From 06f52fe0b1a219682317035c831d60824fecce55 Mon Sep 17 00:00:00 2001
From: Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com>
Date: Wed, 16 Dec 2020 12:56:45 -0500
Subject: [PATCH] pan/bi: Add node_to_index helper

To invert index_to_node for RA.

Signed-off-by: Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/8215>
---
 src/panfrost/bifrost/compiler.h | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/src/panfrost/bifrost/compiler.h b/src/panfrost/bifrost/compiler.h
index 4f1408e73e9..aa980c49707 100644
--- a/src/panfrost/bifrost/compiler.h
+++ b/src/panfrost/bifrost/compiler.h
@@ -778,6 +778,15 @@ bi_get_node(bi_index index)
                 return (index.value << 1) | index.reg;
 }
 
+static inline bi_index
+bi_node_to_index(unsigned node, unsigned node_count)
+{
+        assert(node < node_count);
+        assert(node_count < ~0);
+
+        return bi_get_index(node >> 1, node & PAN_IS_REG, 0);
+}
+
 /* Iterators for Bifrost IR */
 
 #define bi_foreach_block(ctx, v) \