Commit a71a29de authored by Yoshinori Sato's avatar Yoshinori Sato
Browse files

h8300: library functions 



Signed-off-by: default avatarYoshinori Sato <ysato@users.sourceforge.jp>
parent bbeb79ac

arch/h8300/lib/Makefile

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#

# Makefile for H8/300-specific library files..

#



lib-y  = memcpy.o memset.o abs.o strncpy.o \

	 mulsi3.o udivsi3.o muldi3.o moddivsi3.o \

	 ashldi3.o lshrdi3.o ashrdi3.o ucmpdi2.o \

	 delay.o

arch/h8300/lib/abs.S

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;;; abs.S



#include <asm/linkage.h>



#if defined(CONFIG_CPU_H8300H)

	.h8300h

#endif

#if defined(CONFIG_CPU_H8S)

	.h8300s

#endif

	.text

.global _abs



;;; int abs(int n)

_abs:

	mov.l	er0,er0

	bpl	1f

	neg.l	er0

1:

	rts

arch/h8300/lib/ashldi3.c

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#include "libgcc.h"



DWtype

__ashldi3(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.low = 0;

		w.s.high = (UWtype) uu.s.low << -bm;

	} else {

		const UWtype carries = (UWtype) uu.s.low >> bm;



		w.s.low = (UWtype) uu.s.low << b;

		w.s.high = ((UWtype) uu.s.high << b) | carries;

	}



	return w.ll;

}

arch/h8300/lib/ashrdi3.c

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#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;

}

arch/h8300/lib/delay.c

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/*

 * delay loops

 *

 * Copyright (C) 2015 Yoshinori Sato

 */



#include <linux/module.h>

#include <linux/delay.h>

#include <asm/param.h>

#include <asm/processor.h>

#include <asm/timex.h>



void __delay(unsigned long cycles)

{

	__asm__ volatile ("1: dec.l #1,%0\n\t"

			  "bne 1b":"=r"(cycles):"0"(cycles));

}

EXPORT_SYMBOL(__delay);



void __const_udelay(unsigned long xloops)

{

	u64 loops;



	loops = (u64)xloops * loops_per_jiffy * HZ;



	__delay(loops >> 32);

}

EXPORT_SYMBOL(__const_udelay);



void __udelay(unsigned long usecs)

{

	__const_udelay(usecs * 0x10C7UL); /* 2**32 / 1000000 (rounded up) */

}

EXPORT_SYMBOL(__udelay);



void __ndelay(unsigned long nsecs)

{

	__const_udelay(nsecs * 0x5UL); /* 2**32 / 1000000000 (rounded up) */

}

EXPORT_SYMBOL(__ndelay);