vertexjit: Fix some stupid mistakes in x86 morph.

Good to have somewhere to test it properly.

GPU/GLES/VertexDecoderX86.cpp

@@ -790,9 +790,9 @@ void VertexDecoderJitCache::Jit_Color4444Morph() {
 	Jit_WriteMorphColor(dec_->decFmt.c0off);
 }
 
-// Intentionally in reverse order.
+// The mask is intentionally in reverse order (but skips A.)
 static const u32 MEMORY_ALIGNED16(color565Mask[4]) = { 0x0000f800, 0x000007e0, 0x0000001f, 0x00000000, };
-static const float MEMORY_ALIGNED16(byColor565[4]) = { 255.0f / 1.0f, 255.0f / 31.0f, 255.0f / 63.0f, 255.0f / 31.0f, };
+static const float MEMORY_ALIGNED16(byColor565[4]) = { 255.0f / 31.0f, 255.0f / 63.0f, 255.0f / 31.0f, 255.0f / 1.0f, };
 
 void VertexDecoderJitCache::Jit_Color565Morph() {
 	MOV(PTRBITS, R(tempReg1), ImmPtr(&gstate_c.morphWeights[0]));
@@ -804,9 +804,10 @@ void VertexDecoderJitCache::Jit_Color565Morph() {
 	for (int n = 0; n < dec_->morphcount; ++n) {
 		const X64Reg reg = first ? fpScratchReg : fpScratchReg3;
 		MOVD_xmm(fpScratchReg2, MDisp(srcReg, dec_->onesize_ * n + dec_->coloff));
-		// Spread it out into each lane.
+		// Spread it out into each lane.  We end up with it reversed (R high, A low.)
+		// Below, we shift out each lane from low to high and reverse them.
 		PSHUFD(fpScratchReg2, R(fpScratchReg2), _MM_SHUFFLE(0, 0, 0, 0));
-		PAND(fpScratchReg, R(XMM5));
+		PAND(fpScratchReg2, R(XMM5));
 
 		// Alpha - start with 1.
 		MOVD_xmm(reg, R(tempReg2));
@@ -844,9 +845,9 @@ void VertexDecoderJitCache::Jit_Color565Morph() {
 	Jit_WriteMorphColor(dec_->decFmt.c0off, false);
 }
 
-// Intentionally in reverse order.
+// The mask is intentionally in reverse order.
 static const u32 MEMORY_ALIGNED16(color5551Mask[4]) = { 0x00008000, 0x00007c00, 0x000003e0, 0x0000001f, };
-static const float MEMORY_ALIGNED16(byColor5551[4]) = { 255.0f / 1.0f, 255.0f / 31.0f, 255.0f / 31.0f, 255.0f / 31.0f, };
+static const float MEMORY_ALIGNED16(byColor5551[4]) = { 255.0f / 31.0f, 255.0f / 31.0f, 255.0f / 31.0f, 255.0f / 1.0f, };
 
 void VertexDecoderJitCache::Jit_Color5551Morph() {
 	MOV(PTRBITS, R(tempReg1), ImmPtr(&gstate_c.morphWeights[0]));
@@ -859,7 +860,7 @@ void VertexDecoderJitCache::Jit_Color5551Morph() {
 		MOVD_xmm(fpScratchReg2, MDisp(srcReg, dec_->onesize_ * n + dec_->coloff));
 		// Spread it out into each lane.
 		PSHUFD(fpScratchReg2, R(fpScratchReg2), _MM_SHUFFLE(0, 0, 0, 0));
-		PAND(fpScratchReg, R(XMM5));
+		PAND(fpScratchReg2, R(XMM5));
 
 		// Alpha first.
 		MOVSS(reg, R(fpScratchReg2));