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Improving the byte swap support for portability

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This commit is contained in:
Peter Boyle
2015-05-01 10:57:33 +01:00
parent c770f96be7
commit 31fd146cc0
5 changed files with 125 additions and 3 deletions
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8
lib/Grid_config.h
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@ -16,6 +16,14 @@
/* GRID_COMMS_NONE */
/* #undef GRID_COMMS_NONE */
/* Define to 1 if you have the declaration of `be64toh', and to 0 if you
don't. */
#define HAVE_DECL_BE64TOH 0
/* Define to 1 if you have the declaration of `ntohll', and to 0 if you don't.
*/
#define HAVE_DECL_NTOHLL 1
/* Define to 1 if you have the <endian.h> header file. */
/* #undef HAVE_ENDIAN_H */

8
lib/Grid_config.h.in
View File

@ -15,6 +15,14 @@
/* GRID_COMMS_NONE */
#undef GRID_COMMS_NONE
/* Define to 1 if you have the declaration of `be64toh', and to 0 if you
don't. */
#undef HAVE_DECL_BE64TOH
/* Define to 1 if you have the declaration of `ntohll', and to 0 if you don't.
*/
#undef HAVE_DECL_NTOHLL
/* Define to 1 if you have the <endian.h> header file. */
#undef HAVE_ENDIAN_H

38
lib/parallelIO/GridNerscIO.h
View File

@ -9,10 +9,42 @@
#ifdef HAVE_ENDIAN_H
#include <endian.h>
#endif
#include <arpa/inet.h>
#define ntohll be64toh
// 64bit endian swap is a portability pain
#ifndef __has_builtin // Optional of course.
#define __has_builtin(x) 0 // Compatibility with non-clang compilers.
#endif
#if HAVE_DECL_BE64TOH
#undef Grid_ntohll
#define Grid_ntohll be64toh
#endif
#if HAVE_DECL_NTOHLL
#undef Grid_ntohll
#define Grid_ntohll ntohll
#endif
#ifndef Grid_ntohll
#if BYTE_ORDER == BIG_ENDIAN
#define Grid_ntohll(A) (A)
#else
#include <arpa/inet.h>
#if __has_builtin(__builtin_bswap64)
#define Grid_ntohll(A) __builtin_bswap64(A)
#else
#error
#endif
#endif
#endif
namespace Grid {
@ -208,7 +240,7 @@ inline void reconstruct3(LorentzColourMatrix & cm)
{
uint64_t * f = (uint64_t *)file_object;
for(int i=0;i*sizeof(uint64_t)<bytes;i++){
f[i] = ntohll(f[i]);
f[i] = Grid_ntohll(f[i]);
}
}
void inline le64toh_v(void *file_object,uint32_t bytes)