diff options
| author | Jim Kukunas <james.t.kukunas@linux.intel.com> | 2012-05-22 13:54:04 +1000 |
|---|---|---|
| committer | NeilBrown <neilb@suse.de> | 2012-05-22 13:54:04 +1000 |
| commit | ea4d26ae24e58fbd2c61de9242adab053cb982d8 (patch) | |
| tree | 3115dd168f0cf1eb1eb5dd6aecc385cfa0e8bc05 /arch/x86/Makefile | |
| parent | 56a519913eeba2bdae4d7ee39e80fab442c3836c (diff) | |
| download | lwn-ea4d26ae24e58fbd2c61de9242adab053cb982d8.tar.gz lwn-ea4d26ae24e58fbd2c61de9242adab053cb982d8.zip | |
raid5: add AVX optimized RAID5 checksumming
Optimize RAID5 xor checksumming by taking advantage of
256-bit YMM registers introduced in AVX.
Signed-off-by: Jim Kukunas <james.t.kukunas@linux.intel.com>
Signed-off-by: NeilBrown <neilb@suse.de>
Diffstat (limited to 'arch/x86/Makefile')
| -rw-r--r-- | arch/x86/Makefile | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/arch/x86/Makefile b/arch/x86/Makefile index 41a7237606a3..7a1cc9ee5c8a 100644 --- a/arch/x86/Makefile +++ b/arch/x86/Makefile @@ -115,9 +115,10 @@ cfi-sections := $(call as-instr,.cfi_sections .debug_frame,-DCONFIG_AS_CFI_SECTI # does binutils support specific instructions? asinstr := $(call as-instr,fxsaveq (%rax),-DCONFIG_AS_FXSAVEQ=1) +avx_instr := $(call as-instr,vxorps %ymm0$(comma)%ymm1$(comma)%ymm2,-DCONFIG_AS_AVX=1) -KBUILD_AFLAGS += $(cfi) $(cfi-sigframe) $(cfi-sections) $(asinstr) -KBUILD_CFLAGS += $(cfi) $(cfi-sigframe) $(cfi-sections) $(asinstr) +KBUILD_AFLAGS += $(cfi) $(cfi-sigframe) $(cfi-sections) $(asinstr) $(avx_instr) +KBUILD_CFLAGS += $(cfi) $(cfi-sigframe) $(cfi-sections) $(asinstr) $(avx_instr) LDFLAGS := -m elf_$(UTS_MACHINE) |