From 954623856c8f8aa6057770290fa329aafcd0a95f Mon Sep 17 00:00:00 2001
From: Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com>
Date: Wed, 27 Jan 2021 08:49:09 -0500
Subject: [PATCH] pan/mdg: Assert on bad 64-bit swizzle in disassembly

Signed-off-by: Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/8774>
---
 src/panfrost/midgard/disassemble.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/panfrost/midgard/disassemble.c b/src/panfrost/midgard/disassemble.c
index 84daab31a56..18570a41390 100644
--- a/src/panfrost/midgard/disassemble.c
+++ b/src/panfrost/midgard/disassemble.c
@@ -592,8 +592,10 @@ print_mask(FILE *fp, uint8_t mask, unsigned bits, midgard_dest_override override
                 if (a) {
                         char c = alphabet[i / skip];
 
-                        if (uppercase)
+                        if (uppercase) {
                                 c = toupper(c);
+                                assert(c == 'X' || c == 'Y');
+                        }
 
                         fprintf(fp, "%c", c);
                 }