/* * 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 #ifdef CONFIG_POST #include #if CONFIG_POST & CFG_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 < sizeof (expected) / sizeof (expected[0]); 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 & CFG_POST_FPU */ #endif /* CONFIG_POST */
