diff options
Diffstat (limited to 'src/video_core/shader/decode/bfe.cpp')
| -rw-r--r-- | src/video_core/shader/decode/bfe.cpp | 49 |
1 files changed, 49 insertions, 0 deletions
diff --git a/src/video_core/shader/decode/bfe.cpp b/src/video_core/shader/decode/bfe.cpp new file mode 100644 index 000000000..0734141b0 --- /dev/null +++ b/src/video_core/shader/decode/bfe.cpp @@ -0,0 +1,49 @@ +// 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/shader_ir.h" + +namespace VideoCommon::Shader { + +using Tegra::Shader::Instruction; +using Tegra::Shader::OpCode; + +u32 ShaderIR::DecodeBfe(BasicBlock& bb, const BasicBlock& code, u32 pc) { + const Instruction instr = {program_code[pc]}; + const auto opcode = OpCode::Decode(instr); + + UNIMPLEMENTED_IF(instr.bfe.negate_b); + + Node op_a = GetRegister(instr.gpr8); + op_a = GetOperandAbsNegInteger(op_a, false, instr.bfe.negate_a, false); + + switch (opcode->get().GetId()) { + case OpCode::Id::BFE_IMM: { + UNIMPLEMENTED_IF_MSG(instr.generates_cc, + "Condition codes generation in BFE is not implemented"); + + const Node inner_shift_imm = Immediate(static_cast<u32>(instr.bfe.GetLeftShiftValue())); + const Node outer_shift_imm = + Immediate(static_cast<u32>(instr.bfe.GetLeftShiftValue() + instr.bfe.shift_position)); + + const Node inner_shift = + Operation(OperationCode::ILogicalShiftLeft, NO_PRECISE, op_a, inner_shift_imm); + const Node outer_shift = + Operation(OperationCode::ILogicalShiftRight, NO_PRECISE, inner_shift, outer_shift_imm); + + SetInternalFlagsFromInteger(bb, outer_shift, instr.generates_cc); + SetRegister(bb, instr.gpr0, outer_shift); + break; + } + default: + UNIMPLEMENTED_MSG("Unhandled BFE instruction: {}", opcode->get().GetName()); + } + + return pc; +} + +} // namespace VideoCommon::Shader
\ No newline at end of file |