1 /* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License (the "License"). 6 * You may not use this file except in compliance with the License. 7 * 8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9 * or http://www.opensolaris.org/os/licensing. 10 * See the License for the specific language governing permissions 11 * and limitations under the License. 12 * 13 * When distributing Covered Code, include this CDDL HEADER in each 14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15 * If applicable, add the following below this CDDL HEADER, with the 16 * fields enclosed by brackets "[]" replaced with your own identifying 17 * information: Portions Copyright [yyyy] [name of copyright owner] 18 * 19 * CDDL HEADER END 20 */ 21 22 /* 23 * Copyright 2011 Nexenta Systems, Inc. All rights reserved. 24 */ 25 /* 26 * Copyright 2006 Sun Microsystems, Inc. All rights reserved. 27 * Use is subject to license terms. 28 */ 29 30 #pragma weak fdimf = __fdimf 31 32 #include "libm.h" /* for islessequal macro */ 33 34 float 35 __fdimf(float x, float y) { 36 /* 37 * On SPARC v8plus/v9, this could be implemented as follows 38 * (assuming %f0 = x, %f1 = y, return value left in %f0): 39 * 40 * fcmps %fcc0,%f0,%f1 41 * st %g0,[scratch] ! use fzero instead of st/ld 42 * ld [scratch],%f2 ! if VIS is available 43 * fnegs %f2,%f3 44 * fmovsle %fcc0,%f2,%f0 45 * fmovsle %fcc0,%f3,%f1 46 * fsubs %f0,%f1,%f0 47 */ 48 if (islessequal(x, y)) { 49 x = 0.0f; 50 y = -x; 51 } 52 return (x - y); 53 } 54