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-rw-r--r--src/core/arm/dyncom/arm_dyncom_interpreter.cpp117
-rw-r--r--src/core/arm/interpreter/armemu.cpp14
-rw-r--r--src/core/arm/interpreter/armsupp.cpp8
-rw-r--r--src/core/arm/skyeye_common/armdefs.h2
-rw-r--r--src/core/arm/skyeye_common/armemu.h1
5 files changed, 90 insertions, 52 deletions
diff --git a/src/core/arm/dyncom/arm_dyncom_interpreter.cpp b/src/core/arm/dyncom/arm_dyncom_interpreter.cpp
index 7ba82503d..c5e885bcd 100644
--- a/src/core/arm/dyncom/arm_dyncom_interpreter.cpp
+++ b/src/core/arm/dyncom/arm_dyncom_interpreter.cpp
@@ -930,6 +930,8 @@ typedef struct _smlad_inst {
unsigned int Rd;
unsigned int Ra;
unsigned int Rn;
+ unsigned int op1;
+ unsigned int op2;
} smlad_inst;
typedef struct _smla_inst {
@@ -2313,25 +2315,40 @@ ARM_INST_PTR INTERPRETER_TRANSLATE(smla)(unsigned int inst, int index)
return inst_base;
}
-ARM_INST_PTR INTERPRETER_TRANSLATE(smlad)(unsigned int inst, int index){
- arm_inst *inst_base = (arm_inst *)AllocBuffer(sizeof(arm_inst) + sizeof(smlad_inst));
- smlad_inst *inst_cream = (smlad_inst *)inst_base->component;
- inst_base->cond = BITS(inst, 28, 31);
- inst_base->idx = index;
- inst_base->br = NON_BRANCH;
+ARM_INST_PTR INTERPRETER_TRANSLATE(smlad)(unsigned int inst, int index)
+{
+ arm_inst* const inst_base = (arm_inst*)AllocBuffer(sizeof(arm_inst) + sizeof(smlad_inst));
+ smlad_inst* const inst_cream = (smlad_inst*)inst_base->component;
+
+ inst_base->cond = BITS(inst, 28, 31);
+ inst_base->idx = index;
+ inst_base->br = NON_BRANCH;
inst_base->load_r15 = 0;
- inst_cream->m = BIT(inst, 4);
- inst_cream->Rn = BITS(inst, 0, 3);
- inst_cream->Rm = BITS(inst, 8, 11);
- inst_cream->Rd = BITS(inst, 16, 19);
- inst_cream->Ra = BITS(inst, 12, 15);
+ inst_cream->m = BIT(inst, 5);
+ inst_cream->Rn = BITS(inst, 0, 3);
+ inst_cream->Rm = BITS(inst, 8, 11);
+ inst_cream->Rd = BITS(inst, 16, 19);
+ inst_cream->Ra = BITS(inst, 12, 15);
+ inst_cream->op1 = BITS(inst, 20, 22);
+ inst_cream->op2 = BITS(inst, 5, 7);
- if (CHECK_RM )
- inst_base->load_r15 = 1;
return inst_base;
}
+ARM_INST_PTR INTERPRETER_TRANSLATE(smuad)(unsigned int inst, int index)
+{
+ return INTERPRETER_TRANSLATE(smlad)(inst, index);
+}
+ARM_INST_PTR INTERPRETER_TRANSLATE(smusd)(unsigned int inst, int index)
+{
+ return INTERPRETER_TRANSLATE(smlad)(inst, index);
+}
+ARM_INST_PTR INTERPRETER_TRANSLATE(smlsd)(unsigned int inst, int index)
+{
+ return INTERPRETER_TRANSLATE(smlad)(inst, index);
+}
+
ARM_INST_PTR INTERPRETER_TRANSLATE(smlal)(unsigned int inst, int index)
{
arm_inst *inst_base = (arm_inst *)AllocBuffer(sizeof(arm_inst) + sizeof(umlal_inst));
