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llvm-project/clang/utils/TableGen/RISCVVEmitter.cpp

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//===- RISCVVEmitter.cpp - Generate riscv_vector.h for use with clang -----===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
//
// This tablegen backend is responsible for emitting riscv_vector.h which
// includes a declaration and definition of each intrinsic functions specified
// in https://github.com/riscv/rvv-intrinsic-doc.
//
// See also the documentation in include/clang/Basic/riscv_vector.td.
//
//===----------------------------------------------------------------------===//
#include "llvm/ADT/ArrayRef.h"
#include "llvm/ADT/SmallSet.h"
#include "llvm/ADT/StringExtras.h"
#include "llvm/ADT/StringMap.h"
#include "llvm/ADT/StringSet.h"
#include "llvm/ADT/Twine.h"
#include "llvm/TableGen/Error.h"
#include "llvm/TableGen/Record.h"
#include <numeric>
using namespace llvm;
using BasicType = char;
using VScaleVal = Optional<unsigned>;
namespace {
// Exponential LMUL
struct LMULType {
int Log2LMUL;
LMULType(int Log2LMUL);
// Return the C/C++ string representation of LMUL
std::string str() const;
Optional<unsigned> getScale(unsigned ElementBitwidth) const;
void MulLog2LMUL(int Log2LMUL);
LMULType &operator*=(uint32_t RHS);
};
// This class is compact representation of a valid and invalid RVVType.
class RVVType {
enum ScalarTypeKind : uint32_t {
Void,
Size_t,
Ptrdiff_t,
UnsignedLong,
SignedLong,
Boolean,
SignedInteger,
UnsignedInteger,
Float,
Invalid,
};
BasicType BT;
ScalarTypeKind ScalarType = Invalid;
LMULType LMUL;
bool IsPointer = false;
// IsConstant indices are "int", but have the constant expression.
bool IsImmediate = false;
// Const qualifier for pointer to const object or object of const type.
bool IsConstant = false;
unsigned ElementBitwidth = 0;
VScaleVal Scale = 0;
bool Valid;
std::string BuiltinStr;
std::string ClangBuiltinStr;
std::string Str;
std::string ShortStr;
public:
RVVType() : RVVType(BasicType(), 0, StringRef()) {}
RVVType(BasicType BT, int Log2LMUL, StringRef prototype);
// Return the string representation of a type, which is an encoded string for
// passing to the BUILTIN() macro in Builtins.def.
const std::string &getBuiltinStr() const { return BuiltinStr; }
// Return the clang builtin type for RVV vector type which are used in the
// riscv_vector.h header file.
const std::string &getClangBuiltinStr() const { return ClangBuiltinStr; }
// Return the C/C++ string representation of a type for use in the
// riscv_vector.h header file.
const std::string &getTypeStr() const { return Str; }
// Return the short name of a type for C/C++ name suffix.
const std::string &getShortStr() {
// Not all types are used in short name, so compute the short name by
// demanded.
if (ShortStr.empty())
initShortStr();
return ShortStr;
}
bool isValid() const { return Valid; }
bool isScalar() const { return Scale.hasValue() && Scale.getValue() == 0; }
bool isVector() const { return Scale.hasValue() && Scale.getValue() != 0; }
bool isVector(unsigned Width) const {
return isVector() && ElementBitwidth == Width;
}
bool isFloat() const { return ScalarType == ScalarTypeKind::Float; }
bool isSignedInteger() const {
return ScalarType == ScalarTypeKind::SignedInteger;
}
bool isFloatVector(unsigned Width) const {
return isVector() && isFloat() && ElementBitwidth == Width;
}
bool isFloat(unsigned Width) const {
return isFloat() && ElementBitwidth == Width;
}
private:
// Verify RVV vector type and set Valid.
bool verifyType() const;
// Creates a type based on basic types of TypeRange
void applyBasicType();
// Applies a prototype modifier to the current type. The result maybe an
// invalid type.
void applyModifier(StringRef prototype);
// Compute and record a string for legal type.
void initBuiltinStr();
// Compute and record a builtin RVV vector type string.
void initClangBuiltinStr();
// Compute and record a type string for used in the header.
void initTypeStr();
// Compute and record a short name of a type for C/C++ name suffix.
void initShortStr();
};
using RVVTypePtr = RVVType *;
using RVVTypes = std::vector<RVVTypePtr>;
using RISCVPredefinedMacroT = uint8_t;
enum RISCVPredefinedMacro : RISCVPredefinedMacroT {
Basic = 0,
Zfh = 1 << 1,
RV64 = 1 << 2,
VectorMaxELen64 = 1 << 3,
VectorMaxELenFp32 = 1 << 4,
VectorMaxELenFp64 = 1 << 5,
};
// TODO refactor RVVIntrinsic class design after support all intrinsic
// combination. This represents an instantiation of an intrinsic with a
// particular type and prototype
class RVVIntrinsic {
private:
std::string BuiltinName; // Builtin name
std::string Name; // C intrinsic name.
std::string MangledName;
std::string IRName;
bool IsMask;
bool HasVL;
bool HasPolicy;
bool HasNoMaskedOverloaded;
bool HasAutoDef; // There is automiatic definition in header
std::string ManualCodegen;
RVVTypePtr OutputType; // Builtin output type
RVVTypes InputTypes; // Builtin input types
// The types we use to obtain the specific LLVM intrinsic. They are index of
// InputTypes. -1 means the return type.
