mirror of
https://source.denx.de/u-boot/u-boot.git
synced 2025-11-03 18:01:41 +01:00
128 lines
2.4 KiB
C
128 lines
2.4 KiB
C
/*
|
|
* (C) Copyright 2002
|
|
* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
|
|
*
|
|
* See file CREDITS for list of people who contributed to this
|
|
* project.
|
|
*
|
|
* This program is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU General Public License as
|
|
* published by the Free Software Foundation; either version 2 of
|
|
* the License, or (at your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; if not, write to the Free Software
|
|
* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
|
|
* MA 02111-1307 USA
|
|
*/
|
|
|
|
#include <common.h>
|
|
|
|
/*
|
|
* CPU test
|
|
* Complex calculations
|
|
*
|
|
* The calculations in this test are just a combination of simpler
|
|
* calculations, but probably under different timing conditions, etc.
|
|
*/
|
|
|
|
#include <post.h>
|
|
#include "cpu_asm.h"
|
|
|
|
#if CONFIG_POST & CONFIG_SYS_POST_CPU
|
|
|
|
extern int cpu_post_complex_1_asm (int a1, int a2, int a3, int a4, int n);
|
|
extern int cpu_post_complex_2_asm (int x, int n);
|
|
|
|
/*
|
|
* n
|
|
* SUM (a1 * a2 - a3) / a4 = n * result
|
|
* i=1
|
|
*/
|
|
static int cpu_post_test_complex_1 (void)
|
|
{
|
|
int a1 = 666;
|
|
int a2 = 667;
|
|
int a3 = 668;
|
|
int a4 = 66;
|
|
int n = 100;
|
|
int result = 6720; /* (a1 * a2 - a3) / a4 */
|
|
|
|
if (cpu_post_complex_1_asm(a1, a2, a3, a4, n) != n * result)
|
|
{
|
|
return -1;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* (1 + x + x^2 + ... + x^n) * (1 - x) = 1 - x^(n+1)
|
|
*/
|
|
static int cpu_post_test_complex_2 (void)
|
|
{
|
|
int ret = -1;
|
|
int x;
|
|
int n;
|
|
int k;
|
|
int left;
|
|
int right;
|
|
|
|
for (x = -8; x <= 8; x ++)
|
|
{
|
|
n = 9;
|
|
|
|
left = cpu_post_complex_2_asm(x, n);
|
|
left *= 1 - x;
|
|
|
|
right = 1;
|
|
for (k = 0; k <= n; k ++)
|
|
{
|
|
right *= x;
|
|
}
|
|
right = 1 - right;
|
|
|
|
if (left != right)
|
|
{
|
|
goto Done;
|
|
}
|
|
}
|
|
|
|
ret = 0;
|
|
Done:
|
|
|
|
return ret;
|
|
}
|
|
|
|
int cpu_post_test_complex (void)
|
|
{
|
|
int ret = 0;
|
|
int flag = disable_interrupts();
|
|
|
|
if (ret == 0)
|
|
{
|
|
ret = cpu_post_test_complex_1();
|
|
}
|
|
|
|
if (ret == 0)
|
|
{
|
|
ret = cpu_post_test_complex_2();
|
|
}
|
|
|
|
if (ret != 0)
|
|
{
|
|
post_log ("Error at complex test !\n");
|
|
}
|
|
|
|
if (flag)
|
|
enable_interrupts();
|
|
|
|
return ret;
|
|
}
|
|
|
|
#endif
|