11dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project/*- 21dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * Copyright (c) 2003, Steven G. Kargl 31dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * All rights reserved. 41dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * 51dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * Redistribution and use in source and binary forms, with or without 61dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * modification, are permitted provided that the following conditions 71dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * are met: 81dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * 1. Redistributions of source code must retain the above copyright 91dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * notice unmodified, this list of conditions, and the following 101dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * disclaimer. 111dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * 2. Redistributions in binary form must reproduce the above copyright 121dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * notice, this list of conditions and the following disclaimer in the 131dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * documentation and/or other materials provided with the distribution. 141dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * 151dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 161dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 171dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 181dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 191dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 201dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 211dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 221dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 231dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 241dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 251dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project */ 261dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project 271dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project#include <sys/cdefs.h> 28a0ee07829a9ba7e99ef68e8c12551301cc797f0fElliott Hughes__FBSDID("$FreeBSD$"); 291dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project 3014538ca75ef3d0edc8fb86e332d79a4913238cb6Elliott Hughes#include "math.h" 3114538ca75ef3d0edc8fb86e332d79a4913238cb6Elliott Hughes#include "math_private.h" 321dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project 331dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Projectfloat 341dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Projectroundf(float x) 351dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project{ 361dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project float t; 3714538ca75ef3d0edc8fb86e332d79a4913238cb6Elliott Hughes uint32_t hx; 381dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project 3914538ca75ef3d0edc8fb86e332d79a4913238cb6Elliott Hughes GET_FLOAT_WORD(hx, x); 4014538ca75ef3d0edc8fb86e332d79a4913238cb6Elliott Hughes if ((hx & 0x7fffffff) == 0x7f800000) 4114538ca75ef3d0edc8fb86e332d79a4913238cb6Elliott Hughes return (x + x); 421dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project 4314538ca75ef3d0edc8fb86e332d79a4913238cb6Elliott Hughes if (!(hx & 0x80000000)) { 441dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project t = floorf(x); 4514538ca75ef3d0edc8fb86e332d79a4913238cb6Elliott Hughes if (t - x <= -0.5F) 4614538ca75ef3d0edc8fb86e332d79a4913238cb6Elliott Hughes t += 1; 471dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project return (t); 481dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project } else { 491dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project t = floorf(-x); 5014538ca75ef3d0edc8fb86e332d79a4913238cb6Elliott Hughes if (t + x <= -0.5F) 5114538ca75ef3d0edc8fb86e332d79a4913238cb6Elliott Hughes t += 1; 521dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project return (-t); 531dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project } 541dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project} 55