From be02c0868c763a6ed5384d689ee52d7ffb79c332 Mon Sep 17 00:00:00 2001
From: Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com>
Date: Wed, 10 Feb 2021 11:46:01 -0500
Subject: [PATCH] pan/bi: Add bi_replace_index helper

I keep open-coding this, incorrectly... Since bi_index contains both
"position" and "modifier" data, it's common to want to swap the position
while preserving modifiers.

Signed-off-by: Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com>
Reviewed-by: Boris Brezillon <boris.brezillon@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/8973>
---
 src/panfrost/bifrost/compiler.h | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/src/panfrost/bifrost/compiler.h b/src/panfrost/bifrost/compiler.h
index 049b0740bc4..35203838298 100644
--- a/src/panfrost/bifrost/compiler.h
+++ b/src/panfrost/bifrost/compiler.h
@@ -199,6 +199,17 @@ bi_neg(bi_index idx)
         return idx;
 }
 
+/* Replaces an index, preserving any modifiers */
+
+static inline bi_index
+bi_replace_index(bi_index old, bi_index replacement)
+{
+        replacement.abs = old.abs;
+        replacement.neg = old.neg;
+        replacement.swizzle = old.swizzle;
+        return replacement;
+}
+
 /* For bitwise instructions */
 #define bi_not(x) bi_neg(x)