1 /* 2 * Copyright (c) 2014, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 */ 23 24 package jdk.testlibrary; 25 26 /** 27 * Common library for additional constants of the <code>Float</code> type. 28 */ 29 public final class FloatUtils { 30 31 /** 32 * Bias used in representing a <code>Float</code> exponent. 33 */ 34 public static final int EXP_BIAS = 127; 35 36 /** 37 * Bit mask to isolate the exponent field of a 38 * <code>Float</code>. 39 */ 40 public static final int EXP_BIT_MASK = 0x7F800000; 41 42 /** 43 * Bit mask to isolate the sign bit of a <code>Float</code>. 44 */ 45 public static final int SIGN_BIT_MASK = 0x80000000; 46 47 /** 48 * Bit mask to isolate the significand field of a 49 * <code>Float</code>. 50 */ 51 public static final int SIGNIF_BIT_MASK = 0x007FFFFF; 52 53 /** 54 * The number of logical bits in the significand of a 55 * <code>Float</code> number, including the implicit bit. 56 */ 57 public static final int SIGNIFICAND_WIDTH = 24; 58 59 /** 60 * The exponent the smallest positive <code>Float</code> subnormal 61 * value would have if it could be normalized. 62 */ 63 public static final int MIN_SUB_EXPONENT = Float.MIN_EXPONENT - 64 (SIGNIFICAND_WIDTH - 1); 65 66 }