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alpha: select ARCH_HAS_FAST_MULTIPLIER

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All Alpha CPUs have hardware integer multiply (MULL/MULQ). EV4 and EV5
implement it in microcode; EV56 and later have fast single-cycle
multiply. Since no EV4 system is likely to run a modern kernel, select
this unconditionally to enable multiply-based fast paths in hweight and
string routines.

Assisted-by: Claude:claude-opus-4-6
Signed-off-by: Matt Turner <mattst88@gmail.com>
Tested-by: Magnus Lindholm <linmag7@gmail.com>
Reviewed-by: Magnus Lindholm <linmag7@gmail.com>
Link: https://lore.kernel.org/r/20260905-arch-kconfig-options-v2-v2-7-83e8245761a2@gmail.com
Signed-off-by: Magnus Lindholm <linmag7@gmail.com>
This commit is contained in:
Matt Turner 2026-09-05 15:29:28 -04:00 committed by Magnus Lindholm
parent b345db9e12
commit d8df465bc4
1 changed files with 1 additions and 0 deletions
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arch/alpha/Kconfig
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@ -7,6 +7,7 @@ config ALPHA
select ARCH_32BIT_USTAT_F_TINODE
select ARCH_HAS_CURRENT_STACK_POINTER
select ARCH_HAS_DMA_OPS if PCI
select ARCH_HAS_FAST_MULTIPLIER
select ARCH_HAS_GCOV_PROFILE_ALL
select ARCH_HAS_UBSAN
select ARCH_MIGHT_HAVE_PC_PARPORT