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dyncom: Implement SMLAD/SMUAD/SMLSD/SMUSD

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This commit is contained in:
Lioncash 2015-01-02 18:21:45 -05:00
parent 092a67cefb
commit 3337b84620
5 changed files with 84 additions and 50 deletions
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117
src/core/arm/dyncom/arm_dyncom_interpreter.cpp
View file

@ -930,6 +930,8 @@ typedef struct _smlad_inst {
unsigned int Rd;
unsigned int Ra;
unsigned int Rn;
unsigned int op1;
unsigned int op2;
} smlad_inst;
typedef struct _smla_inst {
@ -2313,25 +2315,40 @@ ARM_INST_PTR INTERPRETER_TRANSLATE(smla)(unsigned int inst, int index)
return inst_base;
}
ARM_INST_PTR INTERPRETER_TRANSLATE(smlad)(unsigned int inst, int index){
arm_inst *inst_base = (arm_inst *)AllocBuffer(sizeof(arm_inst) + sizeof(smlad_inst));
smlad_inst *inst_cream = (smlad_inst *)inst_base->component;
inst_base->cond = BITS(inst, 28, 31);
inst_base->idx = index;
inst_base->br = NON_BRANCH;
ARM_INST_PTR INTERPRETER_TRANSLATE(smlad)(unsigned int inst, int index)
{
arm_inst* const inst_base = (arm_inst*)AllocBuffer(sizeof(arm_inst) + sizeof(smlad_inst));
smlad_inst* const inst_cream = (smlad_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->m = BIT(inst, 4);
inst_cream->Rn = BITS(inst, 0, 3);
inst_cream->Rm = BITS(inst, 8, 11);
inst_cream->Rd = BITS(inst, 16, 19);
inst_cream->Ra = BITS(inst, 12, 15);
inst_cream->m = BIT(inst, 5);
inst_cream->Rn = BITS(inst, 0, 3);
inst_cream->Rm = BITS(inst, 8, 11);
inst_cream->Rd = BITS(inst, 16, 19);
inst_cream->Ra = BITS(inst, 12, 15);
inst_cream->op1 = BITS(inst, 20, 22);
inst_cream->op2 = BITS(inst, 5, 7);
if (CHECK_RM )
inst_base->load_r15 = 1;
return inst_base;
}
ARM_INST_PTR INTERPRETER_TRANSLATE(smuad)(unsigned int inst, int index)
{
return INTERPRETER_TRANSLATE(smlad)(inst, index);
}
ARM_INST_PTR INTERPRETER_TRANSLATE(smusd)(unsigned int inst, int index)
{
return INTERPRETER_TRANSLATE(smlad)(inst, index);
}
ARM_INST_PTR INTERPRETER_TRANSLATE(smlsd)(unsigned int inst, int index)
{
return INTERPRETER_TRANSLATE(smlad)(inst, index);
}
ARM_INST_PTR INTERPRETER_TRANSLATE(smlal)(unsigned int inst, int index)
{
arm_inst *inst_base = (arm_inst *)AllocBuffer(sizeof(arm_inst) + sizeof(umlal_inst));
@ -2355,12 +2372,10 @@ ARM_INST_PTR INTERPRETER_TRANSLATE(smlal)(unsigned int inst, int index)
ARM_INST_PTR INTERPRETER_TRANSLATE(smlalxy)(unsigned int inst, int index) { UNIMPLEMENTED_INSTRUCTION("SMLALXY"); }
ARM_INST_PTR INTERPRETER_TRANSLATE(smlald)(unsigned int inst, int index) { UNIMPLEMENTED_INSTRUCTION("SMLALD"); }
ARM_INST_PTR INTERPRETER_TRANSLATE(smlaw)(unsigned int inst, int index) { UNIMPLEMENTED_INSTRUCTION("SMLAW"); }
ARM_INST_PTR INTERPRETER_TRANSLATE(smlsd)(unsigned int inst, int index) { UNIMPLEMENTED_INSTRUCTION("SMLSD"); }
ARM_INST_PTR INTERPRETER_TRANSLATE(smlsld)(unsigned int inst, int index) { UNIMPLEMENTED_INSTRUCTION("SMLSLD"); }
ARM_INST_PTR INTERPRETER_TRANSLATE(smmla)(unsigned int inst, int index) { UNIMPLEMENTED_INSTRUCTION("SMMLA"); }
ARM_INST_PTR INTERPRETER_TRANSLATE(smmls)(unsigned int inst, int index) { UNIMPLEMENTED_INSTRUCTION("SMMLS"); }
ARM_INST_PTR INTERPRETER_TRANSLATE(smmul)(unsigned int inst, int index) { UNIMPLEMENTED_INSTRUCTION("SMMUL"); }
ARM_INST_PTR INTERPRETER_TRANSLATE(smuad)(unsigned int inst, int index) { UNIMPLEMENTED_INSTRUCTION("SMUAD"); }
ARM_INST_PTR INTERPRETER_TRANSLATE(smul)(unsigned int inst, int index)
{
