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Diffstat (limited to 'src/video_core/shader/decode/conversion.cpp')
| -rw-r--r-- | src/video_core/shader/decode/conversion.cpp | 321 |
1 files changed, 0 insertions, 321 deletions
diff --git a/src/video_core/shader/decode/conversion.cpp b/src/video_core/shader/decode/conversion.cpp deleted file mode 100644 index fea7a54df..000000000 --- a/src/video_core/shader/decode/conversion.cpp +++ /dev/null @@ -1,321 +0,0 @@ -// Copyright 2018 yuzu Emulator Project -// Licensed under GPLv2 or any later version -// Refer to the license.txt file included. - -#include <limits> -#include <optional> -#include <utility> - -#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::Register; - -namespace { - -constexpr OperationCode GetFloatSelector(u64 selector) { - return selector == 0 ? OperationCode::FCastHalf0 : OperationCode::FCastHalf1; -} - -constexpr u32 SizeInBits(Register::Size size) { - switch (size) { - case Register::Size::Byte: - return 8; - case Register::Size::Short: - return 16; - case Register::Size::Word: - return 32; - case Register::Size::Long: - return 64; - } - return 0; -} - -constexpr std::optional<std::pair<s32, s32>> IntegerSaturateBounds(Register::Size src_size, - Register::Size dst_size, - bool src_signed, - bool dst_signed) { - const u32 dst_bits = SizeInBits(dst_size); - if (src_size == Register::Size::Word && dst_size == Register::Size::Word) { - if (src_signed == dst_signed) { - return std::nullopt; - } - return std::make_pair(0, std::numeric_limits<s32>::max()); - } - if (dst_signed) { - // Signed destination, clamp to [-128, 127] for instance - return std::make_pair(-(1 << (dst_bits - 1)), (1 << (dst_bits - 1)) - 1); - } else { - // Unsigned destination - if (dst_bits == 32) { - // Avoid shifting by 32, that is undefined behavior - return std::make_pair(0, s32(std::numeric_limits<u32>::max())); - } - return std::make_pair(0, (1 << dst_bits) - 1); - } -} - -} // Anonymous namespace - -u32 ShaderIR::DecodeConversion(NodeBlock& bb, u32 pc) { - const Instruction instr = {program_code[pc]}; - const auto opcode = OpCode::Decode(instr); - - switch (opcode->get().GetId()) { - case OpCode::Id::I2I_R: - case OpCode::Id::I2I_C: - case OpCode::Id::I2I_IMM: { - const bool src_signed = instr.conversion.is_input_signed; - const bool dst_signed = instr.conversion.is_output_signed; - const Register::Size src_size = instr.conversion.src_size; - const Register::Size dst_size = instr.conversion.dst_size; - const u32 selector = static_cast<u32>(instr.conversion.int_src.selector); - - Node value = [this, instr, opcode] { - switch (opcode->get().GetId()) { - case OpCode::Id::I2I_R: - return GetRegister(instr.gpr20); - case OpCode::Id::I2I_C: - return GetConstBuffer(instr.cbuf34.index, instr.cbuf34.GetOffset()); - case OpCode::Id::I2I_IMM: - return Immediate(instr.alu.GetSignedImm20_20()); - default: - UNREACHABLE(); - return Immediate(0); - } - }(); - - // Ensure the source selector is valid - switch (instr.conversion.src_size) { - case Register::Size::Byte: - break; - case Register::Size::Short: - ASSERT(selector == 0 || selector == 2); - break; - default: - ASSERT(selector == 0); - break; - } - - if (src_size != Register::Size::Word || selector != 0) { - value = SignedOperation(OperationCode::IBitfieldExtract, src_signed, std::move(value), - Immediate(selector * 8), Immediate(SizeInBits(src_size))); - } - - value = GetOperandAbsNegInteger(std::move(value), instr.conversion.abs_a, - instr.conversion.negate_a, src_signed); - - if (instr.alu.saturate_d) { - if (src_signed && !dst_signed) { - Node is_negative = Operation(OperationCode::LogicalUGreaterEqual, value, - Immediate(1 << (SizeInBits(src_size) - 1))); - value = Operation(OperationCode::Select, std::move(is_negative), Immediate(0), - std::move(value)); - - // Simplify generated expressions, this can be removed without semantic impact - SetTemporary(bb, 0, std::move(value)); - value = GetTemporary(0); - - if (dst_size != Register::Size::Word) { - const Node limit = Immediate((1 << SizeInBits(dst_size)) - 1); - Node is_large = - Operation(OperationCode::LogicalUGreaterThan, std::move(value), limit); - value = Operation(OperationCode::Select, std::move(is_large), limit, - std::move(value)); - } - } else if (const std::optional bounds = - IntegerSaturateBounds(src_size, dst_size, src_signed, dst_signed)) { - value = SignedOperation(OperationCode::IMax, src_signed, std::move(value), - Immediate(bounds->first)); - value = SignedOperation(OperationCode::IMin, src_signed, std::move(value), - Immediate(bounds->second)); - } - } else if (dst_size != Register::Size::Word) { - // No saturation, we only have to mask the result - Node mask = Immediate((1 << SizeInBits(dst_size)) - 1); - value = Operation(OperationCode::UBitwiseAnd, std::move(value), std::move(mask)); - } - - SetInternalFlagsFromInteger(bb, value, instr.generates_cc); - SetRegister(bb, instr.gpr0, std::move(value)); - break; - } - case OpCode::Id::I2F_R: - case OpCode::Id::I2F_C: - case OpCode::Id::I2F_IMM: { - UNIMPLEMENTED_IF(instr.conversion.dst_size == Register::Size::Long); - UNIMPLEMENTED_IF_MSG(instr.generates_cc, - "Condition codes generation in I2F is not implemented"); - - Node value = [&] { - switch (opcode->get().GetId()) { - case OpCode::Id::I2F_R: - return GetRegister(instr.gpr20); - case OpCode::Id::I2F_C: - return GetConstBuffer(instr.cbuf34.index, instr.cbuf34.GetOffset()); - case OpCode::Id::I2F_IMM: - return Immediate(instr.alu.GetSignedImm20_20()); - default: - UNREACHABLE(); - return Immediate(0); - } - }(); - - const bool input_signed = instr.conversion.is_input_signed; - - if (const u32 offset = static_cast<u32>(instr.conversion.int_src.selector); offset > 0) { - ASSERT(instr.conversion.src_size == Register::Size::Byte || - instr.conversion.src_size == Register::Size::Short); - if (instr.conversion.src_size == Register::Size::Short) { - ASSERT(offset == 0 || offset == 2); - } - value = SignedOperation(OperationCode::ILogicalShiftRight, input_signed, - std::move(value), Immediate(offset * 8)); - } - - value = ConvertIntegerSize(value, instr.conversion.src_size, input_signed); - value = GetOperandAbsNegInteger(value, instr.conversion.abs_a, false, input_signed); - value = SignedOperation(OperationCode::FCastInteger, input_signed, PRECISE, value); - value = GetOperandAbsNegFloat(value, false, instr.conversion.negate_a); - - SetInternalFlagsFromFloat(bb, value, instr.generates_cc); - - if (instr.conversion.dst_size == Register::Size::Short) { - value = Operation(OperationCode::HCastFloat, PRECISE, value); - } - - SetRegister(bb, instr.gpr0, value); - break; - } - case OpCode::Id::F2F_R: - case OpCode::Id::F2F_C: - case OpCode::Id::F2F_IMM: { - UNIMPLEMENTED_IF(instr.conversion.dst_size == Register::Size::Long); - UNIMPLEMENTED_IF(instr.conversion.src_size == Register::Size::Long); - UNIMPLEMENTED_IF_MSG(instr.generates_cc, - "Condition codes generation in F2F is not implemented"); - - Node value = [&]() { - switch (opcode->get().GetId()) { - case OpCode::Id::F2F_R: - return GetRegister(instr.gpr20); - case OpCode::Id::F2F_C: - return GetConstBuffer(instr.cbuf34.index, instr.cbuf34.GetOffset()); - case