std::vector<int64_t> IntrinsicTypes;
RISCVPredefinedMacroT RISCVPredefinedMacros = 0;
unsigned NF = 1;
public:
RVVIntrinsic(StringRef Name, StringRef Suffix, StringRef MangledName,
StringRef MangledSuffix, StringRef IRName, bool IsMask,
bool HasMaskedOffOperand, bool HasVL, bool HasPolicy,
bool HasNoMaskedOverloaded, bool HasAutoDef,
StringRef ManualCodegen, const RVVTypes &Types,
const std::vector<int64_t> &IntrinsicTypes,
const std::vector<StringRef> &RequiredExtensions, unsigned NF);
~RVVIntrinsic() = default;
StringRef getBuiltinName() const { return BuiltinName; }
StringRef getName() const { return Name; }
StringRef getMangledName() const { return MangledName; }
bool hasVL() const { return HasVL; }
bool hasPolicy() const { return HasPolicy; }
bool hasNoMaskedOverloaded() const { return HasNoMaskedOverloaded; }
bool hasManualCodegen() const { return !ManualCodegen.empty(); }
bool hasAutoDef() const { return HasAutoDef; }
bool isMask() const { return IsMask; }
StringRef getIRName() const { return IRName; }
StringRef getManualCodegen() const { return ManualCodegen; }
RISCVPredefinedMacroT getRISCVPredefinedMacros() const {
return RISCVPredefinedMacros;
}
unsigned getNF() const { return NF; }
const std::vector<int64_t> &getIntrinsicTypes() const {
return IntrinsicTypes;
}
// Return the type string for a BUILTIN() macro in Builtins.def.
std::string getBuiltinTypeStr() const;
// Emit the code block for switch body in EmitRISCVBuiltinExpr, it should
// init the RVVIntrinsic ID and IntrinsicTypes.
void emitCodeGenSwitchBody(raw_ostream &o) const;
// Emit the macros for mapping C/C++ intrinsic function to builtin functions.
void emitIntrinsicFuncDef(raw_ostream &o) const;
// Emit the mangled function definition.
void emitMangledFuncDef(raw_ostream &o) const;
};
class RVVEmitter {
private:
RecordKeeper &Records;
std::string HeaderCode;
// Concat BasicType, LMUL and Proto as key
StringMap<RVVType> LegalTypes;
StringSet<> IllegalTypes;
public:
RVVEmitter(RecordKeeper &R) : Records(R) {}
/// Emit riscv_vector.h
void createHeader(raw_ostream &o);
/// Emit all the __builtin prototypes and code needed by Sema.
void createBuiltins(raw_ostream &o);
/// Emit all the information needed to map builtin -> LLVM IR intrinsic.
void createCodeGen(raw_ostream &o);
std::string getSuffixStr(char Type, int Log2LMUL, StringRef Prototypes);
private:
/// Create all intrinsics and add them to \p Out
void createRVVIntrinsics(std::vector<std::unique_ptr<RVVIntrinsic>> &Out);
/// Create Headers and add them to \p Out
void createRVVHeaders(raw_ostream &OS);
/// Compute output and input types by applying different config (basic type
/// and LMUL with type transformers). It also record result of type in legal
/// or illegal set to avoid compute the same config again. The result maybe
/// have illegal RVVType.
Optional<RVVTypes> computeTypes(BasicType BT, int Log2LMUL, unsigned NF,
ArrayRef<std::string> PrototypeSeq);
Optional<RVVTypePtr> computeType(BasicType BT, int Log2LMUL, StringRef Proto);
/// Emit Acrh predecessor definitions and body, assume the element of Defs are
/// sorted by extension.
void emitArchMacroAndBody(
std::vector<std::unique_ptr<RVVIntrinsic>> &Defs, raw_ostream &o,
std::function<void(raw_ostream &, const RVVIntrinsic &)>);
// Emit the architecture preprocessor definitions. Return true when emits
// non-empty string.
bool emitMacroRestrictionStr(RISCVPredefinedMacroT PredefinedMacros,
raw_ostream &o);
// Slice Prototypes string into sub prototype string and process each sub
// prototype string individually in the Handler.
void parsePrototypes(StringRef Prototypes,
std::function<void(StringRef)> Handler);
};
} // namespace
//===----------------------------------------------------------------------===//
// Type implementation
//===----------------------------------------------------------------------===//
LMULType::LMULType(int NewLog2LMUL) {
// Check Log2LMUL is -3, -2, -1, 0, 1, 2, 3
assert(NewLog2LMUL <= 3 && NewLog2LMUL >= -3 && "Bad LMUL number!");
Log2LMUL = NewLog2LMUL;
}
std::string LMULType::str() const {
if (Log2LMUL < 0)
return "mf" + utostr(1ULL << (-Log2LMUL));
return "m" + utostr(1ULL << Log2LMUL);
}
VScaleVal LMULType::getScale(unsigned ElementBitwidth) const {
int Log2ScaleResult = 0;
switch (ElementBitwidth) {
default:
break;
case 8:
Log2ScaleResult = Log2LMUL + 3;
break;
case 16:
Log2ScaleResult = Log2LMUL + 2;
break;
case 32:
Log2ScaleResult = Log2LMUL + 1;
break;
case 64:
Log2ScaleResult = Log2LMUL;
break;
}
// Illegal vscale result would be less than 1
if (Log2ScaleResult < 0)
return None;
return 1 << Log2ScaleResult;
}
void LMULType::MulLog2LMUL(int log2LMUL) { Log2LMUL += log2LMUL; }
LMULType &LMULType::operator*=(uint32_t RHS) {
assert(isPowerOf2_32(RHS));
this->Log2LMUL = this->Log2LMUL + Log2_32(RHS);
return *this;
}
RVVType::RVVType(BasicType BT, int Log2LMUL, StringRef prototype)
: BT(BT), LMUL(LMULType(Log2LMUL)) {
applyBasicType();
applyModifier(prototype);
Valid = verifyType();
if (Valid) {
initBuiltinStr();
initTypeStr();
if (isVector()) {
initClangBuiltinStr();
}
}
}
