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tune-i686: Add new tune for better support of 686-class CPUs.

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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.

(From OE-Core rev: c08f76ba0654e43074b6b964f728765918dbfb09)

Signed-off-by: Carlos Alberto Lopez Perez <clopez@igalia.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
This commit is contained in:
Carlos Alberto Lopez Perez
2018-01-15 21:02:55 +01:00
committed by Richard Purdie
parent 72544a4ca8
commit d39e961192
2 changed files with 29 additions and 5 deletions
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7
meta/conf/machine/include/tune-core2.inc
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@@ -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"

27
meta/conf/machine/include/tune-i686.inc Normal file
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@@ -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"