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Make atomics faster on aarch64

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This change implements the compiler runtime for ARM v8.1 ISE atomics and
gets rid of the mandatory -mno-outline-atomics flag. It can dramatically
speed things up, on newer ARM CPUs, as indicated by the changed lines in
test/libc/thread/footek_test.c. In llamafile dispatching on hwcap atomic
also shaved microseconds off synchronization barriers.
This commit is contained in:
Justine Tunney 2024-08-16 11:05:37 -07:00
parent de0cde8def
commit 11d9fb521d
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GPG key ID: BE714B4575D6E328
12 changed files with 2053 additions and 71 deletions
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libc/thread/pthread_cancel.c
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@ -354,7 +354,6 @@ static errno_t _pthread_cancel_everyone(void) {
*/
errno_t pthread_cancel(pthread_t thread) {
struct PosixThread *arg;
unassert(thread);
if ((arg = (struct PosixThread *)thread)) {
return _pthread_cancel_single(arg);
} else {