// clang-format off
// boolean type are encoded the ratio of n (SEW/LMUL)
// SEW/LMUL | 1 | 2 | 4 | 8 | 16 | 32 | 64
// c type | vbool64_t | vbool32_t | vbool16_t | vbool8_t | vbool4_t | vbool2_t | vbool1_t
// IR type | nxv1i1 | nxv2i1 | nxv4i1 | nxv8i1 | nxv16i1 | nxv32i1 | nxv64i1
// type\lmul | 1/8 | 1/4 | 1/2 | 1 | 2 | 4 | 8
// -------- |------ | -------- | ------- | ------- | -------- | -------- | --------
// i64 | N/A | N/A | N/A | nxv1i64 | nxv2i64 | nxv4i64 | nxv8i64
// i32 | N/A | N/A | nxv1i32 | nxv2i32 | nxv4i32 | nxv8i32 | nxv16i32
// i16 | N/A | nxv1i16 | nxv2i16 | nxv4i16 | nxv8i16 | nxv16i16 | nxv32i16
// i8 | nxv1i8 | nxv2i8 | nxv4i8 | nxv8i8 | nxv16i8 | nxv32i8 | nxv64i8
// double | N/A | N/A | N/A | nxv1f64 | nxv2f64 | nxv4f64 | nxv8f64
// float | N/A | N/A | nxv1f32 | nxv2f32 | nxv4f32 | nxv8f32 | nxv16f32
// half | N/A | nxv1f16 | nxv2f16 | nxv4f16 | nxv8f16 | nxv16f16 | nxv32f16
// clang-format on
bool RVVType::verifyType() const {
if (ScalarType == Invalid)
return false;
if (isScalar())
return true;
if (!Scale.hasValue())
return false;
if (isFloat() && ElementBitwidth == 8)
return false;
unsigned V = Scale.getValue();
switch (ElementBitwidth) {
case 1:
case 8:
// Check Scale is 1,2,4,8,16,32,64
return (V <= 64 && isPowerOf2_32(V));
case 16:
// Check Scale is 1,2,4,8,16,32
return (V <= 32 && isPowerOf2_32(V));
case 32:
// Check Scale is 1,2,4,8,16
return (V <= 16 && isPowerOf2_32(V));
case 64:
// Check Scale is 1,2,4,8
return (V <= 8 && isPowerOf2_32(V));
}
return false;
}
void RVVType::initBuiltinStr() {
assert(isValid() && "RVVType is invalid");
switch (ScalarType) {
case ScalarTypeKind::Void:
BuiltinStr = "v";
return;
case ScalarTypeKind::Size_t:
BuiltinStr = "z";
if (IsImmediate)
BuiltinStr = "I" + BuiltinStr;
if (IsPointer)
BuiltinStr += "*";
return;
case ScalarTypeKind::Ptrdiff_t:
BuiltinStr = "Y";
return;
case ScalarTypeKind::UnsignedLong:
BuiltinStr = "ULi";
return;
case ScalarTypeKind::SignedLong:
BuiltinStr = "Li";
return;
case ScalarTypeKind::Boolean:
assert(ElementBitwidth == 1);
BuiltinStr += "b";
break;
case ScalarTypeKind::SignedInteger:
case ScalarTypeKind::UnsignedInteger:
switch (ElementBitwidth) {
case 8:
BuiltinStr += "c";
break;
case 16:
BuiltinStr += "s";
break;
case 32:
BuiltinStr += "i";
break;
case 64:
BuiltinStr += "Wi";
break;
default:
llvm_unreachable("Unhandled ElementBitwidth!");
}
if (isSignedInteger())
BuiltinStr = "S" + BuiltinStr;
else
BuiltinStr = "U" + BuiltinStr;
break;
case ScalarTypeKind::Float:
switch (ElementBitwidth) {
case 16:
BuiltinStr += "x";
break;
case 32:
BuiltinStr += "f";
break;
case 64:
BuiltinStr += "d";
break;
default:
llvm_unreachable("Unhandled ElementBitwidth!");
}
break;
default:
llvm_unreachable("ScalarType is invalid!");
}
if (IsImmediate)
BuiltinStr = "I" + BuiltinStr;
if (isScalar()) {
if (IsConstant)
BuiltinStr += "C";
if (IsPointer)
BuiltinStr += "*";
return;
}
BuiltinStr = "q" + utostr(Scale.getValue()) + BuiltinStr;
// Pointer to vector types. Defined for segment load intrinsics.
// segment load intrinsics have pointer type arguments to store the loaded
// vector values.
if (IsPointer)
BuiltinStr += "*";
}
void RVVType::initClangBuiltinStr() {
assert(isValid() && "RVVType is invalid");
assert(isVector() && "Handle Vector type only");
ClangBuiltinStr = "__rvv_";
switch (ScalarType) {
case ScalarTypeKind::Boolean:
ClangBuiltinStr += "bool" + utostr(64 / Scale.getValue()) + "_t";
return;
case ScalarTypeKind::Float:
ClangBuiltinStr += "float";
break;
case ScalarTypeKind::SignedInteger:
ClangBuiltinStr += "int";
break;
case ScalarTypeKind::UnsignedInteger:
ClangBuiltinStr += "uint";
break;
default:
llvm_unreachable("ScalarTypeKind is invalid");
}
ClangBuiltinStr += utostr(ElementBitwidth) + LMUL.str() + "_t";
}
void RVVType::initTypeStr() {
assert(isValid() && "RVVType is invalid");
if (IsConstant)
Str += "const ";
auto getTypeString = [&](StringRef TypeStr) {
if (isScalar())
return Twine(TypeStr + Twine(ElementBitwidth) + "_t").str();
return Twine("v" + TypeStr + Twine(ElementBitwidth) + LMUL.str() + "_t")
.str();
};
switch (ScalarType) {
case ScalarTypeKind::Void:
Str = "void";
return;
case ScalarTypeKind::Size_t:
Str = "size_t";
if (IsPointer)
Str += " *";
return;
case ScalarTypeKind::Ptrdiff_t:
Str = "ptrdiff_t";
return;
case ScalarTypeKind::UnsignedLong:
Str = "unsigned long";
return;
case ScalarTypeKind::SignedLong:
Str = "long";
return;
case ScalarTypeKind::Boolean:
if (isScalar())
Str += "bool";
else
// Vector bool is special case, the formulate is
// `vbool<N>_t = MVT::nxv<64/N>i1` ex. vbool16_t = MVT::4i1
Str += "vbool" + utostr(64 / Scale.getValue()) + "_t";
break;
case ScalarTypeKind::Float:
if (isScalar()) {
if (ElementBitwidth == 64)
Str += "double";
else if (ElementBitwidth == 32)
Str += "float";
else if (ElementBitwidth == 16)
Str += "_Float16";
else
llvm_unreachable("Unhandled floating type.");
} else
Str += getTypeString("float");
break;
case ScalarTypeKind::SignedInteger:
Str += getTypeString("int");
break;
case ScalarTypeKind::UnsignedInteger:
Str += getTypeString("uint");
break;
default:
