/* * (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 /* * CPU test * Complex calculations * * The calculations in this test are just a combination of simpler * calculations, but probably under different timing conditions, etc. */ #include #include "cpu_asm.h" #if CONFIG_POST & CFG_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; 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"); } return ret; } #endif