| Sergei Poselenov | b448962 | 2007-07-05 08:17:37 +0200 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2007 |
| 3 | * Wolfgang Denk, DENX Software Engineering, wd@denx.de. |
| 4 | * |
| 5 | * See file CREDITS for list of people who contributed to this |
| 6 | * project. |
| 7 | * |
| 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. |
| 12 | * |
| 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. |
| 17 | * |
| 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, |
| 21 | * MA 02111-1307 USA |
| 22 | */ |
| 23 | /* |
| 24 | * This file is originally a part of the GCC testsuite. |
| 25 | * Check that certain subnormal numbers (formerly known as denormalized |
| 26 | * numbers) are rounded to within 0.5 ulp. PR other/14354. |
| 27 | */ |
| 28 | |
| 29 | #include <common.h> |
| 30 | |
| 31 | #ifdef CONFIG_POST |
| 32 | |
| 33 | #include <post.h> |
| 34 | |
| 35 | #if CONFIG_POST & CFG_POST_FPU |
| 36 | |
| 37 | union uf |
| 38 | { |
| 39 | unsigned int u; |
| 40 | float f; |
| 41 | }; |
| 42 | |
| 43 | static float |
| 44 | u2f (unsigned int v) |
| 45 | { |
| 46 | union uf u; |
| 47 | u.u = v; |
| 48 | return u.f; |
| 49 | } |
| 50 | |
| 51 | static unsigned int |
| 52 | f2u (float v) |
| 53 | { |
| 54 | union uf u; |
| 55 | u.f = v; |
| 56 | return u.u; |
| 57 | } |
| 58 | |
| 59 | static int ok = 1; |
| 60 | |
| 61 | static void |
| 62 | tstmul (unsigned int ux, unsigned int uy, unsigned int ur) |
| 63 | { |
| 64 | float x = u2f (ux); |
| 65 | float y = u2f (uy); |
| 66 | |
| 67 | if (f2u (x * y) != ur) |
| 68 | /* Set a variable rather than aborting here, to simplify tracing when |
| 69 | several computations are wrong. */ |
| 70 | ok = 0; |
| 71 | } |
| 72 | |
| 73 | /* We don't want to make this const and static, or else we risk inlining |
| 74 | causing the test to fold as constants at compile-time. */ |
| 75 | struct |
| 76 | { |
| 77 | unsigned int p1, p2, res; |
| 78 | } static volatile expected[] = |
| 79 | { |
| 80 | {0xfff, 0x3f800400, 0xfff}, |
| 81 | {0xf, 0x3fc88888, 0x17}, |
| 82 | {0xf, 0x3f844444, 0xf} |
| 83 | }; |
| 84 | |
| 85 | int fpu_post_test_math7 (void) |
| 86 | { |
| 87 | unsigned int i; |
| 88 | |
| 89 | for (i = 0; i < sizeof (expected) / sizeof (expected[0]); i++) |
| 90 | { |
| 91 | tstmul (expected[i].p1, expected[i].p2, expected[i].res); |
| 92 | tstmul (expected[i].p2, expected[i].p1, expected[i].res); |
| 93 | } |
| 94 | |
| 95 | if (!ok) { |
| 96 | post_log ("Error in FPU math7 test\n"); |
| 97 | return -1; |
| 98 | } |
| 99 | return 0; |
| 100 | } |
| 101 | |
| 102 | #endif /* CONFIG_POST & CFG_POST_FPU */ |
| 103 | #endif /* CONFIG_POST */ |