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authorPaul Barker <pbarker@toganlabs.com>2017-10-13 19:25:28 +0000
committerRichard Purdie <richard.purdie@linuxfoundation.org>2017-10-16 23:52:04 +0100
commit7e96cf3c9850dc34d53af73a9ac22b1624994484 (patch)
treeba298f764f7ee91dcdf801a587ba4b1cbaf97fa2
parent8cf2e5b1d9c0b5d3133dc9e341051c40d695f2a9 (diff)
downloadopenembedded-core-contrib-7e96cf3c9850dc34d53af73a9ac22b1624994484.tar.gz
goarch.bbclass: Define HOST_GO386 and TARGET_GO386
These variables are used to control the floating-point instructions emitted by the go compiler for x86 architectures. The default is '387' which disables the use of sse/sse2 instructions and is safe to use on all x86 processors from the i486 onwards. If TUNE_FEATURES contains a feature set which is known to support sse/sse2 instructions then they are set to 'sse2' to enable the use of these instructions. This is suitable for most processors from Pentium 4 onwards. Only the 'core2' and 'corei7' TUNE_FEATURES are defined in the oe-core layer and are known to support ss2 instructions. Other layers may introduce additional tunings which support sse2 instructions and for these layers, TARGET_GO386 or go_map_386 should be overridden as needed. Signed-off-by: Paul Barker <pbarker@toganlabs.com> Signed-off-by: Ross Burton <ross.burton@intel.com>
-rw-r--r--meta/classes/goarch.bbclass11
1 files changed, 11 insertions, 0 deletions
diff --git a/meta/classes/goarch.bbclass b/meta/classes/goarch.bbclass
index 659b26a09e..653f035739 100644
--- a/meta/classes/goarch.bbclass
+++ b/meta/classes/goarch.bbclass
@@ -4,10 +4,12 @@ BUILD_GOTUPLE = "${BUILD_GOOS}_${BUILD_GOARCH}"
HOST_GOOS = "${@go_map_os(d.getVar('HOST_OS'), d)}"
HOST_GOARCH = "${@go_map_arch(d.getVar('HOST_ARCH'), d)}"
HOST_GOARM = "${@go_map_arm(d.getVar('HOST_ARCH'), d.getVar('TUNE_FEATURES'), d)}"
+HOST_GO386 = "${@go_map_386(d.getVar('HOST_ARCH'), d.getVar('TUNE_FEATURES'), d)}"
HOST_GOTUPLE = "${HOST_GOOS}_${HOST_GOARCH}"
TARGET_GOOS = "${@go_map_os(d.getVar('TARGET_OS'), d)}"
TARGET_GOARCH = "${@go_map_arch(d.getVar('TARGET_ARCH'), d)}"
TARGET_GOARM = "${@go_map_arm(d.getVar('TARGET_ARCH'), d.getVar('TUNE_FEATURES'), d)}"
+TARGET_GO386 = "${@go_map_386(d.getVar('TARGET_ARCH'), d.getVar('TUNE_FEATURES'), d)}"
TARGET_GOTUPLE = "${TARGET_GOOS}_${TARGET_GOARCH}"
GO_BUILD_BINDIR = "${@['bin/${HOST_GOTUPLE}','bin'][d.getVar('BUILD_GOTUPLE') == d.getVar('HOST_GOTUPLE')]}"
@@ -66,6 +68,15 @@ def go_map_arm(a, f, d):
return '5'
return ''
+def go_map_386(a, f, d):
+ import re
+ if re.match('i.86', a):
+ if ('core2' in f) or ('corei7' in f):
+ return 'sse2'
+ else:
+ return '387'
+ return ''
+
def go_map_os(o, d):
if o.startswith('linux'):
return 'linux'