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shader_bytecode: Make use of [[nodiscard]] where applicable

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Ensures that all queried values are made use of.
This commit is contained in:
Lioncash 2020-11-20 02:20:34 -05:00
parent 56ecafc204
commit b7cd5d742e
1 changed files with 79 additions and 73 deletions
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152
src/video_core/engines/shader_bytecode.h
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@ -34,29 +34,29 @@ struct Register {
constexpr Register(u64 value_) : value(value_) {} constexpr Register(u64 value_) : value(value_) {}
constexpr operator u64() const { [[nodiscard]] constexpr operator u64() const {
return value; return value;
} }
template <typename T> template <typename T>
constexpr u64 operator-(const T& oth) const { [[nodiscard]] constexpr u64 operator-(const T& oth) const {
return value - oth; return value - oth;
} }
template <typename T> template <typename T>
constexpr u64 operator&(const T& oth) const { [[nodiscard]] constexpr u64 operator&(const T& oth) const {
return value & oth; return value & oth;
} }
constexpr u64 operator&(const Register& oth) const { [[nodiscard]] constexpr u64 operator&(const Register& oth) const {
return value & oth.value; return value & oth.value;
} }
constexpr u64 operator~() const { [[nodiscard]] constexpr u64 operator~() const {
return ~value; return ~value;
} }
u64 GetSwizzledIndex(u64 elem) const { [[nodiscard]] u64 GetSwizzledIndex(u64 elem) const {
elem = (value + elem) & 3; elem = (value + elem) & 3;
return (value & ~3) + elem; return (value & ~3) + elem;
} }
@ -107,7 +107,7 @@ union Attribute {
BitField<31, 1, u64> patch; BitField<31, 1, u64> patch;
BitField<47, 3, AttributeSize> size; BitField<47, 3, AttributeSize> size;
bool IsPhysical() const { [[nodiscard]] bool IsPhysical() const {
return patch == 0 && element == 0 && static_cast<u64>(index.Value()) == 0; return patch == 0 && element == 0 && static_cast<u64>(index.Value()) == 0;
} }
} fmt20; } fmt20;
@ -505,14 +505,14 @@ struct IpaMode {
IpaInterpMode interpolation_mode; IpaInterpMode interpolation_mode;
IpaSampleMode sampling_mode; IpaSampleMode sampling_mode;
bool operator==(const IpaMode& a) const { [[nodiscard]] bool operator==(const IpaMode& a) const {
return std::tie(interpolation_mode, sampling_mode) == return std::tie(interpolation_mode, sampling_mode) ==
std::tie(a.interpolation_mode, a.sampling_mode); std::tie(a.interpolation_mode, a.sampling_mode);
} }
bool operator!=(const IpaMode& a) const { [[nodiscard]] bool operator!=(const IpaMode& a) const {
return !operator==(a); return !operator==(a);
} }
bool operator<(const IpaMode& a) const { [[nodiscard]] bool operator<(const IpaMode& a) const {
return std::tie(interpolation_mode, sampling_mode) < return std::tie(interpolation_mode, sampling_mode) <
std::tie(a.interpolation_mode, a.sampling_mode); std::tie(a.interpolation_mode, a.sampling_mode);
} }
@ -661,7 +661,7 @@ union Instruction {
constexpr Instruction(u64 value_) : value{value_} {} constexpr Instruction(u64 value_) : value{value_} {}
constexpr Instruction(const Instruction& instr) : value(instr.value) {} constexpr Instruction(const Instruction& instr) : value(instr.value) {}
