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/*

 * Copyright (C) 2005 Jakub Vana

 * Copyright (C) 2005 Jakub Jermar

 * All rights reserved.

 *

 * Redistribution and use in source and binary forms, with or without

 * modification, are permitted provided that the following conditions

 * are met:

 *

 * - Redistributions of source code must retain the above copyright

 *   notice, this list of conditions and the following disclaimer.

 * - Redistributions in binary form must reproduce the above copyright

 *   notice, this list of conditions and the following disclaimer in the

 *   documentation and/or other materials provided with the distribution.

 * - The name of the author may not be used to endorse or promote products

 *   derived from this software without specific prior written permission.

 *

 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR

 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES

 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.

 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,

 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT

 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,

 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY

 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT

 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF

 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

 */

#include <print.h>

#include <debug.h>

#include <panic.h>

#include <test.h>

#include <atomic.h>

#include <proc/thread.h>

#include <arch.h>

#include <arch/arch.h>

#define THREADS		150*2

#define ATTEMPTS	100

#define E_10e8	271828182

#define PI_10e8	314159265

#ifdef __ia32_ARCH_H__

static inline double sqrt(double x) { double v; __asm__ ("fsqrt\n" : "=t" (v) : "0" (x)); return v; }

#endif

#ifdef __amd64_ARCH_H__

static inline double sqrt(double x) { double v; __asm__ ("fsqrt\n" : "=t" (v) : "0" (x)); return v; }

#endif

#ifdef __ia64_ARCH_H__

static inline long double sqrt(long double a) 

{   

	long double x =	1;

	long double lx = 0;

	if(a<0.00000000000000001) return 0;

	while(x!=lx)

	{

		lx=x;

		x=(x+(a/x))/2;

	}

	return x; 

}

#endif

static atomic_t threads_ok;

static waitq_t can_start;

static void e(void *data)

{

	int i;

	double e,d,le,f;

	thread_detach(THREAD);

	waitq_sleep(&can_start);

	for (i = 0; i<ATTEMPTS; i++) {

		le=-1;

		e=0;

		f=1;

		for(d=1;e!=le;d*=f,f+=1) {

			le=e;

			e=e+1/d;

		}

		if((int)(100000000*e)!=E_10e8)

			panic("tid%d: e*10e8=%zd should be %zd\n", THREAD->tid, (unative_t) (100000000*e),(unative_t) E_10e8);

	}

	printf("tid%d: e*10e8=%zd should be %zd\n", THREAD->tid, (unative_t) (100000000*e),(unative_t) E_10e8);

	atomic_inc(&threads_ok);

}

static void pi(void *data)

{

#ifdef __ia64_ARCH_H__

#undef PI_10e8	

#define PI_10e8	3141592

#endif

	int i;

	double lpi, pi;

	double n, ab, ad;

	thread_detach(THREAD);

	waitq_sleep(&can_start);

	for (i = 0; i<ATTEMPTS; i++) {

		lpi = -1;

		pi = 0;

		for (n=2, ab = sqrt(2); lpi != pi; n *= 2, ab = ad) {

			double sc, cd;

			sc = sqrt(1 - (ab*ab/4));

			cd = 1 - sc;

			ad = sqrt(ab*ab/4 + cd*cd);

			lpi = pi;

			pi = 2 * n * ad;

		}

#ifdef __ia64_ARCH_H__

		if((int)(1000000*pi)!=PI_10e8)

			panic("tid%d: pi*10e8=%zd should be %zd\n", THREAD->tid, (unative_t) (1000000*pi),(unative_t) (PI_10e8/100));

#else

		if((int)(100000000*pi)!=PI_10e8)

			panic("tid%d: pi*10e8=%zd should be %zd\n", THREAD->tid, (unative_t) (100000000*pi),(unative_t) PI_10e8);

#endif

	}

	printf("tid%d: pi*10e8=%zd should be %zd\n", THREAD->tid, (unative_t) (100000000*pi),(unative_t) PI_10e8);

	atomic_inc(&threads_ok);

}

void test(void)

{

	thread_t *t;

	int i;

	waitq_initialize(&can_start);

	printf("FPU test #1\n");

	printf("Creating %d threads... ", THREADS);

	for (i=0; i<THREADS/2; i++) {  

		if (!(t = thread_create(e, NULL, TASK, 0, "e")))

			panic("could not create thread\n");

		thread_ready(t);

		if (!(t = thread_create(pi, NULL, TASK, 0, "pi")))

			panic("could not create thread\n");

		thread_ready(t);

	}

	printf("ok\n");

	thread_sleep(1);

	waitq_wakeup(&can_start, WAKEUP_ALL);

	while (atomic_get(&threads_ok) != THREADS)

		;

	printf("Test passed.\n");

}