OpCode::Id::F2F_IMM: - return GetImmediate19(instr); - default: - UNREACHABLE(); - return Immediate(0); - } - }(); - - if (instr.conversion.src_size == Register::Size::Short) { - value = Operation(GetFloatSelector(instr.conversion.float_src.selector), NO_PRECISE, - std::move(value)); - } else { - ASSERT(instr.conversion.float_src.selector == 0); - } - - value = GetOperandAbsNegFloat(value, instr.conversion.abs_a, instr.conversion.negate_a); - - value = [&] { - if (instr.conversion.src_size != instr.conversion.dst_size) { - // Rounding operations only matter when the source and destination conversion size - // is the same. - return value; - } - switch (instr.conversion.f2f.GetRoundingMode()) { - case Tegra::Shader::F2fRoundingOp::None: - return value; - case Tegra::Shader::F2fRoundingOp::Round: - return Operation(OperationCode::FRoundEven, value); - case Tegra::Shader::F2fRoundingOp::Floor: - return Operation(OperationCode::FFloor, value); - case Tegra::Shader::F2fRoundingOp::Ceil: - return Operation(OperationCode::FCeil, value); - case Tegra::Shader::F2fRoundingOp::Trunc: - return Operation(OperationCode::FTrunc, value); - default: - UNIMPLEMENTED_MSG("Unimplemented F2F rounding mode {}", - instr.conversion.f2f.rounding.Value()); - return value; - } - }(); - value = GetSaturatedFloat(value, instr.alu.saturate_d); - - SetInternalFlagsFromFloat(bb, value, instr.generates_cc); - - if (instr.conversion.dst_size == Register::Size::Short) { - value = Operation(OperationCode::HCastFloat, PRECISE, value); - } - - SetRegister(bb, instr.gpr0, value); - break; - } - case OpCode::Id::F2I_R: - case OpCode::Id::F2I_C: - case OpCode::Id::F2I_IMM: { - UNIMPLEMENTED_IF(instr.conversion.src_size == Register::Size::Long); - UNIMPLEMENTED_IF_MSG(instr.generates_cc, - "Condition codes generation in F2I is not implemented"); - Node value = [&]() { - switch (opcode->get().GetId()) { - case OpCode::Id::F2I_R: - return GetRegister(instr.gpr20); - case OpCode::Id::F2I_C: - return GetConstBuffer(instr.cbuf34.index, instr.cbuf34.GetOffset()); - case OpCode::Id::F2I_IMM: - return GetImmediate19(instr); - default: - UNREACHABLE(); - return Immediate(0); - } - }(); - - if (instr.conversion.src_size == Register::Size::Short) { - value = Operation(GetFloatSelector(instr.conversion.float_src.selector), NO_PRECISE, - std::move(value)); - } else { - ASSERT(instr.conversion.float_src.selector == 0); - } - - value = GetOperandAbsNegFloat(value, instr.conversion.abs_a, instr.conversion.negate_a); - - value = [&]() { - switch (instr.conversion.f2i.rounding) { - case Tegra::Shader::F2iRoundingOp::RoundEven: - return Operation(OperationCode::FRoundEven, PRECISE, value); - case Tegra::Shader::F2iRoundingOp::Floor: - return Operation(OperationCode::FFloor, PRECISE, value); - case Tegra::Shader::F2iRoundingOp::Ceil: - return Operation(OperationCode::FCeil, PRECISE, value); - case Tegra::Shader::F2iRoundingOp::Trunc: - return Operation(OperationCode::FTrunc, PRECISE, value); - default: - UNIMPLEMENTED_MSG("Unimplemented F2I rounding mode {}", - instr.conversion.f2i.rounding.Value()); - return Immediate(0); - } - }(); - const bool is_signed = instr.conversion.is_output_signed; - value = SignedOperation(OperationCode::ICastFloat, is_signed, PRECISE, value); - value = ConvertIntegerSize(value, instr.conversion.dst_size, is_signed); - - SetRegister(bb, instr.gpr0, value); - break; - } - default: - UNIMPLEMENTED_MSG("Unhandled conversion instruction: {}", opcode->get().GetName()); - } - - return pc; -} - -} // namespace VideoCommon::Shader |