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dyncom: Implement UXTB16/UXTAB16

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This commit is contained in:
Lioncash 2014-12-28 22:43:27 -05:00
parent df728cb4c2
commit 5c198686ce
1 changed files with 55 additions and 2 deletions
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57
src/core/arm/dyncom/arm_dyncom_interpreter.cpp
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@ -3343,10 +3343,28 @@ ARM_INST_PTR INTERPRETER_TRANSLATE(usat16)(unsigned int inst, int index) { UN
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"); }
ARM_INST_PTR INTERPRETER_TRANSLATE(uxtab16)(unsigned int inst, int index) { UNIMPLEMENTED_INSTRUCTION("UXTAB16"); }
ARM_INST_PTR INTERPRETER_TRANSLATE(uxtb16)(unsigned int inst, int index) { UNIMPLEMENTED_INSTRUCTION("UXTB16"); }
ARM_INST_PTR INTERPRETER_TRANSLATE(uxtab16)(unsigned int inst, int index)
{
arm_inst* const inst_base = (arm_inst*)AllocBuffer(sizeof(arm_inst) + sizeof(uxtab_inst));
uxtab_inst* const inst_cream = (uxtab_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->Rm = BITS(inst, 0, 3);
inst_cream->Rn = BITS(inst, 16, 19);
inst_cream->Rd = BITS(inst, 12, 15);
inst_cream->rotate = BITS(inst, 10, 11);
return inst_base;
}
ARM_INST_PTR INTERPRETER_TRANSLATE(uxtb16)(unsigned int inst, int index)
{
return INTERPRETER_TRANSLATE(uxtab16)(inst, index);
}
/* Floating point VFPv3 structures and instructions */
@ -7116,8 +7134,43 @@ unsigned InterpreterMainLoop(ARMul_State* state)
USUB16_INST:
USUB8_INST:
USUBADDX_INST:
UXTAB16_INST:
UXTB16_INST:
{
INC_ICOUNTER;
if (inst_base->cond == 0xE || CondPassed(cpu, inst_base->cond)) {
uxtab_inst* const inst_cream = (uxtab_inst*)inst_base->component;
const u8 rn_idx = inst_cream->Rn;
const u32 rm_val = RM;
const u32 rotation = inst_cream->rotate * 8;
const u32 rotated_rm = ((rm_val << (32 - rotation)) | (rm_val >> rotation));
// UXTB16, otherwise UXTAB16
if (rn_idx == 15) {
RD = rotated_rm & 0x00FF00FF;
}
else {
const u32 rn_val = RN;
const u8 lo_rotated = (rotated_rm & 0xFF);
const u16 lo_result = (rn_val & 0xFFFF) + (u16)lo_rotated;
const u8 hi_rotated = (rotated_rm >> 16) & 0xFF;
const u16 hi_result = (rn_val >> 16) + (u16)hi_rotated;
RD = ((hi_result << 16) | (lo_result & 0xFFFF));
}
}
cpu->Reg[15] += GET_INST_SIZE(cpu);
INC_PC(sizeof(uxtab_inst));
FETCH_INST;
GOTO_NEXT_INST;
}
#define VFP_INTERPRETER_IMPL
#include "core/arm/skyeye_common/vfp/vfpinstr.cpp"
#undef VFP_INTERPRETER_IMPL