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author | bunnei <bunneidev@gmail.com> | 2019-01-26 05:42:14 +0100 |
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committer | GitHub <noreply@github.com> | 2019-01-26 05:42:14 +0100 |
commit | 1f4ca1e841cd0b0427218d787efe10a3fa62df33 (patch) | |
tree | 00cc1743c6a6ba593e3b56897b13c2272a71d779 /src/video_core/shader/decode/float_set.cpp | |
parent | Merge pull request #2054 from bunnei/scope-context-refactor (diff) | |
parent | shader_ir: Fixup clang build (diff) | |
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Diffstat (limited to 'src/video_core/shader/decode/float_set.cpp')
-rw-r--r-- | src/video_core/shader/decode/float_set.cpp | 58 |
1 files changed, 58 insertions, 0 deletions
diff --git a/src/video_core/shader/decode/float_set.cpp b/src/video_core/shader/decode/float_set.cpp new file mode 100644 index 000000000..ba846f1bd --- /dev/null +++ b/src/video_core/shader/decode/float_set.cpp @@ -0,0 +1,58 @@ +// 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::DecodeFloatSet(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.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); + + if (instr.fset.bf) { + SetInternalFlagsFromFloat(bb, value, instr.generates_cc); + } else { + SetInternalFlagsFromInteger(bb, value, instr.generates_cc); + } + SetRegister(bb, instr.gpr0, value); + + return pc; +} + +} // namespace VideoCommon::Shader
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