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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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12 changed files with 2053 additions and 71 deletions
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Makefile
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@ -132,7 +132,7 @@ endif
ifneq ($(findstring aarch64,$(MODE)),)
ARCH = aarch64
HOSTS ?= pi studio freebsdarm
HOSTS ?= pi pi5 studio freebsdarm
else
ARCH = x86_64
HOSTS ?= freebsd rhel7 xnu openbsd netbsd win10