arm_inst *inst_base = (arm_inst *)AllocBuffer(sizeof(arm_inst) + sizeof(smul_inst));
@ -2423,7 +2438,6 @@ ARM_INST_PTR INTERPRETER_TRANSLATE(smulw)(unsigned int inst, int index)
inst_base->load_r15 = 1;
return inst_base;
}
ARM_INST_PTR INTERPRETER_TRANSLATE(smusd)(unsigned int inst, int index) { UNIMPLEMENTED_INSTRUCTION("SMUSD"); }
ARM_INST_PTR INTERPRETER_TRANSLATE(srs)(unsigned int inst, int index) { UNIMPLEMENTED_INSTRUCTION("SRS"); }
ARM_INST_PTR INTERPRETER_TRANSLATE(ssat)(unsigned int inst, int index)
{
@ -5382,44 +5396,59 @@ unsigned InterpreterMainLoop(ARMul_State* state) {
FETCH_INST;
GOTO_NEXT_INST;
}
SMLAD_INST:
SMLSD_INST:
SMUAD_INST:
SMUSD_INST:
{
if ((inst_base->cond == 0xe) || CondPassed(cpu, inst_base->cond)) {
smlad_inst *inst_cream = (smlad_inst *)inst_base->component;
long long int rm = cpu->Reg[inst_cream->Rm];
long long int rn = cpu->Reg[inst_cream->Rn];
long long int ra = cpu->Reg[inst_cream->Ra];
if (inst_base->cond == 0xE || CondPassed(cpu, inst_base->cond)) {
smlad_inst* const inst_cream = (smlad_inst*)inst_base->component;
const u8 op2 = inst_cream->op2;
// See SMUAD
if(inst_cream->Ra == 15)
CITRA_IGNORE_EXIT(-1);
int operand2 = (inst_cream->m)? ROTATE_RIGHT_32(rm, 16):rm;
int half_rn, half_operand2;
u32 rm_val = cpu->Reg[inst_cream->Rm];
const u32 rn_val = cpu->Reg[inst_cream->Rn];
half_rn = rn & 0xFFFF;
half_rn = (half_rn & 0x8000)? (0xFFFF0000|half_rn) : half_rn;
if (inst_cream->m)
rm_val = (((rm_val & 0xFFFF) << 16) | (rm_val >> 16));
half_operand2 = operand2 & 0xFFFF;
half_operand2 = (half_operand2 & 0x8000)? (0xFFFF0000|half_operand2) : half_operand2;
const s16 rm_lo = (rm_val & 0xFFFF);
const s16 rm_hi = ((rm_val >> 16) & 0xFFFF);
const s16 rn_lo = (rn_val & 0xFFFF);
const s16 rn_hi = ((rn_val >> 16) & 0xFFFF);
long long int product1 = half_rn * half_operand2;
const u32 product1 = (rn_lo * rm_lo);
const u32 product2 = (rn_hi * rm_hi);
half_rn = (rn & 0xFFFF0000) >> 16;
half_rn = (half_rn & 0x8000)? (0xFFFF0000|half_rn) : half_rn;
// SMUAD and SMLAD
if (BIT(op2, 1) == 0) {
RD = (product1 + product2);
half_operand2 = (operand2 & 0xFFFF0000) >> 16;
half_operand2 = (half_operand2 & 0x8000)? (0xFFFF0000|half_operand2) : half_operand2;
if (inst_cream->Ra != 15) {
RD += cpu->Reg[inst_cream->Ra];
long long int product2 = half_rn * half_operand2;
if (ARMul_AddOverflowQ(product1 + product2, cpu->Reg[inst_cream->Ra]))
cpu->Cpsr |= (1 << 27);
}
long long int signed_ra = (ra & 0x80000000)? (0xFFFFFFFF00000000LL) | ra : ra;
long long int result = product1 + product2 + signed_ra;
cpu->Reg[inst_cream->Rd] = result & 0xFFFFFFFF;
if (ARMul_AddOverflowQ(product1, product2))
cpu->Cpsr |= (1 << 27);
}
// SMUSD and SMLSD
else {
RD = (product1 - product2);
// TODO: FIXME should check Signed overflow
if (inst_cream->Ra != 15) {
RD += cpu->Reg[inst_cream->Ra];
if (ARMul_AddOverflowQ(product1 - product2, cpu->Reg[inst_cream->Ra]))
cpu->Cpsr |= (1 << 27);
}
}
}
cpu->Reg[15] += GET_INST_SIZE(cpu);
INC_PC(sizeof(umlal_inst));
INC_PC(sizeof(smlad_inst));
FETCH_INST;
GOTO_NEXT_INST;
}
@ -5452,15 +5481,15 @@ unsigned InterpreterMainLoop(ARMul_State* state) {
FETCH_INST;
GOTO_NEXT_INST;
}
SMLALXY_INST:
SMLALD_INST:
SMLAW_INST:
SMLSD_INST:
SMLSLD_INST:
SMMLA_INST:
SMMLS_INST:
SMMUL_INST:
SMUAD_INST:
SMUL_INST:
{
if ((inst_base->cond == 0xe) || CondPassed(cpu, inst_base->cond)) {
@ -5528,8 +5557,8 @@ unsigned InterpreterMainLoop(ARMul_State* state) {
GOTO_NEXT_INST;
}
SMUSD_INST:
SRS_INST:
SSAT_INST:
{
if (inst_base->cond == 0xE || CondPassed(cpu, inst_base->cond)) {

