aboutsummaryrefslogtreecommitdiff
path: root/arch/powerpc/Makefile
diff options
context:
space:
mode:
authorArnd Bergmann <arnd@arndb.de>2007-09-15 10:21:57 +1000
committerPaul Mackerras <paulus@samba.org>2007-09-22 14:49:22 +1000
commit3164cccdc0e6e16eb9797586aaa8d1f759799c01 (patch)
tree5685db34bfa546cefcd1f6fc0cbbac8bd11945bb /arch/powerpc/Makefile
parentfb8299ed31d474248c2028ab8393462841cc9b0b (diff)
downloadlinaro-lsk-3164cccdc0e6e16eb9797586aaa8d1f759799c01.tar.gz
[POWERPC] add Kconfig option for optimizing for cell
Since the PPE on cell is an in-order core, it suffers significantly from wrong instruction scheduling. This adds a Kconfig option that enables passing -mtune=cell to gcc in order to generate object code that runs well on cell. Signed-off-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Paul Mackerras <paulus@samba.org>
Diffstat (limited to 'arch/powerpc/Makefile')
-rw-r--r--arch/powerpc/Makefile4
1 files changed, 4 insertions, 0 deletions
diff --git a/arch/powerpc/Makefile b/arch/powerpc/Makefile
index 6015a92bc2a..87aff5372d6 100644
--- a/arch/powerpc/Makefile
+++ b/arch/powerpc/Makefile
@@ -92,6 +92,10 @@ else
endif
endif
+ifeq ($(CONFIG_TUNE_CELL),y)
+ CFLAGS += $(call cc-option,-mtune=cell)
+endif
+
# No AltiVec instruction when building kernel
CFLAGS += $(call cc-option,-mno-altivec)