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-rw-r--r--src/core/arm/dyncom/arm_dyncom_interpreter.cpp111
-rw-r--r--src/core/arm/interpreter/armsupp.cpp20
-rw-r--r--src/core/arm/skyeye_common/armdefs.h5
-rw-r--r--src/core/arm/skyeye_common/armemu.h6
4 files changed, 117 insertions, 25 deletions
diff --git a/src/core/arm/dyncom/arm_dyncom_interpreter.cpp b/src/core/arm/dyncom/arm_dyncom_interpreter.cpp
index e3a8b1f6e..30f68f47a 100644
--- a/src/core/arm/dyncom/arm_dyncom_interpreter.cpp
+++ b/src/core/arm/dyncom/arm_dyncom_interpreter.cpp
@@ -2053,7 +2053,37 @@ ARM_INST_PTR INTERPRETER_TRANSLATE(pld)(unsigned int inst, int index)
return inst_base;
}
-ARM_INST_PTR INTERPRETER_TRANSLATE(qadd)(unsigned int inst, int index) { UNIMPLEMENTED_INSTRUCTION("QADD"); }
+
+ARM_INST_PTR INTERPRETER_TRANSLATE(qadd)(unsigned int inst, int index)
+{
+ arm_inst* const inst_base = (arm_inst*)AllocBuffer(sizeof(arm_inst) + sizeof(generic_arm_inst));
+ generic_arm_inst* const inst_cream = (generic_arm_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->op1 = BITS(inst, 21, 22);
+ inst_cream->Rm = BITS(inst, 0, 3);
+ inst_cream->Rn = BITS(inst, 16, 19);
+ inst_cream->Rd = BITS(inst, 12, 15);
+
+ return inst_base;
+}
+ARM_INST_PTR INTERPRETER_TRANSLATE(qdadd)(unsigned int inst, int index)
+{
+ return INTERPRETER_TRANSLATE(qadd)(inst, index);
+}
+ARM_INST_PTR INTERPRETER_TRANSLATE(qdsub)(unsigned int inst, int index)
+{
+ return INTERPRETER_TRANSLATE(qadd)(inst, index);
+}
+ARM_INST_PTR INTERPRETER_TRANSLATE(qsub)(unsigned int inst, int index)
+{
+ return INTERPRETER_TRANSLATE(qadd)(inst, index);
+}
+
ARM_INST_PTR INTERPRETER_TRANSLATE(qadd8)(unsigned int inst, int index)
{
arm_inst* const inst_base = (arm_inst*)AllocBuffer(sizeof(arm_inst) + sizeof(generic_arm_inst));
@@ -2080,9 +2110,6 @@ ARM_INST_PTR INTERPRETER_TRANSLATE(qaddsubx)(unsigned int inst, int index)
{
return INTERPRETER_TRANSLATE(qadd8)(inst, index);
}
-ARM_INST_PTR INTERPRETER_TRANSLATE(qdadd)(unsigned int inst, int index) { UNIMPLEMENTED_INSTRUCTION("QDADD"); }
-ARM_INST_PTR INTERPRETER_TRANSLATE(qdsub)(unsigned int inst, int index) { UNIMPLEMENTED_INSTRUCTION("QDSUB"); }
-ARM_INST_PTR INTERPRETER_TRANSLATE(qsub)(unsigned int inst, int index) { UNIMPLEMENTED_INSTRUCTION("QSUB"); }
ARM_INST_PTR INTERPRETER_TRANSLATE(qsub8)(unsigned int inst, int index)
{
return INTERPRETER_TRANSLATE(qadd8)(inst, index);
@@ -5042,6 +5069,78 @@ unsigned InterpreterMainLoop(ARMul_State* state) {
}
QADD_INST:
+ QDADD_INST:
+ QDSUB_INST:
+ QSUB_INST:
+ {
+ if (inst_base->cond == 0xE || CondPassed(cpu, inst_base->cond)) {
+ generic_arm_inst* const inst_cream = (generic_arm_inst*)inst_base->component;
+ const u8 op1 = inst_cream->op1;
+ const u32 rm_val = RM;
+ const u32 rn_val = RN;
+
+ u32 result = 0;
+
+ // QADD
+ if (op1 == 0x00) {
+ result = rm_val + rn_val;
+
+ if (AddOverflow(rm_val, rn_val, result)) {
+ result = POS(result) ? 0x80000000 : 0x7FFFFFFF;
+ cpu->Cpsr |= (1 << 27);
+ }
+ }
+ // QSUB
+ else if (op1 == 0x01) {
+ result = rm_val - rn_val;
+
+ if (SubOverflow(rm_val, rn_val, result)) {
+ result = POS(result) ? 0x80000000 : 0x7FFFFFFF;
+ cpu->Cpsr |= (1 << 27);
+ }
+ }
+ // QDADD
+ else if (op1 == 0x02) {
+ u32 mul = (rn_val * 2);
+
+ if (AddOverflow(rn_val, rn_val, rn_val * 2)) {
+ mul = POS(mul) ? 0x80000000 : 0x7FFFFFFF;
+ cpu->Cpsr |= (1 << 27);
+ }
+
+ result = mul + rm_val;
+
+ if (AddOverflow(rm_val, mul, result)) {
+ result = POS(result) ? 0x80000000 : 0x7FFFFFFF;
+ cpu->Cpsr |= (1 << 27);