@@ -2355,12 +2372,10 @@ ARM_INST_PTR INTERPRETER_TRANSLATE(smlal)(unsigned int inst, int index)
ARM_INST_PTR INTERPRETER_TRANSLATE(smlalxy)(unsigned int inst, int index) { UNIMPLEMENTED_INSTRUCTION("SMLALXY"); }
ARM_INST_PTR INTERPRETER_TRANSLATE(smlald)(unsigned int inst, int index) { UNIMPLEMENTED_INSTRUCTION("SMLALD"); }
ARM_INST_PTR INTERPRETER_TRANSLATE(smlaw)(unsigned int inst, int index) { UNIMPLEMENTED_INSTRUCTION("SMLAW"); }
-ARM_INST_PTR INTERPRETER_TRANSLATE(smlsd)(unsigned int inst, int index) { UNIMPLEMENTED_INSTRUCTION("SMLSD"); }
ARM_INST_PTR INTERPRETER_TRANSLATE(smlsld)(unsigned int inst, int index) { UNIMPLEMENTED_INSTRUCTION("SMLSLD"); }
ARM_INST_PTR INTERPRETER_TRANSLATE(smmla)(unsigned int inst, int index) { UNIMPLEMENTED_INSTRUCTION("SMMLA"); }
ARM_INST_PTR INTERPRETER_TRANSLATE(smmls)(unsigned int inst, int index) { UNIMPLEMENTED_INSTRUCTION("SMMLS"); }
ARM_INST_PTR INTERPRETER_TRANSLATE(smmul)(unsigned int inst, int index) { UNIMPLEMENTED_INSTRUCTION("SMMUL"); }
-ARM_INST_PTR INTERPRETER_TRANSLATE(smuad)(unsigned int inst, int index) { UNIMPLEMENTED_INSTRUCTION("SMUAD"); }
ARM_INST_PTR INTERPRETER_TRANSLATE(smul)(unsigned int inst, int index)
{
arm_inst *inst_base = (arm_inst *)AllocBuffer(sizeof(arm_inst) + sizeof(smul_inst));
@@ -2423,7 +2438,6 @@ ARM_INST_PTR INTERPRETER_TRANSLATE(smulw)(unsigned int inst, int index)
inst_base->load_r15 = 1;
return inst_base;
}
-ARM_INST_PTR INTERPRETER_TRANSLATE(smusd)(unsigned int inst, int index) { UNIMPLEMENTED_INSTRUCTION("SMUSD"); }
ARM_INST_PTR INTERPRETER_TRANSLATE(srs)(unsigned int inst, int index) { UNIMPLEMENTED_INSTRUCTION("SRS"); }
ARM_INST_PTR INTERPRETER_TRANSLATE(ssat)(unsigned int inst, int index)
{
@@ -5382,44 +5396,59 @@ unsigned InterpreterMainLoop(ARMul_State* state) {
FETCH_INST;
GOTO_NEXT_INST;
}
+
SMLAD_INST:
+ SMLSD_INST:
+ SMUAD_INST:
+ SMUSD_INST:
{
- if ((inst_base->cond == 0xe) || CondPassed(cpu, inst_base->cond)) {
- smlad_inst *inst_cream = (smlad_inst *)inst_base->component;
- long long int rm = cpu->Reg[inst_cream->Rm];
- long long int rn = cpu->Reg[inst_cream->Rn];
- long long int ra = cpu->Reg[inst_cream->Ra];
+ if (inst_base->cond == 0xE || CondPassed(cpu, inst_base->cond)) {
+ smlad_inst* const inst_cream = (smlad_inst*)inst_base->component;
+ const u8 op2 = inst_cream->op2;
- // See SMUAD
- if(inst_cream->Ra == 15)
- CITRA_IGNORE_EXIT(-1);
- int operand2 = (inst_cream->m)? ROTATE_RIGHT_32(rm, 16):rm;
- int half_rn, half_operand2;
+ u32 rm_val = cpu->Reg[inst_cream->Rm];
+ const u32 rn_val = cpu->Reg[inst_cream->Rn];
- half_rn = rn & 0xFFFF;
- half_rn = (half_rn & 0x8000)? (0xFFFF0000|half_rn) : half_rn;
+ if (inst_cream->m)
