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llvm-project/llvm/lib/Support/RISCVISAInfo.cpp
Alex Bradbury 18c3c46858
[RISCV] Update Zfa extension version to 1.0 (#67964) 
The Zfa specification was recently ratified
<https://wiki.riscv.org/display/HOME/Recently+Ratified+Extensions>. This
commit bumps the version to 1.0, but leaves it as an experimental
extension (to be done in a follow-on patch), so reviews can focus on
confirming there haven't been spec changes we have missed (which as
noted below, is more difficult than usual).

Because the development of the Zfa spec overlapped with the transition
of riscv-isa-manual from LaTeX to AsciiDoc, it's more difficult than
usual to confirm version changes. The linked PDF in RISCVUsage is for
some reason a 404. Key commit histories to review are:
* Changes to zfa.adoc on the main branch
<https://github.com/riscv/riscv-isa-manual/commits/main/src/zfa.adoc>
* Changes to zfa.tex on the now defunct latex branch
<https://github.com/riscv/riscv-isa-manual/commits/latex/src/zfa.tex>

From reviewing these, I believe there have been no changes to the spec
since version 0.1/0.2 (sadly the AsciiDoc and LaTeX versions of the spec
are inconsistent about version numbering).
2023-10-03 17:54:29 +01:00

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//===-- RISCVISAInfo.cpp - RISC-V Arch String Parser ------------*- C++ -*-===//
//
// 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
//
//===----------------------------------------------------------------------===//
#include "llvm/Support/RISCVISAInfo.h"
#include "llvm/ADT/STLExtras.h"
#include "llvm/ADT/SetVector.h"
#include "llvm/ADT/StringExtras.h"
#include "llvm/ADT/StringRef.h"
#include "llvm/Support/Errc.h"
#include "llvm/Support/Error.h"
#include "llvm/Support/raw_ostream.h"
#include <array>
#include <atomic>
#include <optional>
#include <string>
#include <vector>
using namespace llvm;
namespace {
/// Represents the major and version number components of a RISC-V extension
struct RISCVExtensionVersion {
unsigned Major;
unsigned Minor;
};
struct RISCVSupportedExtension {
const char *Name;
/// Supported version.
RISCVExtensionVersion Version;
bool operator<(const RISCVSupportedExtension &RHS) const {
return StringRef(Name) < StringRef(RHS.Name);
}
};
} // end anonymous namespace
static constexpr StringLiteral AllStdExts = "mafdqlcbkjtpvnh";
static const char *RISCVGImplications[] = {
"i", "m", "a", "f", "d", "zicsr", "zifencei"
};
// NOTE: This table should be sorted alphabetically by extension name.
static const RISCVSupportedExtension SupportedExtensions[] = {
{"a", RISCVExtensionVersion{2, 1}},
{"c", RISCVExtensionVersion{2, 0}},
{"d", RISCVExtensionVersion{2, 2}},
{"e", RISCVExtensionVersion{2, 0}},
{"f", RISCVExtensionVersion{2, 2}},
{"h", RISCVExtensionVersion{1, 0}},
{"i", RISCVExtensionVersion{2, 1}},
{"m", RISCVExtensionVersion{2, 0}},
{"svinval", RISCVExtensionVersion{1, 0}},
{"svnapot", RISCVExtensionVersion{1, 0}},
{"svpbmt", RISCVExtensionVersion{1, 0}},
{"v", RISCVExtensionVersion{1, 0}},
// vendor-defined ('X') extensions
{"xcvalu", RISCVExtensionVersion{1, 0}},
{"xcvbi", RISCVExtensionVersion{1, 0}},
{"xcvbitmanip", RISCVExtensionVersion{1, 0}},
