32(cpu, addr);
}
if (BIT(inst, 15)) {
@ -4445,10 +4445,9 @@ unsigned InterpreterMainLoop(ARMul_State* state) {
LDR_INST:
{
ldst_inst *inst_cream = (ldst_inst *)inst_base->component;
//if ((inst_base->cond == 0xe) || CondPassed(cpu, inst_base->cond)) {
inst_cream->get_addr(cpu, inst_cream->inst, addr, 1);
unsigned int value = Memory::Read32(addr);
unsigned int value = ReadMemory32(cpu, addr);
cpu->Reg[BITS(inst_cream->inst, 12, 15)] = value;
if (BITS(inst_cream->inst, 12, 15) == 15) {
@ -4458,7 +4457,6 @@ unsigned InterpreterMainLoop(ARMul_State* state) {
INC_PC(sizeof(ldst_inst));
goto DISPATCH;
}
//}
cpu->Reg[15] += GET_INST_SIZE(cpu);
INC_PC(sizeof(ldst_inst));
@ -4471,7 +4469,7 @@ unsigned InterpreterMainLoop(ARMul_State* state) {
ldst_inst *inst_cream = (ldst_inst *)inst_base->component;
inst_cream->get_addr(cpu, inst_cream->inst, addr, 1);
unsigned int value = Memory::Read32(addr);
unsigned int value = ReadMemory32(cpu, addr);
cpu->Reg[BITS(inst_cream->inst, 12, 15)] = value;
if (BITS(inst_cream->inst, 12, 15) == 15) {
@ -4554,8 +4552,10 @@ unsigned InterpreterMainLoop(ARMul_State* state) {
// Should check if RD is even-numbered, Rd != 14, addr[0:1] == 0, (CP15_reg1_U == 1 || addr[2] == 0)
inst_cream->get_addr(cpu, inst_cream->inst, addr, 1);
cpu->Reg[BITS(inst_cream->inst, 12, 15)] = Memory::Read32(addr);
cpu->Reg[BITS(inst_cream->inst, 12, 15) + 1] = Memory::Read32(addr + 4);
// The 3DS doesn't have LPAE (Large Physical Access Extension), so it
// wouldn't do this as a single read.
cpu->Reg[BITS(inst_cream->inst, 12, 15) + 0] = ReadMemory32(cpu, addr);
cpu->Reg[BITS(inst_cream->inst, 12, 15) + 1] = ReadMemory32(cpu, addr + 4);
// No dispatch since this operation should not modify R15
}
@ -4574,7 +4574,7 @@ unsigned InterpreterMainLoop(ARMul_State* state) {
add_exclusive_addr(cpu, read_addr);
cpu->exclusive_state = 1;
RD = Memory::Read32(read_addr);
RD = ReadMemory32(cpu, read_addr);
if (inst_cream->Rd == 15) {
INC_PC(sizeof(generic_arm_inst));
goto DISPATCH;
@ -4614,7 +4614,7 @@ unsigned InterpreterMainLoop(ARMul_State* state) {
add_exclusive_addr(cpu, read_addr);
cpu->exclusive_state = 1;
RD = Memory::Read16(read_addr);
RD = ReadMemory16(cpu, read_addr);
if (inst_cream->Rd == 15) {
INC_PC(sizeof(generic_arm_inst));
goto DISPATCH;
@ -4634,8 +4634,8 @@ unsigned InterpreterMainLoop(ARMul_State* state) {
add_exclusive_addr(cpu, read_addr);
cpu->exclusive_state = 1;
RD = Memory::Read32(read_addr);
RD2 = Memory::Read32(read_addr + 4);
RD = ReadMemory32(cpu, read_addr);
RD2 = ReadMemory32(cpu, read_addr + 4);
if (inst_cream->Rd == 15) {
INC_PC(sizeof(generic_arm_inst));
@ -4652,7 +4652,8 @@ unsigned InterpreterMainLoop(ARMul_State* state) {
if (inst_base->cond == 0xE || CondPassed(cpu, inst_base->cond)) {
ldst_inst* inst_cream = (ldst_inst*)inst_base->component;
inst_cream->get_addr(cpu, inst_cream->inst, addr, 1);
cpu->Reg[BITS(inst_cream->inst, 12, 15)] = Memory::Read16(addr);
cpu->Reg[BITS(inst_cream->inst, 12, 15)] = ReadMemory16(cpu, addr);
if (BITS(inst_cream->inst, 12, 15) == 15) {
INC_PC(sizeof(ldst_inst));
goto DISPATCH;
@ -4688,7 +4689,8 @@ unsigned InterpreterMainLoop(ARMul_State* state) {
if (inst_base->cond == 0xE || CondPassed(cpu, inst_base->cond)) {
ldst_inst* inst_cream = (ldst_inst*)inst_base->component;
inst_cream->get_addr(cpu, inst_cream->inst, addr, 1);
unsigned int value = Memory::Read16(addr);
unsigned int value = ReadMemory16(cpu, addr);
if (BIT(value, 15)) {
value |= 0xffff0000;
}
@ -4709,7 +4711,7 @@ unsigned InterpreterMainLoop(ARMul_State* state) {
ldst_inst* inst_cream = (ldst_inst*)inst_base->component;
inst_cream->get_addr(cpu, inst_cream->inst, addr, 1);
unsigned int value = Memory::Read32(addr);
unsigned int value = ReadMemory32(cpu, addr);
cpu->Reg[BITS(inst_cream->inst, 12, 15)] = value;
if (BITS(inst_cream->inst, 12, 15) == 15) {
@ -6010,36 +6012,36 @@ unsigned InterpreterMainLoop(ARMul_State* state) {
if (BIT(inst_cream->inst, 22) == 1) {
for (int i = 0; i < 13; i++) {
if (BIT(inst_cream->inst, i)) {
Memory::Write32(addr, cpu->Reg[i]);
WriteMemory32(cpu, addr, cpu->Reg[i]);
addr += 4;
}
}
