mirror of
https://gitlab.com/buildroot.org/buildroot.git
synced 2026-09-30 14:01:57 -09:00
672e27ec30
The AMD Bulldozer family (bdver1 to bdver4, i.e. bulldozer, piledriver,
steamroller and excavator) is the only x86 family implementing the XOP
instruction set, together with the equally Bulldozer-specific FMA4 and
LWP extensions, and TBM starting with bdver2. All of them were dropped
again with Zen.
This can be verified with:
$ gcc -march=bdver1 -Q --help=target | grep -E '\-m(xop|fma4|tbm|lwp)'
-mfma4 [enabled]
-mlwp [enabled]
-mtbm [disabled]
-mxop [enabled]
$ gcc -march=bdver2 -Q --help=target | grep -E '\-m(xop|fma4|tbm|lwp)'
-mfma4 [enabled]
-mlwp [enabled]
-mtbm [enabled]
-mxop [enabled]
with bdver3 and bdver4 behaving like bdver2.
Add a hidden BR2_X86_CPU_HAS_XOP capability symbol and select it from
those four CPU variants, so that packages which cannot cope with this
instruction set can depend on it, instead of listing the CPU variants
one by one. The first user is host-qemu, whose TCG engine does not
implement XOP.
Signed-off-by: Yegor Yefremov <yegorslists@googlemail.com>
Assisted-by: Claude:claude-opus-5
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
(cherry picked from commit f91407f012)
Signed-off-by: Raphaël Mélotte <raphael.melotte@mind.be>