{"xcvmac", RISCVExtensionVersion{1, 0}},
{"xcvsimd", RISCVExtensionVersion{1, 0}},
{"xsfcie", RISCVExtensionVersion{1, 0}},
{"xsfvcp", RISCVExtensionVersion{1, 0}},
{"xtheadba", RISCVExtensionVersion{1, 0}},
{"xtheadbb", RISCVExtensionVersion{1, 0}},
{"xtheadbs", RISCVExtensionVersion{1, 0}},
{"xtheadcmo", RISCVExtensionVersion{1, 0}},
{"xtheadcondmov", RISCVExtensionVersion{1, 0}},
{"xtheadfmemidx", RISCVExtensionVersion{1, 0}},
{"xtheadmac", RISCVExtensionVersion{1, 0}},
{"xtheadmemidx", RISCVExtensionVersion{1, 0}},
{"xtheadmempair", RISCVExtensionVersion{1, 0}},
{"xtheadsync", RISCVExtensionVersion{1, 0}},
{"xtheadvdot", RISCVExtensionVersion{1, 0}},
{"xventanacondops", RISCVExtensionVersion{1, 0}},
{"zawrs", RISCVExtensionVersion{1, 0}},
{"zba", RISCVExtensionVersion{1, 0}},
{"zbb", RISCVExtensionVersion{1, 0}},
{"zbc", RISCVExtensionVersion{1, 0}},
{"zbkb", RISCVExtensionVersion{1, 0}},
{"zbkc", RISCVExtensionVersion{1, 0}},
{"zbkx", RISCVExtensionVersion{1, 0}},
{"zbs", RISCVExtensionVersion{1, 0}},
{"zca", RISCVExtensionVersion{1, 0}},
{"zcb", RISCVExtensionVersion{1, 0}},
{"zcd", RISCVExtensionVersion{1, 0}},
{"zce", RISCVExtensionVersion{1, 0}},
{"zcf", RISCVExtensionVersion{1, 0}},
{"zcmp", RISCVExtensionVersion{1, 0}},
{"zcmt", RISCVExtensionVersion{1, 0}},
{"zdinx", RISCVExtensionVersion{1, 0}},
{"zfh", RISCVExtensionVersion{1, 0}},
{"zfhmin", RISCVExtensionVersion{1, 0}},
{"zfinx", RISCVExtensionVersion{1, 0}},
{"zhinx", RISCVExtensionVersion{1, 0}},
{"zhinxmin", RISCVExtensionVersion{1, 0}},
{"zicbom", RISCVExtensionVersion{1, 0}},
{"zicbop", RISCVExtensionVersion{1, 0}},
{"zicboz", RISCVExtensionVersion{1, 0}},
{"zicntr", RISCVExtensionVersion{2, 0}},
{"zicsr", RISCVExtensionVersion{2, 0}},
{"zifencei", RISCVExtensionVersion{2, 0}},
{"zihintntl", RISCVExtensionVersion{1, 0}},
{"zihintpause", RISCVExtensionVersion{2, 0}},
{"zihpm", RISCVExtensionVersion{2, 0}},
{"zk", RISCVExtensionVersion{1, 0}},
{"zkn", RISCVExtensionVersion{1, 0}},
{"zknd", RISCVExtensionVersion{1, 0}},
{"zkne", RISCVExtensionVersion{1, 0}},
{"zknh", RISCVExtensionVersion{1, 0}},
{"zkr", RISCVExtensionVersion{1, 0}},
{"zks", RISCVExtensionVersion{1, 0}},
{"zksed", RISCVExtensionVersion{1, 0}},
{"zksh", RISCVExtensionVersion{1, 0}},
{"zkt", RISCVExtensionVersion{1, 0}},
{"zmmul", RISCVExtensionVersion{1, 0}},
{"zve32f", RISCVExtensionVersion{1, 0}},
{"zve32x", RISCVExtensionVersion{1, 0}},
{"zve64d", RISCVExtensionVersion{1, 0}},
{"zve64f", RISCVExtensionVersion{1, 0}},
{"zve64x", RISCVExtensionVersion{1, 0}},
{"zvfh", RISCVExtensionVersion{1, 0}},
{"zvfhmin", RISCVExtensionVersion{1, 0}},
{"zvl1024b", RISCVExtensionVersion{1, 0}},
{"zvl128b", RISCVExtensionVersion{1, 0}},
{"zvl16384b", RISCVExtensionVersion{1, 0}},
{"zvl2048b", RISCVExtensionVersion{1, 0}},
{"zvl256b", RISCVExtensionVersion{1, 0}},
{"zvl32768b", RISCVExtensionVersion{1, 0}},
{"zvl32b", RISCVExtensionVersion{1, 0}},
{"zvl4096b", RISCVExtensionVersion{1, 0}},
{"zvl512b", RISCVExtensionVersion{1, 0}},
{"zvl64b", RISCVExtensionVersion{1, 0}},
{"zvl65536b", RISCVExtensionVersion{1, 0}},
{"zvl8192b", RISCVExtensionVersion{1, 0}},
};
// NOTE: This table should be sorted alphabetically by extension name.
