diff options
Diffstat (limited to 'config/cmake/ConfigureChecks.cmake')
| -rw-r--r-- | config/cmake/ConfigureChecks.cmake | 41 |
1 files changed, 41 insertions, 0 deletions
diff --git a/config/cmake/ConfigureChecks.cmake b/config/cmake/ConfigureChecks.cmake index e223553..b9f18a9 100644 --- a/config/cmake/ConfigureChecks.cmake +++ b/config/cmake/ConfigureChecks.cmake @@ -33,6 +33,18 @@ endif (HDF5_METADATA_TRACE_FILE) MARK_AS_ADVANCED (HDF5_METADATA_TRACE_FILE) # ---------------------------------------------------------------------- +# Decide whether the data accuracy has higher priority during data +# conversions. If not, some hard conversions will still be prefered even +# though the data may be wrong (for example, some compilers don't +# support denormalized floating values) to maximize speed. +# +option (HDF5_WANT_DATA_ACCURACY "IF data accuracy is guaranteed during data conversions" ON) +if (HDF5_WANT_DATA_ACCURACY) + set (H5_WANT_DATA_ACCURACY 1) +endif (HDF5_WANT_DATA_ACCURACY) +MARK_AS_ADVANCED (HDF5_WANT_DATA_ACCURACY) + +# ---------------------------------------------------------------------- # Decide whether the presence of user's exception handling functions is # checked and data conversion exceptions are returned. This is mainly # for the speed optimization of hard conversions. Soft conversions can @@ -146,6 +158,17 @@ if (NOT WINDOWS) endif (HDF5_ENABLE_DIRECT_VFD) endif (NOT WINDOWS) +#----------------------------------------------------------------------------- +# Check if C has __float128 extension +#----------------------------------------------------------------------------- + +CHECK_TYPE_SIZE("__float128" SIZEOF___FLOAT128) +if(${HAVE_SIZEOF___FLOAT128}) + SET(H5_HAVE_FLOAT128 1) +else (${HAVE_SIZEOF___FLOAT128}) + SET(H5_HAVE_FLOAT128 0) + SET(SIZEOF___FLOAT128 0) +endif(${HAVE_SIZEOF___FLOAT128}) #----------------------------------------------------------------------------- # Macro to determine the various conversion capabilities @@ -220,6 +243,24 @@ H5ConversionTests (H5_LDOUBLE_TO_LONG_SPECIAL "Checking IF your system converts # H5ConversionTests (H5_LONG_TO_LDOUBLE_SPECIAL "Checking IF your system can convert (unsigned) long to long double values with special algorithm") # ---------------------------------------------------------------------- +# Set the flag to indicate that the machine can accurately convert +# 'long double' to '(unsigned) long long' values. (This flag should be set for +# all machines, except for Mac OS 10.4 and SGI IRIX64 6.5. When the bit sequence +# of long double is 0x4351ccf385ebc8a0bfcc2a3c..., the values of (unsigned)long long +# start to go wrong on these two machines. Adjusting it higher to +# 0x4351ccf385ebc8a0dfcc... or 0x4351ccf385ebc8a0ffcc... will make the converted +# values wildly wrong. This test detects this wrong behavior and disable the test. +# +H5ConversionTests (H5_LDOUBLE_TO_LLONG_ACCURATE "Checking IF correctly converting long double to (unsigned) long long values") +# ---------------------------------------------------------------------- +# Set the flag to indicate that the machine can accurately convert +# '(unsigned) long long' to 'long double' values. (This flag should be set for +# all machines, except for Mac OS 10.4, when the bit sequences are 003fff..., +# 007fff..., 00ffff..., 01ffff..., ..., 7fffff..., the converted values are twice +# as big as they should be. +# +H5ConversionTests (H5_LLONG_TO_LDOUBLE_CORRECT "Checking IF correctly converting (unsigned) long long to long double values") +# ---------------------------------------------------------------------- # Check if pointer alignments are enforced # H5ConversionTests (H5_NO_ALIGNMENT_RESTRICTIONS "Checking IF alignment restrictions are strictly enforced") |