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-rw-r--r--src/core/arm/dyncom/arm_dyncom_dec.cpp19
-rw-r--r--src/core/arm/dyncom/arm_dyncom_dec.h10
-rw-r--r--src/core/arm/dyncom/arm_dyncom_interpreter.cpp19
-rw-r--r--src/core/arm/dyncom/arm_dyncom_thumb.cpp20
-rw-r--r--src/core/arm/dyncom/arm_dyncom_thumb.h13
5 files changed, 40 insertions, 41 deletions
diff --git a/src/core/arm/dyncom/arm_dyncom_dec.cpp b/src/core/arm/dyncom/arm_dyncom_dec.cpp
index 3ab9f2c17..48fc1c683 100644
--- a/src/core/arm/dyncom/arm_dyncom_dec.cpp
+++ b/src/core/arm/dyncom/arm_dyncom_dec.cpp
@@ -414,14 +414,13 @@ const ISEITEM arm_exclusion_code[] = {
{ "invalid", 0, INVALID, { 0 }}
};
-int decode_arm_instr(u32 instr, s32* idx) {
+ARMDecodeStatus DecodeARMInstruction(u32 instr, s32* idx) {
int n = 0;
int base = 0;
- int ret = DECODE_FAILURE;
- int i = 0;
int instr_slots = sizeof(arm_instruction) / sizeof(ISEITEM);
+ ARMDecodeStatus ret = ARMDecodeStatus::FAILURE;
- for (i = 0; i < instr_slots; i++) {
+ for (int i = 0; i < instr_slots; i++) {
n = arm_instruction[i].attribute_value;
base = 0;
@@ -438,11 +437,11 @@ int decode_arm_instr(u32 instr, s32* idx) {
n--;
}
- // All conditions is satisfied.
+ // All conditions are satisfied.
if (n == 0)
- ret = DECODE_SUCCESS;
+ ret = ARMDecodeStatus::SUCCESS;
- if (ret == DECODE_SUCCESS) {
+ if (ret == ARMDecodeStatus::SUCCESS) {
n = arm_exclusion_code[i].attribute_value;
if (n != 0) {
base = 0;
@@ -454,13 +453,13 @@ int decode_arm_instr(u32 instr, s32* idx) {
n--;
}
- // All conditions is satisfied.
+ // All conditions are satisfied.
if (n == 0)
- ret = DECODE_FAILURE;
+ ret = ARMDecodeStatus::FAILURE;
}
}
- if (ret == DECODE_SUCCESS) {
+ if (ret == ARMDecodeStatus::SUCCESS) {
*idx = i;
return ret;
}
diff --git a/src/core/arm/dyncom/arm_dyncom_dec.h b/src/core/arm/dyncom/arm_dyncom_dec.h
index 5f6279627..80d910218 100644
--- a/src/core/arm/dyncom/arm_dyncom_dec.h
+++ b/src/core/arm/dyncom/arm_dyncom_dec.h
@@ -6,13 +6,13 @@
#include "common/common_types.h"
-int decode_arm_instr(u32 instr, s32* idx);
-
-enum DECODE_STATUS {
- DECODE_SUCCESS,
- DECODE_FAILURE
+enum class ARMDecodeStatus {
+ SUCCESS,
+ FAILURE
};
+ARMDecodeStatus DecodeARMInstruction(u32 instr, s32* idx);
+
struct instruction_set_encoding_item {
const char *name;
int attribute_value;
diff --git a/src/core/arm/dyncom/arm_dyncom_interpreter.cpp b/src/core/arm/dyncom/arm_dyncom_interpreter.cpp
index cdef72be6..d022546ed 100644
--- a/src/core/arm/dyncom/arm_dyncom_interpreter.cpp
+++ b/src/core/arm/dyncom/arm_dyncom_interpreter.cpp
@@ -3468,10 +3468,10 @@ enum {
FETCH_FAILURE
};
-static tdstate decode_thumb_instr(u32 inst, u32 addr, u32* arm_inst, u32* inst_size, ARM_INST_PTR* ptr_inst_base) {
+static ThumbDecodeStatus DecodeThumbInstruction(u32 inst, u32 addr, u32* arm_inst, u32* inst_size, ARM_INST_PTR* ptr_inst_base) {
// Check if in Thumb mode
- tdstate ret = thumb_translate (addr, inst, arm_inst, inst_size);
- if (ret == t_branch) {
+ ThumbDecodeStatus ret = TranslateThumbInstruction (addr, inst, arm_inst, inst_size);
+ if (ret == ThumbDecodeStatus::BRANCH) {
int inst_index;
int table_length = sizeof(arm_instruction_trans) / sizeof(transop_fp_t);
u32 tinstr = GetThumbInstruction(inst, addr);
@@ -3509,7 +3509,7 @@ static tdstate decode_thumb_instr(u32 inst, u32 addr, u32* arm_inst, u32* inst_s
*ptr_inst_base = arm_instruction_trans[inst_index](tinstr, inst_index);
break;
default:
- ret = t_undefined;
+ ret = ThumbDecodeStatus::UNDEFINED;
break;
}
}
@@ -3542,20 +3542,19 @@ static int InterpreterTranslate(ARMul_State* cpu, int& bb_start, u32 addr) {
inst = Memory::Read32(phys_addr & 0xFFFFFFFC);
size++;
- // If we are in thumb instruction, we will translate one thumb to one corresponding arm instruction
+ // If we are in Thumb mode, we'll translate one Thumb instruction to the corresponding ARM instruction
if (cpu->TFlag) {
uint32_t arm_inst;
- tdstate state = decode_thumb_instr(inst, phys_addr, &arm_inst, &inst_size, &inst_base);