constexpr bool Bit(u64 offset) const { [[nodiscard]] constexpr bool Bit(u64 offset) const {
return ((value >> offset) & 1) != 0; return ((value >> offset) & 1) != 0;
} }
@ -746,34 +746,34 @@ union Instruction {
BitField<28, 8, u64> imm_lut28; BitField<28, 8, u64> imm_lut28;
BitField<48, 8, u64> imm_lut48; BitField<48, 8, u64> imm_lut48;
u32 GetImmLut28() const { [[nodiscard]] u32 GetImmLut28() const {
return static_cast<u32>(imm_lut28); return static_cast<u32>(imm_lut28);
} }
u32 GetImmLut48() const { [[nodiscard]] u32 GetImmLut48() const {
return static_cast<u32>(imm_lut48); return static_cast<u32>(imm_lut48);
} }
} lop3; } lop3;
u16 GetImm20_16() const { [[nodiscard]] u16 GetImm20_16() const {
return static_cast<u16>(imm20_16); return static_cast<u16>(imm20_16);
} }
u32 GetImm20_19() const { [[nodiscard]] u32 GetImm20_19() const {
u32 imm{static_cast<u32>(imm20_19)}; u32 imm{static_cast<u32>(imm20_19)};
imm <<= 12; imm <<= 12;
imm |= negate_imm ? 0x80000000 : 0; imm |= negate_imm ? 0x80000000 : 0;
return imm; return imm;
} }
u32 GetImm20_32() const { [[nodiscard]] u32 GetImm20_32() const {
return static_cast<u32>(imm20_32); return static_cast<u32>(imm20_32);
} }
s32 GetSignedImm20_20() const { [[nodiscard]] s32 GetSignedImm20_20() const {
u32 immediate = static_cast<u32>(imm20_19 | (negate_imm << 19)); const auto immediate = static_cast<u32>(imm20_19 | (negate_imm << 19));
// Sign extend the 20-bit value. // Sign extend the 20-bit value.
u32 mask = 1U << (20 - 1); const auto mask = 1U << (20 - 1);
return static_cast<s32>((immediate ^ mask) - mask); return static_cast<s32>((immediate ^ mask) - mask);
} }
} alu; } alu;
@ -857,7 +857,7 @@ union Instruction {
BitField<56, 1, u64> second_negate; BitField<56, 1, u64> second_negate;
BitField<30, 9, u64> second; BitField<30, 9, u64> second;
u32 PackImmediates() const { [[nodiscard]] u32 PackImmediates() const {
// Immediates are half floats shifted. // Immediates are half floats shifted.
constexpr u32 imm_shift = 6; constexpr u32 imm_shift = 6;
return static_cast<u32>((first << imm_shift) | (second << (16 + imm_shift))); return static_cast<u32>((first << imm_shift) | (second << (16 + imm_shift)));
@ -1033,7 +1033,7 @@ union Instruction {
BitField<28, 2, AtomicType> type; BitField<28, 2, AtomicType> type;
BitField<30, 22, s64> offset; BitField<30, 22, s64> offset;
s32 GetImmediateOffset() const { [[nodiscard]] s32 GetImmediateOffset() const {
return static_cast<s32>(offset << 2); return static_cast<s32>(offset << 2);
} }
} atoms; } atoms;
@ -1215,7 +1215,7 @@ union Instruction {
BitField<39, 4, u64> rounding; BitField<39, 4, u64> rounding;
// H0, H1 extract for F16 missing // H0, H1 extract for F16 missing
BitField<41, 1, u64> selector; // Guessed as some games set it, TODO: reverse this value BitField<41, 1, u64> selector; // Guessed as some games set it, TODO: reverse this value
F2fRoundingOp GetRoundingMode() const { [[nodiscard]] F2fRoundingOp GetRoundingMode() const {
constexpr u64 rounding_mask = 0x0B; constexpr u64 rounding_mask = 0x0B;
return static_cast<F2fRoundingOp>(rounding.Value() & rounding_mask); return static_cast<F2fRoundingOp>(rounding.Value() & rounding_mask);
