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authorDamjan Marion <damarion@cisco.com>2016-05-11 23:07:18 +0200
committerDamjan Marion <damarion@cisco.com>2016-05-19 18:14:38 +0200
commit1c80e831b728ab378949714d5059a0b5b1822a0a (patch)
treee4f3ecfee143f7dee0e9905570d41ca3ee345c83 /build-data/platforms/vpp_lite.mk
parent82e29c455833b5b12e04c89d2dec1106b499e6b0 (diff)
Add support for multiple microarchitectures in single binary
* compiler -march= parameter is changed from native to corei7 so code is always genereted with instructions which are available on the Nehalem microarchitecture (up to SSE4.2) * compiler -mtune= parameter is added so code is optimized for corei7-avx which equals to Sandy Bridge microarchitecture * set of macros is added which allows run-time detection of available cpu instructions (e.g. clib_cpu_supports_avx()) * set of macros is added which allows us to clone graph node funcitons where cloned function is optmized for different microarchitecture Those macros are using following attributes: __attribute__((flatten)) __attribute__((target("arch=core-avx2))) I.e. If applied to foo_node_fn() macro will generate cloned functions foo_node_fn_avx2() and foo_node_fn_avx512() (future) It will also generate function void * foo_node_fn_multiarch_select() which detects available instruction set and returns pointer to the best matching function clone. Change-Id: I2dce0ac92a5ede95fcb56f47f3d1f3c4c040bac0 Signed-off-by: Damjan Marion <damarion@cisco.com>
Diffstat (limited to 'build-data/platforms/vpp_lite.mk')
-rw-r--r--build-data/platforms/vpp_lite.mk6
1 files changed, 4 insertions, 2 deletions
diff --git a/build-data/platforms/vpp_lite.mk b/build-data/platforms/vpp_lite.mk
index 4183700e681..d35d2347e69 100644
--- a/build-data/platforms/vpp_lite.mk
+++ b/build-data/platforms/vpp_lite.mk
@@ -13,6 +13,8 @@
# vector packet processor
vpp_lite_arch = native
+vpp_lite_march = corei7 # Nehalem Instruction set
+vpp_lite_mtune = corei7-avx # Optimize for Sandy Bridge
vpp_lite_native_tools = vppapigen
vpp_lite_uses_dpdk = no
@@ -30,7 +32,7 @@ vpp_lite_debug_TAG_CFLAGS = -g -O0 -DCLIB_DEBUG -DFORTIFY_SOURCE=2 -march=$(MARC
vpp_lite_debug_TAG_LDFLAGS = -g -O0 -DCLIB_DEBUG -DFORTIFY_SOURCE=2 -march=$(MARCH) \
-fstack-protector-all -fPIC -Werror
-vpp_lite_TAG_CFLAGS = -g -O2 -DFORTIFY_SOURCE=2 -march=$(MARCH) \
+vpp_lite_TAG_CFLAGS = -g -O2 -DFORTIFY_SOURCE=2 -march=$(MARCH) -mtune=$(MTUNE) \
-fstack-protector -fPIC -Werror
-vpp_lite_TAG_LDFLAGS = -g -O2 -DFORTIFY_SOURCE=2 -march=$(MARCH) \
+vpp_lite_TAG_LDFLAGS = -g -O2 -DFORTIFY_SOURCE=2 -march=$(MARCH) -mtune=$(MTUNE) \
-fstack-protector -fPIC -Werror