+ ThumbDecodeStatus state = DecodeThumbInstruction(inst, phys_addr, &arm_inst, &inst_size, &inst_base);
- // We have translated the branch instruction of thumb in thumb decoder
- if(state == t_branch){
+ // We have translated the Thumb branch instruction in the Thumb decoder
+ if (state == ThumbDecodeStatus::BRANCH) {
goto translated;
}
inst = arm_inst;
}
- ret = decode_arm_instr(inst, &idx);
- if (ret == DECODE_FAILURE) {
+ if (DecodeARMInstruction(inst, &idx) == ARMDecodeStatus::FAILURE) {
std::string disasm = ARM_Disasm::Disassemble(phys_addr, inst);
LOG_ERROR(Core_ARM11, "Decode failure.\tPC : [0x%x]\tInstruction : %s [%x]", phys_addr, disasm.c_str(), inst);
LOG_ERROR(Core_ARM11, "cpsr=0x%x, cpu->TFlag=%d, r15=0x%x", cpu->Cpsr, cpu->TFlag, cpu->Reg[15]);
diff --git a/src/core/arm/dyncom/arm_dyncom_thumb.cpp b/src/core/arm/dyncom/arm_dyncom_thumb.cpp
index 6eb03fb5a..29272fd5d 100644
--- a/src/core/arm/dyncom/arm_dyncom_thumb.cpp
+++ b/src/core/arm/dyncom/arm_dyncom_thumb.cpp
@@ -12,8 +12,8 @@
// with the following Thumb instruction held in the high 16-bits. Passing in two Thumb instructions
// allows easier simulation of the special dual BL instruction.
-tdstate thumb_translate(u32 addr, u32 instr, u32* ainstr, u32* inst_size) {
- tdstate valid = t_uninitialized;
+ThumbDecodeStatus TranslateThumbInstruction(u32 addr, u32 instr, u32* ainstr, u32* inst_size) {
+ ThumbDecodeStatus valid = ThumbDecodeStatus::UNINITIALIZED;
u32 tinstr = GetThumbInstruction(instr, addr);
*ainstr = 0xDEADC0DE; // Debugging to catch non updates
@@ -351,21 +351,21 @@ tdstate thumb_translate(u32 addr, u32 instr, u32* ainstr, u32* inst_size) {
else
*ainstr |= (tinstr & 0x00FF);
} else if ((tinstr & 0x0F00) != 0x0E00)
- valid = t_branch;
+ valid = ThumbDecodeStatus::BRANCH;
else // UNDEFINED : cc=1110(AL) uses different format
- valid = t_undefined;
+ valid = ThumbDecodeStatus::UNDEFINED;
break;
case 28: // B
- valid = t_branch;
+ valid = ThumbDecodeStatus::BRANCH;
break;
case 29:
- if(tinstr & 0x1)
- valid = t_undefined;
+ if (tinstr & 0x1)
+ valid = ThumbDecodeStatus::UNDEFINED;
else
- valid = t_branch;
+ valid = ThumbDecodeStatus::BRANCH;
break;
case 30: // BL instruction 1
@@ -374,7 +374,7 @@ tdstate thumb_translate(u32 addr, u32 instr, u32* ainstr, u32* inst_size) {
// simulation simple (from the user perspective) we check if the following instruction is
// the second half of this BL, and if it is we simulate it immediately
- valid = t_branch;
+ valid = ThumbDecodeStatus::BRANCH;
break;
case 31: // BL instruction 2
@@ -383,7 +383,7 @@ tdstate thumb_translate(u32 addr, u32 instr, u32* ainstr, u32* inst_size) {
// ever be matched with the fmt19 "BL instruction 1" instruction. However, we do allow the
// simulation of it on its own, with undefined results if r14 is not suitably initialised.
- valid = t_branch;
+ valid = ThumbDecodeStatus::BRANCH;
break;
}
diff --git a/src/core/arm/dyncom/arm_dyncom_thumb.h b/src/core/arm/dyncom/arm_dyncom_thumb.h
index 74e69e13a..447974363 100644
--- a/src/core/arm/dyncom/arm_dyncom_thumb.h
+++ b/src/core/arm/dyncom/arm_dyncom_thumb.h
@@ -28,14 +28,15 @@
#include "common/common_types.h"
-enum tdstate {
- t_undefined, // Undefined Thumb instruction
- t_decoded, // Instruction decoded to ARM equivalent
- t_branch, // Thumb branch (already processed)
- t_uninitialized,
+enum class ThumbDecodeStatus {
+ UNDEFINED, // Undefined Thumb instruction
+ DECODED, // Instruction decoded to ARM equivalent
+ BRANCH, // Thumb branch (already processed)
+ UNINITIALIZED,
};
-tdstate thumb_translate(u32 addr, u32 instr, u32* ainstr, u32* inst_size);
+// Translates a Thumb mode instruction into its ARM equivalent.
+ThumbDecodeStatus TranslateThumbInstruction(u32 addr, u32 instr, u32* ainstr, u32* inst_size);
static inline u32 GetThumbInstruction(u32 instr, u32 address) {
// Normally you would need to handle instruction endianness,
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-13 04:43:44 +0100