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arch-arm*: add better support for gcc march extensions

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GCC has the ability to pass extensions to the march parameter, which
expand the funcationality of the march.  For example
"-march=armv7ve+simd" adds SIMD to ARMv7.  Currently, there is no way to
expand the march setting without modifying each instance, as you can't
guarantee the ordering when using the existing TUNE_CCARGS.  By
introducing two new variables, TUNE_CCARGS_MARCH and
TUNE_CCARGS_MARCH_OPT, we can enforce that these two go together.

Also, expand existing and create new feature files that use these
variables to expand the functionality.

(From OE-Core rev: 794eb617bfd1997e7a3498812c63a20c58a10554)

Signed-off-by: Jon Mason <jdmason@kudzu.us>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
This commit is contained in:
Jon Mason
2021-08-18 22:52:20 -04:00
committed by Richard Purdie
parent a3c1be72af
commit ff0ea5633a
18 changed files with 37 additions and 27 deletions
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meta/conf/machine/include/arm/arch-armv8a.inc
+3 -5
View File
@@ -1,14 +1,12 @@
DEFAULTTUNE ?= "armv8a-crc"
TUNEVALID[armv8a] = "Enable instructions for ARMv8-a"
TUNE_CCARGS .= "${@bb.utils.contains('TUNE_FEATURES', 'armv8a', ' -march=armv8-a', '', d)}"
TUNEVALID[crc] = "Enable instructions for ARMv8-a Cyclic Redundancy Check (CRC)"
TUNE_CCARGS .= "${@bb.utils.contains('TUNE_FEATURES', 'crc', '+crc', '', d)}"
TUNEVALID[crypto] = "Enable instructions for ARMv8-a cryptographic"
TUNE_CCARGS .= "${@bb.utils.contains('TUNE_FEATURES', 'crypto', '+crypto', '', d)}"
TUNE_CCARGS_MARCH .= "${@bb.utils.contains('TUNE_FEATURES', 'armv8a', ' -march=armv8-a', '', d)}"
MACHINEOVERRIDES =. "${@bb.utils.contains('TUNE_FEATURES', 'armv8a', 'armv8a:', '', d)}"
require conf/machine/include/arm/arch-arm64.inc
require conf/machine/include/arm/feature-arm-crc.inc
require conf/machine/include/arm/feature-arm-crypto.inc
# Little Endian base configs
AVAILTUNES += "armv8a armv8a-crc armv8a-crc-crypto armv8a-crypto"