static const RISCVSupportedExtension SupportedExperimentalExtensions[] = {
{"smaia", RISCVExtensionVersion{1, 0}},
{"ssaia", RISCVExtensionVersion{1, 0}},
{"zacas", RISCVExtensionVersion{1, 0}},
{"zfa", RISCVExtensionVersion{1, 0}},
{"zfbfmin", RISCVExtensionVersion{0, 8}},
{"zicfilp", RISCVExtensionVersion{0, 2}},
{"zicond", RISCVExtensionVersion{1, 0}},
{"ztso", RISCVExtensionVersion{0, 1}},
{"zvbb", RISCVExtensionVersion{1, 0}},
{"zvbc", RISCVExtensionVersion{1, 0}},
{"zvfbfmin", RISCVExtensionVersion{0, 8}},
{"zvfbfwma", RISCVExtensionVersion{0, 8}},
// vector crypto
{"zvkb", RISCVExtensionVersion{1, 0}},
{"zvkg", RISCVExtensionVersion{1, 0}},
{"zvkn", RISCVExtensionVersion{1, 0}},
{"zvknc", RISCVExtensionVersion{1, 0}},
{"zvkned", RISCVExtensionVersion{1, 0}},
{"zvkng", RISCVExtensionVersion{1, 0}},
{"zvknha", RISCVExtensionVersion{1, 0}},
{"zvknhb", RISCVExtensionVersion{1, 0}},
{"zvks", RISCVExtensionVersion{1, 0}},
{"zvksc", RISCVExtensionVersion{1, 0}},
{"zvksed", RISCVExtensionVersion{1, 0}},
{"zvksg", RISCVExtensionVersion{1, 0}},
{"zvksh", RISCVExtensionVersion{1, 0}},
{"zvkt", RISCVExtensionVersion{1, 0}},
};
static void verifyTables() {
#ifndef NDEBUG
static std::atomic<bool> TableChecked(false);
if (!TableChecked.load(std::memory_order_relaxed)) {
assert(llvm::is_sorted(SupportedExtensions) &&
"Extensions are not sorted by name");
assert(llvm::is_sorted(SupportedExperimentalExtensions) &&
"Experimental extensions are not sorted by name");
TableChecked.store(true, std::memory_order_relaxed);
}
#endif
}
static void PrintExtension(const std::string Name, const std::string Version,
const std::string Description) {
outs() << " "
<< format(Description.empty() ? "%-20s%s\n" : "%-20s%-10s%s\n",
Name.c_str(), Version.c_str(), Description.c_str());
}
void llvm::riscvExtensionsHelp(StringMap<StringRef> DescMap) {
outs() << "All available -march extensions for RISC-V\n\n";
PrintExtension("Name", "Version", (DescMap.empty() ? "" : "Description"));
RISCVISAInfo::OrderedExtensionMap ExtMap;
for (const auto &E : SupportedExtensions)
ExtMap[E.Name] = {E.Version.Major, E.Version.Minor};
for (const auto &E : ExtMap) {
std::string Version = std::to_string(E.second.MajorVersion) + "." +
std::to_string(E.second.MinorVersion);
PrintExtension(E.first, Version, DescMap[E.first].str());
}
outs() << "\nExperimental extensions\n";
ExtMap.clear();
for (const auto &E : SupportedExperimentalExtensions)
ExtMap[E.Name] = {E.Version.Major, E.Version.Minor};
for (const auto &E : ExtMap) {
std::string Version = std::to_string(E.second.MajorVersion) + "." +
std::to_string(E.second.MinorVersion);
PrintExtension(E.first, Version, DescMap["experimental-" + E.first].str());
}
outs() << "\nUse -march to specify the target's extension.\n"
"For example, clang -march=rv32i_v1p0\n";
}
static bool stripExperimentalPrefix(StringRef &Ext) {
return Ext.consume_front("experimental-");
}
// This function finds the last character that doesn't belong to a version
// (e.g. zba1p0 is extension 'zba' of version '1p0'). So the function will
// consume [0-9]*p[0-9]* starting from the backward. An extension name will not
// end with a digit or the letter 'p', so this function will parse correctly.
// NOTE: This function is NOT able to take empty strings or strings that only
// have version numbers and no extension name. It assumes the extension name
// will be at least more than one character.
static size_t findLastNonVersionCharacter(StringRef Ext) {
assert(!Ext.empty() &&
"Already guarded by if-statement in ::parseArchString");
int Pos = Ext.size() - 1;
while (Pos > 0 && isDigit(Ext[Pos]))
Pos--;
if (Pos > 0 && Ext[Pos] == 'p' && isDigit(Ext[Pos - 1])) {
Pos--;
while (Pos > 0 && isDigit(Ext[Pos]))
Pos--;
}
return Pos;
}
namespace {
struct LessExtName {
bool operator()(const RISCVSupportedExtension &LHS, StringRef RHS) {
return StringRef(LHS.Name) < RHS;
}
bool operator()(StringRef LHS, const RISCVSupportedExtension &RHS) {
return LHS < StringRef(RHS.Name);
}
};
} // namespace
static std::optional<RISCVExtensionVersion>
findDefaultVersion(StringRef ExtName) {
// Find default version of an extension.
