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-rw-r--r--src/video_core/shader/decode/conversion.cpp38
1 files changed, 37 insertions, 1 deletions
diff --git a/src/video_core/shader/decode/conversion.cpp b/src/video_core/shader/decode/conversion.cpp
index c6eb2952c..465c63a9e 100644
--- a/src/video_core/shader/decode/conversion.cpp
+++ b/src/video_core/shader/decode/conversion.cpp
@@ -11,12 +11,48 @@ namespace VideoCommon::Shader {
using Tegra::Shader::Instruction;
using Tegra::Shader::OpCode;
+using Tegra::Shader::Register;
u32 ShaderIR::DecodeConversion(BasicBlock& bb, u32 pc) {
const Instruction instr = {program_code[pc]};
const auto opcode = OpCode::Decode(instr);
- UNIMPLEMENTED();
+ switch (opcode->get().GetId()) {
+ case OpCode::Id::F2F_R: {
+ UNIMPLEMENTED_IF(instr.conversion.dest_size != Register::Size::Word);
+ UNIMPLEMENTED_IF(instr.conversion.src_size != Register::Size::Word);
+ UNIMPLEMENTED_IF_MSG(instr.generates_cc,
+ "Condition codes generation in F2F is not implemented");
+
+ Node value = GetRegister(instr.gpr20);
+ value = GetOperandAbsNegFloat(value, instr.conversion.abs_a, instr.conversion.negate_a);
+
+ value = [&]() {
+ switch (instr.conversion.f2f.rounding) {
+ case Tegra::Shader::F2fRoundingOp::None:
+ return value;
+ case Tegra::Shader::F2fRoundingOp::Round:
+ return Operation(OperationCode::FRoundEven, PRECISE, value);
+ case Tegra::Shader::F2fRoundingOp::Floor:
+ return Operation(OperationCode::FFloor, PRECISE, value);
+ case Tegra::Shader::F2fRoundingOp::Ceil:
+ return Operation(OperationCode::FCeil, PRECISE, value);
+ case Tegra::Shader::F2fRoundingOp::Trunc:
+ return Operation(OperationCode::FTrunc, PRECISE, value);
+ default:
+ UNIMPLEMENTED_MSG("Unimplemented F2F rounding mode {}",
+ static_cast<u32>(instr.conversion.f2f.rounding.Value()));
+ break;
+ }
+ }();
+ value = GetSaturatedFloat(value, instr.alu.saturate_d);
+
+ SetRegister(bb, instr.gpr0, value);
+ break;
+ }
+ default:
+ UNIMPLEMENTED_MSG("Unhandled conversion instruction: {}", opcode->get().GetName());
+ }
return pc;
}