1 files changed, 27 insertions, 1 deletions

diff --git a/src/lib/libcrypto/bn/bn_div.c b/src/lib/libcrypto/bn/bn_div.c
index f9a095e3b3..580d1201bc 100644
--- a/src/lib/libcrypto/bn/bn_div.c
+++ b/src/lib/libcrypto/bn/bn_div.c
@@ -150,6 +150,20 @@ int BN_div(BIGNUM *dv, BIGNUM *rem, const BIGNUM *m, const BIGNUM *d,
             q;                                  \
         })
 #  define REMAINDER_IS_ALREADY_CALCULATED
+#  elif defined(__x86_64) && defined(SIXTY_FOUR_BIT_LONG)
+   /*
+    * Same story here, but it's 128-bit by 64-bit division. Wow!
+    *                                   <appro@fy.chalmers.se>
+    */
+#  define bn_div_words(n0,n1,d0)                \
+        ({  asm volatile (                      \
+                "divq   %4"                     \
+                : "=a"(q), "=d"(rem)            \
+                : "a"(n1), "d"(n0), "g"(d0)     \
+                : "cc");                        \
+            q;                                  \
+        })
+#  define REMAINDER_IS_ALREADY_CALCULATED
 #  endif /* __<cpu> */
 # endif /* __GNUC__ */
 #endif /* OPENSSL_NO_ASM */
@@ -268,6 +282,11 @@ int BN_div(BIGNUM *dv, BIGNUM *rm, const BIGNUM *num, const BIGNUM *divisor,
                         q=(BN_ULONG)(((((BN_ULLONG)n0)<<BN_BITS2)|n1)/d0);
 #else
                         q=bn_div_words(n0,n1,d0);
+#ifdef BN_DEBUG_LEVITTE
+                        fprintf(stderr,"DEBUG: bn_div_words(0x%08X,0x%08X,0x%08\
+X) -> 0x%08X\n",
+                                n0, n1, d0, q);
+#endif
 #endif
 
 #ifndef REMAINDER_IS_ALREADY_CALCULATED
@@ -292,11 +311,18 @@ int BN_div(BIGNUM *dv, BIGNUM *rm, const BIGNUM *num, const BIGNUM *divisor,
                         BN_ULONG t2l,t2h,ql,qh;
 
                         q=bn_div_words(n0,n1,d0);
+#ifdef BN_DEBUG_LEVITTE
+                        fprintf(stderr,"DEBUG: bn_div_words(0x%08X,0x%08X,0x%08\
+X) -> 0x%08X\n",
+                                n0, n1, d0, q);
+#endif
 #ifndef REMAINDER_IS_ALREADY_CALCULATED
                         rem=(n1-q*d0)&BN_MASK2;
 #endif
 
-#ifdef BN_UMULT_HIGH
+#if defined(BN_UMULT_LOHI)
+                        BN_UMULT_LOHI(t2l,t2h,d1,q);
+#elif defined(BN_UMULT_HIGH)
                         t2l = d1 * q;
                         t2h = BN_UMULT_HIGH(d1,q);
 #else