From e444a6553faa019b20a81a3b7380ecccfd7d3725 Mon Sep 17 00:00:00 2001 From: ReinUsesLisp Date: Sun, 16 Dec 2018 03:57:10 -0300 Subject: [PATCH] shader_decode: Implement FSET --- src/video_core/shader/decode/float_set.cpp | 37 +++++++++++++++++++++- 1 file changed, 36 insertions(+), 1 deletion(-) diff --git a/src/video_core/shader/decode/float_set.cpp b/src/video_core/shader/decode/float_set.cpp index 17d47c17a..355fabc09 100644 --- a/src/video_core/shader/decode/float_set.cpp +++ b/src/video_core/shader/decode/float_set.cpp @@ -16,7 +16,42 @@ u32 ShaderIR::DecodeFloatSet(BasicBlock& bb, u32 pc) { const Instruction instr = {program_code[pc]}; const auto opcode = OpCode::Decode(instr); - UNIMPLEMENTED(); + const Node op_a = GetOperandAbsNegFloat(GetRegister(instr.gpr8), instr.fset.abs_a != 0, + instr.fset.neg_a != 0); + + Node op_b = [&]() { + if (instr.is_b_imm) { + return GetImmediate19(instr); + } else if (instr.is_b_gpr) { + return GetRegister(instr.gpr20); + } else { + return GetConstBuffer(instr.cbuf34.index, instr.cbuf34.offset); + } + }(); + + op_b = GetOperandAbsNegFloat(op_b, instr.fset.abs_b != 0, instr.fset.neg_b != 0); + + // The fset instruction sets a register to 1.0 or -1 (depending on the bf bit) if the + // condition is true, and to 0 otherwise. + const Node second_pred = GetPredicate(instr.fset.pred39, instr.fset.neg_pred != 0); + + const OperationCode combiner = GetPredicateCombiner(instr.fset.op); + const Node first_pred = GetPredicateComparisonFloat(instr.fset.cond, op_a, op_b); + + const Node predicate = Operation(combiner, first_pred, second_pred); + + const Node true_value = instr.fset.bf ? Immediate(1.0f) : Immediate(-1); + const Node false_value = instr.fset.bf ? Immediate(0.0f) : Immediate(0); + const Node value = + Operation(OperationCode::Select, PRECISE, predicate, true_value, false_value); + + SetRegister(bb, instr.gpr0, value); + + if (instr.generates_cc.Value() != 0) { + const Node is_zero = Operation(OperationCode::LogicalFEqual, predicate, Immediate(0.0f)); + SetInternalFlag(bb, InternalFlag::Zero, is_zero); + LOG_WARNING(HW_GPU, "FSET condition code is incomplete"); + } return pc; }