pan/bi: Measure backwards branches as well
Signed-off-by: Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/5260>
diff --git a/src/panfrost/bifrost/bi_layout.c b/src/panfrost/bifrost/bi_layout.c
index 77e97e8..c00cdc7 100644
--- a/src/panfrost/bifrost/bi_layout.c
+++ b/src/panfrost/bifrost/bi_layout.c
@@ -130,7 +130,32 @@
}
}
} else {
- unreachable("Backwards branching is to-do");
+ /* We start at the beginning of the clause but have to jump
+ * through the clauses before us in the block */
+ bi_foreach_clause_in_block_from_rev(start->block, clause, start) {
+ if (clause == start)
+ continue;
+
+ ret -= bi_clause_quadwords(clause);
+ }
+
+ /* And jump back every clause of preceding blocks up through
+ * and including the target to get to the beginning of the
+ * target */
+ bi_foreach_block_from_rev(ctx, start->block, _blk) {
+ bi_block *blk = (bi_block *) _blk;
+
+ if (blk == start->block)
+ continue;
+
+ bi_foreach_clause_in_block(blk, clause) {
+ ret -= bi_clause_quadwords(clause);
+ }
+
+ /* End just after the target */
+ if (blk == target)
+ break;
+ }
}
return ret;
