[ARM] Optimization to psq_l, no need to push/pop regs anymore. Implem…

…ent support for single float loading, gives a decent speedup to Ikaruga in menus and game.

Source/Core/Core/Src/PowerPC/JitArm32/JitArm_LoadStorePaired.cpp

@@ -28,26 +28,18 @@ void JitArm::psq_l(UGeckoInstruction inst)
 
 	if (js.memcheck) { Default(inst); return; }
 
-	if (inst.W) {
-		// Enable when supporting single loads
-		Default(inst);
-		return;
-	}
-
 	LDR(R11, R9, PPCSTATE_OFF(spr[SPR_GQR0 + inst.I]));
-	//UBFX(R12, R11, 2, 6); // Scale
-	UBFX(R11, R11, 13, 3); // Type
+	UBFX(R12, R11, 13, 3); // Type
+	UBFX(R11, R11, 2, 6); // Scale
 
 	MOVI2R(R10, (u32)offset);
 	if (inst.RA)
 		ADD(R10, R10, gpr.R(inst.RA));
 	if (update)
 		MOV(gpr.R(inst.RA), R10);
-	if (inst.W)
-		ADD(R11, R11, 8);
 	MOVI2R(R14, (u32)asm_routines.pairedLoadQuantized);
-	ADD(R14, R14, R11);
-	LDR(R14, R14);
+	ADD(R14, R14, R12);
+	LDR(R14, R14, inst.W ? 8 * 4 : 0);
 
 	// Values returned in S0, S1
 	BL(R14); // Jump to the quantizer Load

Source/Core/Core/Src/PowerPC/JitArm32/JitAsm.cpp

@@ -145,25 +145,37 @@ void JitArmAsmRoutineManager::Generate()
 
 void JitArmAsmRoutineManager::GenerateCommon()
 {
+	// R14 is LR
+	// R12 is scratch
+	// R11 is scale
+	// R10 is the address
+	Operand2 mask(3, 1); // ~(Memory::MEMVIEW32_MASK)
+	NEONXEmitter nemit(this);
+
 	const u8* loadPairedIllegal = GetCodePtr();
 	BKPT(0x10);
 
 	const u8* loadPairedFloatTwo = GetCodePtr();
-	PUSH(2, R12, _LR);
-	// R12, R14 is scratch
-	// R10 is the address
-	Operand2 mask(3, 1); // ~(Memory::MEMVIEW32_MASK)
 	BIC(R10, R10, mask);
-	MOVI2R(R14, (u32)Memory::base);
-	ADD(R10, R10, R14);
+	MOVI2R(R12, (u32)Memory::base);
+	ADD(R10, R10, R12);
 
-	NEONXEmitter nemit(this);
 	nemit.VLD1(I_32, D0, R10);
 	nemit.VREV32(I_8, D0, D0);
+
+	MOV(_PC, _LR);
 
-	POP(2, R12, _PC);
 	const u8* loadPairedFloatOne = GetCodePtr();
-	BKPT(0x12);
+	BIC(R10, R10, mask);
+	MOVI2R(R12, (u32)Memory::base);
+	ADD(R10, R10, R12);
+
+	nemit.VLD1(I_32, D0, R10);
+	nemit.VREV32(I_8, D0, D0);
+
+	MOVI2F(S1, 1.0f, INVALID_REG); // Temp reg isn't used for 1.0f
+	MOV(_PC, _LR);
+
 	const u8* loadPairedU8Two = GetCodePtr();
 	BKPT(0x13);
 	const u8* loadPairedU8One = GetCodePtr();