misc.hh revision 11534:7106f550afad
1/* 2 * Copyright (c) 2011-2015 Advanced Micro Devices, Inc. 3 * All rights reserved. 4 * 5 * For use for simulation and test purposes only 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions are met: 9 * 10 * 1. Redistributions of source code must retain the above copyright notice, 11 * this list of conditions and the following disclaimer. 12 * 13 * 2. Redistributions in binary form must reproduce the above copyright notice, 14 * this list of conditions and the following disclaimer in the documentation 15 * and/or other materials provided with the distribution. 16 * 17 * 3. Neither the name of the copyright holder nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 22 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE 25 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 26 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 27 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 28 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 29 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 30 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 31 * POSSIBILITY OF SUCH DAMAGE. 32 * 33 * Author: Steve Reinhardt 34 */ 35 36#ifndef __MISC_HH__ 37#define __MISC_HH__ 38 39#include <bitset> 40#include <limits> 41#include <memory> 42 43#include "base/misc.hh" 44 45class GPUDynInst; 46 47typedef std::bitset<std::numeric_limits<unsigned long long>::digits> VectorMask; 48typedef std::shared_ptr<GPUDynInst> GPUDynInstPtr; 49 50class WaitClass 51{ 52 public: 53 WaitClass() : nxtAvail(0), lookAheadAvail(0), tcnt(0) { } 54 void init(uint64_t *_tcnt, uint32_t _numStages=0) 55 { 56 tcnt = _tcnt; 57 numStages = _numStages; 58 } 59 60 void set(uint32_t i) 61 { 62 fatal_if(nxtAvail > *tcnt, 63 "Can't allocate resource because it is busy!!!"); 64 nxtAvail = *tcnt + i; 65 } 66 void preset(uint32_t delay) 67 { 68 lookAheadAvail = std::max(lookAheadAvail, delay + (*tcnt) - numStages); 69 } 70 bool rdy() const { return *tcnt >= nxtAvail; } 71 bool prerdy() const { return *tcnt >= lookAheadAvail; } 72 73 private: 74 // timestamp indicating when resource will be available 75 uint64_t nxtAvail; 76 // timestamp indicating when resource will be available including 77 // pending uses of the resource (when there is a cycle gap between 78 // rdy() and set() 79 uint64_t lookAheadAvail; 80 // current timestamp 81 uint64_t *tcnt; 82 // number of stages between checking if a resource is ready and 83 // setting the resource's utilization 84 uint32_t numStages; 85}; 86 87class Float16 88{ 89 public: 90 uint16_t val; 91 92 Float16() { val = 0; } 93 94 Float16(const Float16 &x) : val(x.val) { } 95 96 Float16(float x) 97 { 98 uint32_t ai = *(uint32_t *)&x; 99 100 uint32_t s = (ai >> 31) & 0x1; 101 uint32_t exp = (ai >> 23) & 0xff; 102 uint32_t mant = (ai >> 0) & 0x7fffff; 103 104 if (exp == 0 || exp <= 0x70) { 105 exp = 0; 106 mant = 0; 107 } else if (exp == 0xff) { 108 exp = 0x1f; 109 } else if (exp >= 0x8f) { 110 exp = 0x1f; 111 mant = 0; 112 } else { 113 exp = exp - 0x7f + 0x0f; 114 } 115 116 mant = mant >> 13; 117 118 val = 0; 119 val |= (s << 15); 120 val |= (exp << 10); 121 val |= (mant << 0); 122 } 123 124 operator float() const 125 { 126 uint32_t s = (val >> 15) & 0x1; 127 uint32_t exp = (val >> 10) & 0x1f; 128 uint32_t mant = (val >> 0) & 0x3ff; 129 130 if (!exp) { 131 exp = 0; 132 mant = 0; 133 } else if (exp == 0x1f) { 134 exp = 0xff; 135 } else { 136 exp = exp - 0x0f + 0x7f; 137 } 138 139 uint32_t val1 = 0; 140 val1 |= (s << 31); 141 val1 |= (exp << 23); 142 val1 |= (mant << 13); 143 144 return *(float*)&val1; 145 } 146}; 147 148#endif // __MISC_HH__ 149