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// SPDX-License-Identifier: GPL-3.0-or-later
#include "rcc/CodeGen/LowLevelType.h"
#include <array>
#include <string>
namespace rcc {
namespace {
struct FloatSemanticsInfo final {
std::uint32_t BitWidth;
std::string_view Name;
std::string_view Spelling;
};
constexpr std::array FloatSemanticsTable{
FloatSemanticsInfo{16, "IEEE half", "f16"},
FloatSemanticsInfo{16, "bfloat", "bf16"},
FloatSemanticsInfo{32, "IEEE single", "f32"},
FloatSemanticsInfo{64, "IEEE double", "f64"},
FloatSemanticsInfo{128, "IEEE quad", "f128"},
FloatSemanticsInfo{128, "PPC double-double", "ppcf128"},
FloatSemanticsInfo{8, "float8 E5M2", "f8e5m2"},
FloatSemanticsInfo{8, "float8 E5M2 FNUZ", "f8e5m2fnuz"},
FloatSemanticsInfo{8, "float8 E4M3", "f8e4m3"},
FloatSemanticsInfo{8, "float8 E4M3 FN", "f8e4m3fn"},
FloatSemanticsInfo{8, "float8 E4M3 FNUZ", "f8e4m3fnuz"},
FloatSemanticsInfo{8, "float8 E4M3 B11 FNUZ", "f8e4m3b11fnuz"},
FloatSemanticsInfo{8, "float8 E3M4", "f8e3m4"},
FloatSemanticsInfo{19, "TensorFloat-32", "tf32"},
FloatSemanticsInfo{8, "float8 E8M0 FNU", "f8e8m0fnu"},
FloatSemanticsInfo{6, "float6 E3M2 FN", "f6e3m2fn"},
FloatSemanticsInfo{6, "float6 E2M3 FN", "f6e2m3fn"},
FloatSemanticsInfo{4, "float4 E2M1 FN", "f4e2m1fn"},
FloatSemanticsInfo{80, "x87 double-extended", "x86fp80"},
};
static_assert(FloatSemanticsTable.size() == static_cast<std::size_t>(FloatSemantics::Count));
[[nodiscard]] const FloatSemanticsInfo *getFloatSemanticsInfo(FloatSemantics Semantics) noexcept {
const auto Index = static_cast<std::size_t>(Semantics);
if (Index >= FloatSemanticsTable.size())
return nullptr;
return &FloatSemanticsTable[Index];
}
[[nodiscard]] LLT::Kind getVectorKind(LLT ElementType) noexcept {
switch (ElementType.kind()) {
case LLT::Kind::AnyScalar:
return LLT::Kind::VectorAny;
case LLT::Kind::Integer:
return LLT::Kind::VectorInteger;
case LLT::Kind::Float:
return LLT::Kind::VectorFloat;
case LLT::Kind::Pointer:
return LLT::Kind::VectorPointer;
case LLT::Kind::Invalid:
case LLT::Kind::Token:
case LLT::Kind::VectorAny:
case LLT::Kind::VectorInteger:
case LLT::Kind::VectorFloat:
case LLT::Kind::VectorPointer:
return LLT::Kind::Invalid;
}
return LLT::Kind::Invalid;
}
} // namespace
bool isKnownFloatSemantics(FloatSemantics Semantics) noexcept {
return getFloatSemanticsInfo(Semantics) != nullptr;
}
std::optional<std::uint32_t> getFloatSemanticsBitWidth(FloatSemantics Semantics) noexcept {
const auto *Info = getFloatSemanticsInfo(Semantics);
if (Info == nullptr)
return std::nullopt;
return Info->BitWidth;
}
std::string_view getFloatSemanticsName(FloatSemantics Semantics) noexcept {
const auto *Info = getFloatSemanticsInfo(Semantics);
if (Info == nullptr)
return "unknown";
return Info->Name;
}
std::string_view getFloatSemanticsSpelling(FloatSemantics Semantics) noexcept {
const auto *Info = getFloatSemanticsInfo(Semantics);
if (Info == nullptr)
return "invalid-float";
return Info->Spelling;
}
Expected<LLT> LLT::makeScalar(Kind TypeKind, std::uint64_t BitWidth) {
if (BitWidth == 0 || BitWidth > MaxBitWidth) {
return makeUnexpected(ErrorCode::InvalidArgument,
"LLT bit width must be in the range [1, 65535]");
}
return LLT(encode(TypeKind, static_cast<std::uint32_t>(BitWidth), 0, 0, false));
}
Expected<LLT> LLT::makeAnyScalar(std::uint64_t BitWidth) {
return makeScalar(Kind::AnyScalar, BitWidth);
}
Expected<LLT> LLT::makeInteger(std::uint64_t BitWidth) {
return makeScalar(Kind::Integer, BitWidth);
}
Expected<LLT> LLT::makeFloat(FloatSemantics Semantics) {
const auto BitWidth = getFloatSemanticsBitWidth(Semantics);
if (!BitWidth) {
return makeUnexpected(ErrorCode::InvalidArgument, "unknown floating-point semantics");
}
return LLT(encode(Kind::Float, *BitWidth, 0, static_cast<std::uint32_t>(Semantics), false));
