Initial commit.

tests/double.ispc

@@ -0,0 +1,10 @@
+
+export uniform int width() { return programCount; }
+
+
+export void f_du(uniform float RET[], uniform double aFOO[], uniform double b) {
+    double a = aFOO[programIndex];
+    RET[programIndex] = a + b;
+}
+
+export void result(uniform float RET[]) { RET[programIndex] = 6 + programIndex; }