mirrors/cosmopolitan
1
0
Fork 0
mirror of https://github.com/jart/cosmopolitan.git synced 2025-07-02 09:18:31 +00:00
Code Issues Projects Releases Packages Wiki Activity Actions

Make atomics faster on aarch64

Browse source 
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
No known key found for this signature in database
GPG key ID: BE714B4575D6E328
12 changed files with 2053 additions and 71 deletions
Download patch file Download diff file Expand all files Collapse all files

2
tool/cosmocc/bin/cosmocc
View file

@ -343,7 +343,7 @@ LDLIBS_X86_64="-lcosmo"
CRT_AARCH64="$LIB_AARCH64/crt.o"
CPPFLAGS_AARCH64="$CPPFLAGS -fsigned-char"
CFLAGS_AARCH64="$CFLAGS -ffixed-x18 -ffixed-x28 -mno-outline-atomics"
CFLAGS_AARCH64="$CFLAGS -ffixed-x18 -ffixed-x28"
LDFLAGS_AARCH64="$LDFLAGS -L$LIB_AARCH64 -L$BIN/../aarch64-linux-cosmo/lib -Wl,-T,$LIB_AARCH64/aarch64.lds -Wl,-z,common-page-size=16384 -Wl,-z,max-page-size=16384"
LDLIBS_AARCH64="-lcosmo"

2
tool/cosmocc/bin/cosmocross
View file

@ -131,7 +131,7 @@ elif [ x"$ARCH" = x"aarch64" ]; then
OBJCOPYFLAGS="-S"
PAGESZ=16384
CPPFLAGS="$CPPFLAGS -fsigned-char"
CFLAGS="$CFLAGS -ffixed-x18 -ffixed-x28 -mno-outline-atomics"
CFLAGS="$CFLAGS -ffixed-x18 -ffixed-x28"
LDFLAGS="$LDFLAGS -Wl,-T,$LIB/aarch64.lds"
else
fatal_error "$ARCH: unsupported architecture"