+ }
+ }
+ // QDSUB
+ else if (op1 == 0x03) {
+ u32 mul = (rn_val * 2);
+
+ if (AddOverflow(rn_val, rn_val, mul)) {
+ mul = POS(mul) ? 0x80000000 : 0x7FFFFFFF;
+ cpu->Cpsr |= (1 << 27);
+ }
+
+ result = rm_val - mul;
+
+ if (SubOverflow(rm_val, mul, result)) {
+ result = POS(result) ? 0x80000000 : 0x7FFFFFFF;
+ cpu->Cpsr |= (1 << 27);
+ }
+ }
+
+ RD = result;
+ }
+
+ cpu->Reg[15] += GET_INST_SIZE(cpu);
+ INC_PC(sizeof(generic_arm_inst));
+ FETCH_INST;
+ GOTO_NEXT_INST;
+ }
+
QADD8_INST:
QADD16_INST:
QADDSUBX_INST:
@@ -5104,10 +5203,6 @@ unsigned InterpreterMainLoop(ARMul_State* state) {
GOTO_NEXT_INST;
}
- QDADD_INST:
- QDSUB_INST:
- QSUB_INST:
-
REV_INST:
REV16_INST:
REVSH_INST:
diff --git a/src/core/arm/interpreter/armsupp.cpp b/src/core/arm/interpreter/armsupp.cpp
index eec34143e..68ac2a0ce 100644
--- a/src/core/arm/interpreter/armsupp.cpp
+++ b/src/core/arm/interpreter/armsupp.cpp
@@ -418,22 +418,18 @@ ARMul_NegZero (ARMul_State * state, ARMword result)
}
}
-/* Compute whether an addition of A and B, giving RESULT, overflowed. */
-
-int
-AddOverflow (ARMword a, ARMword b, ARMword result)
+// Compute whether an addition of A and B, giving RESULT, overflowed.
+bool AddOverflow(ARMword a, ARMword b, ARMword result)
{
- return ((NEG (a) && NEG (b) && POS (result))
- || (POS (a) && POS (b) && NEG (result)));
+ return ((NEG(a) && NEG(b) && POS(result)) ||
+ (POS(a) && POS(b) && NEG(result)));
}
-/* Compute whether a subtraction of A and B, giving RESULT, overflowed. */
-
-int
-SubOverflow (ARMword a, ARMword b, ARMword result)
+// Compute whether a subtraction of A and B, giving RESULT, overflowed.
+bool SubOverflow(ARMword a, ARMword b, ARMword result)
{
- return ((NEG (a) && POS (b) && POS (result))
- || (POS (a) && NEG (b) && NEG (result)));
+ return ((NEG(a) && POS(b) && POS(result)) ||
+ (POS(a) && NEG(b) && NEG(result)));
}
/* Assigns the C flag after an addition 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 c2c78cd5a..3100d7adc 100644
--- a/src/core/arm/skyeye_common/armdefs.h
+++ b/src/core/arm/skyeye_common/armdefs.h
@@ -70,6 +70,9 @@
#define DATACACHE 1
#define INSTCACHE 2
+#define POS(i) ( (~(i)) >> 31 )
+#define NEG(i) ( (i) >> 31 )
+
#ifndef __STDC__
typedef char *VoidStar;
#endif
@@ -783,6 +786,8 @@ RUn %x,%x,%x,%x,%x,%x,%x,%x,%x,%x,%x,%x,%x,%x,%x,%x\n",\
//#define PXA250 0x69052903
// 0x69052903; //PXA250 B1 from intel 278522-001.pdf
+extern bool AddOverflow(ARMword, ARMword, ARMword);
+extern bool SubOverflow(ARMword, ARMword, ARMword);
extern void ARMul_UndefInstr(ARMul_State*, ARMword);
extern void ARMul_FixCPSR(ARMul_State*, ARMword, ARMword);
diff --git a/src/core/arm/skyeye_common/armemu.h b/src/core/arm/skyeye_common/armemu.h
index e1b286f0f..1dfcc635a 100644
--- a/src/core/arm/skyeye_common/armemu.h
+++ b/src/core/arm/skyeye_common/armemu.h
@@ -42,9 +42,6 @@
#define R15FBIT (1L << 26)
#define R15IFBITS (3L << 26)
-#define POS(i) ( (~(i)) >> 31 )
-#define NEG(i) ( (i) >> 31 )
-
#ifdef MODET /* Thumb support. */
/* ??? This bit is actually in the low order bit of the PC in the hardware.
It isn't clear if the simulator needs to model that or not. */
@@ -561,8 +558,7 @@ tdstate;
/* Prototypes for exported functions. */
extern unsigned ARMul_NthReg (ARMword, unsigned);
-extern int AddOverflow (ARMword, ARMword, ARMword);
-extern int SubOverflow (ARMword, ARMword, ARMword);
+
/* Prototypes for exported functions. */
#ifdef __cplusplus
extern "C" {
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-22 14:32:01 +0100