} }
@ -1239,15 +1239,15 @@ union Instruction {
BitField<54, 1, u64> aoffi_flag; BitField<54, 1, u64> aoffi_flag;
BitField<55, 3, TextureProcessMode> process_mode; BitField<55, 3, TextureProcessMode> process_mode;
bool IsComponentEnabled(std::size_t component) const { [[nodiscard]] bool IsComponentEnabled(std::size_t component) const {
return ((1ull << component) & component_mask) != 0; return ((1ULL << component) & component_mask) != 0;
} }
TextureProcessMode GetTextureProcessMode() const { [[nodiscard]] TextureProcessMode GetTextureProcessMode() const {
return process_mode; return process_mode;
} }
bool UsesMiscMode(TextureMiscMode mode) const { [[nodiscard]] bool UsesMiscMode(TextureMiscMode mode) const {
switch (mode) { switch (mode) {
case TextureMiscMode::DC: case TextureMiscMode::DC:
return dc_flag != 0; return dc_flag != 0;
@ -1271,15 +1271,15 @@ union Instruction {
BitField<36, 1, u64> aoffi_flag; BitField<36, 1, u64> aoffi_flag;
BitField<37, 3, TextureProcessMode> process_mode; BitField<37, 3, TextureProcessMode> process_mode;
bool IsComponentEnabled(std::size_t component) const { [[nodiscard]] bool IsComponentEnabled(std::size_t component) const {
return ((1ULL << component) & component_mask) != 0; return ((1ULL << component) & component_mask) != 0;
} }
TextureProcessMode GetTextureProcessMode() const { [[nodiscard]] TextureProcessMode GetTextureProcessMode() const {
return process_mode; return process_mode;
} }
bool UsesMiscMode(TextureMiscMode mode) const { [[nodiscard]] bool UsesMiscMode(TextureMiscMode mode) const {
switch (mode) { switch (mode) {
case TextureMiscMode::DC: case TextureMiscMode::DC:
return dc_flag != 0; return dc_flag != 0;
@ -1299,7 +1299,7 @@ union Instruction {
BitField<31, 4, u64> component_mask; BitField<31, 4, u64> component_mask;
BitField<49, 1, u64> nodep_flag; BitField<49, 1, u64> nodep_flag;
bool UsesMiscMode(TextureMiscMode mode) const { [[nodiscard]] bool UsesMiscMode(TextureMiscMode mode) const {
switch (mode) { switch (mode) {
case TextureMiscMode::NODEP: case TextureMiscMode::NODEP:
return nodep_flag != 0; return nodep_flag != 0;
@ -1309,7 +1309,7 @@ union Instruction {
return false; return false;
} }
bool IsComponentEnabled(std::size_t component) const { [[nodiscard]] bool IsComponentEnabled(std::size_t component) const {
return ((1ULL << component) & component_mask) != 0; return ((1ULL << component) & component_mask) != 0;
} }
} txq; } txq;
@ -1321,11 +1321,11 @@ union Instruction {
BitField<35, 1, u64> ndv_flag; BitField<35, 1, u64> ndv_flag;
BitField<49, 1, u64> nodep_flag; BitField<49, 1, u64> nodep_flag;
bool IsComponentEnabled(std::size_t component) const { [[nodiscard]] bool IsComponentEnabled(std::size_t component) const {
return ((1ull << component) & component_mask) != 0; return ((1ULL << component) & component_mask) != 0;
} }
bool UsesMiscMode(TextureMiscMode mode) const { [[nodiscard]] bool UsesMiscMode(TextureMiscMode mode) const {
switch (mode) { switch (mode) {
case TextureMiscMode::NDV: case TextureMiscMode::NDV:
return (ndv_flag != 0); return (ndv_flag != 0);
@ -1347,7 +1347,7 @@ union Instruction {
BitField<54, 2, u64> offset_mode; BitField<54, 2, u64> offset_mode;
BitField<56, 2, u64> component; BitField<56, 2, u64> component;
