diff options
| -rw-r--r-- | src/core/arm/dyncom/arm_dyncom_interpreter.cpp | 54 | ||||
| -rw-r--r-- | src/core/arm/skyeye_common/armdefs.h | 1 | ||||
| -rw-r--r-- | src/core/arm/skyeye_common/armemu.h | 1 |
3 files changed, 53 insertions, 3 deletions
diff --git a/src/core/arm/dyncom/arm_dyncom_interpreter.cpp b/src/core/arm/dyncom/arm_dyncom_interpreter.cpp index 7306794fe..98d825272 100644 --- a/src/core/arm/dyncom/arm_dyncom_interpreter.cpp +++ b/src/core/arm/dyncom/arm_dyncom_interpreter.cpp @@ -3287,8 +3287,28 @@ ARM_INST_PTR INTERPRETER_TRANSLATE(uqsubaddx)(unsigned int inst, int index) { return INTERPRETER_TRANSLATE(uqadd8)(inst, index); } -ARM_INST_PTR INTERPRETER_TRANSLATE(usad8)(unsigned int inst, int index) { UNIMPLEMENTED_INSTRUCTION("USAD8"); } -ARM_INST_PTR INTERPRETER_TRANSLATE(usada8)(unsigned int inst, int index) { UNIMPLEMENTED_INSTRUCTION("USADA8"); } +ARM_INST_PTR INTERPRETER_TRANSLATE(usada8)(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, 20, 24); + inst_cream->op2 = BITS(inst, 5, 7); + inst_cream->Rm = BITS(inst, 8, 11); + inst_cream->Rn = BITS(inst, 0, 3); + inst_cream->Ra = BITS(inst, 12, 15); + + return inst_base; +} +ARM_INST_PTR INTERPRETER_TRANSLATE(usad8)(unsigned int inst, int index) +{ + return INTERPRETER_TRANSLATE(usada8)(inst, index); +} ARM_INST_PTR INTERPRETER_TRANSLATE(usat)(unsigned int inst, int index) { UNIMPLEMENTED_INSTRUCTION("USAT"); } ARM_INST_PTR INTERPRETER_TRANSLATE(usat16)(unsigned int inst, int index) { UNIMPLEMENTED_INSTRUCTION("USAT16"); } ARM_INST_PTR INTERPRETER_TRANSLATE(usub16)(unsigned int inst, int index) { UNIMPLEMENTED_INSTRUCTION("USUB16"); } @@ -6973,6 +6993,36 @@ unsigned InterpreterMainLoop(ARMul_State* state) USAD8_INST: USADA8_INST: + { + INC_ICOUNTER; + + if (inst_base->cond == 0xE || CondPassed(cpu, inst_base->cond)) { + generic_arm_inst* inst_cream = (generic_arm_inst*)inst_base->component; + + const u8 ra_idx = inst_cream->Ra; + const u32 rm_val = RM; + const u32 rn_val = RN; + + const u8 diff1 = ARMul_UnsignedAbsoluteDifference(rn_val & 0xFF, rm_val & 0xFF); + const u8 diff2 = ARMul_UnsignedAbsoluteDifference((rn_val >> 8) & 0xFF, (rm_val >> 8) & 0xFF); + const u8 diff3 = ARMul_UnsignedAbsoluteDifference((rn_val >> 16) & 0xFF, (rm_val >> 16) & 0xFF); + const u8 diff4 = ARMul_UnsignedAbsoluteDifference((rn_val >> 24) & 0xFF, (rm_val >> 24) & 0xFF); + + u32 finalDif = (diff1 + diff2 + diff3 + diff4); + + // Op is USADA8 if true. + if (ra_idx != 15) + finalDif += cpu->Reg[ra_idx]; + + RD = finalDif; + } + + cpu->Reg[15] += GET_INST_SIZE(cpu); + INC_PC(sizeof(generic_arm_inst)); + FETCH_INST; + GOTO_NEXT_INST; + } + USAT_INST: USAT16_INST: USUB16_INST: diff --git a/src/core/arm/skyeye_common/armdefs.h b/src/core/arm/skyeye_common/armdefs.h index 5b6e5f8cd..c7509fcb2 100644 --- a/src/core/arm/skyeye_common/armdefs.h +++ b/src/core/arm/skyeye_common/armdefs.h @@ -794,6 +794,7 @@ extern u8 ARMul_UnsignedSaturatedAdd8(u8, u8); extern u16 ARMul_UnsignedSaturatedAdd16(u16, u16); extern u8 ARMul_UnsignedSaturatedSub8(u8, u8); extern u16 ARMul_UnsignedSaturatedSub16(u16, u16); +extern u8 ARMul_UnsignedAbsoluteDifference(u8, u8); #define DIFF_LOG 0 #define SAVE_LOG 0 diff --git a/src/core/arm/skyeye_common/armemu.h b/src/core/arm/skyeye_common/armemu.h index 04c5d2e1a..3ea14b5a3 100644 --- a/src/core/arm/skyeye_common/armemu.h +++ b/src/core/arm/skyeye_common/armemu.h @@ -600,7 +600,6 @@ extern ARMword ARMul_SwitchMode (ARMul_State *, ARMword, ARMword); extern ARMword ARMul_Align (ARMul_State *, ARMword, ARMword); extern ARMword ARMul_SwitchMode (ARMul_State *, ARMword, ARMword); extern void ARMul_MSRCpsr (ARMul_State *, ARMword, ARMword); -extern u8 ARMul_UnsignedAbsoluteDifference(u8, u8); 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); |