llvm_unreachable("ScalarType is invalid!");
}
if (IsPointer)
Str += " *";
}
void RVVType::initShortStr() {
switch (ScalarType) {
case ScalarTypeKind::Boolean:
assert(isVector());
ShortStr = "b" + utostr(64 / Scale.getValue());
return;
case ScalarTypeKind::Float:
ShortStr = "f" + utostr(ElementBitwidth);
break;
case ScalarTypeKind::SignedInteger:
ShortStr = "i" + utostr(ElementBitwidth);
break;
case ScalarTypeKind::UnsignedInteger:
ShortStr = "u" + utostr(ElementBitwidth);
break;
default:
PrintFatalError("Unhandled case!");
}
if (isVector())
ShortStr += LMUL.str();
}
void RVVType::applyBasicType() {
switch (BT) {
case 'c':
ElementBitwidth = 8;
ScalarType = ScalarTypeKind::SignedInteger;
break;
case 's':
ElementBitwidth = 16;
ScalarType = ScalarTypeKind::SignedInteger;
break;
case 'i':
ElementBitwidth = 32;
ScalarType = ScalarTypeKind::SignedInteger;
break;
case 'l':
ElementBitwidth = 64;
ScalarType = ScalarTypeKind::SignedInteger;
break;
case 'x':
ElementBitwidth = 16;
ScalarType = ScalarTypeKind::Float;
break;
case 'f':
ElementBitwidth = 32;
ScalarType = ScalarTypeKind::Float;
break;
case 'd':
ElementBitwidth = 64;
ScalarType = ScalarTypeKind::Float;
break;
default:
PrintFatalError("Unhandled type code!");
}
assert(ElementBitwidth != 0 && "Bad element bitwidth!");
}
void RVVType::applyModifier(StringRef Transformer) {
if (Transformer.empty())
return;
// Handle primitive type transformer
auto PType = Transformer.back();
switch (PType) {
case 'e':
Scale = 0;
break;
case 'v':
Scale = LMUL.getScale(ElementBitwidth);
break;
case 'w':
ElementBitwidth *= 2;
LMUL *= 2;
Scale = LMUL.getScale(ElementBitwidth);
break;
case 'q':
ElementBitwidth *= 4;
LMUL *= 4;
Scale = LMUL.getScale(ElementBitwidth);
break;
case 'o':
ElementBitwidth *= 8;
LMUL *= 8;
Scale = LMUL.getScale(ElementBitwidth);
break;
case 'm':
ScalarType = ScalarTypeKind::Boolean;
Scale = LMUL.getScale(ElementBitwidth);
ElementBitwidth = 1;
break;
case '0':
ScalarType = ScalarTypeKind::Void;
break;
case 'z':
ScalarType = ScalarTypeKind::Size_t;
break;
case 't':
ScalarType = ScalarTypeKind::Ptrdiff_t;
break;
case 'u':
ScalarType = ScalarTypeKind::UnsignedLong;
break;
case 'l':
ScalarType = ScalarTypeKind::SignedLong;
break;
default:
PrintFatalError("Illegal primitive type transformers!");
}
Transformer = Transformer.drop_back();
// Extract and compute complex type transformer. It can only appear one time.
if (Transformer.startswith("(")) {
size_t Idx = Transformer.find(')');
assert(Idx != StringRef::npos);
StringRef ComplexType = Transformer.slice(1, Idx);
Transformer = Transformer.drop_front(Idx + 1);
assert(!Transformer.contains('(') &&
"Only allow one complex type transformer");
auto UpdateAndCheckComplexProto = [&]() {
Scale = LMUL.getScale(ElementBitwidth);
const StringRef VectorPrototypes("vwqom");
if (!VectorPrototypes.contains(PType))
PrintFatalError("Complex type transformer only supports vector type!");
if (Transformer.find_first_of("PCKWS") != StringRef::npos)
PrintFatalError(
"Illegal type transformer for Complex type transformer");
};
auto ComputeFixedLog2LMUL =
[&](StringRef Value,
std::function<bool(const int32_t &, const int32_t &)> Compare) {
int32_t Log2LMUL;
Value.getAsInteger(10, Log2LMUL);
if (!Compare(Log2LMUL, LMUL.Log2LMUL)) {
ScalarType = Invalid;
return false;
}
// Update new LMUL
LMUL = LMULType(Log2LMUL);
UpdateAndCheckComplexProto();
return true;
};
auto ComplexTT = ComplexType.split(":");
if (ComplexTT.first == "Log2EEW") {
uint32_t Log2EEW;
ComplexTT.second.getAsInteger(10, Log2EEW);
// update new elmul = (eew/sew) * lmul
LMUL.MulLog2LMUL(Log2EEW - Log2_32(ElementBitwidth));
// update new eew
ElementBitwidth = 1 << Log2EEW;
ScalarType = ScalarTypeKind::SignedInteger;
UpdateAndCheckComplexProto();
} else if (ComplexTT.first == "FixedSEW") {
uint32_t NewSEW;
ComplexTT.second.getAsInteger(10, NewSEW);
// Set invalid type if src and dst SEW are same.
if (ElementBitwidth == NewSEW) {
ScalarType = Invalid;
return;
}
// Update new SEW
ElementBitwidth = NewSEW;
UpdateAndCheckComplexProto();
} else if (ComplexTT.first == "LFixedLog2LMUL") {
// New LMUL should be larger than old
if (!ComputeFixedLog2LMUL(ComplexTT.second, std::greater<int32_t>()))
return;
} else if (ComplexTT.first == "SFixedLog2LMUL") {
// New LMUL should be smaller than old
if (!ComputeFixedLog2LMUL(ComplexTT.second, std::less<int32_t>()))
return;
} else {
PrintFatalError("Illegal complex type transformers!");
}
}
// Compute the remain type transformers
for (char I : Transformer) {
switch (I) {
case 'P':
if (IsConstant)
PrintFatalError("'P' transformer cannot be used after 'C'");
if (IsPointer)
PrintFatalError("'P' transformer cannot be used twice");
IsPointer = true;
break;
case 'C':
if (IsConstant)
PrintFatalError("'C' transformer cannot be used twice");
IsConstant = true;
break;
case 'K':
IsImmediate = true;
break;
case 'U':
ScalarType = ScalarTypeKind::UnsignedInteger;
break;
case 'I':
ScalarType = ScalarTypeKind::SignedInteger;
break;
case 'F':
ScalarType = ScalarTypeKind::Float;
break;
case 'S':
LMUL = LMULType(0);
// Update ElementBitwidth need to update Scale too.
