diff options
Diffstat (limited to 'src/video_core/shader/decode/ffma.cpp')
| -rw-r--r-- | src/video_core/shader/decode/ffma.cpp | 59 |
1 files changed, 59 insertions, 0 deletions
diff --git a/src/video_core/shader/decode/ffma.cpp b/src/video_core/shader/decode/ffma.cpp new file mode 100644 index 000000000..be8dc2230 --- /dev/null +++ b/src/video_core/shader/decode/ffma.cpp @@ -0,0 +1,59 @@ +// 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::DecodeFfma(BasicBlock& bb, const BasicBlock& code, u32 pc) { + const Instruction instr = {program_code[pc]}; + const auto opcode = OpCode::Decode(instr); + + UNIMPLEMENTED_IF_MSG(instr.ffma.cc != 0, "FFMA cc not implemented"); + UNIMPLEMENTED_IF_MSG(instr.ffma.tab5980_0 != 1, "FFMA tab5980_0({}) not implemented", + instr.ffma.tab5980_0.Value()); // Seems to be 1 by default based on SMO + UNIMPLEMENTED_IF_MSG(instr.ffma.tab5980_1 != 0, "FFMA tab5980_1({}) not implemented", + instr.ffma.tab5980_1.Value()); + + const Node op_a = GetRegister(instr.gpr8); + + auto [op_b, op_c] = [&]() -> std::tuple<Node, Node> { + switch (opcode->get().GetId()) { + case OpCode::Id::FFMA_CR: { + return {GetConstBuffer(instr.cbuf34.index, instr.cbuf34.offset), + GetRegister(instr.gpr39)}; + } + case OpCode::Id::FFMA_RR: + return {GetRegister(instr.gpr20), GetRegister(instr.gpr39)}; + case OpCode::Id::FFMA_RC: { + return {GetRegister(instr.gpr39), + GetConstBuffer(instr.cbuf34.index, instr.cbuf34.offset)}; + } + case OpCode::Id::FFMA_IMM: + return {GetImmediate19(instr), GetRegister(instr.gpr39)}; + default: + UNIMPLEMENTED_MSG("Unhandled FFMA instruction: {}", opcode->get().GetName()); + return {Immediate(0), Immediate(0)}; + } + }(); + + op_b = GetOperandAbsNegFloat(op_b, false, instr.ffma.negate_b); + op_c = GetOperandAbsNegFloat(op_c, false, instr.ffma.negate_c); + + Node value = Operation(OperationCode::FFma, PRECISE, op_a, op_b, op_c); + value = GetSaturatedFloat(value, instr.alu.saturate_d); + + SetInternalFlagsFromFloat(bb, value, instr.generates_cc); + SetRegister(bb, instr.gpr0, value); + + return pc; +} + +} // namespace VideoCommon::Shader
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