| /* |
| * Copyright (C) 2007 |
| * 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 |
| */ |
| /* |
| * This file is originally a part of the GCC testsuite. |
| * Check that certain subnormal numbers (formerly known as denormalized |
| * numbers) are rounded to within 0.5 ulp. PR other/14354. |
| */ |
| |
| #include <common.h> |
| |
| #include <post.h> |
| |
| GNU_FPOST_ATTR |
| |
| #if CONFIG_POST & CONFIG_SYS_POST_FPU |
| |
| union uf |
| { |
| unsigned int u; |
| float f; |
| }; |
| |
| static float |
| u2f (unsigned int v) |
| { |
| union uf u; |
| u.u = v; |
| return u.f; |
| } |
| |
| static unsigned int |
| f2u (float v) |
| { |
| union uf u; |
| u.f = v; |
| return u.u; |
| } |
| |
| static int ok = 1; |
| |
| static void |
| tstmul (unsigned int ux, unsigned int uy, unsigned int ur) |
| { |
| float x = u2f (ux); |
| float y = u2f (uy); |
| |
| if (f2u (x * y) != ur) |
| /* Set a variable rather than aborting here, to simplify tracing when |
| several computations are wrong. */ |
| ok = 0; |
| } |
| |
| /* We don't want to make this const and static, or else we risk inlining |
| causing the test to fold as constants at compile-time. */ |
| struct |
| { |
| unsigned int p1, p2, res; |
| } static volatile expected[] = |
| { |
| {0xfff, 0x3f800400, 0xfff}, |
| {0xf, 0x3fc88888, 0x17}, |
| {0xf, 0x3f844444, 0xf} |
| }; |
| |
| int fpu_post_test_math7 (void) |
| { |
| unsigned int i; |
| |
| for (i = 0; i < ARRAY_SIZE(expected); i++) |
| { |
| tstmul (expected[i].p1, expected[i].p2, expected[i].res); |
| tstmul (expected[i].p2, expected[i].p1, expected[i].res); |
| } |
| |
| if (!ok) { |
| post_log ("Error in FPU math7 test\n"); |
| return -1; |
| } |
| return 0; |
| } |
| |
| #endif /* CONFIG_POST & CONFIG_SYS_POST_FPU */ |