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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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2
tool/hello/BUILD.mk
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@ -79,7 +79,7 @@ o/$(MODE)/tool/hello/hello-pe.ape: \
# elf2pe can generate binaries that don't have dll imports
o/$(MODE)/tool/hello/life-pe.dbg: \
o/$(MODE)/tool/hello/life-pe.o
@$(COMPILE) -ALINK.elf $(LINK) $(LINKARGS) $(OUTPUT_OPTION) -q -e WinMain #-Ttext-segment=0x140000000
@$(COMPILE) -ALINK.elf $(LINK) $(LINKARGS) $(OUTPUT_OPTION) -q -e WinMain -Ttext-segment=0x140000000
o/$(MODE)/tool/hello/life-pe.ape: \
o/$(MODE)/tool/hello/life-pe.dbg \
o/$(MODE)/tool/build/elf2pe