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authorbunnei <bunneidev@gmail.com>2019-01-26 05:42:14 +0100
committerGitHub <noreply@github.com>2019-01-26 05:42:14 +0100
commit1f4ca1e841cd0b0427218d787efe10a3fa62df33 (patch)
tree00cc1743c6a6ba593e3b56897b13c2272a71d779 /src/video_core/shader/decode/bfe.cpp
parentMerge pull request #2054 from bunnei/scope-context-refactor (diff)
parentshader_ir: Fixup clang build (diff)
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Diffstat (limited to 'src/video_core/shader/decode/bfe.cpp')
-rw-r--r--src/video_core/shader/decode/bfe.cpp49
1 files changed, 49 insertions, 0 deletions
diff --git a/src/video_core/shader/decode/bfe.cpp b/src/video_core/shader/decode/bfe.cpp
new file mode 100644
index 000000000..0734141b0
--- /dev/null
+++ b/src/video_core/shader/decode/bfe.cpp
@@ -0,0 +1,49 @@
+// 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::DecodeBfe(BasicBlock& bb, const BasicBlock& code, u32 pc) {
+ const Instruction instr = {program_code[pc]};
+ const auto opcode = OpCode::Decode(instr);
+
+ UNIMPLEMENTED_IF(instr.bfe.negate_b);
+
+ Node op_a = GetRegister(instr.gpr8);
+ op_a = GetOperandAbsNegInteger(op_a, false, instr.bfe.negate_a, false);
+
+ switch (opcode->get().GetId()) {
+ case OpCode::Id::BFE_IMM: {
+ UNIMPLEMENTED_IF_MSG(instr.generates_cc,
+ "Condition codes generation in BFE is not implemented");
+
+ const Node inner_shift_imm = Immediate(static_cast<u32>(instr.bfe.GetLeftShiftValue()));
+ const Node outer_shift_imm =
+ Immediate(static_cast<u32>(instr.bfe.GetLeftShiftValue() + instr.bfe.shift_position));
+
+ const Node inner_shift =
+ Operation(OperationCode::ILogicalShiftLeft, NO_PRECISE, op_a, inner_shift_imm);
+ const Node outer_shift =
+ Operation(OperationCode::ILogicalShiftRight, NO_PRECISE, inner_shift, outer_shift_imm);
+
+ SetInternalFlagsFromInteger(bb, outer_shift, instr.generates_cc);
+ SetRegister(bb, instr.gpr0, outer_shift);
+ break;
+ }
+ default:
+ UNIMPLEMENTED_MSG("Unhandled BFE instruction: {}", opcode->get().GetName());
+ }
+
+ return pc;
+}
+
+} // namespace VideoCommon::Shader \ No newline at end of file