File PPC64LE-Fix-long-double-handling.patch of Package hdf5.26543
From: Egbert Eich <eich@suse.com>
Date: Tue Nov 7 14:16:53 2017 +0100
Subject: [PATCH]PPC64LE: Fix long double handling
Git-commit: ad6559a71b7ba3cacb4b56d4747db63f28a12f55
References:
Signed-off-by: Egbert Eich <eich@suse.com>
Signed-off-by: Egbert Eich <eich@suse.com>
---
hdf5-1.10.1/config/cmake/ConversionTests.c | 16 ++++++++++++++++
hdf5-1.10.1/test/dt_arith.c | 26 ++++++++++++++++++++++++--
2 files changed, 40 insertions(+), 2 deletions(-)
Index: hdf5-1.10.8/config/cmake/ConversionTests.c
===================================================================
--- hdf5-1.10.8.orig/config/cmake/ConversionTests.c
+++ hdf5-1.10.8/config/cmake/ConversionTests.c
@@ -34,6 +34,14 @@ int HDF_NO_UBSAN main(void)
unsigned char s2[8];
int ret = 1;
+#if defined __powerpc64__ && defined _LITTLE_ENDIAN
+ /* Don't bother checking on ppc64le, we know it'll work, and
+ that what hdf5 calls 'special algorithm' simply is
+ IBM ldouble 128 (i.e. two seperately scaled doubles).
+ The check below assumes big endian. */
+ ret = 0;
+#endif
+
if(sizeof(long double) == 16 && sizeof(long) == 8) {
/*make sure the long double type has 16 bytes in size and
* 11 bits of exponent. If it is,
@@ -157,6 +165,14 @@ int HDF_NO_UBSAN main(void)
unsigned char s[16];
int ret = 0;
+#if defined __powerpc64__ && defined _LITTLE_ENDIAN
+ /* Don't bother checking on ppc64le, we know it'll work, and
+ that what hdf5 calls 'special algorithm' simply is
+ IBM ldouble 128 (i.e. two seperately scaled doubles).
+ The check below assumes big endian. */
+ ret = 0;
+#endif
+
if(sizeof(long double) == 16) {
/*make sure the long double type is the same as the failing type
*which has 16 bytes in size and 11 bits of exponent. If it is,
Index: hdf5-1.10.8/test/dt_arith.c
===================================================================
--- hdf5-1.10.8.orig/test/dt_arith.c
+++ hdf5-1.10.8/test/dt_arith.c
@@ -3040,7 +3040,18 @@ test_conv_flt_1(const char *name, int ru
#if H5_SIZEOF_LONG_DOUBLE != H5_SIZEOF_DOUBLE && H5_SIZEOF_LONG_DOUBLE != 0
}
else if (src_type == FLT_LDOUBLE) {
- INIT_FP_SPECIAL(src_size, src_nbits, sendian, LDBL_MANT_DIG, dst_size, buf, saved, nelmts);
+ size_t mant_dig = LDBL_MANT_DIG;
+ if (mant_dig >= src_nbits) {
+ /* This happens for IBM long double in little endian.
+ The macro LDBL_MANT_DIG says 106 mantissa bits, but the
+ HDF5 detection code actually represents it as a normal 64bit
+ double (52 bit mantissa) with the upper double being
+ unspec bits (which is sort of okay as the testsuite
+ wouldn't deal with that format correctly anyway). So
+ override the mantissa size. */
+ mant_dig = 52;
+ }
+ INIT_FP_SPECIAL(src_size, src_nbits, sendian, mant_dig, dst_size, buf, saved, nelmts);
#endif
}
else
@@ -3750,7 +3761,18 @@ test_conv_int_fp(const char *name, int r
nelmts);
}
else {
- INIT_FP_SPECIAL(src_size, src_nbits, sendian, LDBL_MANT_DIG, dst_size, buf, saved, nelmts);
+ size_t mant_dig = LDBL_MANT_DIG;
+ if (mant_dig >= src_nbits) {
+ /* This happens for IBM long double in little endian.
+ The macro LDBL_MANT_DIG says 106 mantissa bits, but the
+ HDF5 detection code actually represents it as a normal 64bit
+ double (52 bit mantissa) with the upper double being
+ unspec bits (which is sort of okay as the testsuite
+ wouldn't deal with that format correctly anyway). So
+ override the mantissa size. */
+ mant_dig = 52;
+ }
+ INIT_FP_SPECIAL(src_size, src_nbits, sendian, mant_dig, dst_size, buf, saved, nelmts);
}
#endif
}
