From nobody Fri Dec 19 14:37:03 2025 Received: from xry111.site (xry111.site [89.208.246.23]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 7BB3530FC2A for ; Wed, 5 Nov 2025 15:14:10 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=89.208.246.23 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1762355652; cv=none; b=GecyMmHAbnaTeOCTTEqGcn2D+KspE7KCBKAAzx3SAri2ZJooPwJH040sfgGDKxa3PIpSUsEgPBT5ykys4oWz0gRGsQRrkB2WCV1THuVeCXOiXYe1NjbTROwJkjETeIVbkjxrpqogGiMDKcyNsGEVCmeavkagr8tdBED18Lq0VxY= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1762355652; c=relaxed/simple; bh=qvi7oIPnIz+eY7U+jHRFqVIGC+y9ZfdAEbH8bTFuxeY=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=bZ6873lJYw9bRTQVJe35QhBdhCgBPbUBh+NSbWkHTrAmKjT1uIyjNb/5E65NPqcpCxH3vaYNg+dq89UO4bQDpaXPVCziD2THyksLlVu/a0dGCE23R81VzxBJWdugGSm+3+JBKe3eW66/uI8woYKTmJ74XAjN+yRcz+b/V3qYQDs= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=xry111.site; spf=pass smtp.mailfrom=xry111.site; dkim=pass (1024-bit key) header.d=xry111.site header.i=@xry111.site header.b=kWIy8uRM; arc=none smtp.client-ip=89.208.246.23 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=xry111.site Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=xry111.site Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=xry111.site header.i=@xry111.site header.b="kWIy8uRM" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=xry111.site; s=default; t=1762355650; bh=cwlZVi0pf4Mx6crAaPM4cCr/ny6B50SfKYt8DlTwuhE=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=kWIy8uRMlHvuT/A0YFD2J6IwfaUYbo+hOrAC+Kk04ouBv1AAA3Qkyt0k++lHjGnv8 X+Lj2wjHnYQm5yfU6fJT/jMEd6ToCqb/NAi6eWcDBMxn98H+VL+M0WFBeCzFfD5wZH 7ZEfD50ZQNf6zQ9VQDc57a3A+Gf2V4hii0554eY4= Received: from stargazer (unknown [IPv6:2408:824e:302:e8a1:c427:8c70:2426:6]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (secp384r1) server-digest SHA384) (Client did not present a certificate) (Authenticated sender: xry111@xry111.site) by xry111.site (Postfix) with ESMTPSA id EEC1066A4D; Wed, 5 Nov 2025 10:14:06 -0500 (EST) From: Xi Ruoyao To: Huacai Chen , WANG Xuerui Cc: Mingcong Bai , Xi Ruoyao , loongarch@lists.linux.dev (open list:LOONGARCH), linux-kernel@vger.kernel.org (open list) Subject: [PATCH 2/2] LoongArch: Simplify __arch_bitrev32 implementation Date: Wed, 5 Nov 2025 23:12:54 +0800 Message-ID: <20251105151257.148530-3-xry111@xry111.site> X-Mailer: git-send-email 2.51.2 In-Reply-To: <20251105151257.148530-1-xry111@xry111.site> References: <20251105151257.148530-1-xry111@xry111.site> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" LoongArch has the bitrev.w instruction to reverse bits in a 32-bit integer, thus there's no need to reverse the bytes and use bitrev.4b. Signed-off-by: Xi Ruoyao --- arch/loongarch/include/asm/bitrev.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/loongarch/include/asm/bitrev.h b/arch/loongarch/include/a= sm/bitrev.h index 46f275b9cdf7..757738ea38d7 100644 --- a/arch/loongarch/include/asm/bitrev.h +++ b/arch/loongarch/include/asm/bitrev.h @@ -11,7 +11,7 @@ static __always_inline __attribute_const__ u32 __arch_bit= rev32(u32 x) { u32 ret; =20 - asm("bitrev.4b %0, %1" : "=3Dr"(ret) : "r"(__swab32(x))); + asm("bitrev.w %0, %1" : "=3Dr"(ret) : "r"(x)); return ret; } =20 --=20 2.51.2