Hi,
Andrew Haley <aph-gcc@xxxxxxxxxxxxxxxxxxx> wrote:
[...]
BUILT_IN_PREFETCH was added here:
r47582 | janis | 2001-12-04 00:50:35 +0000 (Tue, 04 Dec 2001) | 6 lines
* builtin-types.def (BT_FN_VOID_PTR_INT_INT): New.
* builtins.def (BUILT_IN_PREFETCH): New.
* builtins.c (expand_builtin_expect): New.
(expand_builtin): Call it.
* doc/extend.texi: Document __builtin_expect.
So every version of gcc that branched since then has it. That would
be, I think, 3.1 onwards.
Whether __builtin_prefetc does anything or not depends on the
particular back end you're using.
I'm using gcc 4.1.0. Can I disable the prefetch instructions using this
gcc version?
Best regards
Jakob
