[oe-commits] [openembedded-core] 07/08: tune-i686: Add new tune for better support of 686-class CPUs.

[git at git.openembedded.org]

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rpurdie pushed a commit to branch master
in repository openembedded-core.

commit c08f76ba0654e43074b6b964f728765918dbfb09
Author: Carlos Alberto Lopez Perez <clopez at igalia.com>
AuthorDate: Mon Jan 15 21:02:55 2018 +0100

    tune-i686: Add new tune for better support of 686-class CPUs.
    
    There isn't currently any tune available for i686 x86 optimizations.
    The tune for i586 doesn't enable i686 specific optimizations, and the
    one for core2 enables things that won't work on a i686 CPU (like SSE3).
    
    Make the tune for core2 inherits from this one and move there the
    setting of X86ARCH32.
    
    Signed-off-by: Carlos Alberto Lopez Perez <clopez at igalia.com>
    Signed-off-by: Richard Purdie <richard.purdie at linuxfoundation.org>
---
 meta/conf/machine/include/tune-core2.inc |  7 ++-----
 meta/conf/machine/include/tune-i686.inc  | 27 +++++++++++++++++++++++++++
 2 files changed, 29 insertions(+), 5 deletions(-)

diff --git a/meta/conf/machine/include/tune-core2.inc b/meta/conf/machine/include/tune-core2.inc
index f4ba43f..6a03466 100644
--- a/meta/conf/machine/include/tune-core2.inc
+++ b/meta/conf/machine/include/tune-core2.inc
@@ -8,11 +8,8 @@
 #
 DEFAULTTUNE ?= "core2-32"
 
-# Set x86 target arch to i686, so that glibc enables SSE optimised memcpy, etc.
-X86ARCH32 ?= "i686"
-
 # Include the previous tune to pull in PACKAGE_EXTRA_ARCHS
-require conf/machine/include/tune-i586.inc
+require conf/machine/include/tune-i686.inc
 
 # Extra tune features
 TUNEVALID[core2] = "Enable core2 specific processor optimizations"
@@ -23,7 +20,7 @@ AVAILTUNES += "core2-32"
 TUNE_FEATURES_tune-core2-32 = "${TUNE_FEATURES_tune-x86} core2"
 BASE_LIB_tune-core2-32 = "lib"
 TUNE_PKGARCH_tune-core2-32 = "core2-32"
-PACKAGE_EXTRA_ARCHS_tune-core2-32 = "${PACKAGE_EXTRA_ARCHS_tune-i586} core2-32"
+PACKAGE_EXTRA_ARCHS_tune-core2-32 = "${PACKAGE_EXTRA_ARCHS_tune-i686} core2-32"
 
 AVAILTUNES += "core2-64"
 TUNE_FEATURES_tune-core2-64 = "${TUNE_FEATURES_tune-x86-64} core2"
diff --git a/meta/conf/machine/include/tune-i686.inc b/meta/conf/machine/include/tune-i686.inc
new file mode 100644
index 0000000..bdb4799
--- /dev/null
+++ b/meta/conf/machine/include/tune-i686.inc
@@ -0,0 +1,27 @@
+#
+# The i686 CPU family was introduced with the Intel Pentium Pro in 1995.
+# It has as required feature flags: fpu tsc cx8 cmov.
+#
+# It is the minimum CPU required by the Debian i386 port.
+# https://lists.debian.org/debian-devel-announce/2016/05/msg00001.html
+#
+#
+
+DEFAULTTUNE ?= "i686"
+
+# Set x86 target arch to i686, so that glibc enables SSE optimised memcpy, etc.
+X86ARCH32 ?= "i686"
+
+# Include the previous tune to pull in PACKAGE_EXTRA_ARCHS
+require conf/machine/include/tune-i586.inc
+
+# Extra tune features
+TUNEVALID[i686] = "Enable i686 specific processor optimizations"
+TUNE_CCARGS .= "${@bb.utils.contains('TUNE_FEATURES', 'i686', ' -march=i686', '', d)}"
+
+# Extra tune selections
+AVAILTUNES += "i686"
+TUNE_FEATURES_tune-i686 = "${TUNE_FEATURES_tune-x86} i686"
+BASE_LIB_tune-i686 = "lib"
+TUNE_PKGARCH_tune-i686 = "i686"
+PACKAGE_EXTRA_ARCHS_tune-i686 = "${PACKAGE_EXTRA_ARCHS_tune-i586} i686"

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