]>
git.ipfire.org Git - people/ms/u-boot.git/blob - post/lib_powerpc/complex.c
3 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
5 * See file CREDITS for list of people who contributed to this
8 * This program is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU General Public License as
10 * published by the Free Software Foundation; either version 2 of
11 * the License, or (at your option) any later version.
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
28 * Complex calculations
30 * The calculations in this test are just a combination of simpler
31 * calculations, but probably under different timing conditions, etc.
37 #if CONFIG_POST & CONFIG_SYS_POST_CPU
39 extern int cpu_post_complex_1_asm (int a1
, int a2
, int a3
, int a4
, int n
);
40 extern int cpu_post_complex_2_asm (int x
, int n
);
44 * SUM (a1 * a2 - a3) / a4 = n * result
47 static int cpu_post_test_complex_1 (void)
54 int result
= 6720; /* (a1 * a2 - a3) / a4 */
56 if (cpu_post_complex_1_asm(a1
, a2
, a3
, a4
, n
) != n
* result
)
64 /* (1 + x + x^2 + ... + x^n) * (1 - x) = 1 - x^(n+1)
66 static int cpu_post_test_complex_2 (void)
75 for (x
= -8; x
<= 8; x
++)
79 left
= cpu_post_complex_2_asm(x
, n
);
83 for (k
= 0; k
<= n
; k
++)
101 int cpu_post_test_complex (void)
104 int flag
= disable_interrupts();
108 ret
= cpu_post_test_complex_1();
113 ret
= cpu_post_test_complex_2();
118 post_log ("Error at complex test !\n");