-#define NUM_CHANNELS 4 /* R,G,B,A */
-#define QUAD_SIZE 4 /* 4 pixel/quad */
+#define TGSI_NUM_CHANNELS 4 /* R,G,B,A */
+#define TGSI_QUAD_SIZE 4 /* 4 pixel/quad */
+
+#define TGSI_FOR_EACH_CHANNEL( CHAN )\
+ for (CHAN = 0; CHAN < TGSI_NUM_CHANNELS; CHAN++)
+
+#define TGSI_IS_DST0_CHANNEL_ENABLED( INST, CHAN )\
+ ((INST)->Dst[0].Register.WriteMask & (1 << (CHAN)))
+
+#define TGSI_IF_IS_DST0_CHANNEL_ENABLED( INST, CHAN )\
+ if (TGSI_IS_DST0_CHANNEL_ENABLED( INST, CHAN ))
+
+#define TGSI_FOR_EACH_DST0_ENABLED_CHANNEL( INST, CHAN )\
+ TGSI_FOR_EACH_CHANNEL( CHAN )\
+ TGSI_IF_IS_DST0_CHANNEL_ENABLED( INST, CHAN )