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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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@ -310,7 +310,7 @@ SECTIONS {
. = ALIGN(__privileged_end > __privileged_start ? CONSTANT(COMMONPAGESIZE) : 0);
/*END: morphable code */
__privileged_start = .;
*(.privileged)
*(.privileged .privileged.*)
__privileged_end = .;
KEEP(*(.ape.pad.text))