crypto/bn/*: x86[_64] division instruction doesn't handle constants, change constraint from 'g' to 'r'.

Reviewed-by: Rich Salz <rsalz@openssl.org>
Reviewed-by: Tim Hudson <tjh@openssl.org>

crypto/bn/asm/x86_64-gcc.c

diff --git a/crypto/bn/asm/x86_64-gcc.c b/crypto/bn/asm/x86_64-gcc.c
index d46109a..4f19abe 100644
--- a/crypto/bn/asm/x86_64-gcc.c
+++ b/crypto/bn/asm/x86_64-gcc.c
@@ -203,7 +203,7 @@
     BN_ULONG ret, waste;
 
  asm("divq      %4":"=a"(ret), "=d"(waste)
- :     "a"(l), "d"(h), "g"(d)
+ :     "a"(l), "d"(h), "r"(d)
  :     "cc");
 
     return ret;

crypto/bn/bn_div.c

diff --git a/crypto/bn/bn_div.c b/crypto/bn/bn_div.c
index 0bec12b..99abf35 100644
--- a/crypto/bn/bn_div.c
+++ b/crypto/bn/bn_div.c
@@ -105,7 +105,7 @@
         ({  asm volatile (                      \
                 "divl   %4"                     \
                 : "=a"(q), "=d"(rem)            \
-                : "a"(n1), "d"(n0), "g"(d0)     \
+                : "a"(n1), "d"(n0), "r"(d0)     \
                 : "cc");                        \
             q;                                  \
         })
@@ -120,7 +120,7 @@
         ({  asm volatile (                      \
                 "divq   %4"                     \
                 : "=a"(q), "=d"(rem)            \
-                : "a"(n1), "d"(n0), "g"(d0)     \
+                : "a"(n1), "d"(n0), "r"(d0)     \
                 : "cc");                        \
             q;                                  \
         })