diff options
Diffstat (limited to 'src/video_core/shader/decode/float_set_predicate.cpp')
-rw-r--r-- | src/video_core/shader/decode/float_set_predicate.cpp | 56 |
1 files changed, 56 insertions, 0 deletions
diff --git a/src/video_core/shader/decode/float_set_predicate.cpp b/src/video_core/shader/decode/float_set_predicate.cpp new file mode 100644 index 000000000..dd3aef6f2 --- /dev/null +++ b/src/video_core/shader/decode/float_set_predicate.cpp @@ -0,0 +1,56 @@ +// 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; +using Tegra::Shader::Pred; + +u32 ShaderIR::DecodeFloatSetPredicate(BasicBlock& bb, const BasicBlock& code, u32 pc) { + const Instruction instr = {program_code[pc]}; + const auto opcode = OpCode::Decode(instr); + + const Node op_a = GetOperandAbsNegFloat(GetRegister(instr.gpr8), instr.fsetp.abs_a != 0, + instr.fsetp.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.GetOffset()); + } + }(); + op_b = GetOperandAbsNegFloat(op_b, instr.fsetp.abs_b, false); + + // We can't use the constant predicate as destination. + ASSERT(instr.fsetp.pred3 != static_cast<u64>(Pred::UnusedIndex)); + + const Node predicate = GetPredicateComparisonFloat(instr.fsetp.cond, op_a, op_b); + const Node second_pred = GetPredicate(instr.fsetp.pred39, instr.fsetp.neg_pred != 0); + + const OperationCode combiner = GetPredicateCombiner(instr.fsetp.op); + const Node value = Operation(combiner, predicate, second_pred); + + // Set the primary predicate to the result of Predicate OP SecondPredicate + SetPredicate(bb, instr.fsetp.pred3, value); + + if (instr.fsetp.pred0 != static_cast<u64>(Pred::UnusedIndex)) { + // Set the secondary predicate to the result of !Predicate OP SecondPredicate, + // if enabled + const Node negated_pred = Operation(OperationCode::LogicalNegate, predicate); + const Node second_value = Operation(combiner, negated_pred, second_pred); + SetPredicate(bb, instr.fsetp.pred0, second_value); + } + + return pc; +} + +} // namespace VideoCommon::Shader
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