[linux-block.git] / lib / ashldi3.c

// SPDX-License-Identifier: GPL-2.0-or-later
/*
 */

#include <linux/export.h>

#include <linux/libgcc.h>

long long notrace __ashldi3(long long u, word_type b)
{
	DWunion uu, w;
	word_type bm;

	if (b == 0)
		return u;

	uu.ll = u;
	bm = 32 - b;

	if (bm <= 0) {
		w.s.low = 0;
		w.s.high = (unsigned int) uu.s.low << -bm;
	} else {
		const unsigned int carries = (unsigned int) uu.s.low >> bm;

		w.s.low = (unsigned int) uu.s.low << b;
		w.s.high = ((unsigned int) uu.s.high << b) | carries;
	}

	return w.ll;
}
EXPORT_SYMBOL(__ashldi3);
Commit	Line	Data
588cb88c	1	// SPDX-License-Identifier: GPL-2.0-or-later
b35cd988	2	/*
b35cd988 PD	3	*/
	4
	5	#include <linux/export.h>
	6
4db2b604	7	#include <linux/libgcc.h>
b35cd988 PD	8
	9	long long notrace __ashldi3(long long u, word_type b)
	10	{
	11	DWunion uu, w;
	12	word_type bm;
	13
	14	if (b == 0)
	15	return u;
	16
	17	uu.ll = u;
	18	bm = 32 - b;
	19
	20	if (bm <= 0) {
	21	w.s.low = 0;
	22	w.s.high = (unsigned int) uu.s.low << -bm;
	23	} else {
	24	const unsigned int carries = (unsigned int) uu.s.low >> bm;
	25
	26	w.s.low = (unsigned int) uu.s.low << b;
	27	w.s.high = ((unsigned int) uu.s.high << b) \| carries;
	28	}
	29
	30	return w.ll;
	31	}
	32	EXPORT_SYMBOL(__ashldi3);