lib/bcd.c

// SPDX-License-Identifier: GPL-2.0
#include <linux/bcd.h>
#include <linux/export.h>

unsigned _bcd2bin(unsigned char val)
{
	return (val & 0x0f) + (val >> 4) * 10;
}
EXPORT_SYMBOL(_bcd2bin);

unsigned char _bin2bcd(unsigned val)
{
	const unsigned int t = (val * 103) >> 10;

	return (t << 4) | (val - t * 10);
}
EXPORT_SYMBOL(_bin2bcd);
License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-01 15:07:57 +01:00			`// SPDX-License-Identifier: GPL-2.0`
rtc: BCD codeshrink 2008-07-23 21:30:37 -07:00			`#include <linux/bcd.h>`
lib: reduce the use of module.h wherever possible 2011-11-16 21:29:17 -05:00			`#include <linux/export.h>`
rtc: BCD codeshrink 2008-07-23 21:30:37 -07:00
usb/core: use bin2bcd() for bcdDevice in RH 2012-09-07 14:31:45 +02:00			`unsigned _bcd2bin(unsigned char val)`
rtc: BCD codeshrink 2008-07-23 21:30:37 -07:00			`{`
			`return (val & 0x0f) + (val >> 4) * 10;`
			`}`
usb/core: use bin2bcd() for bcdDevice in RH 2012-09-07 14:31:45 +02:00			`EXPORT_SYMBOL(_bcd2bin);`
rtc: BCD codeshrink 2008-07-23 21:30:37 -07:00
usb/core: use bin2bcd() for bcdDevice in RH 2012-09-07 14:31:45 +02:00			`unsigned char _bin2bcd(unsigned val)`
rtc: BCD codeshrink 2008-07-23 21:30:37 -07:00			`{`
lib/bcd: optimize _bin2bcd() for improved performance 2024-08-13 01:02:29 +08:00			`const unsigned int t = (val * 103) >> 10;`

			`return (t << 4) \| (val - t * 10);`
rtc: BCD codeshrink 2008-07-23 21:30:37 -07:00			`}`
usb/core: use bin2bcd() for bcdDevice in RH 2012-09-07 14:31:45 +02:00			`EXPORT_SYMBOL(_bin2bcd);`