bool UsesMiscMode(TextureMiscMode mode) const { [[nodiscard]] bool UsesMiscMode(TextureMiscMode mode) const {
switch (mode) { switch (mode) {
case TextureMiscMode::NDV: case TextureMiscMode::NDV:
return ndv_flag != 0; return ndv_flag != 0;
@ -1373,7 +1373,7 @@ union Instruction {
BitField<33, 2, u64> offset_mode; BitField<33, 2, u64> offset_mode;
BitField<37, 2, u64> component; BitField<37, 2, u64> component;
bool UsesMiscMode(TextureMiscMode mode) const { [[nodiscard]] bool UsesMiscMode(TextureMiscMode mode) const {
switch (mode) { switch (mode) {
case TextureMiscMode::NDV: case TextureMiscMode::NDV:
return ndv_flag != 0; return ndv_flag != 0;
@ -1399,7 +1399,7 @@ union Instruction {
BitField<52, 2, u64> component; BitField<52, 2, u64> component;
BitField<55, 1, u64> fp16_flag; BitField<55, 1, u64> fp16_flag;
bool UsesMiscMode(TextureMiscMode mode) const { [[nodiscard]] bool UsesMiscMode(TextureMiscMode mode) const {
switch (mode) { switch (mode) {
case TextureMiscMode::DC: case TextureMiscMode::DC:
return dc_flag != 0; return dc_flag != 0;
@ -1422,16 +1422,20 @@ union Instruction {
BitField<53, 4, u64> texture_info; BitField<53, 4, u64> texture_info;
BitField<59, 1, u64> fp32_flag; BitField<59, 1, u64> fp32_flag;
TextureType GetTextureType() const { [[nodiscard]] TextureType GetTextureType() const {
// The TEXS instruction has a weird encoding for the texture type. // The TEXS instruction has a weird encoding for the texture type.
if (texture_info == 0) if (texture_info == 0) {
return TextureType::Texture1D; return TextureType::Texture1D;
if (texture_info >= 1 && texture_info <= 9) }
if (texture_info >= 1 && texture_info <= 9) {
return TextureType::Texture2D; return TextureType::Texture2D;
if (texture_info >= 10 && texture_info <= 11) }
if (texture_info >= 10 && texture_info <= 11) {
return TextureType::Texture3D; return TextureType::Texture3D;
if (texture_info >= 12 && texture_info <= 13) }
if (texture_info >= 12 && texture_info <= 13) {
return TextureType::TextureCube; return TextureType::TextureCube;
}
LOG_CRITICAL(HW_GPU, "Unhandled texture_info: {}", LOG_CRITICAL(HW_GPU, "Unhandled texture_info: {}",
static_cast<u32>(texture_info.Value())); static_cast<u32>(texture_info.Value()));
@ -1439,7 +1443,7 @@ union Instruction {
return TextureType::Texture1D; return TextureType::Texture1D;
} }
TextureProcessMode GetTextureProcessMode() const { [[nodiscard]] TextureProcessMode GetTextureProcessMode() const {
switch (texture_info) { switch (texture_info) {
case 0: case 0:
case 2: case 2:
@ -1458,7 +1462,7 @@ union Instruction {
return TextureProcessMode::None; return TextureProcessMode::None;
} }
bool UsesMiscMode(TextureMiscMode mode) const { [[nodiscard]] bool UsesMiscMode(TextureMiscMode mode) const {
switch (mode) { switch (mode) {
case TextureMiscMode::DC: case TextureMiscMode::DC:
return (texture_info >= 4 && texture_info <= 6) || texture_info == 9; return (texture_info >= 4 && texture_info <= 6) || texture_info == 9;
@ -1470,16 +1474,16 @@ union Instruction {
return false; return false;
} }
bool IsArrayTexture() const { [[nodiscard]] bool IsArrayTexture() const {
// TEXS only supports Texture2D arrays. // TEXS only supports Texture2D arrays.
