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ARC: save/restore accumulator registers on all ARCv2 HS CPUs by default

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Accumulator registers (ACCL, ACCH) are used on HS CPUs not only
in case of FPU usage but also in case of MPY usage. We enable MPY
for all ARCv2 HS in commit
18a24c3f6 ARC: gcc-m-cpu: use -mcpu=archs as a default for ARCv2 HS
but we didn't enable accumulator registers management.

Let's enable accumulator registers save/restore on all ARCv2 HS CPUs
by default.

Signed-off-by: Eugeniy Paltsev <Eugeniy.Paltsev@synopsys.com>
Signed-off-by: Evgeniy Paltsev <PaltsevEvgeniy@gmail.com>
This commit is contained in:
Evgeniy Paltsev 2021-07-05 20:05:59 +03:00 • committed by Maureen Helm
commit fbc9fbf92f
1 changed files with 1 additions and 0 deletions
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arch/arc/Kconfig
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@ -252,6 +252,7 @@ config CODE_DENSITY
config ARC_HAS_ACCL_REGS
bool "Reg Pair ACCL:ACCH (FPU and/or MPY > 6)"
default y if CPU_HS3X
default y if FPU
help
Depending on the configuration, CPU can contain accumulator reg-pair