// TODO: We might set default version based on profile or ISA spec.
for (auto &ExtInfo : {ArrayRef(SupportedExtensions),
ArrayRef(SupportedExperimentalExtensions)}) {
auto I = llvm::lower_bound(ExtInfo, ExtName, LessExtName());
if (I == ExtInfo.end() || I->Name != ExtName)
continue;
return I->Version;
}
return std::nullopt;
}
void RISCVISAInfo::addExtension(StringRef ExtName, unsigned MajorVersion,
unsigned MinorVersion) {
RISCVExtensionInfo Ext;
Ext.MajorVersion = MajorVersion;
Ext.MinorVersion = MinorVersion;
Exts[ExtName.str()] = Ext;
}
static StringRef getExtensionTypeDesc(StringRef Ext) {
if (Ext.startswith("s"))
return "standard supervisor-level extension";
if (Ext.startswith("x"))
return "non-standard user-level extension";
if (Ext.startswith("z"))
return "standard user-level extension";
return StringRef();
}
static StringRef getExtensionType(StringRef Ext) {
if (Ext.startswith("s"))
return "s";
if (Ext.startswith("x"))
return "x";
if (Ext.startswith("z"))
return "z";
return StringRef();
}
static std::optional<RISCVExtensionVersion>
isExperimentalExtension(StringRef Ext) {
auto I =
llvm::lower_bound(SupportedExperimentalExtensions, Ext, LessExtName());
if (I == std::end(SupportedExperimentalExtensions) || I->Name != Ext)
return std::nullopt;
return I->Version;
}
bool RISCVISAInfo::isSupportedExtensionFeature(StringRef Ext) {
bool IsExperimental = stripExperimentalPrefix(Ext);
ArrayRef<RISCVSupportedExtension> ExtInfo =
IsExperimental ? ArrayRef(SupportedExperimentalExtensions)
: ArrayRef(SupportedExtensions);
auto I = llvm::lower_bound(ExtInfo, Ext, LessExtName());
return I != ExtInfo.end() && I->Name == Ext;
}
bool RISCVISAInfo::isSupportedExtension(StringRef Ext) {
verifyTables();
for (auto ExtInfo : {ArrayRef(SupportedExtensions),
ArrayRef(SupportedExperimentalExtensions)}) {
auto I = llvm::lower_bound(ExtInfo, Ext, LessExtName());
if (I != ExtInfo.end() && I->Name == Ext)
return true;
}
return false;
}
bool RISCVISAInfo::isSupportedExtension(StringRef Ext, unsigned MajorVersion,
unsigned MinorVersion) {
for (auto ExtInfo : {ArrayRef(SupportedExtensions),
ArrayRef(SupportedExperimentalExtensions)}) {
auto Range =
std::equal_range(ExtInfo.begin(), ExtInfo.end(), Ext, LessExtName());
for (auto I = Range.first, E = Range.second; I != E; ++I)
if (I->Version.Major == MajorVersion && I->Version.Minor == MinorVersion)
return true;
}
return false;
}
bool RISCVISAInfo::hasExtension(StringRef Ext) const {
stripExperimentalPrefix(Ext);
if (!isSupportedExtension(Ext))
return false;
return Exts.count(Ext.str()) != 0;
}
// We rank extensions in the following order:
// -Single letter extensions in canonical order.
// -Unknown single letter extensions in alphabetical order.
// -Multi-letter extensions starting with 'z' sorted by canonical order of
// the second letter then sorted alphabetically.
// -Multi-letter extensions starting with 's' in alphabetical order.
// -(TODO) Multi-letter extensions starting with 'zxm' in alphabetical order.
// -X extensions in alphabetical order.
// These flags are used to indicate the category. The first 6 bits store the
// single letter extension rank for single letter and multi-letter extensions
// starting with 'z'.
enum RankFlags {
RF_Z_EXTENSION = 1 << 6,
RF_S_EXTENSION = 1 << 7,
RF_X_EXTENSION = 1 << 8,
};
// Get the rank for single-letter extension, lower value meaning higher
// priority.
static unsigned singleLetterExtensionRank(char Ext) {
assert(Ext >= 'a' && Ext <= 'z');
switch (Ext) {
case 'i':
return 0;
case 'e':
return 1;
}
size_t Pos = AllStdExts.find(Ext);
if (Pos != StringRef::npos)
return Pos + 2; // Skip 'e' and 'i' from above.