Scale = LMUL.getScale(ElementBitwidth);
break;
default:
PrintFatalError("Illegal non-primitive type transformer!");
}
}
}
//===----------------------------------------------------------------------===//
// RVVIntrinsic implementation
//===----------------------------------------------------------------------===//
RVVIntrinsic::RVVIntrinsic(StringRef NewName, StringRef Suffix,
StringRef NewMangledName, StringRef MangledSuffix,
StringRef IRName, bool IsMask,
bool HasMaskedOffOperand, bool HasVL, bool HasPolicy,
bool HasNoMaskedOverloaded, bool HasAutoDef,
StringRef ManualCodegen, const RVVTypes &OutInTypes,
const std::vector<int64_t> &NewIntrinsicTypes,
const std::vector<StringRef> &RequiredExtensions,
unsigned NF)
: IRName(IRName), IsMask(IsMask), HasVL(HasVL), HasPolicy(HasPolicy),
HasNoMaskedOverloaded(HasNoMaskedOverloaded), HasAutoDef(HasAutoDef),
ManualCodegen(ManualCodegen.str()), NF(NF) {
// Init BuiltinName, Name and MangledName
BuiltinName = NewName.str();
Name = BuiltinName;
if (NewMangledName.empty())
MangledName = NewName.split("_").first.str();
else
MangledName = NewMangledName.str();
if (!Suffix.empty())
Name += "_" + Suffix.str();
if (!MangledSuffix.empty())
MangledName += "_" + MangledSuffix.str();
if (IsMask) {
BuiltinName += "_m";
Name += "_m";
}
// Init RISC-V extensions
for (const auto &T : OutInTypes) {
if (T->isFloatVector(16) || T->isFloat(16))
RISCVPredefinedMacros |= RISCVPredefinedMacro::Zfh;
if (T->isFloatVector(32))
RISCVPredefinedMacros |= RISCVPredefinedMacro::VectorMaxELenFp32;
if (T->isFloatVector(64))
RISCVPredefinedMacros |= RISCVPredefinedMacro::VectorMaxELenFp64;
if (T->isVector(64))
RISCVPredefinedMacros |= RISCVPredefinedMacro::VectorMaxELen64;
}
for (auto Extension : RequiredExtensions) {
if (Extension == "RV64")
RISCVPredefinedMacros |= RISCVPredefinedMacro::RV64;
}
// Init OutputType and InputTypes
OutputType = OutInTypes[0];
InputTypes.assign(OutInTypes.begin() + 1, OutInTypes.end());
// IntrinsicTypes is nonmasked version index. Need to update it
// if there is maskedoff operand (It is always in first operand).
IntrinsicTypes = NewIntrinsicTypes;
if (IsMask && HasMaskedOffOperand) {
for (auto &I : IntrinsicTypes) {
if (I >= 0)
I += NF;
}
}
}
std::string RVVIntrinsic::getBuiltinTypeStr() const {
std::string S;
S += OutputType->getBuiltinStr();
for (const auto &T : InputTypes) {
S += T->getBuiltinStr();
}
return S;
}
void RVVIntrinsic::emitCodeGenSwitchBody(raw_ostream &OS) const {
if (!getIRName().empty())
OS << " ID = Intrinsic::riscv_" + getIRName() + ";\n";
if (NF >= 2)
OS << " NF = " + utostr(getNF()) + ";\n";
if (hasManualCodegen()) {
OS << ManualCodegen;
OS << "break;\n";
return;
}
if (isMask()) {
if (hasVL()) {
OS << " std::rotate(Ops.begin(), Ops.begin() + 1, Ops.end() - 1);\n";
if (hasPolicy())
OS << " Ops.push_back(ConstantInt::get(Ops.back()->getType(),"
" TAIL_UNDISTURBED));\n";
} else {
OS << " std::rotate(Ops.begin(), Ops.begin() + 1, Ops.end());\n";
}
}
OS << " IntrinsicTypes = {";
ListSeparator LS;
for (const auto &Idx : IntrinsicTypes) {
if (Idx == -1)
OS << LS << "ResultType";
else
OS << LS << "Ops[" << Idx << "]->getType()";
}
// VL could be i64 or i32, need to encode it in IntrinsicTypes. VL is
// always last operand.
