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authorReinUsesLisp <reinuseslisp@airmail.cc>2021-02-17 00:52:12 +0100
committerameerj <52414509+ameerj@users.noreply.github.com>2021-07-23 03:51:22 +0200
commitc67d64365a712830fe140dd36e24e2efd9b8a812 (patch)
tree9287589f2b72d1cbd0cb113c2024b2bc531408c3 /src/video_core/shader/decode/xmad.cpp
parentshader: Add XMAD multiplication folding optimization (diff)
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Diffstat (limited to 'src/video_core/shader/decode/xmad.cpp')
-rw-r--r--src/video_core/shader/decode/xmad.cpp156
1 files changed, 0 insertions, 156 deletions
diff --git a/src/video_core/shader/decode/xmad.cpp b/src/video_core/shader/decode/xmad.cpp
deleted file mode 100644
index 233b8fa42..000000000
--- a/src/video_core/shader/decode/xmad.cpp
+++ /dev/null
@@ -1,156 +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;
-using Tegra::Shader::PredCondition;
-
-u32 ShaderIR::DecodeXmad(NodeBlock& bb, u32 pc) {
- const Instruction instr = {program_code[pc]};
- const auto opcode = OpCode::Decode(instr);
-
- UNIMPLEMENTED_IF(instr.xmad.sign_a);
- UNIMPLEMENTED_IF(instr.xmad.sign_b);
- UNIMPLEMENTED_IF_MSG(instr.generates_cc,
- "Condition codes generation in XMAD is not implemented");
-
- Node op_a = GetRegister(instr.gpr8);
-
- // TODO(bunnei): Needs to be fixed once op_a or op_b is signed
- UNIMPLEMENTED_IF(instr.xmad.sign_a != instr.xmad.sign_b);
- const bool is_signed_a = instr.xmad.sign_a == 1;
- const bool is_signed_b = instr.xmad.sign_b == 1;
- const bool is_signed_c = is_signed_a;
-
- auto [is_merge, is_psl, is_high_b, mode, op_b_binding,
- op_c] = [&]() -> std::tuple<bool, bool, bool, Tegra::Shader::XmadMode, Node, Node> {
- switch (opcode->get().GetId()) {
- case OpCode::Id::XMAD_CR:
- return {instr.xmad.merge_56,
- instr.xmad.product_shift_left_second,
- instr.xmad.high_b,
- instr.xmad.mode_cbf,
- GetConstBuffer(instr.cbuf34.index, instr.cbuf34.GetOffset()),
- GetRegister(instr.gpr39)};
- case OpCode::Id::XMAD_RR:
- return {instr.xmad.merge_37, instr.xmad.product_shift_left, instr.xmad.high_b_rr,
- instr.xmad.mode, GetRegister(instr.gpr20), GetRegister(instr.gpr39)};
- case OpCode::Id::XMAD_RC:
- return {false,
- false,
- instr.xmad.high_b,
- instr.xmad.mode_cbf,
- GetRegister(instr.gpr39),
- GetConstBuffer(instr.cbuf34.index, instr.cbuf34.GetOffset())};
- case OpCode::Id::XMAD_IMM:
- return {instr.xmad.merge_37,
- instr.xmad.product_shift_left,
- false,
- instr.xmad.mode,
- Immediate(static_cast<u32>(instr.xmad.imm20_16)),
- GetRegister(instr.gpr39)};
- default:
- UNIMPLEMENTED_MSG("Unhandled XMAD instruction: {}", opcode->get().GetName());
- return {false, false, false, Tegra::Shader::XmadMode::None, Immediate(0), Immediate(0)};
- }
- }();
-
- op_a = SignedOperation(OperationCode::IBitfieldExtract, is_signed_a, std::move(op_a),
- instr.xmad.high_a ? Immediate(16) : Immediate(0), Immediate(16));
-
- const Node original_b = op_b_binding;
- const Node op_b =
- SignedOperation(OperationCode::IBitfieldExtract, is_signed_b, std::move(op_b_binding),
- is_high_b ? Immediate(16) : Immediate(0), Immediate(16));
-
- // we already check sign_a and sign_b is difference or not before so just use one in here.