// If we got an unknown extension letter, then give it an alphabetical
// order, but after all known standard extensions.
return 2 + AllStdExts.size() + (Ext - 'a');
}
// Get the rank for multi-letter extension, lower value meaning higher
// priority/order in canonical order.
static unsigned getExtensionRank(const std::string &ExtName) {
assert(ExtName.size() >= 1);
switch (ExtName[0]) {
case 's':
return RF_S_EXTENSION;
case 'z':
assert(ExtName.size() >= 2);
// `z` extension must be sorted by canonical order of second letter.
// e.g. zmx has higher rank than zax.
return RF_Z_EXTENSION | singleLetterExtensionRank(ExtName[1]);
case 'x':
return RF_X_EXTENSION;
default:
assert(ExtName.size() == 1);
return singleLetterExtensionRank(ExtName[0]);
}
}
// Compare function for extension.
// Only compare the extension name, ignore version comparison.
bool RISCVISAInfo::compareExtension(const std::string &LHS,
const std::string &RHS) {
unsigned LHSRank = getExtensionRank(LHS);
unsigned RHSRank = getExtensionRank(RHS);
// If the ranks differ, pick the lower rank.
if (LHSRank != RHSRank)
return LHSRank < RHSRank;
// If the rank is same, it must be sorted by lexicographic order.
return LHS < RHS;
}
void RISCVISAInfo::toFeatures(
std::vector<StringRef> &Features,
llvm::function_ref<StringRef(const Twine &)> StrAlloc,
bool AddAllExtensions) const {
for (auto const &Ext : Exts) {
StringRef ExtName = Ext.first;
if (ExtName == "i")
continue;
if (isExperimentalExtension(ExtName)) {
Features.push_back(StrAlloc("+experimental-" + ExtName));
} else {
Features.push_back(StrAlloc("+" + ExtName));
}
}
if (AddAllExtensions) {
for (const RISCVSupportedExtension &Ext : SupportedExtensions) {
if (Exts.count(Ext.Name))
continue;
Features.push_back(StrAlloc(Twine("-") + Ext.Name));
}
for (const RISCVSupportedExtension &Ext : SupportedExperimentalExtensions) {
if (Exts.count(Ext.Name))
continue;
Features.push_back(StrAlloc(Twine("-experimental-") + Ext.Name));
}
}
}
// Extensions may have a version number, and may be separated by
// an underscore '_' e.g.: rv32i2_m2.
// Version number is divided into major and minor version numbers,
// separated by a 'p'. If the minor version is 0 then 'p0' can be
// omitted from the version string. E.g., rv32i2p0, rv32i2, rv32i2p1.
static Error getExtensionVersion(StringRef Ext, StringRef In, unsigned &Major,
unsigned &Minor, unsigned &ConsumeLength,
bool EnableExperimentalExtension,
bool ExperimentalExtensionVersionCheck) {
StringRef MajorStr, MinorStr;
Major = 0;
Minor = 0;
ConsumeLength = 0;
MajorStr = In.take_while(isDigit);
In = In.substr(MajorStr.size());
if (!MajorStr.empty() && In.consume_front("p")) {
MinorStr = In.take_while(isDigit);
In = In.substr(MajorStr.size() + MinorStr.size() - 1);
// Expected 'p' to be followed by minor version number.
if (MinorStr.empty()) {
return createStringError(
errc::invalid_argument,
"minor version number missing after 'p' for extension '" + Ext + "'");
}
}
if (!MajorStr.empty() && MajorStr.getAsInteger(10, Major))
return createStringError(
errc::invalid_argument,
"Failed to parse major version number for extension '" + Ext + "'");
if (!MinorStr.empty() && MinorStr.getAsInteger(10, Minor))
return createStringError(
errc::invalid_argument,
"Failed to parse minor version number for extension '" + Ext + "'");
ConsumeLength = MajorStr.size();
if (!MinorStr.empty())
ConsumeLength += MinorStr.size() + 1 /*'p'*/;
// Expected multi-character extension with version number to have no
// subsequent characters (i.e. must either end string or be followed by
// an underscore).
