linux-kernel - [PATCH 1/1] riscv: Enable ARCH_HAS_FAST

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Message-Id: <20200709051922.13110-1-maochenxi@eswin.com>
Date:   Thu,  9 Jul 2020 13:19:22 +0800
From:   Chenxi Mao <maochenxi@...in.com>
To:     paul.walmsley@...ive.com, palmer@...belt.com, aou@...s.berkeley.edu
Cc:     linux-riscv@...ts.infradead.org, linux-kernel@...r.kernel.org,
        chenxi.mao2013@...il.com, Chenxi Mao <maochenxi@...in.com>
Subject: [PATCH 1/1] riscv: Enable ARCH_HAS_FAST_MULTIPLIER for RV64I

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@...in.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
-- 
2.25.1