return texture_info >= 7 && texture_info <= 9; return texture_info >= 7 && texture_info <= 9;
} }
bool HasTwoDestinations() const { [[nodiscard]] bool HasTwoDestinations() const {
return gpr28.Value() != Register::ZeroIndex; return gpr28.Value() != Register::ZeroIndex;
} }
bool IsComponentEnabled(std::size_t component) const { [[nodiscard]] bool IsComponentEnabled(std::size_t component) const {
static constexpr std::array<std::array<u32, 8>, 4> mask_lut{{ static constexpr std::array<std::array<u32, 8>, 4> mask_lut{{
{}, {},
{0x1, 0x2, 0x4, 0x8, 0x3, 0x9, 0xa, 0xc}, {0x1, 0x2, 0x4, 0x8, 0x3, 0x9, 0xa, 0xc},
@ -1506,7 +1510,7 @@ union Instruction {
BitField<54, 1, u64> cl; BitField<54, 1, u64> cl;
BitField<55, 1, u64> process_mode; BitField<55, 1, u64> process_mode;
TextureProcessMode GetTextureProcessMode() const { [[nodiscard]] TextureProcessMode GetTextureProcessMode() const {
return process_mode == 0 ? TextureProcessMode::LZ : TextureProcessMode::LL; return process_mode == 0 ? TextureProcessMode::LZ : TextureProcessMode::LL;
} }
} tld; } tld;
@ -1516,7 +1520,7 @@ union Instruction {
BitField<53, 4, u64> texture_info; BitField<53, 4, u64> texture_info;
BitField<59, 1, u64> fp32_flag; BitField<59, 1, u64> fp32_flag;
TextureType GetTextureType() const { [[nodiscard]] TextureType GetTextureType() const {
// The TLDS instruction has a weird encoding for the texture type. // The TLDS instruction has a weird encoding for the texture type.
if (texture_info <= 1) { if (texture_info <= 1) {
return TextureType::Texture1D; return TextureType::Texture1D;
@ -1535,13 +1539,14 @@ union Instruction {
return TextureType::Texture1D; return TextureType::Texture1D;
} }
TextureProcessMode GetTextureProcessMode() const { [[nodiscard]] TextureProcessMode GetTextureProcessMode() const {
if (texture_info == 1 || texture_info == 5 || texture_info == 12) if (texture_info == 1 || texture_info == 5 || texture_info == 12) {
return TextureProcessMode::LL; return TextureProcessMode::LL;
}
return TextureProcessMode::LZ; return TextureProcessMode::LZ;
} }
bool UsesMiscMode(TextureMiscMode mode) const { [[nodiscard]] bool UsesMiscMode(TextureMiscMode mode) const {
switch (mode) { switch (mode) {
case TextureMiscMode::AOFFI: case TextureMiscMode::AOFFI:
return texture_info == 12 || texture_info == 4; return texture_info == 12 || texture_info == 4;
@ -1555,7 +1560,7 @@ union Instruction {
return false; return false;
} }
bool IsArrayTexture() const { [[nodiscard]] bool IsArrayTexture() const {
// TEXS only supports Texture2D arrays. // TEXS only supports Texture2D arrays.
