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gcconfig.h (PREFETCH): Use __builtin_prefetch for gcc >= 3.0.

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2004-04-06  H.J. Lu  <hongjiu.lu@intel.com>

	* include/private/gcconfig.h (PREFETCH): Use __builtin_prefetch
	for gcc >= 3.0.
	(PREFETCH_FOR_WRITE): Likewise.

From-SVN: r80459
This commit is contained in:
H.J. Lu 2004-04-06 18:05:05 +00:00 • committed by H.J. Lu
parent bef1d7003f
commit 652466353b
2 changed files with 10 additions and 4 deletions
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6
boehm-gc/ChangeLog
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@ -1,3 +1,9 @@
2004-04-06 H.J. Lu <hongjiu.lu@intel.com>
* include/private/gcconfig.h (PREFETCH): Use __builtin_prefetch
for gcc >= 3.0.
(PREFETCH_FOR_WRITE): Likewise.
2004-03-10 Kelley Cook <kcook@gcc.gnu.org>
* configure.ac: Bump AC_PREREQ to 2.59.

8
boehm-gc/include/private/gcconfig.h
View file

@ -1801,10 +1801,10 @@
extern int etext[];
# define DATASTART ((ptr_t)((((word) (etext)) + 0xfff) & ~0xfff))
# endif
# define PREFETCH(x) \
__asm__ __volatile__ (" prefetch %0": : "m"(*(char *)(x)))
# define PREFETCH_FOR_WRITE(x) \
__asm__ __volatile__ (" prefetchw %0": : "m"(*(char *)(x)))
# if defined(__GNUC__) && __GNUC__ >= 3
# define PREFETCH(x) __builtin_prefetch ((x), 0, 0)
# define PREFETCH_FOR_WRITE(x) __builtin_prefetch ((x), 1)
# endif
# endif
# endif