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dyncom: Implement USAD8/USADA8

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This commit is contained in:
Lioncash 2014-12-28 12:40:51 -05:00
parent 762f16c4ad
commit 7d322b5c6f
3 changed files with 53 additions and 3 deletions
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54
src/core/arm/dyncom/arm_dyncom_interpreter.cpp
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@ -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:

1
src/core/arm/skyeye_common/armdefs.h
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@ -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

1
src/core/arm/skyeye_common/armemu.h
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@ -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);