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Diffstat (limited to 'src/video_core/shader/decode/half_set.cpp')
| -rw-r--r-- | src/video_core/shader/decode/half_set.cpp | 67 |
1 files changed, 67 insertions, 0 deletions
diff --git a/src/video_core/shader/decode/half_set.cpp b/src/video_core/shader/decode/half_set.cpp new file mode 100644 index 000000000..dfd7cb98f --- /dev/null +++ b/src/video_core/shader/decode/half_set.cpp @@ -0,0 +1,67 @@ +// Copyright 2018 yuzu Emulator Project +// Licensed under GPLv2 or any later version +// Refer to the license.txt file included. + +#include <array> + +#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::DecodeHalfSet(BasicBlock& bb, const BasicBlock& code, u32 pc) { + const Instruction instr = {program_code[pc]}; + const auto opcode = OpCode::Decode(instr); + + UNIMPLEMENTED_IF(instr.hset2.ftz != 0); + + // instr.hset2.type_a + // instr.hset2.type_b + Node op_a = GetRegister(instr.gpr8); + Node op_b = [&]() { + switch (opcode->get().GetId()) { + case OpCode::Id::HSET2_R: + return GetRegister(instr.gpr20); + default: + UNREACHABLE(); + return Immediate(0); + } + }(); + + op_a = GetOperandAbsNegHalf(op_a, instr.hset2.abs_a, instr.hset2.negate_a); + op_b = GetOperandAbsNegHalf(op_b, instr.hset2.abs_b, instr.hset2.negate_b); + + const Node second_pred = GetPredicate(instr.hset2.pred39, instr.hset2.neg_pred); + + MetaHalfArithmetic meta{false, {instr.hset2.type_a, instr.hset2.type_b}}; + const Node comparison_pair = GetPredicateComparisonHalf(instr.hset2.cond, meta, op_a, op_b); + + const OperationCode combiner = GetPredicateCombiner(instr.hset2.op); + + // HSET2 operates on each half float in the pack. + std::array<Node, 2> values; + for (u32 i = 0; i < 2; ++i) { + const u32 raw_value = instr.hset2.bf ? 0x3c00 : 0xffff; + const Node true_value = Immediate(raw_value << (i * 16)); + const Node false_value = Immediate(0); + + const Node comparison = + Operation(OperationCode::LogicalPick2, comparison_pair, Immediate(i)); + const Node predicate = Operation(combiner, comparison, second_pred); + + values[i] = + Operation(OperationCode::Select, NO_PRECISE, predicate, true_value, false_value); + } + + const Node value = Operation(OperationCode::UBitwiseOr, NO_PRECISE, values[0], values[1]); + SetRegister(bb, instr.gpr0, value); + + return pc; +} + +} // namespace VideoCommon::Shader
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