return texture_info == 8; return texture_info == 8;
} }
@ -1567,7 +1572,7 @@ union Instruction {
BitField<35, 1, u64> aoffi_flag; BitField<35, 1, u64> aoffi_flag;
BitField<49, 1, u64> nodep_flag; BitField<49, 1, u64> nodep_flag;
bool UsesMiscMode(TextureMiscMode mode) const { [[nodiscard]] bool UsesMiscMode(TextureMiscMode mode) const {
switch (mode) { switch (mode) {
case TextureMiscMode::AOFFI: case TextureMiscMode::AOFFI:
return aoffi_flag != 0; return aoffi_flag != 0;
@ -1591,7 +1596,7 @@ union Instruction {
BitField<20, 3, StoreType> store_data_layout; BitField<20, 3, StoreType> store_data_layout;
BitField<20, 4, u64> component_mask_selector; BitField<20, 4, u64> component_mask_selector;
bool IsComponentEnabled(std::size_t component) const { [[nodiscard]] bool IsComponentEnabled(std::size_t component) const {
ASSERT(mode == SurfaceDataMode::P); ASSERT(mode == SurfaceDataMode::P);
constexpr u8 R = 0b0001; constexpr u8 R = 0b0001;
constexpr u8 G = 0b0010; constexpr u8 G = 0b0010;
@ -1604,7 +1609,7 @@ union Instruction {
return std::bitset<4>{mask.at(component_mask_selector)}.test(component); return std::bitset<4>{mask.at(component_mask_selector)}.test(component);
} }
StoreType GetStoreDataLayout() const { [[nodiscard]] StoreType GetStoreDataLayout() const {
ASSERT(mode == SurfaceDataMode::D_BA); ASSERT(mode == SurfaceDataMode::D_BA);
return store_data_layout; return store_data_layout;
} }
@ -1622,7 +1627,7 @@ union Instruction {
BitField<20, 24, u64> target; BitField<20, 24, u64> target;
BitField<5, 1, u64> constant_buffer; BitField<5, 1, u64> constant_buffer;
s32 GetBranchTarget() const { [[nodiscard]] s32 GetBranchTarget() const {
// Sign extend the branch target offset // Sign extend the branch target offset
const auto mask = 1U << (24 - 1); const auto mask = 1U << (24 - 1);
const auto target_value = static_cast<u32>(target); const auto target_value = static_cast<u32>(target);
@ -1638,7 +1643,7 @@ union Instruction {
BitField<20, 24, u64> target; BitField<20, 24, u64> target;
BitField<5, 1, u64> constant_buffer; BitField<5, 1, u64> constant_buffer;
s32 GetBranchExtend() const { [[nodiscard]] s32 GetBranchExtend() const {
// Sign extend the branch target offset // Sign extend the branch target offset
const auto mask = 1U << (24 - 1); const auto mask = 1U << (24 - 1);
const auto target_value = static_cast<u32>(target); const auto target_value = static_cast<u32>(target);
@ -1699,7 +1704,7 @@ union Instruction {
BitField<50, 1, u64> is_op_b_register; BitField<50, 1, u64> is_op_b_register;
BitField<51, 3, VmnmxOperation> operation; BitField<51, 3, VmnmxOperation> operation;
VmnmxType SourceFormatA() const { [[nodiscard]] VmnmxType SourceFormatA() const {
switch (src_format_a) { switch (src_format_a) {
case 0b11: case 0b11:
return VmnmxType::Bits32; return VmnmxType::Bits32;
@ -1710,7 +1715,7 @@ union Instruction {
} }
} }
VmnmxType SourceFormatB() const { [[nodiscard]] VmnmxType SourceFormatB() const {
switch (src_format_b) { switch (src_format_b) {
case 0b11: case 0b11:
return VmnmxType::Bits32; return VmnmxType::Bits32;
@ -1741,7 +1746,7 @@ union Instruction {
BitField<20, 14, u64> shifted_offset; BitField<20, 14, u64> shifted_offset;
BitField<34, 5, u64> index; BitField<34, 5, u64> index;
u64 GetOffset() const { [[nodiscard]] u64 GetOffset() const {
return shifted_offset * 4; return shifted_offset * 4;
} }
} cbuf34; } cbuf34;
@ -1750,7 +1755,7 @@ union Instruction {
BitField<20, 16, s64> offset; BitField<20, 16, s64> offset;
BitField<36, 5, u64> index; BitField<36, 5, u64> index;
s64 GetOffset() const { [[nodiscard]] s64 GetOffset() const {
return offset; return offset;
} }
} cbuf36; } cbuf36;
@ -1999,7 +2004,7 @@ public:
/// Returns whether an opcode has an execution predicate field or not (ie, whether it can be /// Returns whether an opcode has an execution predicate field or not (ie, whether it can be
/// conditionally executed). /// conditionally executed).
static bool IsPredicatedInstruction(Id opcode) { [[nodiscard]] static bool IsPredicatedInstruction(Id opcode) {
// TODO(Subv): Add the rest of unpredicated instructions. // TODO(Subv): Add the rest of unpredicated instructions.
