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Diffstat (limited to '')
| -rw-r--r-- | src/video_core/shader/decode/integer_set.cpp | 50 |
1 files changed, 50 insertions, 0 deletions
diff --git a/src/video_core/shader/decode/integer_set.cpp b/src/video_core/shader/decode/integer_set.cpp new file mode 100644 index 000000000..85e67b03b --- /dev/null +++ b/src/video_core/shader/decode/integer_set.cpp @@ -0,0 +1,50 @@ +// 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::DecodeIntegerSet(BasicBlock& bb, const BasicBlock& code, u32 pc) { + const Instruction instr = {program_code[pc]}; + const auto opcode = OpCode::Decode(instr); + + const Node op_a = GetRegister(instr.gpr8); + const Node op_b = [&]() { + if (instr.is_b_imm) { + return Immediate(instr.alu.GetSignedImm20_20()); + } else if (instr.is_b_gpr) { + return GetRegister(instr.gpr20); + } else { + return GetConstBuffer(instr.cbuf34.index, instr.cbuf34.offset); + } + }(); + + // The iset 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.iset.pred39, instr.iset.neg_pred != 0); + const Node first_pred = + GetPredicateComparisonInteger(instr.iset.cond, instr.iset.is_signed, op_a, op_b); + + const OperationCode combiner = GetPredicateCombiner(instr.iset.op); + + const Node predicate = Operation(combiner, first_pred, second_pred); + + const Node true_value = instr.iset.bf ? Immediate(1.0f) : Immediate(-1); + const Node false_value = instr.iset.bf ? Immediate(0.0f) : Immediate(0); + const Node value = + Operation(OperationCode::Select, PRECISE, predicate, true_value, false_value); + + SetRegister(bb, instr.gpr0, value); + + return pc; +} + +} // namespace VideoCommon::Shader
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