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
44class ComputeUnit;
45class GPUStaticInst;
46class Shader;
47class Wavefront;
48
49// Condition Register State (used only when executing HSAIL)
50class 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
102