6
src/core/arm/interpreter/armemu.cpp
View file

@ -6470,10 +6470,12 @@ L_stm_s_takeabort:
if (BITS(12, 15) != 15) {
state->Reg[rd_idx] += state->Reg[ra_idx];
ARMul_AddOverflowQ(state, product1 + product2, state->Reg[ra_idx]);
if (ARMul_AddOverflowQ(product1 + product2, state->Reg[ra_idx]))
SETQ;
}
ARMul_AddOverflowQ(state, product1, product2);
if (ARMul_AddOverflowQ(product1, product2))
SETQ;
}
// SMUSD and SMLSD
else {

8
src/core/arm/interpreter/armsupp.cpp
View file

@ -453,12 +453,14 @@ ARMul_AddOverflow (ARMul_State * state, ARMword a, ARMword b, ARMword result)
ASSIGNV (AddOverflow (a, b, result));
}
/* Assigns the Q flag if the given result is considered an overflow from the addition of a and b */
void ARMul_AddOverflowQ(ARMul_State* state, ARMword a, ARMword b)
// Returns true if the Q flag should be set as a result of overflow.
bool ARMul_AddOverflowQ(ARMword a, ARMword b)
{
u32 result = a + b;
if (((result ^ a) & (u32)0x80000000) && ((a ^ b) & (u32)0x80000000) == 0)
SETQ;
return true;
return false;
}
/* Assigns the C flag after an subtraction of a and b to give result. */

2
src/core/arm/skyeye_common/armdefs.h
View file

@ -790,6 +790,8 @@ extern void ARMul_FixSPSR(ARMul_State*, ARMword, ARMword);
extern void ARMul_ConsolePrint(ARMul_State*, const char*, ...);
extern void ARMul_SelectProcessor(ARMul_State*, unsigned);
extern bool ARMul_AddOverflowQ(ARMword, ARMword);
extern u8 ARMul_SignedSaturatedAdd8(u8, u8);
extern u8 ARMul_SignedSaturatedSub8(u8, u8);
extern u16 ARMul_SignedSaturatedAdd16(u16, u16);

1
src/core/arm/skyeye_common/armemu.h
View file

@ -602,7 +602,6 @@ extern ARMword ARMul_SwitchMode (ARMul_State *, ARMword, ARMword);
extern void ARMul_MSRCpsr (ARMul_State *, ARMword, ARMword);
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);
extern void ARMul_SubCarry (ARMul_State *, ARMword, ARMword, ARMword);
extern void ARMul_AddCarry (ARMul_State *, ARMword, ARMword, ARMword);
extern tdstate ARMul_ThumbDecode (ARMul_State *, ARMword, ARMword, ARMword *);