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| author | Quincey Koziol <koziol@hdfgroup.org> | 2003-06-24 20:10:36 (GMT) |
|---|---|---|
| committer | Quincey Koziol <koziol@hdfgroup.org> | 2003-06-24 20:10:36 (GMT) |
| commit | e3a8e61c26cd280a74d27340ade9d34a51fdde94 (patch) | |
| tree | f10419a8713bfea1ffe4e43b70758dd91a5843e3 /src/H5detect.c | |
| parent | 90f8e6c9f7eb8d7200e6a7500dfa1c64d364b305 (diff) | |
| download | hdf5-e3a8e61c26cd280a74d27340ade9d34a51fdde94.zip hdf5-e3a8e61c26cd280a74d27340ade9d34a51fdde94.tar.gz hdf5-e3a8e61c26cd280a74d27340ade9d34a51fdde94.tar.bz2 | |
[svn-r7097] Purpose:
Bug fix
Description:
Alignment of some types (namely 'short's) was still not being correctly
detected on some Crays.
Solution:
Revert part of last change which accidentally got the offset of 'short's
wrong on Crays
Correct check for alignment of 'short's on Crays.
Platforms tested:
FreeBSD 4.8 (sleipnir)
h5committest
Cray SV1 (wind)
Cray T3E (hubble)
Cray T90 (gypsy)
Diffstat (limited to 'src/H5detect.c')
| -rw-r--r-- | src/H5detect.c | 25 |
1 files changed, 14 insertions, 11 deletions
diff --git a/src/H5detect.c b/src/H5detect.c index eb8f9ac..f0895b1 100644 --- a/src/H5detect.c +++ b/src/H5detect.c @@ -112,14 +112,14 @@ precision (detected_t *d) */ for (n=0; n<d->size && d->perm[n]<0; n++) /*void*/; d->precision = 8*(d->size-n); - d->offset = 8*n; + d->offset = 0; } else if (d->perm[d->size - 1] < 0) { /* * Higher addresses are padded. */ for (n=0; n<d->size && d->perm[d->size-(n+1)]; n++) /*void*/; d->precision = 8*(d->size-n); - d->offset = 0; + d->offset = 8*n; } else { /* * No padding. @@ -311,7 +311,7 @@ precision (detected_t *d) #if defined(H5_HAVE_LONGJMP) && defined(H5_HAVE_SIGNAL) #define ALIGNMENT(TYPE,INFO) { \ char *volatile _buf=NULL; \ - volatile TYPE _val=0; \ + volatile TYPE _val=1; \ volatile TYPE _val2; \ volatile size_t _ano=0; \ void (*_handler)(int) = signal(SIGBUS, sigbus_handler); \ @@ -322,17 +322,20 @@ precision (detected_t *d) if (_ano<NELMTS(align_g)) { \ *((TYPE*)(_buf+align_g[_ano])) = _val; /*possible SIGBUS or SEGSEGV*/ \ _val2 = *((TYPE*)(_buf+align_g[_ano])); /*possible SIGBUS or SEGSEGV*/ \ - /* Cray Check: This section helps detect alignment on Cray's */ \ + /* Cray Check: This section helps detect alignment on Cray's */ \ /* vector machines (like the SV1) which mask off */ \ - /* pointer values when pointing to non-word aligned */ \ - /* locations with pointers that are supposed to be */ \ - /* word aligned. -QAK */ \ - memset(_buf, 0xff, sizeof(TYPE)+align_g[NELMTS(align_g)-1]); \ - memcpy(_buf+align_g[_ano]+(INFO.offset/8),((char *)&_val)+(INFO.offset/8),(INFO.precision/8)); \ - _val2 = *((TYPE*)(_buf+align_g[_ano])); \ + /* pointer values when pointing to non-word aligned */ \ + /* locations with pointers that are supposed to be */ \ + /* word aligned. -QAK */ \ + memset(_buf, 0xff, sizeof(TYPE)+align_g[NELMTS(align_g)-1]); \ + if(INFO.perm[0]) /* Big-Endian */ \ + memcpy(_buf+align_g[_ano]+(INFO.size-((INFO.offset+INFO.precision)/8)),((char *)&_val)+(INFO.size-((INFO.offset+INFO.precision)/8)),(INFO.precision/8)); \ + else /* Little-Endian */ \ + memcpy(_buf+align_g[_ano]+(INFO.offset/8),((char *)&_val)+(INFO.offset/8),(INFO.precision/8)); \ + _val2 = *((TYPE*)(_buf+align_g[_ano])); \ if(_val!=_val2) \ longjmp(jbuf_g, 1); \ - /* End Cray Check */ \ + /* End Cray Check */ \ (INFO.align)=align_g[_ano]; \ } else { \ (INFO.align)=0; \ |