return opcode != Id::SSY && opcode != Id::PBK; return opcode != Id::SSY && opcode != Id::PBK;
} }
@ -2009,19 +2014,19 @@ public:
constexpr Matcher(const char* const name_, u16 mask_, u16 expected_, Id id_, Type type_) constexpr Matcher(const char* const name_, u16 mask_, u16 expected_, Id id_, Type type_)
: name{name_}, mask{mask_}, expected{expected_}, id{id_}, type{type_} {} : name{name_}, mask{mask_}, expected{expected_}, id{id_}, type{type_} {}
constexpr const char* GetName() const { [[nodiscard]] constexpr const char* GetName() const {
return name; return name;
} }
constexpr u16 GetMask() const { [[nodiscard]] constexpr u16 GetMask() const {
return mask; return mask;
} }
constexpr Id GetId() const { [[nodiscard]] constexpr Id GetId() const {
return id; return id;
} }
constexpr Type GetType() const { [[nodiscard]] constexpr Type GetType() const {
return type; return type;
} }
@ -2030,7 +2035,7 @@ public:
* @param instruction The instruction to test * @param instruction The instruction to test
* @returns true if the given instruction matches. * @returns true if the given instruction matches.
*/ */
constexpr bool Matches(u16 instruction) const { [[nodiscard]] constexpr bool Matches(u16 instruction) const {
return (instruction & mask) == expected; return (instruction & mask) == expected;
} }
@ -2042,7 +2047,8 @@ public:
Type type; Type type;
}; };
static std::optional<std::reference_wrapper<const Matcher>> Decode(Instruction instr) { using DecodeResult = std::optional<std::reference_wrapper<const Matcher>>;
[[nodiscard]] static DecodeResult Decode(Instruction instr) {
static const auto table{GetDecodeTable()}; static const auto table{GetDecodeTable()};
const auto matches_instruction = [instr](const auto& matcher) { const auto matches_instruction = [instr](const auto& matcher) {
@ -2064,7 +2070,7 @@ private:
* A '0' in a bitstring indicates that a zero must be present at that bit position. * A '0' in a bitstring indicates that a zero must be present at that bit position.
* A '1' in a bitstring indicates that a one must be present at that bit position. * A '1' in a bitstring indicates that a one must be present at that bit position.
*/ */
static constexpr auto GetMaskAndExpect(const char* const bitstring) { [[nodiscard]] static constexpr auto GetMaskAndExpect(const char* const bitstring) {
u16 mask = 0, expect = 0; u16 mask = 0, expect = 0;
for (std::size_t i = 0; i < opcode_bitsize; i++) { for (std::size_t i = 0; i < opcode_bitsize; i++) {
const std::size_t bit_position = opcode_bitsize - i - 1; const std::size_t bit_position = opcode_bitsize - i - 1;
@ -2086,14 +2092,14 @@ private:
public: public:
/// Creates a matcher that can match and parse instructions based on bitstring. /// Creates a matcher that can match and parse instructions based on bitstring.
static constexpr auto GetMatcher(const char* const bitstring, Id op, Type type, [[nodiscard]] static constexpr auto GetMatcher(const char* const bitstring, Id op,
const char* const name) { Type type, const char* const name) {
const auto [mask, expected] = GetMaskAndExpect(bitstring); const auto [mask, expected] = GetMaskAndExpect(bitstring);
return Matcher(name, mask, expected, op, type); return Matcher(name, mask, expected, op, type);
} }
}; };
static std::vector<Matcher> GetDecodeTable() { [[nodiscard]] static std::vector<Matcher> GetDecodeTable() {
std::vector<Matcher> table = { std::vector<Matcher> table = {
#define INST(bitstring, op, type, name) Detail::GetMatcher(bitstring, op, type, name) #define INST(bitstring, op, type, name) Detail::GetMatcher(bitstring, op, type, name)
INST("111000110011----", Id::KIL, Type::Flow, "KIL"), INST("111000110011----", Id::KIL, Type::Flow, "KIL"),