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dyncom: Implement USAT16/SSAT16

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This commit is contained in:
Lioncash 2014-12-30 09:19:33 -05:00
parent b3240f6455
commit cc9f458ad3
1 changed files with 61 additions and 2 deletions
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63
src/core/arm/dyncom/arm_dyncom_interpreter.cpp
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@ -2551,7 +2551,22 @@ ARM_INST_PTR INTERPRETER_TRANSLATE(ssat)(unsigned int inst, int index)
return inst_base;
}
ARM_INST_PTR INTERPRETER_TRANSLATE(ssat16)(unsigned int inst, int index) { UNIMPLEMENTED_INSTRUCTION("SSAT16"); }
ARM_INST_PTR INTERPRETER_TRANSLATE(ssat16)(unsigned int inst, int index)
{
arm_inst* const inst_base = (arm_inst*)AllocBuffer(sizeof(arm_inst) + sizeof(ssat_inst));
ssat_inst* const inst_cream = (ssat_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->Rn = BITS(inst, 0, 3);
inst_cream->Rd = BITS(inst, 12, 15);
inst_cream->sat_imm = BITS(inst, 16, 19);
return inst_base;
}
ARM_INST_PTR INTERPRETER_TRANSLATE(ssub8)(unsigned int inst, int index) { UNIMPLEMENTED_INSTRUCTION("SSUB8"); }
ARM_INST_PTR INTERPRETER_TRANSLATE(ssub16)(unsigned int inst, int index)
{
@ -3157,7 +3172,10 @@ ARM_INST_PTR INTERPRETER_TRANSLATE(usat)(unsigned int inst, int index)
{
return INTERPRETER_TRANSLATE(ssat)(inst, index);
}
ARM_INST_PTR INTERPRETER_TRANSLATE(usat16)(unsigned int inst, int index) { UNIMPLEMENTED_INSTRUCTION("USAT16"); }
ARM_INST_PTR INTERPRETER_TRANSLATE(usat16)(unsigned int inst, int index)
{
return INTERPRETER_TRANSLATE(ssat16)(inst, index);
}
ARM_INST_PTR INTERPRETER_TRANSLATE(usub16)(unsigned int inst, int index) { UNIMPLEMENTED_INSTRUCTION("USUB16"); }
ARM_INST_PTR INTERPRETER_TRANSLATE(usub8)(unsigned int inst, int index) { UNIMPLEMENTED_INSTRUCTION("USUB8"); }
ARM_INST_PTR INTERPRETER_TRANSLATE(usubaddx)(unsigned int inst, int index) { UNIMPLEMENTED_INSTRUCTION("USUBADDX"); }
@ -5575,6 +5593,26 @@ unsigned InterpreterMainLoop(ARMul_State* state) {
}
SSAT16_INST:
{
if (inst_base->cond == 0xE || CondPassed(cpu, inst_base->cond)) {
ssat_inst* const inst_cream = (ssat_inst*)inst_base->component;
const u8 saturate_to = inst_cream->sat_imm;
bool sat1 = false;
bool sat2 = false;
RD = (ARMul_SignedSatQ((s16)RN, saturate_to, &sat1) & 0xFFFF) |
ARMul_SignedSatQ((s32)RN >> 16, saturate_to, &sat2) << 16;
if (sat1 || sat2)
cpu->Cpsr |= (1 << 27);
}
cpu->Reg[15] += GET_INST_SIZE(cpu);
INC_PC(sizeof(ssat_inst));
FETCH_INST;
GOTO_NEXT_INST;
}
SSUB8_INST:
STC_INST:
{
@ -6355,6 +6393,27 @@ unsigned InterpreterMainLoop(ARMul_State* state) {
}
USAT16_INST:
{
if (inst_base->cond == 0xE || CondPassed(cpu, inst_base->cond)) {
ssat_inst* const inst_cream = (ssat_inst*)inst_base->component;
const u8 saturate_to = inst_cream->sat_imm;
bool sat1 = false;
bool sat2 = false;
RD = (ARMul_UnsignedSatQ((s16)RN, saturate_to, &sat1) & 0xFFFF) |
ARMul_UnsignedSatQ((s32)RN >> 16, saturate_to, &sat2) << 16;
if (sat1 || sat2)
cpu->Cpsr |= (1 << 27);
}
cpu->Reg[15] += GET_INST_SIZE(cpu);
INC_PC(sizeof(ssat_inst));
FETCH_INST;
GOTO_NEXT_INST;
}
USUB16_INST:
USUB8_INST:
USUBADDX_INST: