Read dividend->_mp_size before calling mpz_tdiv_qr.

1 files changed, 3 insertions, 1 deletions

diff --git a/mpz/fdiv_qr.c b/mpz/fdiv_qr.c
index 2abb16ccb..1120fa01f 100644
--- a/mpz/fdiv_qr.c
+++ b/mpz/fdiv_qr.c
@@ -35,6 +35,7 @@ mpz_fdiv_qr (quot, rem, dividend, divisor)
 #endif
 {
   mp_size_t divisor_size = divisor->_mp_size;
+  mp_size_t xsize;
   mpz_t temp_divisor;		/* N.B.: lives until function returns! */
   TMP_DECL (marker);
 
@@ -50,9 +51,10 @@ mpz_fdiv_qr (quot, rem, dividend, divisor)
       divisor = temp_divisor;
     }
 
+  xsize = dividend->_mp_size ^ divisor_size;;
   mpz_tdiv_qr (quot, rem, dividend, divisor);
 
-  if ((divisor_size ^ dividend->_mp_size) < 0 && rem->_mp_size != 0)
+  if (xsize < 0 && rem->_mp_size != 0)
     {
       mpz_sub_ui (quot, quot, 1L);
       mpz_add (rem, rem, divisor);