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An attempt to combine FPU regcache writebacks with VSTMIA. Disabled due to bugs.

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This commit is contained in:
Henrik Rydgard 2014-03-11 11:02:22 +01:00
parent 6b709a601d
commit adadf11890
3 changed files with 94 additions and 21 deletions
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2
Common/ArmEmitter.cpp
View File

@ -2577,8 +2577,6 @@ void ARMXEmitter::VREV16(u32 Size, ARMReg Vd, ARMReg Vm)
VREVX(2, Size, Vd, Vm);
}
// UNTESTED
// See page A8-878 in ARMv7-A Architecture Reference Manual
// Dest is a Q register, Src is a D register.

4
Core/MIPS/ARM/ArmCompVFPU.cpp
View File

@ -1046,8 +1046,8 @@ namespace MIPSComp
VMOV(tmp[i], fpr.V(sregs[i]));
}
// This always converts four 32-bit floats in Q0 to four 16-bit floats
// in D0. If we are dealing with a pair here, we just ignore the upper two outputs.
// This always converts four 16-bit floats in D0 to four 32-bit floats
// in Q0. If we are dealing with a pair here, we just ignore the upper two outputs.
// There are also a couple of other instructions that do it one at a time but doesn't
// seem worth the trouble.
VCVTF32F16(Q0, D0);

109
Core/MIPS/ARM/ArmRegCacheFPU.cpp
View File

@ -302,6 +302,98 @@ void ArmRegCacheFPU::FlushR(MIPSReg r) {
mr[r].reg = (int)INVALID_REG;
}
void ArmRegCacheFPU::FlushAll() {
// Discard temps!
for (int i = TEMP0; i < TEMP0 + NUM_TEMPS; i++) {
DiscardR(i);
}
#if 0
// Causes crashes and weird glitches. Really not sure what's going on as the logs look ok.
// TODO: VSTMIA requires NEON so we should check for that.
int lastARMReg = INVALID_REG;
int continuityStartARMReg = INVALID_REG;
int continuityStartMIPSReg = -1;
for (int r = 0; r < NUM_MIPSFPUREG + 1; r++) {
if (r == NUM_MIPSFPUREG)
goto drop;
if (mr[r].loc == ML_ARMREG) {
if (mr[r].reg == (int)INVALID_REG) {
ERROR_LOG(JIT, "FlushAll %i: MipsReg had bad ArmReg", r);
}
if (ar[mr[r].reg].isDirty) {
ar[mr[r].reg].isDirty = false;
if (continuityStartARMReg == INVALID_REG) {
lastARMReg = mr[r].reg;
continuityStartARMReg = mr[r].reg;
continuityStartMIPSReg = r;
ILOG("Starting continuity: A%i M%i", continuityStartARMReg, continuityStartMIPSReg);
// goto drop;
} else {
if (mr[r].reg != lastARMReg + 1) {
// Continuity mismatch - drop.
ar[mr[r].reg].mipsReg = -1;
mr[r].loc = ML_MEM;
mr[r].reg = (int)INVALID_REG;
goto drop;
}
lastARMReg = mr[r].reg;
}
} else {
// Continuity dirty mismatch - drop.
ar[mr[r].reg].mipsReg = -1;
mr[r].loc = ML_MEM;
mr[r].reg = (int)INVALID_REG;
goto drop;
}
ar[mr[r].reg].mipsReg = -1;
mr[r].loc = ML_MEM;
mr[r].reg = (int)INVALID_REG;
continue;
} else {
mr[r].loc = ML_MEM;
mr[r].reg = (int)INVALID_REG;
goto drop;
}
continue;
drop:
// Continuity ended. See if we have anything to flush.
if (lastARMReg != INVALID_REG) {
ILOG("Ending continuity at A%i (start: A%i)", lastARMReg, continuityStartARMReg);
if (lastARMReg == continuityStartARMReg) {
// Single one. Just do a VSTR.
ILOG("Writing single ARM reg: A%i (M%i)", continuityStartARMReg, continuityStartMIPSReg);
emit_->VSTR((ARMReg)(continuityStartARMReg + S0), CTXREG, GetMipsRegOffset(continuityStartMIPSReg));
} else {
ILOG("Writing multiple ARM regs : A%i - A%i M%i", continuityStartARMReg, lastARMReg, continuityStartMIPSReg);
// VSTMIA!
emit_->ADDI2R(R0, CTXREG, GetMipsRegOffset(continuityStartMIPSReg), R1);
int count = lastARMReg - continuityStartARMReg + 1;
ILOG("VSTMIA R0, %i, %i", continuityStartARMReg, count);
emit_->VSTMIA(R0, false, (ARMReg)(S0 + continuityStartARMReg), count);
}
}
lastARMReg = INVALID_REG;
continuityStartARMReg = INVALID_REG;
}
#else
for (int i = 0; i < NUM_MIPSFPUREG; i++) {
FlushR(i);
}
#endif
// Sanity check
for (int i = 0; i < numARMFpuReg_; i++) {
if (ar[i].mipsReg != -1) {
ERROR_LOG(JIT, "Flush fail: ar[%i].mipsReg=%i", i, ar[i].mipsReg);
}
}
}
void ArmRegCacheFPU::DiscardR(MIPSReg r) {
switch (mr[r].loc) {
case ML_IMM:
@ -351,23 +443,6 @@ int ArmRegCacheFPU::GetTempR() {
return -1;
}
void ArmRegCacheFPU::FlushAll() {
// Discard temps!
for (int i = TEMP0; i < TEMP0 + NUM_TEMPS; i++) {
DiscardR(i);
}
for (int i = 0; i < NUM_MIPSFPUREG; i++) {
FlushR(i);
}
// Sanity check
for (int i = 0; i < numARMFpuReg_; i++) {
if (ar[i].mipsReg != -1) {
ERROR_LOG(JIT, "Flush fail: ar[%i].mipsReg=%i", i, ar[i].mipsReg);
}
}
}
int ArmRegCacheFPU::GetMipsRegOffset(MIPSReg r) {
// These are offsets within the MIPSState structure. First there are the GPRS, then FPRS, then the "VFPURs", then the VFPU ctrls.
if (r < 0 || r > 32 + 128 + NUM_TEMPS) {