From 7e96cf3c9850dc34d53af73a9ac22b1624994484 Mon Sep 17 00:00:00 2001 From: Paul Barker Date: Fri, 13 Oct 2017 19:25:28 +0000 Subject: 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 Signed-off-by: Ross Burton --- meta/classes/goarch.bbclass | 11 +++++++++++ 1 file changed, 11 insertions(+) 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' -- cgit 1.2.3-korg