if (hasVL())
OS << ", Ops.back()->getType()";
OS << "};\n";
OS << " break;\n";
}
void RVVIntrinsic::emitIntrinsicFuncDef(raw_ostream &OS) const {
OS << "__attribute__((__clang_builtin_alias__(";
OS << "__builtin_rvv_" << getBuiltinName() << ")))\n";
OS << OutputType->getTypeStr() << " " << getName() << "(";
// Emit function arguments
if (!InputTypes.empty()) {
ListSeparator LS;
for (unsigned i = 0; i < InputTypes.size(); ++i)
OS << LS << InputTypes[i]->getTypeStr();
}
OS << ");\n";
}
void RVVIntrinsic::emitMangledFuncDef(raw_ostream &OS) const {
OS << "__attribute__((__clang_builtin_alias__(";
OS << "__builtin_rvv_" << getBuiltinName() << ")))\n";
OS << OutputType->getTypeStr() << " " << getMangledName() << "(";
// Emit function arguments
if (!InputTypes.empty()) {
ListSeparator LS;
for (unsigned i = 0; i < InputTypes.size(); ++i)
OS << LS << InputTypes[i]->getTypeStr();
}
OS << ");\n";
}
//===----------------------------------------------------------------------===//
// RVVEmitter implementation
//===----------------------------------------------------------------------===//
void RVVEmitter::createHeader(raw_ostream &OS) {
OS << "/*===---- riscv_vector.h - RISC-V V-extension RVVIntrinsics "
"-------------------===\n"
" *\n"
" *\n"
" * Part of the LLVM Project, under the Apache License v2.0 with LLVM "
"Exceptions.\n"
" * See https://llvm.org/LICENSE.txt for license information.\n"
" * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception\n"
" *\n"
" *===-----------------------------------------------------------------"
"------===\n"
" */\n\n";
OS << "#ifndef __RISCV_VECTOR_H\n";
OS << "#define __RISCV_VECTOR_H\n\n";
OS << "#include <stdint.h>\n";
OS << "#include <stddef.h>\n\n";
OS << "#ifndef __riscv_vector\n";
OS << "#error \"Vector intrinsics require the vector extension.\"\n";
OS << "#endif\n\n";
OS << "#ifdef __cplusplus\n";
OS << "extern \"C\" {\n";
OS << "#endif\n\n";
createRVVHeaders(OS);
std::vector<std::unique_ptr<RVVIntrinsic>> Defs;
createRVVIntrinsics(Defs);
// Print header code
if (!HeaderCode.empty()) {
OS << HeaderCode;
}
auto printType = [&](auto T) {
OS << "typedef " << T->getClangBuiltinStr() << " " << T->getTypeStr()
<< ";\n";
};
constexpr int Log2LMULs[] = {-3, -2, -1, 0, 1, 2, 3};
// Print RVV boolean types.
for (int Log2LMUL : Log2LMULs) {
auto T = computeType('c', Log2LMUL, "m");
if (T.hasValue())
printType(T.getValue());
}
// Print RVV int/float types.
for (char I : StringRef("csil")) {
for (int Log2LMUL : Log2LMULs) {
auto T = computeType(I, Log2LMUL, "v");
if (T.hasValue()) {
printType(T.getValue());
auto UT = computeType(I, Log2LMUL, "Uv");
printType(UT.getValue());
}
}
}
OS << "#if defined(__riscv_zfh)\n";
for (int Log2LMUL : Log2LMULs) {
auto T = computeType('x', Log2LMUL, "v");
if (T.hasValue())
printType(T.getValue());
}
OS << "#endif\n";
OS << "#if defined(__riscv_f)\n";
for (int Log2LMUL : Log2LMULs) {
auto T = computeType('f', Log2LMUL, "v");
if (T.hasValue())
printType(T.getValue());
}
OS << "#endif\n";
OS << "#if defined(__riscv_d)\n";
for (int Log2LMUL : Log2LMULs) {
auto T = computeType('d', Log2LMUL, "v");
if (T.hasValue())
printType(T.getValue());
}
OS << "#endif\n\n";
// The same extension include in the same arch guard marco.
llvm::stable_sort(Defs, [](const std::unique_ptr<RVVIntrinsic> &A,
const std::unique_ptr<RVVIntrinsic> &B) {
return A->getRISCVPredefinedMacros() < B->getRISCVPredefinedMacros();
});
OS << "#define __rvv_ai static __inline__\n";
// Print intrinsic functions with macro
emitArchMacroAndBody(Defs, OS, [](raw_ostream &OS, const RVVIntrinsic &Inst) {
OS << "__rvv_ai ";
Inst.emitIntrinsicFuncDef(OS);
});
OS << "#undef __rvv_ai\n\n";
OS << "#define __riscv_v_intrinsic_overloading 1\n";
// Print Overloaded APIs
OS << "#define __rvv_aio static __inline__ "
"__attribute__((__overloadable__))\n";
emitArchMacroAndBody(Defs, OS, [](raw_ostream &OS, const RVVIntrinsic &Inst) {
if (!Inst.isMask() && !Inst.hasNoMaskedOverloaded())
return;
OS << "__rvv_aio ";
Inst.emitMangledFuncDef(OS);
});
OS << "#undef __rvv_aio\n";
OS << "\n#ifdef __cplusplus\n";
OS << "}\n";
OS << "#endif // __cplusplus\n";
OS << "#endif // __RISCV_VECTOR_H\n";
}
void RVVEmitter::createBuiltins(raw_ostream &OS) {
std::vector<std::unique_ptr<RVVIntrinsic>> Defs;
createRVVIntrinsics(Defs);
// Map to keep track of which builtin names have already been emitted.
StringMap<RVVIntrinsic *> BuiltinMap;
OS << "#if defined(TARGET_BUILTIN) && !defined(RISCVV_BUILTIN)\n";
OS << "#define RISCVV_BUILTIN(ID, TYPE, ATTRS) TARGET_BUILTIN(ID, TYPE, "
"ATTRS, \"zve32x|v\")\n";
OS << "#endif\n";
for (auto &Def : Defs) {
auto P =
BuiltinMap.insert(std::make_pair(Def->getBuiltinName(), Def.get()));
if (!P.second) {
// Verify that this would have produced the same builtin definition.
if (P.first->second->hasAutoDef() != Def->hasAutoDef()) {
PrintFatalError("Builtin with same name has different hasAutoDef");
} else if (!Def->hasAutoDef() && P.first->second->getBuiltinTypeStr() !=
Def->getBuiltinTypeStr()) {
PrintFatalError("Builtin with same name has different type string");
}
continue;
}
OS << "RISCVV_BUILTIN(__builtin_rvv_" << Def->getBuiltinName() << ",\"";
if (!Def->hasAutoDef())
OS << Def->getBuiltinTypeStr();
OS << "\", \"n\")\n";
}
OS << "#undef RISCVV_BUILTIN\n";
}
void RVVEmitter::createCodeGen(raw_ostream &OS) {
std::vector<std::unique_ptr<RVVIntrinsic>> Defs;
createRVVIntrinsics(Defs);
// IR name could be empty, use the stable sort preserves the relative order.
llvm::stable_sort(Defs, [](const std::unique_ptr<RVVIntrinsic> &A,
const std::unique_ptr<RVVIntrinsic> &B) {
return A->getIRName() < B->getIRName();
});
// Map to keep track of which builtin names have already been emitted.