if (BIT(inst_cream->inst, 13)) {
if (cpu->Mode == USER32MODE)
Memory::Write32(addr, cpu->Reg[13]);
WriteMemory32(cpu, addr, cpu->Reg[13]);
else
Memory::Write32(addr, cpu->Reg_usr[0]);
WriteMemory32(cpu, addr, cpu->Reg_usr[0]);
addr += 4;
}
if (BIT(inst_cream->inst, 14)) {
if (cpu->Mode == USER32MODE)
Memory::Write32(addr, cpu->Reg[14]);
WriteMemory32(cpu, addr, cpu->Reg[14]);
else
Memory::Write32(addr, cpu->Reg_usr[1]);
WriteMemory32(cpu, addr, cpu->Reg_usr[1]);
addr += 4;
}
if (BIT(inst_cream->inst, 15)) {
Memory::Write32(addr, cpu->Reg_usr[1] + 8);
WriteMemory32(cpu, addr, cpu->Reg_usr[1] + 8);
}
} else {
for (int i = 0; i < 15; i++) {
if (BIT(inst_cream->inst, i)) {
if (i == Rn)
Memory::Write32(addr, old_RN);
WriteMemory32(cpu, addr, old_RN);
else
Memory::Write32(addr, cpu->Reg[i]);
WriteMemory32(cpu, addr, cpu->Reg[i]);
addr += 4;
}
@ -6047,7 +6049,7 @@ unsigned InterpreterMainLoop(ARMul_State* state) {
// Check PC reg
if (BIT(inst_cream->inst, 15))
Memory::Write32(addr, cpu->Reg_usr[1] + 8);
WriteMemory32(cpu, addr, cpu->Reg_usr[1] + 8);
}
}
cpu->Reg[15] += GET_INST_SIZE(cpu);
@ -6080,7 +6082,7 @@ unsigned InterpreterMainLoop(ARMul_State* state) {
inst_cream->get_addr(cpu, inst_cream->inst, addr, 0);
unsigned int value = cpu->Reg[BITS(inst_cream->inst, 12, 15)];
Memory::Write32(addr, value);
WriteMemory32(cpu, addr, value);
}
cpu->Reg[15] += GET_INST_SIZE(cpu);
INC_PC(sizeof(ldst_inst));
@ -6143,10 +6145,10 @@ unsigned InterpreterMainLoop(ARMul_State* state) {
ldst_inst* inst_cream = (ldst_inst*)inst_base->component;
inst_cream->get_addr(cpu, inst_cream->inst, addr, 0);
unsigned int value = cpu->Reg[BITS(inst_cream->inst, 12, 15)];
Memory::Write32(addr, value);
value = cpu->Reg[BITS(inst_cream->inst, 12, 15) + 1];
Memory::Write32(addr + 4, value);
// The 3DS doesn't have the Large Physical Access Extension (LPAE)
// so STRD wouldn't store these as a single write.
WriteMemory32(cpu, addr + 0, cpu->Reg[BITS(inst_cream->inst, 12, 15)]);
WriteMemory32(cpu, addr + 4, cpu->Reg[BITS(inst_cream->inst, 12, 15) + 1]);
}
cpu->Reg[15] += GET_INST_SIZE(cpu);
INC_PC(sizeof(ldst_inst));
@ -6163,7 +6165,7 @@ unsigned InterpreterMainLoop(ARMul_State* state) {
remove_exclusive(cpu, write_addr);
cpu->exclusive_state = 0;
Memory::Write32(write_addr, cpu->Reg[inst_cream->Rm]);
WriteMemory32(cpu, write_addr, RM);
RD = 0;
} else {
// Failed to write due to mutex access
@ -6207,8 +6209,16 @@ unsigned InterpreterMainLoop(ARMul_State* state) {
remove_exclusive(cpu, write_addr);
cpu->exclusive_state = 0;
Memory::Write32(write_addr, cpu->Reg[inst_cream->Rm]);
Memory::Write32(write_addr + 4, cpu->Reg[inst_cream->Rm + 1]);
const u32 rt = cpu->Reg[inst_cream->Rm + 0];
const u32 rt2 = cpu->Reg[inst_cream->Rm + 1];
u64 value;
if (InBigEndianMode(cpu))
value = (((u64)rt << 32) | rt2);
else
value = (((u64)rt2 << 32) | rt);
WriteMemory64(cpu, write_addr, value);
RD = 0;
}
else {
@ -6231,7 +6241,7 @@ unsigned InterpreterMainLoop(ARMul_State* state) {
remove_exclusive(cpu, write_addr);
cpu->exclusive_state = 0;
Memory::Write16(write_addr, cpu->Reg[inst_cream->Rm]);
WriteMemory16(cpu, write_addr, RM);
RD = 0;
} else {
// Failed to write due to mutex access
@ -6250,7 +6260,7 @@ unsigned InterpreterMainLoop(ARMul_State* state) {
inst_cream->get_addr(cpu, inst_cream->inst, addr, 0);
unsigned int value = cpu->Reg[BITS(inst_cream->inst, 12, 15)] & 0xffff;
Memory::Write16(addr, value);
WriteMemory16(cpu, addr, value);
}
cpu->Reg[15] += GET_INST_SIZE(cpu);
INC_PC(sizeof(ldst_inst));
@ -6264,7 +6274,7 @@ unsigned InterpreterMainLoop(ARMul_State* state) {
inst_cream->get_addr(cpu, inst_cream->inst, addr, 0);
unsigned int value = cpu->Reg[BITS(inst_cream->inst, 12, 15)];
Memory::Write32(addr, value);
WriteMemory32(cpu, addr, value);
}
cpu->Reg[15] += GET_INST_SIZE(cpu);
INC_PC(sizeof(ldst_inst));
@ -6323,8 +6333,8 @@ unsigned InterpreterMainLoop(ARMul_State* state) {
swp_inst* inst_cream = (swp_inst*)inst_base->component;
addr = RN;
unsigned int value = Memory::Read32(addr);
Memory::Write32(addr, RM);
unsigned int value = ReadMemory32(cpu, addr);
WriteMemory32(cpu, addr, RM);
RD = value;
}

