[svn-r9755] Purpose: New feature

Description:  Start to support software conversion between long double and
all integers.

Solution:  No major changes to the algorithm.  Changes to configure is to
exclude SGI for long double to integers test because there're too many problems
in their compiler.

Platforms tested:  h5committest, modi4, fuss, Teragrid, arabica

Misc. update:  RELEASE.txt

2 files changed, 33 insertions, 0 deletions

diff --git a/config/irix5.x b/config/irix5.x
index 3624e7f..77b35c8 100644
--- a/config/irix5.x
+++ b/config/irix5.x
@@ -48,3 +48,22 @@ case "X-$CC_BASENAME" in
     PROFILE_CPPFLAGS=
     ;;
 esac
+
+# Hard set flag to indicate that the 'unsigned long long' to floating-point
+# value conversion are broken by the compilers (as of 4/27/04 - QAK)
+hdf5_cv_sw_ulong_to_fp_bottom_bit_works=${hdf5_cv_sw_ulong_to_fp_bottom_bit_works='no'}
+
+# Set flag to avoid conversion between 'long double' and integers because of 
+# SGI's compiler problems.  For both IRIX64 6.5 and IRIX 6.5, the compilers
+# have the following problems,
+#       long double -> signed char : incorrect rounding
+#       long double -> unsigned char : incorrect rounding
+#       long double -> short : incorrect rounding
+#       long double -> unsigned short : incorrect rounding
+#       long double -> long or long long: incorrect value
+#       long double -> unsigned long or long long : incorrect value
+#
+#       long or long long -> long double : correct value but incorrect bit pattern
+#       unsigned long or long long -> long double : correct value but incorrect bit pattern
+# (1/5/05 - SLU)
+hdf5_cv_sw_ldouble_to_int_works=${hdf5_cv_sw_ldouble_to_int_works='no'}
diff --git a/config/irix6.x b/config/irix6.x
index 2481e1e..293f2c8 100644
--- a/config/irix6.x
+++ b/config/irix6.x
@@ -146,3 +146,17 @@ fi
 # value conversion are broken by the compilers (as of 4/27/04 - QAK)
 hdf5_cv_sw_ulong_to_fp_bottom_bit_works=${hdf5_cv_sw_ulong_to_fp_bottom_bit_works='no'}
 
+# Set flag to avoid conversion between 'long double' and integers because of 
+# SGI's compiler problems.  For both IRIX64 6.5 and IRIX 6.5, the compilers
+# have the following problems,
+#       long double -> signed char : incorrect rounding
+#       long double -> unsigned char : incorrect rounding
+#       long double -> short : incorrect rounding
+#       long double -> unsigned short : incorrect rounding
+#       long double -> long or long long: incorrect value
+#       long double -> unsigned long or long long : incorrect value
+#
+#       long or long long -> long double : correct value but incorrect bit pattern
+#       unsigned long or long long -> long double : correct value but incorrect bit pattern
+# (1/5/05 - SLU)
+hdf5_cv_sw_ldouble_to_int_works=${hdf5_cv_sw_ldouble_to_int_works='no'}