From: "Marek Behún" <kabel@kernel.org> To: Greg Kroah-Hartman <gregkh@linuxfoundation.org>, Stephen Boyd <sboyd@kernel.org> Cc: "Gregory Clement" <gregory.clement@bootlin.com>, "Pali Rohár" <pali@kernel.org>, linux-clk@vger.kernel.org, linux-serial@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, "Marek Behún" <kabel@kernel.org> Subject: [PATCH v9 1/6] math64: New DIV_U64_ROUND_CLOSEST helper Date: Sat, 19 Feb 2022 16:28:13 +0100 [thread overview] Message-ID: <20220219152818.4319-2-kabel@kernel.org> (raw) In-Reply-To: <20220219152818.4319-1-kabel@kernel.org> From: Pali Rohár <pali@kernel.org> Provide DIV_U64_ROUND_CLOSEST helper which uses div_u64 to perform division rounded to the closest integer using unsigned 64bit dividend and unsigned 32bit divisor. Signed-off-by: Pali Rohár <pali@kernel.org> Reviewed-by: Marek Behún <kabel@kernel.org> Signed-off-by: Marek Behún <kabel@kernel.org> --- include/linux/math64.h | 13 +++++++++++++ 1 file changed, 13 insertions(+) diff --git a/include/linux/math64.h b/include/linux/math64.h index 2928f03d6d46..a14f40de1dca 100644 --- a/include/linux/math64.h +++ b/include/linux/math64.h @@ -300,6 +300,19 @@ u64 mul_u64_u64_div_u64(u64 a, u64 mul, u64 div); #define DIV64_U64_ROUND_CLOSEST(dividend, divisor) \ ({ u64 _tmp = (divisor); div64_u64((dividend) + _tmp / 2, _tmp); }) +/* + * DIV_U64_ROUND_CLOSEST - unsigned 64bit divide with 32bit divisor rounded to nearest integer + * @dividend: unsigned 64bit dividend + * @divisor: unsigned 32bit divisor + * + * Divide unsigned 64bit dividend by unsigned 32bit divisor + * and round to closest integer. + * + * Return: dividend / divisor rounded to nearest integer + */ +#define DIV_U64_ROUND_CLOSEST(dividend, divisor) \ + ({ u32 _tmp = (divisor); div_u64((u64)(dividend) + _tmp / 2, _tmp); }) + /* * DIV_S64_ROUND_CLOSEST - signed 64bit divide with 32bit divisor rounded to nearest integer * @dividend: signed 64bit dividend -- 2.34.1
WARNING: multiple messages have this Message-ID (diff)
From: "Marek Behún" <kabel@kernel.org> To: Greg Kroah-Hartman <gregkh@linuxfoundation.org>, Stephen Boyd <sboyd@kernel.org> Cc: "Gregory Clement" <gregory.clement@bootlin.com>, "Pali Rohár" <pali@kernel.org>, linux-clk@vger.kernel.org, linux-serial@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, "Marek Behún" <kabel@kernel.org> Subject: [PATCH v9 1/6] math64: New DIV_U64_ROUND_CLOSEST helper Date: Sat, 19 Feb 2022 16:28:13 +0100 [thread overview] Message-ID: <20220219152818.4319-2-kabel@kernel.org> (raw) In-Reply-To: <20220219152818.4319-1-kabel@kernel.org> From: Pali Rohár <pali@kernel.org> Provide DIV_U64_ROUND_CLOSEST helper which uses div_u64 to perform division rounded to the closest integer using unsigned 64bit dividend and unsigned 32bit divisor. Signed-off-by: Pali Rohár <pali@kernel.org> Reviewed-by: Marek Behún <kabel@kernel.org> Signed-off-by: Marek Behún <kabel@kernel.org> --- include/linux/math64.h | 13 +++++++++++++ 1 file changed, 13 insertions(+) diff --git a/include/linux/math64.h b/include/linux/math64.h index 2928f03d6d46..a14f40de1dca 100644 --- a/include/linux/math64.h +++ b/include/linux/math64.h @@ -300,6 +300,19 @@ u64 mul_u64_u64_div_u64(u64 a, u64 mul, u64 div); #define DIV64_U64_ROUND_CLOSEST(dividend, divisor) \ ({ u64 _tmp = (divisor); div64_u64((dividend) + _tmp / 2, _tmp); }) +/* + * DIV_U64_ROUND_CLOSEST - unsigned 64bit divide with 32bit divisor rounded to nearest integer + * @dividend: unsigned 64bit dividend + * @divisor: unsigned 32bit divisor + * + * Divide unsigned 64bit dividend by unsigned 32bit divisor + * and round to closest integer. + * + * Return: dividend / divisor rounded to nearest integer + */ +#define DIV_U64_ROUND_CLOSEST(dividend, divisor) \ + ({ u32 _tmp = (divisor); div_u64((u64)(dividend) + _tmp / 2, _tmp); }) + /* * DIV_S64_ROUND_CLOSEST - signed 64bit divide with 32bit divisor rounded to nearest integer * @dividend: signed 64bit dividend -- 2.34.1 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
next prev parent reply other threads:[~2022-02-19 15:28 UTC|newest] Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top 2022-02-19 15:28 [PATCH v9 0/6] serial: mvebu-uart: Support for higher baudrates Marek Behún 2022-02-19 15:28 ` Marek Behún 2022-02-19 15:28 ` Marek Behún [this message] 2022-02-19 15:28 ` [PATCH v9 1/6] math64: New DIV_U64_ROUND_CLOSEST helper Marek Behún 2022-02-19 15:28 ` [PATCH v9 2/6] dt-bindings: mvebu-uart: document DT bindings for marvell,armada-3700-uart-clock Marek Behún 2022-02-19 15:28 ` [PATCH v9 2/6] dt-bindings: mvebu-uart: document DT bindings for marvell, armada-3700-uart-clock Marek Behún 2022-02-24 23:01 ` [PATCH v9 2/6] dt-bindings: mvebu-uart: document DT bindings for marvell,armada-3700-uart-clock Stephen Boyd 2022-02-24 23:01 ` [PATCH v9 2/6] dt-bindings: mvebu-uart: document DT bindings for marvell, armada-3700-uart-clock Stephen Boyd 2022-02-19 15:28 ` [PATCH v9 3/6] serial: mvebu-uart: implement UART clock driver for configuring UART base clock Marek Behún 2022-02-19 15:28 ` Marek Behún 2022-02-24 23:02 ` Stephen Boyd 2022-02-24 23:02 ` Stephen Boyd 2022-02-19 15:28 ` [PATCH v9 4/6] dt-bindings: mvebu-uart: update information about UART clock Marek Behún 2022-02-19 15:28 ` Marek Behún 2022-02-24 23:02 ` Stephen Boyd 2022-02-24 23:02 ` Stephen Boyd 2022-02-19 15:28 ` [PATCH v9 5/6] serial: mvebu-uart: implement support for baudrates higher than 230400 Bd Marek Behún 2022-02-19 15:28 ` Marek Behún 2022-02-19 15:28 ` [PATCH v9 6/6] arm64: dts: marvell: armada-37xx: add device node for UART clock and use it Marek Behún 2022-02-19 15:28 ` Marek Behún 2022-02-25 19:32 ` [PATCH v9 0/6] serial: mvebu-uart: Support for higher baudrates Pali Rohár 2022-02-25 19:32 ` Pali Rohár 2022-02-25 19:39 ` Marek Behún 2022-02-25 19:39 ` Marek Behún
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=20220219152818.4319-2-kabel@kernel.org \ --to=kabel@kernel.org \ --cc=gregkh@linuxfoundation.org \ --cc=gregory.clement@bootlin.com \ --cc=linux-arm-kernel@lists.infradead.org \ --cc=linux-clk@vger.kernel.org \ --cc=linux-kernel@vger.kernel.org \ --cc=linux-serial@vger.kernel.org \ --cc=pali@kernel.org \ --cc=sboyd@kernel.org \ /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: linkBe 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.