3724fb15fa
Eliminate the VSZ constant that defined the Wavefront size (in numbers of work items); replaced it with a parameter in the GPU.py configuration script. Changed all data structures dependent on the Wavefront size to be dynamically sized. Legal values of Wavefront size are 16, 32, 64 for now and checked at initialization time.
149 lines
4.2 KiB
C++
149 lines
4.2 KiB
C++
/*
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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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#include <limits>
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#include <memory>
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#include "base/misc.hh"
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class GPUDynInst;
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typedef std::bitset<std::numeric_limits<unsigned long long>::digits> VectorMask;
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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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