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Merge pull request #1156 from Lakumakkara/lop3

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gl_shader_decompiler: Implement LOP3
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bunnei 2018-08-23 02:16:49 -04:00 • committed by GitHub
commit 232b0d9d2a
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2 changed files with 60 additions and 0 deletions
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41
src/video_core/renderer_opengl/gl_shader_decompiler.cpp
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@ -849,6 +849,33 @@ private:
}
}
void WriteLop3Instruction(Register dest, const std::string& op_a, const std::string& op_b,
const std::string& op_c, const std::string& imm_lut) {
if (dest == Tegra::Shader::Register::ZeroIndex) {
return;
}
static constexpr std::array<const char*, 32> shift_amounts = {
"0", "1", "2", "3", "4", "5", "6", "7", "8", "9", "10",
"11", "12", "13", "14", "15", "16", "17", "18", "19", "20", "21",
"22", "23", "24", "25", "26", "27", "28", "29", "30", "31"};
std::string result;
result += '(';
for (size_t i = 0; i < shift_amounts.size(); ++i) {
if (i)
result += '|';
result += "(((" + imm_lut + " >> (((" + op_c + " >> " + shift_amounts[i] +
") & 1) | ((" + op_b + " >> " + shift_amounts[i] + ") & 1) << 1 | ((" + op_a +
" >> " + shift_amounts[i] + ") & 1) << 2)) & 1) << " + shift_amounts[i] + ")";
}
result += ')';
regs.SetRegisterToInteger(dest, true, 0, result, 1, 1);
}
void WriteTexsInstruction(const Instruction& instr, const std::string& coord,
const std::string& texture) {
// Add an extra scope and declare the texture coords inside to prevent
@ -1297,6 +1324,20 @@ private:
instr.alu.lop.pred_result_mode, instr.alu.lop.pred48);
break;
}
case OpCode::Id::LOP3_C:
case OpCode::Id::LOP3_R:
case OpCode::Id::LOP3_IMM: {
std::string op_c = regs.GetRegisterAsInteger(instr.gpr39);
std::string lut;
if (opcode->GetId() == OpCode::Id::LOP3_R) {
lut = '(' + std::to_string(instr.alu.lop3.GetImmLut28()) + ')';
} else {
lut = '(' + std::to_string(instr.alu.lop3.GetImmLut48()) + ')';
}
WriteLop3Instruction(instr.gpr0, op_a, op_b, op_c, lut);
break;
}
case OpCode::Id::IMNMX_C:
case OpCode::Id::IMNMX_R:
case OpCode::Id::IMNMX_IMM: {