StringMap<RVVIntrinsic *> BuiltinMap;
// Print switch body when the ir name or ManualCodegen changes from previous
// iteration.
RVVIntrinsic *PrevDef = Defs.begin()->get();
for (auto &Def : Defs) {
StringRef CurIRName = Def->getIRName();
if (CurIRName != PrevDef->getIRName() ||
(Def->getManualCodegen() != PrevDef->getManualCodegen())) {
PrevDef->emitCodeGenSwitchBody(OS);
}
PrevDef = Def.get();
auto P =
BuiltinMap.insert(std::make_pair(Def->getBuiltinName(), Def.get()));
if (P.second) {
OS << "case RISCVVector::BI__builtin_rvv_" << Def->getBuiltinName()
<< ":\n";
continue;
}
if (P.first->second->getIRName() != Def->getIRName())
PrintFatalError("Builtin with same name has different IRName");
else if (P.first->second->getManualCodegen() != Def->getManualCodegen())
PrintFatalError("Builtin with same name has different ManualCodegen");
else if (P.first->second->getNF() != Def->getNF())
PrintFatalError("Builtin with same name has different NF");
else if (P.first->second->isMask() != Def->isMask())
PrintFatalError("Builtin with same name has different isMask");
else if (P.first->second->hasVL() != Def->hasVL())
PrintFatalError("Builtin with same name has different HasPolicy");
else if (P.first->second->hasPolicy() != Def->hasPolicy())
PrintFatalError("Builtin with same name has different HasPolicy");
else if (P.first->second->getIntrinsicTypes() != Def->getIntrinsicTypes())
PrintFatalError("Builtin with same name has different IntrinsicTypes");
}
Defs.back()->emitCodeGenSwitchBody(OS);
OS << "\n";
}
void RVVEmitter::parsePrototypes(StringRef Prototypes,
std::function<void(StringRef)> Handler) {
const StringRef Primaries("evwqom0ztul");
while (!Prototypes.empty()) {
size_t Idx = 0;
// Skip over complex prototype because it could contain primitive type
// character.
if (Prototypes[0] == '(')
Idx = Prototypes.find_first_of(')');
Idx = Prototypes.find_first_of(Primaries, Idx);
assert(Idx != StringRef::npos);
Handler(Prototypes.slice(0, Idx + 1));
Prototypes = Prototypes.drop_front(Idx + 1);
}
}
std::string RVVEmitter::getSuffixStr(char Type, int Log2LMUL,
StringRef Prototypes) {
SmallVector<std::string> SuffixStrs;
parsePrototypes(Prototypes, [&](StringRef Proto) {
auto T = computeType(Type, Log2LMUL, Proto);
SuffixStrs.push_back(T.getValue()->getShortStr());
});
return join(SuffixStrs, "_");
}
void RVVEmitter::createRVVIntrinsics(
std::vector<std::unique_ptr<RVVIntrinsic>> &Out) {
std::vector<Record *> RV = Records.getAllDerivedDefinitions("RVVBuiltin");
for (auto *R : RV) {
StringRef Name = R->getValueAsString("Name");
StringRef SuffixProto = R->getValueAsString("Suffix");
StringRef MangledName = R->getValueAsString("MangledName");
StringRef MangledSuffixProto = R->getValueAsString("MangledSuffix");
StringRef Prototypes = R->getValueAsString("Prototype");
StringRef TypeRange = R->getValueAsString("TypeRange");
bool HasMask = R->getValueAsBit("HasMask");
bool HasMaskedOffOperand = R->getValueAsBit("HasMaskedOffOperand");
bool HasVL = R->getValueAsBit("HasVL");
bool HasPolicy = R->getValueAsBit("HasPolicy");
bool HasNoMaskedOverloaded = R->getValueAsBit("HasNoMaskedOverloaded");
std::vector<int64_t> Log2LMULList = R->getValueAsListOfInts("Log2LMUL");
StringRef ManualCodegen = R->getValueAsString("ManualCodegen");
StringRef ManualCodegenMask = R->getValueAsString("ManualCodegenMask");
std::vector<int64_t> IntrinsicTypes =
R->getValueAsListOfInts("IntrinsicTypes");
std::vector<StringRef> RequiredExtensions =
R->getValueAsListOfStrings("RequiredExtensions");
StringRef IRName = R->getValueAsString("IRName");
StringRef IRNameMask = R->getValueAsString("IRNameMask");
unsigned NF = R->getValueAsInt("NF");
StringRef HeaderCodeStr = R->getValueAsString("HeaderCode");
bool HasAutoDef = HeaderCodeStr.empty();
if (!HeaderCodeStr.empty()) {
HeaderCode += HeaderCodeStr.str();
}
// Parse prototype and create a list of primitive type with transformers
// (operand) in ProtoSeq. ProtoSeq[0] is output operand.
SmallVector<std::string> ProtoSeq;
parsePrototypes(Prototypes, [&ProtoSeq](StringRef Proto) {
ProtoSeq.push_back(Proto.str());
});
// Compute Builtin types
SmallVector<std::string> ProtoMaskSeq = ProtoSeq;
if (HasMask) {
// If HasMaskedOffOperand, insert result type as first input operand.
if (HasMaskedOffOperand) {
if (NF == 1) {
ProtoMaskSeq.insert(ProtoMaskSeq.begin() + 1, ProtoSeq[0]);
} else {
// Convert
// (void, op0 address, op1 address, ...)
// to
// (void, op0 address, op1 address, ..., maskedoff0, maskedoff1, ...)
for (unsigned I = 0; I < NF; ++I)
ProtoMaskSeq.insert(
ProtoMaskSeq.begin() + NF + 1,
ProtoSeq[1].substr(1)); // Use substr(1) to skip '*'
}
}
if (HasMaskedOffOperand && NF > 1) {
// Convert
// (void, op0 address, op1 address, ..., maskedoff0, maskedoff1, ...)
// to
// (void, op0 address, op1 address, ..., mask, maskedoff0, maskedoff1,
// ...)
