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authorAnton Blanchard <anton@samba.org>2010-08-12 16:28:09 +0000
committerBenjamin Herrenschmidt <benh@kernel.crashing.org>2010-11-29 15:48:17 +1100
commit64ff31287693c1f325cb9cb049569c1611438ef1 (patch)
tree3c159d2ca6f967fca13bae17cff19f92e0b3896c /arch/powerpc/lib/Makefile
parent72083646528d4887b920deb71b37e09bc7d227bb (diff)
downloadlinux-64ff31287693c1f325cb9cb049569c1611438ef1.tar.bz2
powerpc: Add support for popcnt instructions
POWER5 added popcntb, and POWER7 added popcntw and popcntd. As a first step this patch does all the work out of line, but it would be nice to implement them as inlines with an out of line fallback. The performance issue with hweight was noticed when disabling SMT on a large (192 thread) POWER7 box. The patch improves that testcase by about 8%. Signed-off-by: Anton Blanchard <anton@samba.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Diffstat (limited to 'arch/powerpc/lib/Makefile')
-rw-r--r--arch/powerpc/lib/Makefile2
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/powerpc/lib/Makefile b/arch/powerpc/lib/Makefile
index 889f2bc106dd..166a6a0ad544 100644
--- a/arch/powerpc/lib/Makefile
+++ b/arch/powerpc/lib/Makefile
@@ -16,7 +16,7 @@ obj-$(CONFIG_HAS_IOMEM) += devres.o
obj-$(CONFIG_PPC64) += copypage_64.o copyuser_64.o \
memcpy_64.o usercopy_64.o mem_64.o string.o \
- checksum_wrappers_64.o
+ checksum_wrappers_64.o hweight_64.o
obj-$(CONFIG_XMON) += sstep.o ldstfp.o
obj-$(CONFIG_KPROBES) += sstep.o ldstfp.o
obj-$(CONFIG_HAVE_HW_BREAKPOINT) += sstep.o ldstfp.o