if (Ext.size() > 1 && In.size()) {
std::string Error =
"multi-character extensions must be separated by underscores";
return createStringError(errc::invalid_argument, Error);
}
// If experimental extension, require use of current version number
if (auto ExperimentalExtension = isExperimentalExtension(Ext)) {
if (!EnableExperimentalExtension) {
std::string Error = "requires '-menable-experimental-extensions' for "
"experimental extension '" +
Ext.str() + "'";
return createStringError(errc::invalid_argument, Error);
}
if (ExperimentalExtensionVersionCheck &&
(MajorStr.empty() && MinorStr.empty())) {
std::string Error =
"experimental extension requires explicit version number `" +
Ext.str() + "`";
return createStringError(errc::invalid_argument, Error);
}
auto SupportedVers = *ExperimentalExtension;
if (ExperimentalExtensionVersionCheck &&
(Major != SupportedVers.Major || Minor != SupportedVers.Minor)) {
std::string Error = "unsupported version number " + MajorStr.str();
if (!MinorStr.empty())
Error += "." + MinorStr.str();
Error += " for experimental extension '" + Ext.str() +
"' (this compiler supports " + utostr(SupportedVers.Major) +
"." + utostr(SupportedVers.Minor) + ")";
return createStringError(errc::invalid_argument, Error);
}
return Error::success();
}
// Exception rule for `g`, we don't have clear version scheme for that on
// ISA spec.
if (Ext == "g")
return Error::success();
if (MajorStr.empty() && MinorStr.empty()) {
if (auto DefaultVersion = findDefaultVersion(Ext)) {
Major = DefaultVersion->Major;
Minor = DefaultVersion->Minor;
}
// No matter found or not, return success, assume other place will
// verify.
return Error::success();
}
if (RISCVISAInfo::isSupportedExtension(Ext, Major, Minor))
return Error::success();
std::string Error = "unsupported version number " + std::string(MajorStr);
if (!MinorStr.empty())
Error += "." + MinorStr.str();
Error += " for extension '" + Ext.str() + "'";
return createStringError(errc::invalid_argument, Error);
}
llvm::Expected<std::unique_ptr<RISCVISAInfo>>
RISCVISAInfo::parseFeatures(unsigned XLen,
const std::vector<std::string> &Features) {
assert(XLen == 32 || XLen == 64);
std::unique_ptr<RISCVISAInfo> ISAInfo(new RISCVISAInfo(XLen));
for (auto &Feature : Features) {
StringRef ExtName = Feature;
bool Experimental = false;
assert(ExtName.size() > 1 && (ExtName[0] == '+' || ExtName[0] == '-'));
bool Add = ExtName[0] == '+';
ExtName = ExtName.drop_front(1); // Drop '+' or '-'
Experimental = stripExperimentalPrefix(ExtName);
auto ExtensionInfos = Experimental
? ArrayRef(SupportedExperimentalExtensions)
: ArrayRef(SupportedExtensions);
auto ExtensionInfoIterator =
llvm::lower_bound(ExtensionInfos, ExtName, LessExtName());
// Not all features is related to ISA extension, like `relax` or
// `save-restore`, skip those feature.
if (ExtensionInfoIterator == ExtensionInfos.end() ||
ExtensionInfoIterator->Name != ExtName)
continue;
if (Add)
ISAInfo->addExtension(ExtName, ExtensionInfoIterator->Version.Major,
ExtensionInfoIterator->Version.Minor);
else
ISAInfo->Exts.erase(ExtName.str());
}
return RISCVISAInfo::postProcessAndChecking(std::move(ISAInfo));
}
llvm::Expected<std::unique_ptr<RISCVISAInfo>>
RISCVISAInfo::parseNormalizedArchString(StringRef Arch) {
if (llvm::any_of(Arch, isupper)) {
return createStringError(errc::invalid_argument,
"string must be lowercase");
}
// Must start with a valid base ISA name.
unsigned XLen;
if (Arch.startswith("rv32i") || Arch.startswith("rv32e"))
XLen = 32;
else if (Arch.startswith("rv64i") || Arch.startswith("rv64e"))
XLen = 64;
else
return createStringError(errc::invalid_argument,
"arch string must begin with valid base ISA");
std::unique_ptr<RISCVISAInfo> ISAInfo(new RISCVISAInfo(XLen));
// Discard rv32/rv64 prefix.
Arch = Arch.substr(4);
// Each extension is of the form ${name}${major_version}p${minor_version}
// and separated by _. Split by _ and then extract the name and version
// information for each extension.
