JitIL: a couple small optimizations.

git-svn-id: https://dolphin-emu.googlecode.com/svn/trunk@2286 8ced0084-cf51-0410-be5f-012b33b47a6e

Source/Core/Core/Src/PowerPC/Jit64IL/IR.cpp

@@ -326,6 +326,19 @@ InstLoc IRBuilder::FoldUOp(unsigned Opcode, InstLoc Op1, unsigned extra) {
 	if (Opcode == DoubleToSingle) {
 		if (getOpcode(*Op1) == DupSingleToMReg)
 			return getOp1(Op1);
+		if (getOpcode(*Op1) >= FDMul || getOpcode(*Op1) <= FDSub) {
+			InstLoc OOp1 = getOp1(Op1), OOp2 = getOp2(Op1);
+			if (getOpcode(*OOp1) == DupSingleToMReg &&
+			    getOpcode(*OOp2) == DupSingleToMReg) {
+				if (getOpcode(*Op1) == FDMul) {
+					return FoldBiOp(FSMul, getOp1(OOp1), getOp2(OOp2));
+				} else if (getOpcode(*Op1) == FDAdd) {
+					return FoldBiOp(FSAdd, getOp1(OOp1), getOp2(OOp2));
+				} else if (getOpcode(*Op1) == FDSub) {
+					return FoldBiOp(FSSub, getOp1(OOp1), getOp2(OOp2));
+				}
+			}
+		}
 	}
 
 	return EmitUOp(Opcode, Op1, extra);
@@ -1341,6 +1354,7 @@ static void DoWriteCode(IRBuilder* ibuild, Jit64* Jit, bool UseProfile) {
 		case StoreCTR:
 		case StoreMSR:
 		case StoreGQR:
+		case StoreSRR:
 		case StoreFReg:
 			if (!isImm(*getOp1(I)))
 				regMarkUse(RI, I, getOp1(I), 1);
@@ -1527,6 +1541,13 @@ static void DoWriteCode(IRBuilder* ibuild, Jit64* Jit, bool UseProfile) {
 			regNormalRegClear(RI, I);
 			break;
 		}
+		case StoreSRR: {
+			unsigned srr = *I >> 16;
+			regStoreInstToConstLoc(RI, 32, getOp1(I),
+					&PowerPC::ppcState.spr[SPR_SRR0+srr]);
+			regNormalRegClear(RI, I);
+			break;
+		}
 		case StoreCarry: {
 			Jit->CMP(32, regLocForInst(RI, getOp1(I)), Imm8(0));
 			FixupBranch nocarry = Jit->J_CC(CC_Z);

Source/Core/Core/Src/PowerPC/Jit64IL/IR.h

@@ -56,6 +56,7 @@ namespace IREmitter {
 		StoreMSR,
 		StoreFPRF,
 		StoreGQR,
+		StoreSRR,
 		// Arbitrary interpreter instruction
 		InterpreterFallback,
 
@@ -491,6 +492,9 @@ namespace IREmitter {
 		InstLoc EmitStoreGQR(InstLoc op1, unsigned gqr) {
 			return FoldUOp(StoreGQR, op1, gqr);
 		}
+		InstLoc EmitStoreSRR(InstLoc op1, unsigned srr) {
+			return FoldUOp(StoreSRR, op1, srr);
+		}
 
 		void StartBackPass() { curReadPtr = &InstList[InstList.size()]; }
 		void StartForwardPass() { curReadPtr = &InstList[0]; }

Source/Core/Core/Src/PowerPC/Jit64IL/Jit_SystemRegisters.cpp

@@ -55,6 +55,10 @@
 		case SPR_GQR0 + 7:
 			ibuild.EmitStoreGQR(ibuild.EmitLoadGReg(inst.RD), iIndex - SPR_GQR0);
 			return;
+		case SPR_SRR0:
+		case SPR_SRR1:
+			ibuild.EmitStoreSRR(ibuild.EmitLoadGReg(inst.RD), iIndex - SPR_SRR0);
+			return;
 		default:
 			Default(inst);
 			return;