src/gallium/drivers/r600/sfn/sfn_shader_compute.cpp

   1 /* -*- mesa-c++  -*-
   2  *
   3  * Copyright (c) 2018 Collabora LTD
   4  *
   5  * Author: Gert Wollny <gert.wollny@collabora.com>
   6  *
   7  * Permission is hereby granted, free of charge, to any person obtaining a
   8  * copy of this software and associated documentation files (the "Software"),
   9  * to deal in the Software without restriction, including without limitation
  10  * on the rights to use, copy, modify, merge, publish, distribute, sub
  11  * license, and/or sell copies of the Software, and to permit persons to whom
  12  * the Software is furnished to do so, subject to the following conditions:
  13  *
  14  * The above copyright notice and this permission notice (including the next
  15  * paragraph) shall be included in all copies or substantial portions of the
  16  * Software.
  17  *
  18  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  19  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  20  * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
  21  * THE AUTHOR(S) AND/OR THEIR SUPPLIERS BE LIABLE FOR ANY CLAIM,
  22  * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
  23  * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
  24  * USE OR OTHER DEALINGS IN THE SOFTWARE.
  25  */
  26
  27 #include "sfn_shader_compute.h"
  28 #include "sfn_instruction_fetch.h"
  29
  30 namespace r600 {
  31
  32 ComputeShaderFromNir::ComputeShaderFromNir(r600_pipe_shader *sh,
  33                                            r600_pipe_shader_selector& sel,
  34                                            UNUSED const r600_shader_key& key):
  35      ShaderFromNirProcessor (PIPE_SHADER_COMPUTE, sel, sh->shader,
  36                              sh->scratch_space_needed),
  37      m_reserved_registers(0)
  38 {
  39 }
  40
  41 bool ComputeShaderFromNir::scan_sysvalue_access(UNUSED nir_instr *instr)
  42 {
  43    return true;
  44 }
  45 bool ComputeShaderFromNir::allocate_reserved_registers()
  46 {
  47    int thread_id_sel = m_reserved_registers++;
  48    int wg_id_sel = m_reserved_registers++;
  49
  50    for (int i = 0; i < 3; ++i) {
  51       auto tmp = new GPRValue(thread_id_sel, i);
  52       tmp->set_as_input();
  53       m_local_invocation_id[i] = PValue(tmp);
  54       inject_register(tmp->sel(), i, m_local_invocation_id[i], false);
  55
  56       tmp = new GPRValue(wg_id_sel, i);
  57       tmp->set_as_input();
  58       m_workgroup_id[i] = PValue(tmp);
  59       inject_register(tmp->sel(), i, m_workgroup_id[i], false);
  60    }
  61    return true;
  62 }
  63
  64 bool ComputeShaderFromNir::emit_intrinsic_instruction_override(nir_intrinsic_instr* instr)
  65 {
  66    switch (instr->intrinsic) {
  67    case nir_intrinsic_load_local_invocation_id:
  68       return emit_load_3vec(instr, m_local_invocation_id);
  69    case nir_intrinsic_load_work_group_id:
  70       return emit_load_3vec(instr, m_workgroup_id);
  71    case nir_intrinsic_load_num_work_groups:
  72       return emit_load_num_work_groups(instr);
  73    default:
  74       return false;
  75    }
  76 }
  77
  78 bool ComputeShaderFromNir::emit_load_3vec(nir_intrinsic_instr* instr,
  79                                           const std::array<PValue,3>& src)
  80 {
  81    AluInstruction *ir = nullptr;
  82    for (int i = 0; i < 3; ++i) {
  83       ir = new AluInstruction(op1_mov, from_nir(instr->dest, i), src[i], {alu_write});
  84       emit_instruction(ir);
  85    }
  86    ir->set_flag(alu_last_instr);
  87    return true;
  88 }
  89
  90 bool ComputeShaderFromNir::emit_load_num_work_groups(nir_intrinsic_instr* instr)
  91 {
  92    int temp = allocate_temp_register();
  93    PValue a_zero(new GPRValue(temp, 1));
  94    emit_instruction(new AluInstruction(op1_mov, a_zero, Value::zero, EmitInstruction::last_write));
  95    GPRVector dest;
  96    for (int i = 0; i < 3; ++i)
  97       dest.set_reg_i(i, from_nir(instr->dest, i));
  98    dest.set_reg_i(3, from_nir(instr->dest, 7));
  99
 100    auto ir = new FetchInstruction(vc_fetch, no_index_offset,
 101                                   fmt_32_32_32_32, vtx_nf_int, vtx_es_none, a_zero, dest, 16,
 102                                   false, 16, R600_BUFFER_INFO_CONST_BUFFER, 0,
 103                                   bim_none, false, false, 0, 0, 0, PValue(), {0,1,2,7});
 104    ir->set_flag(vtx_srf_mode);
 105    emit_instruction(ir);
 106    return true;
 107 }
 108
 109 bool ComputeShaderFromNir::do_process_inputs(UNUSED nir_variable *input)
 110 {
 111    return true;
 112 }
 113
 114 bool ComputeShaderFromNir::do_process_outputs(UNUSED nir_variable *output)
 115 {
 116    return true;
 117 }
 118
 119 bool ComputeShaderFromNir::do_emit_load_deref(UNUSED const nir_variable *in_var,
 120                                               UNUSED nir_intrinsic_instr* instr)
 121 {
 122    return true;
 123 }
 124
 125 bool ComputeShaderFromNir::do_emit_store_deref(UNUSED const nir_variable *out_var,
 126                                                UNUSED nir_intrinsic_instr* instr)
 127 {
 128    return true;
 129 }
 130 void ComputeShaderFromNir::do_finalize()
 131 {
 132
 133 }
 134
 135 }