crypto/bn/bn_nist.c: work around MSC ARM compiler bug.

RT: 3541
Reviewed-by: Emilia Kasper <emilia@openssl.org>
(cherry picked from commit 8b07c005fe006044d0e4a795421447deca3c9f2c)

diff --git a/crypto/bn/bn_nist.c b/crypto/bn/bn_nist.c
index e22968d4a33bd3ad5a77609a1608abc41baf7548..abb1570853ec2cfd0a06a3034f6aaa158ed7e63e 100644 (file)
--- a/crypto/bn/bn_nist.c
+++ b/crypto/bn/bn_nist.c
@@ -1088,9 +1088,9 @@ int BN_nist_mod_521(BIGNUM *r, const BIGNUM *a, const BIGNUM *field,
        /* ... and right shift */
        for (val=t_d[0],i=0; i<BN_NIST_521_TOP-1; i++)
                {
-               tmp = val>>BN_NIST_521_RSHIFT;
-               val = t_d[i+1];
-               t_d[i] = (tmp | val<<BN_NIST_521_LSHIFT) & BN_MASK2;
+               t_d[i] = ( val>>BN_NIST_521_RSHIFT |
+                         (tmp=t_d[i+1])<<BN_NIST_521_LSHIFT ) & BN_MASK2;
+               val=tmp;
                }
        t_d[i] = val>>BN_NIST_521_RSHIFT;
        /* lower 521 bits */