+ rm_val = (((rm_val & 0xFFFF) << 16) | (rm_val >> 16));
- half_operand2 = operand2 & 0xFFFF;
- half_operand2 = (half_operand2 & 0x8000)? (0xFFFF0000|half_operand2) : half_operand2;
+ const s16 rm_lo = (rm_val & 0xFFFF);
+ const s16 rm_hi = ((rm_val >> 16) & 0xFFFF);
+ const s16 rn_lo = (rn_val & 0xFFFF);
+ const s16 rn_hi = ((rn_val >> 16) & 0xFFFF);
- long long int product1 = half_rn * half_operand2;
+ const u32 product1 = (rn_lo * rm_lo);
+ const u32 product2 = (rn_hi * rm_hi);
- half_rn = (rn & 0xFFFF0000) >> 16;
- half_rn = (half_rn & 0x8000)? (0xFFFF0000|half_rn) : half_rn;
+ // SMUAD and SMLAD
+ if (BIT(op2, 1) == 0) {
+ RD = (product1 + product2);
- half_operand2 = (operand2 & 0xFFFF0000) >> 16;
- half_operand2 = (half_operand2 & 0x8000)? (0xFFFF0000|half_operand2) : half_operand2;
+ if (inst_cream->Ra != 15) {
+ RD += cpu->Reg[inst_cream->Ra];
- long long int product2 = half_rn * half_operand2;
+ if (ARMul_AddOverflowQ(product1 + product2, cpu->Reg[inst_cream->Ra]))
+ cpu->Cpsr |= (1 << 27);
+ }
- long long int signed_ra = (ra & 0x80000000)? (0xFFFFFFFF00000000LL) | ra : ra;
- long long int result = product1 + product2 + signed_ra;
- cpu->Reg[inst_cream->Rd] = result & 0xFFFFFFFF;
+ if (ARMul_AddOverflowQ(product1, product2))
+ cpu->Cpsr |= (1 << 27);
+ }
+ // SMUSD and SMLSD
+ else {
+ RD = (product1 - product2);
- // TODO: FIXME should check Signed overflow
+ if (inst_cream->Ra != 15) {
+ RD += cpu->Reg[inst_cream->Ra];
+
+ if (ARMul_AddOverflowQ(product1 - product2, cpu->Reg[inst_cream->Ra]))
+ cpu->Cpsr |= (1 << 27);
+ }
+ }
}
+
cpu->Reg[15] += GET_INST_SIZE(cpu);
- INC_PC(sizeof(umlal_inst));
+ INC_PC(sizeof(smlad_inst));
FETCH_INST;
GOTO_NEXT_INST;
}
@@ -5452,15 +5481,15 @@ unsigned InterpreterMainLoop(ARMul_State* state) {
FETCH_INST;
GOTO_NEXT_INST;
}
+
SMLALXY_INST:
SMLALD_INST:
SMLAW_INST:
- SMLSD_INST:
SMLSLD_INST:
SMMLA_INST:
SMMLS_INST:
SMMUL_INST:
- SMUAD_INST:
+
SMUL_INST:
{
if ((inst_base->cond == 0xe) || CondPassed(cpu, inst_base->cond)) {
@@ -5528,8 +5557,8 @@ unsigned InterpreterMainLoop(ARMul_State* state) {
GOTO_NEXT_INST;
}
- SMUSD_INST:
SRS_INST:
+
SSAT_INST:
{
if (inst_base->cond == 0xE || CondPassed(cpu, inst_base->cond)) {
diff --git a/src/core/arm/interpreter/armemu.cpp b/src/core/arm/interpreter/armemu.cpp
index 43b1ba40e..12166bf79 100644
--- a/src/core/arm/interpreter/armemu.cpp
+++ b/src/core/arm/interpreter/armemu.cpp
@@ -6470,17 +6470,23 @@ L_stm_s_takeabort:
if (BITS(12, 15) != 15) {
state->Reg[rd_idx] += state->Reg[ra_idx];
- ARMul_AddOverflowQ(state, product1 + product2, state->Reg[ra_idx]);
+ if (ARMul_AddOverflowQ(product1 + product2, state->Reg[ra_idx]))
+ SETQ;
}
