All of lore.kernel.org
 help / color / mirror / Atom feed
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


             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

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=20240327171737.27622-1-xry111@xry111.site \
    --to=xry111@xry111.site \
    --cc=chenhuacai@kernel.org \
    --cc=kernel@xen0n.name \
    --cc=linux-kernel@vger.kernel.org \
    --cc=loongarch@lists.linux.dev \
    --cc=yangtiezhu@loongson.cn \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body. 
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.