2016-01-19 20:28:22 +01:00
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/*
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* Copyright (c) 2011-2015 Advanced Micro Devices, Inc.
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* All rights reserved.
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*
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* For use for simulation and test purposes only
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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*
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* 3. Neither the name of the copyright holder nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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* Author: Steve Reinhardt
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*/
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#ifndef __MISC_HH__
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#define __MISC_HH__
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#include <bitset>
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2016-06-09 17:24:55 +02:00
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#include <limits>
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2016-01-19 20:28:22 +01:00
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#include <memory>
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#include "base/misc.hh"
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class GPUDynInst;
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2016-06-09 17:24:55 +02:00
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typedef std::bitset<std::numeric_limits<unsigned long long>::digits> VectorMask;
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2016-01-19 20:28:22 +01:00
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typedef std::shared_ptr<GPUDynInst> GPUDynInstPtr;
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class WaitClass
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{
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public:
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WaitClass() : nxtAvail(0), lookAheadAvail(0), tcnt(0) { }
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void init(uint64_t *_tcnt, uint32_t _numStages=0)
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{
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tcnt = _tcnt;
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numStages = _numStages;
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}
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void set(uint32_t i)
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{
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fatal_if(nxtAvail > *tcnt,
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"Can't allocate resource because it is busy!!!");
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nxtAvail = *tcnt + i;
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}
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void preset(uint32_t delay)
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{
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lookAheadAvail = std::max(lookAheadAvail, delay + (*tcnt) - numStages);
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}
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bool rdy() const { return *tcnt >= nxtAvail; }
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bool prerdy() const { return *tcnt >= lookAheadAvail; }
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private:
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// timestamp indicating when resource will be available
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uint64_t nxtAvail;
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// timestamp indicating when resource will be available including
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// pending uses of the resource (when there is a cycle gap between
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// rdy() and set()
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uint64_t lookAheadAvail;
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// current timestamp
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uint64_t *tcnt;
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// number of stages between checking if a resource is ready and
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// setting the resource's utilization
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uint32_t numStages;
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};
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class Float16
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{
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public:
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uint16_t val;
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Float16() { val = 0; }
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Float16(const Float16 &x) : val(x.val) { }
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Float16(float x)
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{
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uint32_t ai = *(uint32_t *)&x;
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uint32_t s = (ai >> 31) & 0x1;
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uint32_t exp = (ai >> 23) & 0xff;
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uint32_t mant = (ai >> 0) & 0x7fffff;
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if (exp == 0 || exp <= 0x70) {
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exp = 0;
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mant = 0;
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} else if (exp == 0xff) {
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exp = 0x1f;
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} else if (exp >= 0x8f) {
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exp = 0x1f;
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mant = 0;
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} else {
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exp = exp - 0x7f + 0x0f;
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}
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mant = mant >> 13;
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val = 0;
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val |= (s << 15);
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val |= (exp << 10);
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val |= (mant << 0);
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}
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operator float() const
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{
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uint32_t s = (val >> 15) & 0x1;
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uint32_t exp = (val >> 10) & 0x1f;
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uint32_t mant = (val >> 0) & 0x3ff;
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if (!exp) {
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exp = 0;
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mant = 0;
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} else if (exp == 0x1f) {
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exp = 0xff;
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} else {
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exp = exp - 0x0f + 0x7f;
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}
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uint32_t val1 = 0;
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val1 |= (s << 31);
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val1 |= (exp << 23);
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val1 |= (mant << 13);
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return *(float*)&val1;
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}
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};
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#endif // __MISC_HH__
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