Implement missing state and queries.

Change-Id: I4858980fc32df435ffc0fc0917905116bea54aa8
Reviewed-on: https://swiftshader-review.googlesource.com/3790
Reviewed-by: Nicolas Capens <capn@google.com>
Tested-by: Nicolas Capens <capn@google.com>

src/Shader/PixelRoutine.cpp

diff --git a/src/Shader/PixelRoutine.cpp b/src/Shader/PixelRoutine.cpp
index b53c031..442c512 100644
--- a/src/Shader/PixelRoutine.cpp
+++ b/src/Shader/PixelRoutine.cpp
@@ -1285,7 +1285,7 @@
 
 	void PixelRoutine::logicOperation(Registers &r, int index, Pointer<Byte> &cBuffer, Vector4s &current, Int &x)
 	{
-		if(state.logicalOperation == LogicalOperation::LOGICALOP_COPY)
+		if(state.logicalOperation == LOGICALOP_COPY)
 		{
 			return;
 		}
@@ -1303,9 +1303,9 @@
 			current.z = 0;
 			break;
 		case LOGICALOP_SET:
-			current.x = 0xFFFF;
-			current.y = 0xFFFF;
-			current.z = 0xFFFF;
+			current.x = 0xFFFFu;
+			current.y = 0xFFFFu;
+			current.z = 0xFFFFu;
 			break;
 		case LOGICALOP_COPY:
 			ASSERT(false);   // Optimized out