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tune-corei7.inc: update TUNE_CCARGS -march CPU type corei7 -> nehalem

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The gcc "corei7" CPU type was last documented in gcc 4.8.x and has
been undocumented from gcc 4.9.x onwards:

  https://gcc.gnu.org/onlinedocs/gcc-4.8.5/gcc/i386-and-x86-64-Options.html
  https://gcc.gnu.org/onlinedocs/gcc-4.9.4/gcc/i386-and-x86-64-Options.html

Although it still seems to be accepted by gcc 7.x, it's likely to be
deprecated and removed at some point. To preempt that, switch the
corei7 TUNE_CCARGS -march CPU type to "nehalem", which is the closest
replacement (and matches the CPU type already being passed to qemu).

Since the tune-corei7.inc include file is intended to cover a range
of CPUs from Nehalem onwards, switch the TUNE_CCARGS -mtune option
from "corei7" to "generic", which instructs gcc to produce code
optimized for the most common IA32/AMD64/EM64T processors.

(From OE-Core rev: 8d2f51e9b8d5b27fc61d148a6dd5f6ef5715d6e6)

Signed-off-by: Andre McCurdy <armccurdy@gmail.com>
Signed-off-by: Ross Burton <ross.burton@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
This commit is contained in:
Andre McCurdy
2018-04-26 10:57:27 -07:00
committed by Richard Purdie
parent 5c526c37ff
commit 101c65d59e
1 changed files with 4 additions and 5 deletions
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meta/conf/machine/include/tune-corei7.inc
+4 -5
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@@ -1,7 +1,7 @@
# Settings for the GCC(1) cpu-type "corei7":
# Settings for the GCC(1) cpu-type "nehalem":
#
# Intel Core i7 CPU with 64-bit extensions, MMX, SSE, SSE2, SSE3, SSSE3, SSE4.1
# and SSE4.2 instruction set support.
# Intel Nehalem CPU with 64-bit extensions, MMX, SSE, SSE2, SSE3, SSSE3, SSE4.1,
# SSE4.2 and POPCNT instruction set support.
#
# This tune is recommended for Intel Nehalem and Silvermont (e.g. Bay Trail) CPUs
# (and beyond).
@@ -11,10 +11,9 @@ DEFAULTTUNE ?= "corei7-64"
# Pull in the previous tune in to pull in PACKAGE_EXTRA_ARCHS
require conf/machine/include/tune-core2.inc
# Extra tune features
TUNEVALID[corei7] = "Enable corei7 specific processor optimizations"
TUNE_CCARGS .= "${@bb.utils.contains('TUNE_FEATURES', 'corei7', ' -march=corei7 -mtune=corei7 -mfpmath=sse -msse4.2', '', d)}"
TUNE_CCARGS .= "${@bb.utils.contains('TUNE_FEATURES', 'corei7', ' -march=nehalem -mtune=generic -mfpmath=sse -msse4.2', '', d)}"
# Extra tune selections
AVAILTUNES += "corei7-32"