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

/*
 * Copyright 2004-2009 Analog Devices Inc.
 *
 * Licensed under the GPL-2 or later.
 */

#include "gcclib.h"

#ifdef CONFIG_ARITHMETIC_OPS_L1
DItype __ashrdi3(DItype u, word_type b)__attribute__((l1_text));
#endif

DItype __ashrdi3(DItype u, word_type b)
{
	DIunion w;
	word_type bm;
	DIunion uu;

	if (b == 0)
		return u;

	uu.ll = u;

	bm = (sizeof(SItype) * BITS_PER_UNIT) - b;
	if (bm <= 0) {
		/* w.s.high = 1..1 or 0..0 */
		w.s.high = uu.s.high >> (sizeof(SItype) * BITS_PER_UNIT - 1);
		w.s.low = uu.s.high >> -bm;
	} else {
		USItype carries = (USItype) uu.s.high << bm;
		w.s.high = uu.s.high >> b;
		w.s.low = ((USItype) uu.s.low >> b) | carries;
	}

	return w.ll;
}
Commit	Line	Data
1394f032	1	/*
96f1050d	2	* Copyright 2004-2009 Analog Devices Inc.
1394f032	3	*
96f1050d	4	* Licensed under the GPL-2 or later.
1394f032 BW	5	*/
	6
	7	#include "gcclib.h"
	8
	9	#ifdef CONFIG_ARITHMETIC_OPS_L1
	10	DItype __ashrdi3(DItype u, word_type b)__attribute__((l1_text));
	11	#endif
	12
	13	DItype __ashrdi3(DItype u, word_type b)
	14	{
	15	DIunion w;
	16	word_type bm;
	17	DIunion uu;
	18
	19	if (b == 0)
	20	return u;
	21
	22	uu.ll = u;
	23
	24	bm = (sizeof(SItype) * BITS_PER_UNIT) - b;
	25	if (bm <= 0) {
	26	/* w.s.high = 1..1 or 0..0 */
	27	w.s.high = uu.s.high >> (sizeof(SItype) * BITS_PER_UNIT - 1);
	28	w.s.low = uu.s.high >> -bm;
	29	} else {
	30	USItype carries = (USItype) uu.s.high << bm;
	31	w.s.high = uu.s.high >> b;
	32	w.s.low = ((USItype) uu.s.low >> b) \| carries;
	33	}
	34
	35	return w.ll;
	36	}