From 14386eb7e5757b317a478f7c12301d0ff47f760f Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Jos=C3=A9=20Roberto=20de=20Souza?= <jose.souza@intel.com>
Date: Mon, 21 Jul 2025 10:37:24 -0700
Subject: [PATCH] intel/brw: Add comment to reg_unit()
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Reviewed-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
Signed-off-by: José Roberto de Souza <jose.souza@intel.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/36448>
---
 src/intel/compiler/brw_eu.h | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/intel/compiler/brw_eu.h b/src/intel/compiler/brw_eu.h
index df21a66157e..bf5ff3b0021 100644
--- a/src/intel/compiler/brw_eu.h
+++ b/src/intel/compiler/brw_eu.h
@@ -247,13 +247,15 @@ ALU2(SUBB)
 #undef ALU2
 #undef ALU3
 
+/* In Xe2+ each register is 64bytes/512bits long while older platforms it is
+ * 32bytes/256bits long.
+ */
 static inline unsigned
 reg_unit(const struct intel_device_info *devinfo)
 {
    return devinfo->ver >= 20 ? 2 : 1;
 }
 
-
 /* Helpers for SEND instruction:
  */