[mirror_ubuntu-bionic-kernel.git] / arch / h8300 / lib / ashrdi3.c

#include "libgcc.h"

DWtype __ashrdi3(DWtype u, word_type b)
{
	const DWunion uu = {.ll = u};
	const word_type bm = (sizeof (Wtype) * BITS_PER_UNIT) - b;
	DWunion w;

	if (b == 0)
		return u;

	if (bm <= 0) {
		/* w.s.high = 1..1 or 0..0 */
		w.s.high = uu.s.high >> (sizeof (Wtype) * BITS_PER_UNIT - 1);
		w.s.low = uu.s.high >> -bm;
	} else {
		const UWtype carries = (UWtype) uu.s.high << bm;

		w.s.high = uu.s.high >> b;
		w.s.low = ((UWtype) uu.s.low >> b) | carries;
	}

	return w.ll;
}
Commit	Line	Data
a71a29de YS	1	#include "libgcc.h"
	2
	3	DWtype __ashrdi3(DWtype u, word_type b)
	4	{
	5	const DWunion uu = {.ll = u};
	6	const word_type bm = (sizeof (Wtype) * BITS_PER_UNIT) - b;
	7	DWunion w;
	8
	9	if (b == 0)
	10	return u;
	11
	12	if (bm <= 0) {
	13	/* w.s.high = 1..1 or 0..0 */
	14	w.s.high = uu.s.high >> (sizeof (Wtype) * BITS_PER_UNIT - 1);
	15	w.s.low = uu.s.high >> -bm;
	16	} else {
	17	const UWtype carries = (UWtype) uu.s.high << bm;
	18
	19	w.s.high = uu.s.high >> b;
	20	w.s.low = ((UWtype) uu.s.low >> b) \| carries;
	21	}
	22
	23	return w.ll;
	24	}