From 342e9ac7e8f790244b1a2bb5da63823c64d8c120 Mon Sep 17 00:00:00 2001
From: Faith Ekstrand <faith.ekstrand@collabora.com>
Date: Sat, 28 Mar 2026 22:06:33 -0400
Subject: [PATCH] pan/bi: Add a bi_swizzle_from_half() helper

Reviewed-by: Lorenzo Rossi <lorenzo.rossi@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/40720>
---
 src/panfrost/compiler/bifrost/compiler.h | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/src/panfrost/compiler/bifrost/compiler.h b/src/panfrost/compiler/bifrost/compiler.h
index 87d2d5e9fcd..d4611030c18 100644
--- a/src/panfrost/compiler/bifrost/compiler.h
+++ b/src/panfrost/compiler/bifrost/compiler.h
@@ -139,6 +139,12 @@ bi_swizzle_to_byte_channels(enum bi_swizzle swizzle, unsigned *channels)
 #undef B
 }
 
+static inline enum bi_swizzle
+bi_swizzle_from_half(bool x, bool y)
+{
+   return (enum bi_swizzle)(BI_SWIZZLE_H00 | (x << 1) | y);
+}
+
 /* Given a packed i16vec2/i8vec4 constant, apply a swizzle. Useful for constant
  * folding and Valhall constant optimization. */
 
@@ -336,7 +342,7 @@ static inline bi_index
 bi_swz_16(bi_index idx, bool x, bool y)
 {
    assert(idx.swizzle == BI_SWIZZLE_H01);
-   idx.swizzle = (enum bi_swizzle)(BI_SWIZZLE_H00 | (x << 1) | y);
+   idx.swizzle = bi_swizzle_from_half(x, y);
    return idx;
 }