------- Comment #7 from avi at argo dot co dot il 2006-04-11 15:53 ------- Created an attachment (id=11244) --> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=11244&action=view) bt instruction benchmark
redone the test for test_bit(), this time always forcing a memory access:
Athlon 64:
bt: 3 cycles
generic: 3 cycles
Xeon:
bt: 10 cycles
generic: 4 cycles
so, bt might be usable for -Os, but likely not with the effort.
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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=25671
