Get rid of redundant multiplications in bn_div_words.
authorAndy Polyakov <appro@openssl.org>
Wed, 21 Jul 1999 13:53:01 +0000 (13:53 +0000)
committerAndy Polyakov <appro@openssl.org>
Wed, 21 Jul 1999 13:53:01 +0000 (13:53 +0000)
crypto/bn/bn_asm.c

index 7f4c3ff..286a0f1 100644 (file)
@@ -266,16 +266,16 @@ BN_ULONG bn_div_words(BN_ULONG h, BN_ULONG l, BN_ULONG d)
 
                for (;;)
                        {
-                       t=(h-q*dh);
+                       t=(h-(th=q*dh));
+                       tl=BN_MASK2;
                        if ((t&BN_MASK2h) ||
-                               ((dl*q) <= (
-                                       (t<<BN_BITS4)+
+                               ((tl=dl*q) <= (
+                                       (t<<BN_BITS4)|
                                        ((l&BN_MASK2h)>>BN_BITS4))))
                                break;
                        q--;
                        }
-               th=q*dh;
-               tl=q*dl;
+               if (tl==BN_MASK2) tl=q*dl;
                t=(tl>>BN_BITS4);
                tl=(tl<<BN_BITS4)&BN_MASK2h;
                th+=t;