- ARMul_AddOverflowQ(state, product1, product2);
+ if (ARMul_AddOverflowQ(product1, product2))
+ SETQ;
}
// SMUSD and SMLSD
else {
state->Reg[rd_idx] = product1 - product2;
-
- if (BITS(12, 15) != 15)
+
+ if (BITS(12, 15) != 15) {
state->Reg[rd_idx] += state->Reg[ra_idx];
+
+ if (ARMul_AddOverflowQ(product1 - product2, state->Reg[ra_idx]))
+ SETQ;
+ }
}
return 1;
diff --git a/src/core/arm/interpreter/armsupp.cpp b/src/core/arm/interpreter/armsupp.cpp
index 426b67831..eec34143e 100644
--- a/src/core/arm/interpreter/armsupp.cpp
+++ b/src/core/arm/interpreter/armsupp.cpp
@@ -453,12 +453,14 @@ ARMul_AddOverflow (ARMul_State * state, ARMword a, ARMword b, ARMword result)
ASSIGNV (AddOverflow (a, b, result));
}
-/* Assigns the Q flag if the given result is considered an overflow from the addition of a and b */
-void ARMul_AddOverflowQ(ARMul_State* state, ARMword a, ARMword b)
+// Returns true if the Q flag should be set as a result of overflow.
+bool ARMul_AddOverflowQ(ARMword a, ARMword b)
{
u32 result = a + b;
if (((result ^ a) & (u32)0x80000000) && ((a ^ b) & (u32)0x80000000) == 0)
- SETQ;
+ return true;
+
+ return false;
}
/* Assigns the C flag after an subtraction of a and b to give result. */
diff --git a/src/core/arm/skyeye_common/armdefs.h b/src/core/arm/skyeye_common/armdefs.h
index 8611d7392..c2c78cd5a 100644
--- a/src/core/arm/skyeye_common/armdefs.h
+++ b/src/core/arm/skyeye_common/armdefs.h
@@ -790,6 +790,8 @@ extern void ARMul_FixSPSR(ARMul_State*, ARMword, ARMword);
extern void ARMul_ConsolePrint(ARMul_State*, const char*, ...);
extern void ARMul_SelectProcessor(ARMul_State*, unsigned);
+extern bool ARMul_AddOverflowQ(ARMword, ARMword);
+
extern u8 ARMul_SignedSaturatedAdd8(u8, u8);
extern u8 ARMul_SignedSaturatedSub8(u8, u8);
extern u16 ARMul_SignedSaturatedAdd16(u16, u16);
diff --git a/src/core/arm/skyeye_common/armemu.h b/src/core/arm/skyeye_common/armemu.h
index 3ea14b5a3..e1b286f0f 100644
--- a/src/core/arm/skyeye_common/armemu.h
+++ b/src/core/arm/skyeye_common/armemu.h
@@ -602,7 +602,6 @@ extern ARMword ARMul_SwitchMode (ARMul_State *, ARMword, ARMword);
extern void ARMul_MSRCpsr (ARMul_State *, ARMword, ARMword);
extern void ARMul_SubOverflow (ARMul_State *, ARMword, ARMword, ARMword);
extern void ARMul_AddOverflow (ARMul_State *, ARMword, ARMword, ARMword);
-extern void ARMul_AddOverflowQ(ARMul_State*, ARMword, ARMword);
extern void ARMul_SubCarry (ARMul_State *, ARMword, ARMword, ARMword);
extern void ARMul_AddCarry (ARMul_State *, ARMword, ARMword, ARMword);
extern tdstate ARMul_ThumbDecode (ARMul_State *, ARMword, ARMword, ARMword *);
generated by cgit v1.2.3 (git 2.25.1) at 2025-10-31 03:23:14 +0000