commit cb5c9fb0c23a3ecf3e69a5be0e3dc11f1bed148f
author Dave Rodgman <dave.rodgman@arm.com> Tue Oct 10 10:06:02 2023 +0100
committer Dave Rodgman <dave.rodgman@arm.com> Wed Oct 25 09:06:24 2023 +0100
tree 7bcb4db8b8feb6cda17bf59767ef3573ff9d06a1
parent b34fe8b88b9f4c0bfa55c5699a635aa11b0a8ec2

Add volatile to prevent asm being optimised out

Signed-off-by: Dave Rodgman <dave.rodgman@arm.com>

library/aesce.c

diff --git a/library/aesce.c b/library/aesce.c
index 752e008..e36c6d4 100644
--- a/library/aesce.c
+++ b/library/aesce.c
@@ -568,7 +568,7 @@
     /* use 'asm' as an optimisation barrier to prevent loading MODULO from
      * memory. It is for GNUC compatible compilers.
      */
-    asm ("" : "+w" (r));
+    asm volatile ("" : "+w" (r));
 #endif
     uint8x16_t const MODULO = vreinterpretq_u8_u64(vshrq_n_u64(r, 64 - 8));
     uint8x16_t h, m, l; /* input high/middle/low 128b */