summaryrefslogtreecommitdiffstats
path: root/src/video_core/shader/decode/bfe.cpp
diff options
context:
space:
mode:
Diffstat (limited to 'src/video_core/shader/decode/bfe.cpp')
-rw-r--r--src/video_core/shader/decode/bfe.cpp77
1 files changed, 0 insertions, 77 deletions
diff --git a/src/video_core/shader/decode/bfe.cpp b/src/video_core/shader/decode/bfe.cpp
deleted file mode 100644
index 8e3b46e8e..000000000
--- a/src/video_core/shader/decode/bfe.cpp
+++ /dev/null
@@ -1,77 +0,0 @@
-// 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/node_helper.h"
-#include "video_core/shader/shader_ir.h"
-
-namespace VideoCommon::Shader {
-
-using Tegra::Shader::Instruction;
-using Tegra::Shader::OpCode;
-
-u32 ShaderIR::DecodeBfe(NodeBlock& bb, u32 pc) {
- const Instruction instr = {program_code[pc]};
- const auto opcode = OpCode::Decode(instr);
-
- Node op_a = GetRegister(instr.gpr8);
- Node op_b = [&] {
- switch (opcode->get().GetId()) {
- case OpCode::Id::BFE_R:
- return GetRegister(instr.gpr20);
- case OpCode::Id::BFE_C:
- return GetConstBuffer(instr.cbuf34.index, instr.cbuf34.GetOffset());
- case OpCode::Id::BFE_IMM:
- return Immediate(instr.alu.GetSignedImm20_20());
- default:
- UNREACHABLE();
- return Immediate(0);
- }
- }();
-
- UNIMPLEMENTED_IF_MSG(instr.bfe.rd_cc, "Condition codes in BFE is not implemented");
-
- const bool is_signed = instr.bfe.is_signed;
-
- // using reverse parallel method in
- // https://graphics.stanford.edu/~seander/bithacks.html#ReverseParallel
- // note for later if possible to implement faster method.
- if (instr.bfe.brev) {
- const auto swap = [&](u32 s, u32 mask) {
- Node v1 =
- SignedOperation(OperationCode::ILogicalShiftRight, is_signed, op_a, Immediate(s));
- if (mask != 0) {
- v1 = SignedOperation(OperationCode::IBitwiseAnd, is_signed, std::move(v1),
- Immediate(mask));
- }
- Node v2 = op_a;
- if (mask != 0) {
- v2 = SignedOperation(OperationCode::IBitwiseAnd, is_signed, std::move(v2),
- Immediate(mask));
- }
- v2 = SignedOperation(OperationCode::ILogicalShiftLeft, is_signed, std::move(v2),
- Immediate(s));
- return SignedOperation(OperationCode::IBitwiseOr, is_signed, std::move(v1),
- std::move(v2));
- };
- op_a = swap(1, 0x55555555U);
- op_a = swap(2, 0x33333333U);
- op_a = swap(4, 0x0F0F0F0FU);
- op_a = swap(8, 0x00FF00FFU);
- op_a = swap(16, 0);
- }
-
- const auto offset = SignedOperation(OperationCode::IBitfieldExtract, is_signed, op_b,
- Immediate(0), Immediate(8));
- const auto bits = SignedOperation(OperationCode::IBitfieldExtract, is_signed, op_b,
- Immediate(8), Immediate(8));
- auto result = SignedOperation(OperationCode::IBitfieldExtract, is_signed, op_a, offset, bits);
- SetRegister(bb, instr.gpr0, std::move(result));
-
- return pc;
-}
-
-} // namespace VideoCommon::Shader