SmallVector<StringRef, 8> Split;
Arch.split(Split, '_');
for (StringRef Ext : Split) {
StringRef Prefix, MinorVersionStr;
std::tie(Prefix, MinorVersionStr) = Ext.rsplit('p');
if (MinorVersionStr.empty())
return createStringError(errc::invalid_argument,
"extension lacks version in expected format");
unsigned MajorVersion, MinorVersion;
if (MinorVersionStr.getAsInteger(10, MinorVersion))
return createStringError(errc::invalid_argument,
"failed to parse minor version number");
// Split Prefix into the extension name and the major version number
// (the trailing digits of Prefix).
int TrailingDigits = 0;
StringRef ExtName = Prefix;
while (!ExtName.empty()) {
if (!isDigit(ExtName.back()))
break;
ExtName = ExtName.drop_back(1);
TrailingDigits++;
}
if (!TrailingDigits)
return createStringError(errc::invalid_argument,
"extension lacks version in expected format");
StringRef MajorVersionStr = Prefix.take_back(TrailingDigits);
if (MajorVersionStr.getAsInteger(10, MajorVersion))
return createStringError(errc::invalid_argument,
"failed to parse major version number");
ISAInfo->addExtension(ExtName, MajorVersion, MinorVersion);
}
ISAInfo->updateFLen();
ISAInfo->updateMinVLen();
ISAInfo->updateMaxELen();
return std::move(ISAInfo);
}
llvm::Expected<std::unique_ptr<RISCVISAInfo>>
RISCVISAInfo::parseArchString(StringRef Arch, bool EnableExperimentalExtension,
bool ExperimentalExtensionVersionCheck,
bool IgnoreUnknown) {
// RISC-V ISA strings must be lowercase.
if (llvm::any_of(Arch, isupper)) {
return createStringError(errc::invalid_argument,
"string must be lowercase");
}
bool HasRV64 = Arch.startswith("rv64");
// ISA string must begin with rv32 or rv64.
if (!(Arch.startswith("rv32") || HasRV64) || (Arch.size() < 5)) {
return createStringError(
errc::invalid_argument,
"string must begin with rv32{i,e,g} or rv64{i,e,g}");
}
unsigned XLen = HasRV64 ? 64 : 32;
std::unique_ptr<RISCVISAInfo> ISAInfo(new RISCVISAInfo(XLen));
// The canonical order specified in ISA manual.
// Ref: Table 22.1 in RISC-V User-Level ISA V2.2
StringRef StdExts = AllStdExts;
char Baseline = Arch[4];
// First letter should be 'e', 'i' or 'g'.
switch (Baseline) {
default:
return createStringError(errc::invalid_argument,
"first letter should be 'e', 'i' or 'g'");
case 'e':
case 'i':
break;
case 'g':
// g expands to extensions in RISCVGImplications.
if (Arch.size() > 5 && isDigit(Arch[5]))
return createStringError(errc::invalid_argument,
"version not supported for 'g'");
StdExts = StdExts.drop_front(4);
break;
}
if (Arch.back() == '_')
return createStringError(errc::invalid_argument,
"extension name missing after separator '_'");
// Skip rvxxx
StringRef Exts = Arch.substr(5);
// Remove multi-letter standard extensions, non-standard extensions and
// supervisor-level extensions. They have 'z', 'x', 's' prefixes.
// Parse them at the end.
// Find the very first occurrence of 's', 'x' or 'z'.
StringRef OtherExts;
size_t Pos = Exts.find_first_of("zsx");
if (Pos != StringRef::npos) {
OtherExts = Exts.substr(Pos);
Exts = Exts.substr(0, Pos);
}
unsigned Major, Minor, ConsumeLength;
if (Baseline == 'g') {
// Versions for g are disallowed, and this was checked for previously.
ConsumeLength = 0;
// No matter which version is given to `g`, we always set imafd to default
// version since the we don't have clear version scheme for that on
// ISA spec.
for (const auto *Ext : RISCVGImplications) {
if (auto Version = findDefaultVersion(Ext))
ISAInfo->addExtension(Ext, Version->Major, Version->Minor);
else
llvm_unreachable("Default extension version not found?");
}
} else {
// Baseline is `i` or `e`
if (auto E = getExtensionVersion(
StringRef(&Baseline, 1), Exts, Major, Minor, ConsumeLength,
EnableExperimentalExtension, ExperimentalExtensionVersionCheck)) {
if (!IgnoreUnknown)
return std::move(E);
// If IgnoreUnknown, then ignore an unrecognised version of the baseline
// ISA and just use the default supported version.
consumeError(std::move(E));
auto Version = findDefaultVersion(StringRef(&Baseline, 1));
Major = Version->Major;
Minor = Version->Minor;
}
ISAInfo->addExtension(StringRef(&Baseline, 1), Major, Minor);
}
// Consume the base ISA version number and any '_' between rvxxx and the
// first extension
Exts = Exts.drop_front(ConsumeLength);
Exts.consume_front("_");
auto StdExtsItr = StdExts.begin();
auto StdExtsEnd = StdExts.end();
auto GoToNextExt = [](StringRef::iterator &I, unsigned ConsumeLength,
StringRef::iterator E) {
I += 1 + ConsumeLength;
if (I != E && *I == '_')
++I;
};
for (auto I = Exts.begin(), E = Exts.end(); I != E;) {
char C = *I;
// Check ISA extensions are specified in the canonical order.
while (StdExtsItr != StdExtsEnd && *StdExtsItr != C)
++StdExtsItr;
if (StdExtsItr == StdExtsEnd) {
// Either c contains a valid extension but it was not given in
// canonical order or it is an invalid extension.
if (StdExts.contains(C)) {
return createStringError(
errc::invalid_argument,
"standard user-level extension not given in canonical order '%c'",
C);
}
return createStringError(errc::invalid_argument,
"invalid standard user-level extension '%c'", C);
}
// Move to next char to prevent repeated letter.
