fp-bit.c (unpack_d): Handle pair of doubles with different signs correctly.

* config/fp-bit.c (unpack_d): Handle pair of doubles with
different signs correctly.

From-SVN: r65405

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 200d2a7..dcf7e58 100644 (file)
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,8 @@
+2003-04-09  Alexandre Oliva  <aoliva@redhat.com>
+
+       * config/fp-bit.c (unpack_d): Handle pair of doubles with
+       different signs correctly.
+
 2003-04-09  Vladimir Makarov  <vmakarov@redhat.com>
 
        * sched-deps.c (reg_pending_barrier_mode): New enumeration.

diff --git a/gcc/config/fp-bit.c b/gcc/config/fp-bit.c
index 2832f96..b8ac298 100644 (file)
--- a/gcc/config/fp-bit.c
+++ b/gcc/config/fp-bit.c
@@ -459,6 +459,7 @@ unpack_d (FLO_union_type * src, fp_number_type * dst)
    if (exp != EXPMAX && exp != 0 && low != 0)
      {
        int lowexp = ((int)(low >> HALFFRACBITS)) & ((1 << EXPBITS) - 1);
+       int lowsign = ((int)(low >> (((HALFFRACBITS + EXPBITS))))) & 1;
        int shift;
        fractype xlow;
 
@@ -472,7 +473,10 @@ unpack_d (FLO_union_type * src, fp_number_type * dst)
         xlow <<= shift;
        else if (shift < 0)
         xlow >>= -shift;
-       fraction += xlow;
+       if (sign == lowsign)
+        fraction += xlow;
+       else
+        fraction -= xlow;
      }
  }
 # else