mirror of
https://github.com/yuzu-emu/yuzu-mainline.git
synced 2024-10-27 01:25:44 +02:00
53 lines
1.8 KiB
C++
53 lines
1.8 KiB
C++
// Copyright 2018 yuzu Emulator Project
|
|
// Licensed under GPLv2 or any later version
|
|
// Refer to the license.txt file included.
|
|
|
|
#include "common/assert.h"
|
|
#include "common/common_types.h"
|
|
#include "video_core/engines/shader_bytecode.h"
|
|
#include "video_core/shader/node_helper.h"
|
|
#include "video_core/shader/shader_ir.h"
|
|
|
|
namespace VideoCommon::Shader {
|
|
|
|
using Tegra::Shader::Instruction;
|
|
using Tegra::Shader::OpCode;
|
|
|
|
u32 ShaderIR::DecodeBfe(NodeBlock& bb, u32 pc) {
|
|
const Instruction instr = {program_code[pc]};
|
|
const auto opcode = OpCode::Decode(instr);
|
|
|
|
Node op_a = GetRegister(instr.gpr8);
|
|
Node op_b = [&] {
|
|
switch (opcode->get().GetId()) {
|
|
case OpCode::Id::BFE_R:
|
|
return GetRegister(instr.gpr20);
|
|
case OpCode::Id::BFE_C:
|
|
return GetConstBuffer(instr.cbuf34.index, instr.cbuf34.GetOffset());
|
|
case OpCode::Id::BFE_IMM:
|
|
return Immediate(instr.alu.GetSignedImm20_20());
|
|
default:
|
|
UNREACHABLE();
|
|
return Immediate(0);
|
|
}
|
|
}();
|
|
|
|
UNIMPLEMENTED_IF_MSG(instr.bfe.rd_cc, "Condition codes in BFE is not implemented");
|
|
UNIMPLEMENTED_IF_MSG(instr.bfe.brev, "BREV in BFE is not implemented");
|
|
|
|
const bool is_signed = instr.bfe.is_signed;
|
|
|
|
const auto start_position = SignedOperation(OperationCode::IBitfieldExtract, is_signed, op_b,
|
|
Immediate(0), Immediate(8));
|
|
const auto bits = SignedOperation(OperationCode::IBitfieldExtract, is_signed, op_b,
|
|
Immediate(8), Immediate(8));
|
|
|
|
auto result =
|
|
SignedOperation(OperationCode::IBitfieldExtract, is_signed, op_a, start_position, bits);
|
|
SetRegister(bb, instr.gpr0, result);
|
|
|
|
return pc;
|
|
}
|
|
|
|
} // namespace VideoCommon::Shader
|