forked from suyu/suyu
53 lines
No EOL
1.9 KiB
C++
53 lines
No EOL
1.9 KiB
C++
// Copyright 2018 yuzu Emulator Project
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// Licensed under GPLv2 or any later version
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// Refer to the license.txt file included.
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#include "common/assert.h"
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#include "common/common_types.h"
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#include "video_core/engines/shader_bytecode.h"
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#include "video_core/shader/shader_ir.h"
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namespace VideoCommon::Shader {
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using Tegra::Shader::Instruction;
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using Tegra::Shader::OpCode;
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using Tegra::Shader::Pred;
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u32 ShaderIR::DecodeIntegerSetPredicate(NodeBlock& bb, u32 pc) {
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const Instruction instr = {program_code[pc]};
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const auto opcode = OpCode::Decode(instr);
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const Node op_a = GetRegister(instr.gpr8);
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const Node op_b = [&]() {
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if (instr.is_b_imm) {
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return Immediate(instr.alu.GetSignedImm20_20());
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} else if (instr.is_b_gpr) {
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return GetRegister(instr.gpr20);
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} else {
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return GetConstBuffer(instr.cbuf34.index, instr.cbuf34.GetOffset());
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}
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}();
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// We can't use the constant predicate as destination.
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ASSERT(instr.isetp.pred3 != static_cast<u64>(Pred::UnusedIndex));
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const Node second_pred = GetPredicate(instr.isetp.pred39, instr.isetp.neg_pred != 0);
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const Node predicate =
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GetPredicateComparisonInteger(instr.isetp.cond, instr.isetp.is_signed, op_a, op_b);
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// Set the primary predicate to the result of Predicate OP SecondPredicate
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const OperationCode combiner = GetPredicateCombiner(instr.isetp.op);
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const Node value = Operation(combiner, predicate, second_pred);
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SetPredicate(bb, instr.isetp.pred3, value);
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if (instr.isetp.pred0 != static_cast<u64>(Pred::UnusedIndex)) {
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// Set the secondary predicate to the result of !Predicate OP SecondPredicate, if enabled
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const Node negated_pred = Operation(OperationCode::LogicalNegate, predicate);
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SetPredicate(bb, instr.isetp.pred0, Operation(combiner, negated_pred, second_pred));
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}
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return pc;
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}
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} // namespace VideoCommon::Shader
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