Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit fb481dd5 authored by Andi Kleen's avatar Andi Kleen Committed by H. Peter Anvin
Browse files

x86: drop -funroll-loops for csum_partial_64.c 



Impact: performance optimization

I did some rebenchmarking with modern compilers and dropping
-funroll-loops makes the function consistently go faster by a few
percent.  So drop that flag.

Thanks to Richard Guenther for a hint.

Signed-off-by: default avatarAndi Kleen <ak@linux.intel.com>
Signed-off-by: default avatarH. Peter Anvin <hpa@zytor.com>
parent a5444d15

arch/x86/lib/Makefile

+0 −3
Original line number Diff line number Diff line
@@ -17,9 +17,6 @@ ifeq ($(CONFIG_X86_32),y) 
        lib-$(CONFIG_X86_USE_3DNOW) += mmx_32.o

else

        obj-y += io_64.o iomap_copy_64.o



        CFLAGS_csum-partial_64.o := -funroll-loops



        lib-y += csum-partial_64.o csum-copy_64.o csum-wrappers_64.o

        lib-y += thunk_64.o clear_page_64.o copy_page_64.o

        lib-y += memmove_64.o memset_64.o