6
src/core/arm/interpreter/armsupp.cpp
View file

@ -201,3 +201,9 @@ u32 ARMul_UnsignedSatQ(s32 value, u8 shift, bool* saturation_occurred)
*saturation_occurred = false;
return (u32)value;
}
// Whether or not the given CPU is in big endian mode (E bit is set)
bool InBigEndianMode(ARMul_State* cpu)
{
return (cpu->Cpsr & (1 << 9)) != 0;
}

3
src/core/arm/skyeye_common/armdefs.h
View file

@ -18,7 +18,6 @@
#pragma once
#include "common/common_types.h"
#include "core/arm/skyeye_common/armmmu.h"
#include "core/arm/skyeye_common/arm_regformat.h"
#include "core/arm/skyeye_common/skyeye_defs.h"
@ -356,3 +355,5 @@ extern u16 ARMul_UnsignedSaturatedSub16(u16, u16);
extern u8 ARMul_UnsignedAbsoluteDifference(u8, u8);
extern u32 ARMul_SignedSatQ(s32, u8, bool*);
extern u32 ARMul_UnsignedSatQ(s32, u8, bool*);
extern bool InBigEndianMode(ARMul_State*);

55
src/core/arm/skyeye_common/armmmu.h
View file

@ -20,6 +20,9 @@
#pragma once
#include "core/mem_map.h"
#include "core/arm/skyeye_common/armdefs.h"
// Register numbers in the MMU
enum
{
@ -54,3 +57,55 @@ enum
XSCALE_CP15_AUX_CONTROL = 1,
XSCALE_CP15_COPRO_ACCESS = 15,
};
// Reads data in big/little endian format based on the
// state of the E (endian) bit in the emulated CPU's APSR.
inline u16 ReadMemory16(ARMul_State* cpu, u32 address) {
u16 data = Memory::Read16(address);
if (InBigEndianMode(cpu))
data = Common::swap16(data);
return data;
}
inline u32 ReadMemory32(ARMul_State* cpu, u32 address) {
u32 data = Memory::Read32(address);
if (InBigEndianMode(cpu))
data = Common::swap32(data);
return data;
}
inline u64 ReadMemory64(ARMul_State* cpu, u32 address) {
u64 data = Memory::Read64(address);
if (InBigEndianMode(cpu))
data = Common::swap64(data);
return data;
}
// Writes data in big/little endian format based on the
// state of the E (endian) bit in the emulated CPU's APSR.
inline void WriteMemory16(ARMul_State* cpu, u32 address, u16 data) {
if (InBigEndianMode(cpu))
data = Common::swap16(data);
Memory::Write16(address, data);
}
inline void WriteMemory32(ARMul_State* cpu, u32 address, u32 data) {
if (InBigEndianMode(cpu))
data = Common::swap32(data);
Memory::Write32(address, data);
}
inline void WriteMemory64(ARMul_State* cpu, u32 address, u64 data) {
if (InBigEndianMode(cpu))
data = Common::swap64(data);
Memory::Write64(address, data);
}

