From: Xi Ruoyao <xry111@xry111.site>
To: Huacai Chen <chenhuacai@kernel.org>, WANG Xuerui <kernel@xen0n.name>
Cc: loongarch@lists.linux.dev, linux-kernel@vger.kernel.org,
Tiezhu Yang <yangtiezhu@loongson.cn>,
Xi Ruoyao <xry111@xry111.site>
Subject: [PATCH] LoongArch: Select ARCH_SUPPORTS_INT128 if CC_HAS_INT128
Date: Thu, 28 Mar 2024 01:17:37 +0800 [thread overview]
Message-ID: <20240327171737.27622-1-xry111@xry111.site> (raw)
This allows compiling a full 128-bit product of two 64-bit integers as
a mul/mulh pair, instead of a nasty long sequence of 20+ instructions.
Signed-off-by: Xi Ruoyao <xry111@xry111.site>
---
arch/loongarch/Kconfig | 1 +
1 file changed, 1 insertion(+)
diff --git a/arch/loongarch/Kconfig b/arch/loongarch/Kconfig
index a5f300ec6f28..5a769bb92d7c 100644
--- a/arch/loongarch/Kconfig
+++ b/arch/loongarch/Kconfig
@@ -56,6 +56,7 @@ config LOONGARCH
select ARCH_SUPPORTS_ACPI
select ARCH_SUPPORTS_ATOMIC_RMW
select ARCH_SUPPORTS_HUGETLBFS
+ select ARCH_SUPPORTS_INT128 if CC_HAS_INT128
select ARCH_SUPPORTS_LTO_CLANG
select ARCH_SUPPORTS_LTO_CLANG_THIN
select ARCH_SUPPORTS_NUMA_BALANCING
--
2.44.0
next reply other threads:[~2024-03-27 17:18 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-03-27 17:17 Xi Ruoyao [this message]
2024-03-29 2:09 ` [PATCH] LoongArch: Select ARCH_SUPPORTS_INT128 if CC_HAS_INT128 Huacai Chen
2024-04-26 4:00 ` Huacai Chen
2024-04-26 5:53 ` Xi Ruoyao
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