diff options
Diffstat (limited to 'src/video_core/shader')
| -rw-r--r-- | src/video_core/shader/decode/arithmetic.cpp | 42 |
1 files changed, 42 insertions, 0 deletions
diff --git a/src/video_core/shader/decode/arithmetic.cpp b/src/video_core/shader/decode/arithmetic.cpp index c297f729e..78bca79e3 100644 --- a/src/video_core/shader/decode/arithmetic.cpp +++ b/src/video_core/shader/decode/arithmetic.cpp @@ -36,6 +36,48 @@ u32 ShaderIR::DecodeArithmetic(BasicBlock& bb, u32 pc) { SetRegister(bb, instr.gpr0, op_b); break; } + case OpCode::Id::FMUL_C: + case OpCode::Id::FMUL_R: + case OpCode::Id::FMUL_IMM: { + // FMUL does not have 'abs' bits and only the second operand has a 'neg' bit. + UNIMPLEMENTED_IF_MSG(instr.fmul.tab5cb8_2 != 0, "FMUL tab5cb8_2({}) is not implemented", + instr.fmul.tab5cb8_2.Value()); + UNIMPLEMENTED_IF_MSG( + instr.fmul.tab5c68_0 != 1, "FMUL tab5cb8_0({}) is not implemented", + instr.fmul.tab5c68_0.Value()); // SMO typical sends 1 here which seems to be the default + UNIMPLEMENTED_IF_MSG(instr.generates_cc, + "Condition codes generation in FMUL is not implemented"); + + op_b = GetOperandAbsNegFloat(op_b, false, instr.fmul.negate_b); + + // TODO(Rodrigo): Should precise be used when there's a postfactor? + Node value = Operation(OperationCode::FMul, PRECISE, op_a, op_b); + + if (instr.fmul.postfactor != 0) { + auto postfactor = static_cast<s32>(instr.fmul.postfactor); + + // Postfactor encoded as 3-bit 1's complement in instruction, interpreted with below + // logic. + if (postfactor >= 4) { + postfactor = 7 - postfactor; + } else { + postfactor = 0 - postfactor; + } + + if (postfactor > 0) { + value = Operation(OperationCode::FMul, NO_PRECISE, value, + Immediate(static_cast<f32>(1 << postfactor))); + } else { + value = Operation(OperationCode::FDiv, NO_PRECISE, value, + Immediate(static_cast<f32>(1 << -postfactor))); + } + } + + value = GetSaturatedFloat(value, instr.alu.saturate_d); + + SetRegister(bb, instr.gpr0, value); + break; + } default: UNIMPLEMENTED_MSG("Unhandled arithmetic instruction: {}", opcode->get().GetName()); } |