Merge pull request #22571 from hrydgard/vrnds-seed-from-vs

VFPU: vrnds takes its seed from the vs field

Core/MIPS/InterpreterVFPU.cpp

@@ -1587,8 +1587,9 @@ namespace MIPSInt
 	}
 
 	void Int_Vrnds(MIPSState *mips, MIPSOpcode op) {
-		int vd = _VD;
-		int seed = VI(vd);
+		// The seed is in the vs field. The toolchain leaves vd zero, so reading vd gets S000.
+		int vs = _VS;
+		int seed = VI(vs);
 		// Swizzles apply a constant value, constants/abs/neg work to vary the seed.
 		ApplySwizzleS(mips, reinterpret_cast<float *>(&seed), V_Single);
                 vrnd_init(uint32_t(seed), mips->vfpuCtrl + VFPU_CTRL_RCX0);

Core/MIPS/MIPSDisVFPU.cpp

@@ -567,9 +567,9 @@ namespace MIPSDis
 	}
 
 	void Dis_Vrnds(MIPSOpcode op, uint32_t pc, char *out, size_t outSize) {
-		int vd = _VD;
+		int vs = _VS;
 		const char *name = MIPSGetName(op);
-		snprintf(out, outSize, "%s%s\t%s", name, VSuff(op), VN(vd, V_Single));
+		snprintf(out, outSize, "%s%s\t%s", name, VSuff(op), VN(vs, V_Single));
 	}
 
 	void Dis_VrndX(MIPSOpcode op, uint32_t pc, char *out, size_t outSize) {