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author | ReinUsesLisp <reinuseslisp@airmail.cc> | 2021-02-17 00:52:12 +0100 |
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committer | ameerj <52414509+ameerj@users.noreply.github.com> | 2021-07-23 03:51:22 +0200 |
commit | c67d64365a712830fe140dd36e24e2efd9b8a812 (patch) | |
tree | 9287589f2b72d1cbd0cb113c2024b2bc531408c3 /src/video_core/shader/decode/shift.cpp | |
parent | shader: Add XMAD multiplication folding optimization (diff) | |
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Diffstat (limited to 'src/video_core/shader/decode/shift.cpp')
-rw-r--r-- | src/video_core/shader/decode/shift.cpp | 153 |
1 files changed, 0 insertions, 153 deletions
diff --git a/src/video_core/shader/decode/shift.cpp b/src/video_core/shader/decode/shift.cpp deleted file mode 100644 index a53819c15..000000000 --- a/src/video_core/shader/decode/shift.cpp +++ /dev/null @@ -1,153 +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 std::move; -using Tegra::Shader::Instruction; -using Tegra::Shader::OpCode; -using Tegra::Shader::ShfType; -using Tegra::Shader::ShfXmode; - -namespace { - -Node IsFull(Node shift) { - return Operation(OperationCode::LogicalIEqual, move(shift), Immediate(32)); -} - -Node Shift(OperationCode opcode, Node value, Node shift) { - Node shifted = Operation(opcode, move(value), shift); - return Operation(OperationCode::Select, IsFull(move(shift)), Immediate(0), move(shifted)); -} - -Node ClampShift(Node shift, s32 size = 32) { - shift = Operation(OperationCode::IMax, move(shift), Immediate(0)); - return Operation(OperationCode::IMin, move(shift), Immediate(size)); -} - -Node WrapShift(Node shift, s32 size = 32) { - return Operation(OperationCode::UBitwiseAnd, move(shift), Immediate(size - 1)); -} - -Node ShiftRight(Node low, Node high, Node shift, Node low_shift, ShfType type) { - // These values are used when the shift value is less than 32 - Node less_low = Shift(OperationCode::ILogicalShiftRight, low, shift); - Node less_high = Shift(OperationCode::ILogicalShiftLeft, high, low_shift); - Node less = Operation(OperationCode::IBitwiseOr, move(less_high), move(less_low)); - - if (type == ShfType::Bits32) { - // On 32 bit shifts we are either full (shifting 32) or shifting less than 32 bits - return Operation(OperationCode::Select, IsFull(move(shift)), move(high), move(less)); - } - - // And these when it's larger than or 32 - const bool is_signed = type == ShfType::S64; - const auto opcode = SignedToUnsignedCode(OperationCode::IArithmeticShiftRight, is_signed); - Node reduced = Operation(OperationCode::IAdd, shift, Immediate(-32)); - Node greater = Shift(opcode, high, move(reduced)); - - Node is_less = Operation(OperationCode::LogicalILessThan, shift, Immediate(32)); - Node is_zero = Operation(OperationCode::LogicalIEqual, move(shift), Immediate(0)); - - Node value = Operation(OperationCode::Select, move(is_less), move(less), move(greater)); - return Operation(OperationCode::Select, move(is_zero), move(high), move(value)); -} - -Node ShiftLeft(Node low, Node high, Node shift, Node low_shift, ShfType type) { - // These values are used when the shift value is less than 32 - Node less_low = Operation(OperationCode::ILogicalShiftRight, low, low_shift); - Node less_high = Operation(OperationCode::ILogicalShiftLeft, high, shift); - Node less = Operation(OperationCode::IBitwiseOr, move(less_low), move(less_high)); - - if (type == ShfType::Bits32) { - // On 32 bit shifts we are either full (shifting 32) or shifting less than 32 bits - return Operation(OperationCode::Select, IsFull(move(shift)), move(low), move(less)); - } - - // And these when it's larger than or 32 - Node reduced = Operation(OperationCode::IAdd, shift, Immediate(-32)); - Node greater = Shift(OperationCode::ILogicalShiftLeft, move(low), move(reduced)); - - Node is_less = Operation(OperationCode::LogicalILessThan, shift, Immediate(32)); - Node is_zero = Operation(OperationCode::LogicalIEqual, move(shift), Immediate(0)); - - Node value = Operation(OperationCode::Select, move(is_less), move(less), move(greater)); - return Operation(OperationCode::Select, move(is_zero), move(high), move(value)); -} - -} // Anonymous namespace - -u32 ShaderIR::DecodeShift(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 = [this, instr] { - if (instr.is_b_imm) { - return Immediate(instr.alu.GetSignedImm20_20()); - } else if (instr.is_b_gpr) { - return GetRegister(instr.gpr20); - } else { - return GetConstBuffer(instr.cbuf34.index, instr.cbuf34.GetOffset()); - } - }(); - - switch (const auto opid = opcode->get().GetId(); opid) { - case OpCode::Id::SHR_C: - case OpCode::Id::SHR_R: - case OpCode::Id::SHR_IMM: { - op_b = instr.shr.wrap ? WrapShift(move(op_b)) : ClampShift(move(op_b)); - - Node value = SignedOperation(OperationCode::IArithmeticShiftRight, instr.shift.is_signed, - move(op_a), move(op_b)); - SetInternalFlagsFromInteger(bb, value, instr.generates_cc); - SetRegister(bb, instr.gpr0, move(value)); - break; - } - case OpCode::Id::SHL_C: - case OpCode::Id::SHL_R: - case OpCode::Id::SHL_IMM: { - Node value = Operation(OperationCode::ILogicalShiftLeft, op_a, op_b); - SetInternalFlagsFromInteger(bb, value, instr.generates_cc); - SetRegister(bb, instr.gpr0, move(value)); - break; - } - case OpCode::Id::SHF_RIGHT_R: - case OpCode::Id::SHF_RIGHT_IMM: - case OpCode::Id::SHF_LEFT_R: - case OpCode::Id::SHF_LEFT_IMM: { - UNIMPLEMENTED_IF(instr.generates_cc); - UNIMPLEMENTED_IF_MSG(instr.shf.xmode != ShfXmode::None, "xmode={}", - instr.shf.xmode.Value()); - - if (instr.is_b_imm) { - op_b = Immediate(static_cast<u32>(instr.shf.immediate)); - } - const s32 size = instr.shf.type == ShfType::Bits32 ? 32 : 64; - Node shift = instr.shf.wrap ? WrapShift(move(op_b), size) : ClampShift(move(op_b), size); - - Node negated_shift = Operation(OperationCode::INegate, shift); - Node low_shift = Operation(OperationCode::IAdd, move(negated_shift), Immediate(32)); - - const bool is_right = opid == OpCode::Id::SHF_RIGHT_R || opid == OpCode::Id::SHF_RIGHT_IMM; - Node value = (is_right ? ShiftRight : ShiftLeft)( - move(op_a), GetRegister(instr.gpr39), move(shift), move(low_shift), instr.shf.type); - - SetRegister(bb, instr.gpr0, move(value)); - break; - } - default: - UNIMPLEMENTED_MSG("Unhandled shift instruction: {}", opcode->get().GetName()); - } - - return pc; -} - -} // namespace VideoCommon::Shader |