pan/bi: Clarify special op scheduling
They're encoded on ADD but eat the full cycle.
Signed-off-by: Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/4061>
diff --git a/src/panfrost/bifrost/compiler.h b/src/panfrost/bifrost/compiler.h
index ed9dd75..6eddf44 100644
--- a/src/panfrost/bifrost/compiler.h
+++ b/src/panfrost/bifrost/compiler.h
@@ -95,6 +95,10 @@
/* Most ALU ops can do either, actually */
#define BI_SCHED_ALL (BI_SCHED_FMA | BI_SCHED_ADD)
+/* Along with setting BI_SCHED_ADD, eats up the entire cycle, so FMA must be
+ * nopped out. Used for _FAST operations. */
+#define BI_SCHED_SLOW (1 << 5)
+
/* It can't get any worse than csel4... can it? */
#define BIR_SRC_COUNT 4