ProtoMaskSeq.insert(ProtoMaskSeq.begin() + NF + 1, "m");
} else {
// If HasMask, insert 'm' as first input operand.
ProtoMaskSeq.insert(ProtoMaskSeq.begin() + 1, "m");
}
}
// If HasVL, append 'z' to last operand
if (HasVL) {
ProtoSeq.push_back("z");
ProtoMaskSeq.push_back("z");
}
// Create Intrinsics for each type and LMUL.
for (char I : TypeRange) {
for (int Log2LMUL : Log2LMULList) {
Optional<RVVTypes> Types = computeTypes(I, Log2LMUL, NF, ProtoSeq);
// Ignored to create new intrinsic if there are any illegal types.
if (!Types.hasValue())
continue;
auto SuffixStr = getSuffixStr(I, Log2LMUL, SuffixProto);
auto MangledSuffixStr = getSuffixStr(I, Log2LMUL, MangledSuffixProto);
// Create a non-mask intrinsic
Out.push_back(std::make_unique<RVVIntrinsic>(
Name, SuffixStr, MangledName, MangledSuffixStr, IRName,
/*IsMask=*/false, /*HasMaskedOffOperand=*/false, HasVL, HasPolicy,
HasNoMaskedOverloaded, HasAutoDef, ManualCodegen, Types.getValue(),
IntrinsicTypes, RequiredExtensions, NF));
if (HasMask) {
// Create a mask intrinsic
Optional<RVVTypes> MaskTypes =
computeTypes(I, Log2LMUL, NF, ProtoMaskSeq);
Out.push_back(std::make_unique<RVVIntrinsic>(
Name, SuffixStr, MangledName, MangledSuffixStr, IRNameMask,
/*IsMask=*/true, HasMaskedOffOperand, HasVL, HasPolicy,
HasNoMaskedOverloaded, HasAutoDef, ManualCodegenMask,
MaskTypes.getValue(), IntrinsicTypes, RequiredExtensions, NF));
}
} // end for Log2LMULList
} // end for TypeRange
}
}
void RVVEmitter::createRVVHeaders(raw_ostream &OS) {
std::vector<Record *> RVVHeaders =
Records.getAllDerivedDefinitions("RVVHeader");
for (auto *R : RVVHeaders) {
StringRef HeaderCodeStr = R->getValueAsString("HeaderCode");
OS << HeaderCodeStr.str();
}
}
Optional<RVVTypes>
RVVEmitter::computeTypes(BasicType BT, int Log2LMUL, unsigned NF,
ArrayRef<std::string> PrototypeSeq) {
// LMUL x NF must be less than or equal to 8.
if ((Log2LMUL >= 1) && (1 << Log2LMUL) * NF > 8)
return llvm::None;
RVVTypes Types;
for (const std::string &Proto : PrototypeSeq) {
auto T = computeType(BT, Log2LMUL, Proto);
if (!T.hasValue())
return llvm::None;
// Record legal type index
Types.push_back(T.getValue());
}
return Types;
}
Optional<RVVTypePtr> RVVEmitter::computeType(BasicType BT, int Log2LMUL,
StringRef Proto) {
std::string Idx = Twine(Twine(BT) + Twine(Log2LMUL) + Proto).str();
// Search first
auto It = LegalTypes.find(Idx);
if (It != LegalTypes.end())
return &(It->second);
if (IllegalTypes.count(Idx))
return llvm::None;
// Compute type and record the result.
RVVType T(BT, Log2LMUL, Proto);
if (T.isValid()) {
// Record legal type index and value.
LegalTypes.insert({Idx, T});
return &(LegalTypes[Idx]);
}
// Record illegal type index.
IllegalTypes.insert(Idx);
return llvm::None;
}
void RVVEmitter::emitArchMacroAndBody(
std::vector<std::unique_ptr<RVVIntrinsic>> &Defs, raw_ostream &OS,
std::function<void(raw_ostream &, const RVVIntrinsic &)> PrintBody) {
RISCVPredefinedMacroT PrevMacros =
(*Defs.begin())->getRISCVPredefinedMacros();
bool NeedEndif = emitMacroRestrictionStr(PrevMacros, OS);
for (auto &Def : Defs) {
RISCVPredefinedMacroT CurMacros = Def->getRISCVPredefinedMacros();
if (CurMacros != PrevMacros) {
if (NeedEndif)
OS << "#endif\n\n";
NeedEndif = emitMacroRestrictionStr(CurMacros, OS);
PrevMacros = CurMacros;
}
if (Def->hasAutoDef())
PrintBody(OS, *Def);
}
if (NeedEndif)
OS << "#endif\n\n";
}
bool RVVEmitter::emitMacroRestrictionStr(RISCVPredefinedMacroT PredefinedMacros,
raw_ostream &OS) {
if (PredefinedMacros == RISCVPredefinedMacro::Basic)
return false;
OS << "#if ";
ListSeparator LS(" && ");
if (PredefinedMacros & RISCVPredefinedMacro::Zfh)
OS << LS << "defined(__riscv_zfh)";
if (PredefinedMacros & RISCVPredefinedMacro::RV64)
OS << LS << "(__riscv_xlen == 64)";
if (PredefinedMacros & RISCVPredefinedMacro::VectorMaxELen64)
OS << LS << "(__riscv_v_elen >= 64)";
if (PredefinedMacros & RISCVPredefinedMacro::VectorMaxELenFp32)
OS << LS << "(__riscv_v_elen_fp >= 32)";
if (PredefinedMacros & RISCVPredefinedMacro::VectorMaxELenFp64)
OS << LS << "(__riscv_v_elen_fp >= 64)";
OS << "\n";
return true;
}
namespace clang {
void EmitRVVHeader(RecordKeeper &Records, raw_ostream &OS) {
RVVEmitter(Records).createHeader(OS);
}
void EmitRVVBuiltins(RecordKeeper &Records, raw_ostream &OS) {
RVVEmitter(Records).createBuiltins(OS);
}
void EmitRVVBuiltinCG(RecordKeeper &Records, raw_ostream &OS) {
RVVEmitter(Records).createCodeGen(OS);
}
} // End namespace clang
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