- Node product = SignedOperation(OperationCode::IMul, is_signed_a, op_a, op_b);
- if (is_psl) {
- product =
- SignedOperation(OperationCode::ILogicalShiftLeft, is_signed_a, product, Immediate(16));
- }
- SetTemporary(bb, 0, product);
- product = GetTemporary(0);
-
- Node original_c = op_c;
- const Tegra::Shader::XmadMode set_mode = mode; // Workaround to clang compile error
- op_c = [&] {
- switch (set_mode) {
- case Tegra::Shader::XmadMode::None:
- return original_c;
- case Tegra::Shader::XmadMode::CLo:
- return BitfieldExtract(std::move(original_c), 0, 16);
- case Tegra::Shader::XmadMode::CHi:
- return BitfieldExtract(std::move(original_c), 16, 16);
- case Tegra::Shader::XmadMode::CBcc: {
- Node shifted_b = SignedOperation(OperationCode::ILogicalShiftLeft, is_signed_b,
- original_b, Immediate(16));
- return SignedOperation(OperationCode::IAdd, is_signed_c, std::move(original_c),
- std::move(shifted_b));
- }
- case Tegra::Shader::XmadMode::CSfu: {
- const Node comp_a =
- GetPredicateComparisonInteger(PredCondition::EQ, is_signed_a, op_a, Immediate(0));
- const Node comp_b =
- GetPredicateComparisonInteger(PredCondition::EQ, is_signed_b, op_b, Immediate(0));
- const Node comp = Operation(OperationCode::LogicalOr, comp_a, comp_b);
-
- const Node comp_minus_a = GetPredicateComparisonInteger(
- PredCondition::NE, is_signed_a,
- SignedOperation(OperationCode::IBitwiseAnd, is_signed_a, op_a,
- Immediate(0x80000000)),
- Immediate(0));
- const Node comp_minus_b = GetPredicateComparisonInteger(
- PredCondition::NE, is_signed_b,
- SignedOperation(OperationCode::IBitwiseAnd, is_signed_b, op_b,
- Immediate(0x80000000)),
- Immediate(0));
-
- Node new_c = Operation(
- OperationCode::Select, comp_minus_a,
- SignedOperation(OperationCode::IAdd, is_signed_c, original_c, Immediate(-65536)),
- original_c);
- new_c = Operation(
- OperationCode::Select, comp_minus_b,
- SignedOperation(OperationCode::IAdd, is_signed_c, new_c, Immediate(-65536)),
- std::move(new_c));
-
- return Operation(OperationCode::Select, comp, original_c, std::move(new_c));
- }
- default:
- UNREACHABLE();
- return Immediate(0);
- }
- }();
-
- SetTemporary(bb, 1, op_c);
- op_c = GetTemporary(1);
-
- // TODO(Rodrigo): Use an appropiate sign for this operation
- Node sum = SignedOperation(OperationCode::IAdd, is_signed_a, product, std::move(op_c));
- SetTemporary(bb, 2, sum);
- sum = GetTemporary(2);
- if (is_merge) {
- const Node a = SignedOperation(OperationCode::IBitfieldExtract, is_signed_a, std::move(sum),
- Immediate(0), Immediate(16));
- const Node b = SignedOperation(OperationCode::ILogicalShiftLeft, is_signed_b, original_b,
- Immediate(16));
- sum = SignedOperation(OperationCode::IBitwiseOr, is_signed_a, a, b);
- }
-
- SetInternalFlagsFromInteger(bb, sum, instr.generates_cc);
- SetRegister(bb, instr.gpr0, std::move(sum));
-
- return pc;
-}
-
-} // namespace VideoCommon::Shader