98
src/core/arm/skyeye_common/vfp/vfpinstr.cpp
View file

@ -1388,12 +1388,20 @@ VSTR_INST:
if (inst_cream->single)
{
Memory::Write32(addr, cpu->ExtReg[inst_cream->d]);
WriteMemory32(cpu, addr, cpu->ExtReg[inst_cream->d]);
}
else
{
Memory::Write32(addr, cpu->ExtReg[inst_cream->d*2]);
Memory::Write32(addr + 4, cpu->ExtReg[inst_cream->d*2+1]);
const u32 word1 = cpu->ExtReg[inst_cream->d*2+0];
const u32 word2 = cpu->ExtReg[inst_cream->d*2+1];
if (InBigEndianMode(cpu)) {
WriteMemory32(cpu, addr + 0, word2);
WriteMemory32(cpu, addr + 4, word1);
} else {
WriteMemory32(cpu, addr + 0, word1);
WriteMemory32(cpu, addr + 4, word2);
}
}
}
cpu->Reg[15] += GET_INST_SIZE(cpu);
@ -1447,17 +1455,27 @@ VPUSH_INST:
{
if (inst_cream->single)
{
Memory::Write32(addr, cpu->ExtReg[inst_cream->d+i]);
WriteMemory32(cpu, addr, cpu->ExtReg[inst_cream->d+i]);
addr += 4;
}
else
{
Memory::Write32(addr, cpu->ExtReg[(inst_cream->d+i)*2]);
Memory::Write32(addr + 4, cpu->ExtReg[(inst_cream->d+i)*2 + 1]);
const u32 word1 = cpu->ExtReg[(inst_cream->d+i)*2+0];
const u32 word2 = cpu->ExtReg[(inst_cream->d+i)*2+1];
if (InBigEndianMode(cpu)) {
WriteMemory32(cpu, addr + 0, word2);
WriteMemory32(cpu, addr + 4, word1);
} else {
WriteMemory32(cpu, addr + 0, word1);
WriteMemory32(cpu, addr + 4, word2);
}
addr += 8;
}
}
cpu->Reg[R13] = cpu->Reg[R13] - inst_cream->imm32;
cpu->Reg[R13] -= inst_cream->imm32;
}
cpu->Reg[15] += GET_INST_SIZE(cpu);
INC_PC(sizeof(vpush_inst));
@ -1516,13 +1534,22 @@ VSTM_INST: /* encoding 1 */
{
if (inst_cream->single)
{
Memory::Write32(addr, cpu->ExtReg[inst_cream->d+i]);
WriteMemory32(cpu, addr, cpu->ExtReg[inst_cream->d+i]);
addr += 4;
}
else
{
Memory::Write32(addr, cpu->ExtReg[(inst_cream->d+i)*2]);
Memory::Write32(addr + 4, cpu->ExtReg[(inst_cream->d+i)*2 + 1]);
const u32 word1 = cpu->ExtReg[(inst_cream->d+i)*2+0];
const u32 word2 = cpu->ExtReg[(inst_cream->d+i)*2+1];
if (InBigEndianMode(cpu)) {
WriteMemory32(cpu, addr + 0, word2);
WriteMemory32(cpu, addr + 4, word1);
} else {
WriteMemory32(cpu, addr + 0, word1);
WriteMemory32(cpu, addr + 4, word2);
}
addr += 8;
}
}
@ -1575,8 +1602,6 @@ VPOP_INST:
if ((inst_base->cond == 0xe) || CondPassed(cpu, inst_base->cond)) {
CHECK_VFP_ENABLED;
unsigned int value1, value2;
vpop_inst *inst_cream = (vpop_inst *)inst_base->component;
addr = cpu->Reg[R13];
@ -1585,20 +1610,26 @@ VPOP_INST:
{
if (inst_cream->single)
{
value1 = Memory::Read32(addr);
cpu->ExtReg[inst_cream->d+i] = value1;
cpu->ExtReg[inst_cream->d+i] = ReadMemory32(cpu, addr);
