commit 1a277d9ad69eb75d8934d356838680116daf3ff6
author Werner Lewis <werner.lewis@arm.com> Tue Nov 08 15:55:17 2022 +0000
committer Tom Cosgrove <tom.cosgrove@arm.com> Thu Nov 24 16:18:06 2022 +0000
tree 11230d539eb599466f8cb8c2b9390a9fbf31c6af
parent d391b8ce612d5472e3cb7a86ff8f69e642a43ba2

Replace comparison with XOR

Signed-off-by: Werner Lewis <werner.lewis@arm.com>

library/bignum_mod_raw.c

diff --git a/library/bignum_mod_raw.c b/library/bignum_mod_raw.c
index 94dcf77..8889f55 100644
--- a/library/bignum_mod_raw.c
+++ b/library/bignum_mod_raw.c
@@ -127,7 +127,7 @@
     mbedtls_mpi_uint carry, borrow;
     carry  = mbedtls_mpi_core_add( X, A, B, N->limbs );
     borrow = mbedtls_mpi_core_sub( X, X, N->p, N->limbs );
-    (void) mbedtls_mpi_core_add_if( X, N->p, N->limbs, ( carry < borrow ) );
+    (void) mbedtls_mpi_core_add_if( X, N->p, N->limbs, (unsigned char) ( carry ^ borrow ) );
 }
 /* END MERGE SLOT 5 */