src/gpu-compute/condition_register_state.hh

   1 /*
   2  * Copyright (c) 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: John Kalamatianos
  34  */
  35
  36 #ifndef __CONDITION_REGISTER_STATE_HH__
  37 #define __CONDITION_REGISTER_STATE_HH__
  38
  39 #include <string>
  40 #include <vector>
  41
  42 #include "gpu-compute/misc.hh"
  43
  44 class ComputeUnit;
  45 class GPUStaticInst;
  46 class Shader;
  47 class Wavefront;
  48
  49 // Condition Register State (used only when executing HSAIL)
  50 class ConditionRegisterState
  51 {
  52   public:
  53     ConditionRegisterState();
  54     void init(uint32_t _size);
  55     const std::string name() const { return _name; }
  56     void setParent(ComputeUnit *_computeUnit);
  57     void regStats() { }
  58
  59     template<typename T>
  60     T
  61     read(int regIdx, int threadId)
  62     {
  63         bool tmp = c_reg[regIdx][threadId];
  64         T *p0 = (T*)(&tmp);
  65
  66         return *p0;
  67     }
  68
  69     template<typename T>
  70     void
  71     write(int regIdx, int threadId, T value)
  72     {
  73         c_reg[regIdx][threadId] = (bool)(value & 0x01);
  74     }
  75
  76     void
  77     markReg(int regIdx, uint8_t value)
  78     {
  79         busy.at(regIdx) = value;
  80     }
  81
  82     uint8_t
  83     regBusy(int idx)
  84     {
  85         uint8_t status = busy.at(idx);
  86         return status;
  87     }
  88
  89     int numRegs() { return c_reg.size(); }
  90     void exec(GPUDynInstPtr ii, Wavefront *w);
  91
  92   private:
  93     ComputeUnit* computeUnit;
  94     std::string _name;
  95     // Condition Register state
  96     std::vector<VectorMask> c_reg;
  97     // flag indicating if a register is busy
  98     std::vector<uint8_t> busy;
  99 };
 100
 101 #endif