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| author | Kristoffer Brånemyr <ztion1@yahoo.se> | 2021-02-03 10:35:22 +0100 |
|---|---|---|
| committer | Pádraig Brady <P@draigBrady.com> | 2021-03-15 12:44:22 +0000 |
| commit | 4b9118cdb316093e1733264d229c6b7279179e1e (patch) | |
| tree | 9ca092b67f5aec8352b67abf6abba496ce423ae3 /src/local.mk | |
| parent | 90c4ef1f7d21a4df0429f93b43efbe1dc8c572f2 (diff) | |
| download | coreutils-4b9118cdb316093e1733264d229c6b7279179e1e.tar.gz | |
cksum: use pclmul hardware instruction for CRC32 calculation
Use cpuid to detect CPU support for hardware instruction.
Fall back to slice by 8 algorithm if not supported.
A 500MiB file improves from 1.40s to 0.67s on an i3-2310M
* configure.ac [USE_PCLMUL_CRC32]: A new conditional,
set when __get_cpuid() and clmul compiler intrinsics are supported.
* src/cksum.c (pclmul_supported): A new function using __get_cpuid()
to determine if pclmul instructions are supported.
(cksum): A new function refactored from cksum_slice8(),
which calls pclmul_supported() and then cksum_slice8()
or cksum_pclmul() as appropriate.
* src/cksum.h: Export the crctab array for use in the new module.
* src/cksum_pclmul.c: A new module to implement using pclmul intrinsics.
* po/POTFILES.in: Reference the new cksum_pclmul module.
* src/local.mk: Likewise. Note we build it as a separate library
so that it can be portably built with separate -mavx etc. flags.
* tests/misc/cksum.sh: Add new test modes for pertinent buffer sizes.
Diffstat (limited to 'src/local.mk')
| -rw-r--r-- | src/local.mk | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/src/local.mk b/src/local.mk index b9e81d9a3..8c8479a53 100644 --- a/src/local.mk +++ b/src/local.mk @@ -359,6 +359,13 @@ nodist_src_coreutils_SOURCES = src/coreutils.h src_coreutils_SOURCES = src/coreutils.c src_cksum_SOURCES = src/cksum.c src/cksum.h +if USE_PCLMUL_CRC32 +noinst_LIBRARIES += src/libcksum_pclmul.a +src_libcksum_pclmul_a_SOURCES = src/cksum_pclmul.c src/cksum.h +cksum_pclmul_ldadd = src/libcksum_pclmul.a +src_cksum_LDADD += $(cksum_pclmul_ldadd) +src_libcksum_pclmul_a_CFLAGS = -mavx -mpclmul $(AM_CFLAGS) +endif src_cp_SOURCES = src/cp.c $(copy_sources) $(selinux_sources) src_dir_SOURCES = src/ls.c src/ls-dir.c src_env_SOURCES = src/env.c src/operand2sig.c |