addr += 4;
}
else
{
value1 = Memory::Read32(addr);
value2 = Memory::Read32(addr + 4);
cpu->ExtReg[(inst_cream->d+i)*2] = value1;
cpu->ExtReg[(inst_cream->d+i)*2 + 1] = value2;
const u32 word1 = ReadMemory32(cpu, addr + 0);
const u32 word2 = ReadMemory32(cpu, addr + 4);
if (InBigEndianMode(cpu)) {
cpu->ExtReg[(inst_cream->d+i)*2+0] = word2;
cpu->ExtReg[(inst_cream->d+i)*2+1] = word1;
} else {
cpu->ExtReg[(inst_cream->d+i)*2+0] = word1;
cpu->ExtReg[(inst_cream->d+i)*2+1] = word2;
}
addr += 8;
}
}
cpu->Reg[R13] = cpu->Reg[R13] + inst_cream->imm32;
cpu->Reg[R13] += inst_cream->imm32;
}
cpu->Reg[15] += GET_INST_SIZE(cpu);
INC_PC(sizeof(vpop_inst));
@ -1653,18 +1684,22 @@ VLDR_INST:
if (inst_cream->single)
{
cpu->ExtReg[inst_cream->d] = Memory::Read32(addr);
cpu->ExtReg[inst_cream->d] = ReadMemory32(cpu, addr);
}
else
{
unsigned int word1, word2;
word1 = Memory::Read32(addr);
word2 = Memory::Read32(addr + 4);
const u32 word1 = ReadMemory32(cpu, addr + 0);
const u32 word2 = ReadMemory32(cpu, addr + 4);
cpu->ExtReg[inst_cream->d*2] = word1;
if (InBigEndianMode(cpu)) {
cpu->ExtReg[inst_cream->d*2+0] = word2;
cpu->ExtReg[inst_cream->d*2+1] = word1;
} else {
cpu->ExtReg[inst_cream->d*2+0] = word1;
cpu->ExtReg[inst_cream->d*2+1] = word2;
}
}
}
cpu->Reg[15] += GET_INST_SIZE(cpu);
INC_PC(sizeof(vldr_inst));
FETCH_INST;
@ -1722,13 +1757,22 @@ VLDM_INST:
{
if (inst_cream->single)
{
cpu->ExtReg[inst_cream->d+i] = Memory::Read32(addr);
cpu->ExtReg[inst_cream->d+i] = ReadMemory32(cpu, addr);
addr += 4;
}
else
{
cpu->ExtReg[(inst_cream->d+i)*2] = Memory::Read32(addr);
cpu->ExtReg[(inst_cream->d+i)*2 + 1] = Memory::Read32(addr + 4);
const u32 word1 = ReadMemory32(cpu, addr + 0);
const u32 word2 = ReadMemory32(cpu, addr + 4);
if (InBigEndianMode(cpu)) {
cpu->ExtReg[(inst_cream->d+i)*2+0] = word2;
cpu->ExtReg[(inst_cream->d+i)*2+1] = word1;
} else {
cpu->ExtReg[(inst_cream->d+i)*2+0] = word1;
cpu->ExtReg[(inst_cream->d+i)*2+1] = word2;
}
addr += 8;
}
}

1
src/core/mem_map.h
View file

@ -147,6 +147,7 @@ inline void Write(VAddr addr, T data);
u8 Read8(VAddr addr);
u16 Read16(VAddr addr);
u32 Read32(VAddr addr);
u64 Read64(VAddr addr);
u32 Read8_ZX(VAddr addr);
u32 Read16_ZX(VAddr addr);

6
src/core/mem_map_funcs.cpp
View file

@ -245,6 +245,12 @@ u32 Read32(const VAddr addr) {
return (u32)data;
}
u64 Read64(const VAddr addr) {
u64_le data = 0;
Read<u64_le>(data, addr);
return (u64)data;
}
u32 Read8_ZX(const VAddr addr) {
return (u32)Read8(addr);
}