Messages in this thread | | | Date | Mon, 20 Jul 2020 18:17:44 -0700 (PDT) | Subject | Re: [PATCH 1/1] riscv: Enable ARCH_HAS_FAST_MULTIPLIER for RV64I | From | Palmer Dabbelt <> |
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On Wed, 08 Jul 2020 22:19:22 PDT (-0700), maochenxi@eswin.com wrote: > Enable ARCH_HAS_FAST_MULTIPLIER on RV64I > which works fine on GCC-9.3 and GCC-10.1 > > PS2: remove ARCH_SUPPORTS_INT128 because of RV64I already enabled. > > Signed-off-by: Chenxi Mao <maochenxi@eswin.com> > --- > arch/riscv/Kconfig | 1 + > 1 file changed, 1 insertion(+) > > diff --git a/arch/riscv/Kconfig b/arch/riscv/Kconfig > index 128192e14ff2..84e6777fecad 100644 > --- a/arch/riscv/Kconfig > +++ b/arch/riscv/Kconfig > @@ -202,6 +202,7 @@ config ARCH_RV64I > bool "RV64I" > select 64BIT > select ARCH_SUPPORTS_INT128 if CC_HAS_INT128 && GCC_VERSION >= 50000 > + select ARCH_HAS_FAST_MULTIPLIER > select HAVE_DYNAMIC_FTRACE if MMU > select HAVE_DYNAMIC_FTRACE_WITH_REGS if HAVE_DYNAMIC_FTRACE > select HAVE_FTRACE_MCOUNT_RECORD
Ah, thanks -- this one didn't show up when I was looking at the last one. I think we can put the fast multiplier on rv32 and rv64, there shouldn't be any difference there. I guess in theory we should be sticking this all in some sort of "platform type" optimization flags, but that's probably bit much for now.
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