PACK/UNPACK.

src/alloy/hir/opcodes.h

@@ -66,6 +66,12 @@ enum Swizzles {
   SWIZZLE_XYZW_TO_ZWXY = SWIZZLE_MASK(2, 3, 0, 1),
   SWIZZLE_XYZW_TO_WXYZ = SWIZZLE_MASK(3, 0, 1, 2),
 };
+enum PackType {
+  PACK_TYPE_D3DCOLOR = 0,
+  PACK_TYPE_FLOAT16_2 = 1,
+  PACK_TYPE_FLOAT16_4 = 2,
+  PACK_TYPE_SHORT_2 = 3,
+};
 
 
 enum Opcode {
@@ -173,6 +179,8 @@ enum Opcode {
   OPCODE_SPLAT,
   OPCODE_PERMUTE,
   OPCODE_SWIZZLE,
+  OPCODE_PACK,
+  OPCODE_UNPACK,
 
   OPCODE_COMPARE_EXCHANGE,
   OPCODE_ATOMIC_EXCHANGE,