}
Expected<LLT> LLT::makePointer(std::uint64_t AddressSpace, std::uint64_t BitWidth) {
if (BitWidth == 0 || BitWidth > MaxBitWidth) {
return makeUnexpected(ErrorCode::InvalidArgument,
"LLT pointer bit width must be in the range [1, 65535]");
}
if (AddressSpace > MaxAddressSpace) {
return makeUnexpected(ErrorCode::InvalidArgument, "LLT address space must fit in 24 bits");
}
return LLT(encode(Kind::Pointer, static_cast<std::uint32_t>(BitWidth), 0,
static_cast<std::uint32_t>(AddressSpace), false));
}
Expected<LLT> LLT::makeFixedVector(std::uint64_t ElementCount, LLT ElementType) {
return makeVector(ElementCount, false, ElementType);
}
Expected<LLT> LLT::makeScalableVector(std::uint64_t MinimumElementCount, LLT ElementType) {
return makeVector(MinimumElementCount, true, ElementType);
}
Expected<LLT> LLT::makeVector(std::uint64_t ElementCount, bool IsScalable, LLT ElementType) {
if (ElementCount == 0 || ElementCount > MaxElementCount) {
return makeUnexpected(ErrorCode::InvalidArgument,
"LLT vector element count must be in the range [1, 65535]");
}
if (!IsScalable && ElementCount == 1) {
return makeUnexpected(ErrorCode::InvalidArgument,
"a fixed LLT vector must contain at least two elements");
}
const Kind VectorKind = getVectorKind(ElementType);
if (VectorKind == Kind::Invalid) {
return makeUnexpected(ErrorCode::InvalidArgument,
"LLT vector elements must be non-vector value types");
}
std::uint32_t Auxiliary = 0;
if (ElementType.isPointer())
Auxiliary = *ElementType.addressSpace();
else if (ElementType.isFloat())
Auxiliary = static_cast<std::uint32_t>(*ElementType.floatSemantics());
return LLT(encode(VectorKind, ElementType.scalarBitWidth(),
static_cast<std::uint32_t>(ElementCount), Auxiliary, IsScalable));
}
std::optional<std::uint32_t> LLT::addressSpace() const noexcept {
if (!isPointerOrPointerVector())
return std::nullopt;
return auxiliaryValue();
}
std::optional<FloatSemantics> LLT::floatSemantics() const noexcept {
if (!isFloatOrFloatVector())
return std::nullopt;
return static_cast<FloatSemantics>(auxiliaryValue());
}
std::optional<LLT> LLT::scalarElementType() const noexcept {
switch (kind()) {
case Kind::VectorAny:
return LLT(encode(Kind::AnyScalar, scalarBitWidth(), 0, 0, false));
case Kind::VectorInteger:
return LLT(encode(Kind::Integer, scalarBitWidth(), 0, 0, false));
case Kind::VectorFloat:
return LLT(encode(Kind::Float, scalarBitWidth(), 0, auxiliaryValue(), false));
case Kind::VectorPointer:
return LLT(encode(Kind::Pointer, scalarBitWidth(), 0, auxiliaryValue(), false));
case Kind::Invalid:
case Kind::Token:
case Kind::AnyScalar:
case Kind::Integer:
case Kind::Float:
case Kind::Pointer:
return std::nullopt;
}
return std::nullopt;
}
std::string LLT::toString() const {
if (!isValid())
return "LLT_invalid";
if (isToken())
return "s0";
std::string ScalarSpelling;
switch (kind()) {
case Kind::AnyScalar:
case Kind::VectorAny:
ScalarSpelling = "s" + std::to_string(scalarBitWidth());
break;
case Kind::Integer:
case Kind::VectorInteger:
ScalarSpelling = "i" + std::to_string(scalarBitWidth());
break;
case Kind::Float:
case Kind::VectorFloat:
ScalarSpelling =
std::string(getFloatSemanticsSpelling(static_cast<FloatSemantics>(auxiliaryValue())));
break;
case Kind::Pointer:
case Kind::VectorPointer:
ScalarSpelling =
"p" + std::to_string(auxiliaryValue()) + ":" + std::to_string(scalarBitWidth());
break;
case Kind::Invalid:
case Kind::Token:
break;
}
if (!isVector())
return ScalarSpelling;
std::string Result = "<";
if (isScalableVector())
Result += "vscale x ";
Result += std::to_string(minimumElementCount());
Result += " x ";
Result += ScalarSpelling;
Result += ">";
return Result;
}
} // namespace rcc
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