++StdExtsItr;
StringRef Next;
unsigned Major, Minor, ConsumeLength;
if (std::next(I) != E)
Next = StringRef(std::next(I), E - std::next(I));
if (auto E = getExtensionVersion(StringRef(&C, 1), Next, Major, Minor,
ConsumeLength, EnableExperimentalExtension,
ExperimentalExtensionVersionCheck)) {
if (IgnoreUnknown) {
consumeError(std::move(E));
GoToNextExt(I, ConsumeLength, Exts.end());
continue;
}
return std::move(E);
}
// The order is OK, then push it into features.
// Currently LLVM supports only "mafdcvh".
if (!isSupportedExtension(StringRef(&C, 1))) {
if (IgnoreUnknown) {
GoToNextExt(I, ConsumeLength, Exts.end());
continue;
}
return createStringError(errc::invalid_argument,
"unsupported standard user-level extension '%c'",
C);
}
ISAInfo->addExtension(StringRef(&C, 1), Major, Minor);
// Consume full extension name and version, including any optional '_'
// between this extension and the next
GoToNextExt(I, ConsumeLength, Exts.end());
}
// Handle other types of extensions other than the standard
// general purpose and standard user-level extensions.
// Parse the ISA string containing non-standard user-level
// extensions, standard supervisor-level extensions and
// non-standard supervisor-level extensions.
// These extensions start with 'z', 's', 'x' prefixes, might have a version
// number (major, minor) and are separated by a single underscore '_'. We do
// not enforce a canonical order for them.
// Set the hardware features for the extensions that are supported.
// Multi-letter extensions are seperated by a single underscore
// as described in RISC-V User-Level ISA V2.2.
SmallVector<StringRef, 8> Split;
OtherExts.split(Split, '_');
SmallVector<StringRef, 8> AllExts;
if (Split.size() > 1 || Split[0] != "") {
for (StringRef Ext : Split) {
if (Ext.empty())
return createStringError(errc::invalid_argument,
"extension name missing after separator '_'");
StringRef Type = getExtensionType(Ext);
StringRef Desc = getExtensionTypeDesc(Ext);
auto Pos = findLastNonVersionCharacter(Ext) + 1;
StringRef Name(Ext.substr(0, Pos));
StringRef Vers(Ext.substr(Pos));
if (Type.empty()) {
if (IgnoreUnknown)
continue;
return createStringError(errc::invalid_argument,
"invalid extension prefix '" + Ext + "'");
}
if (!IgnoreUnknown && Name.size() == Type.size()) {
return createStringError(errc::invalid_argument,
"%s name missing after '%s'",
Desc.str().c_str(), Type.str().c_str());
}
unsigned Major, Minor, ConsumeLength;
if (auto E = getExtensionVersion(Name, Vers, Major, Minor, ConsumeLength,
EnableExperimentalExtension,
ExperimentalExtensionVersionCheck)) {
if (IgnoreUnknown) {
consumeError(std::move(E));
continue;
}
return std::move(E);
}
// Check if duplicated extension.
if (!IgnoreUnknown && llvm::is_contained(AllExts, Name)) {
return createStringError(errc::invalid_argument, "duplicated %s '%s'",
Desc.str().c_str(), Name.str().c_str());
}
if (IgnoreUnknown && !isSupportedExtension(Name))
continue;
ISAInfo->addExtension(Name, Major, Minor);
// Extension format is correct, keep parsing the extensions.
// TODO: Save Type, Name, Major, Minor to avoid parsing them later.
AllExts.push_back(Name);
}
}
for (auto Ext : AllExts) {
if (!isSupportedExtension(Ext)) {
StringRef Desc = getExtensionTypeDesc(getExtensionType(Ext));
return createStringError(errc::invalid_argument, "unsupported %s '%s'",
Desc.str().c_str(), Ext.str().c_str());
}
}
return RISCVISAInfo::postProcessAndChecking(std::move(ISAInfo));
}
Error RISCVISAInfo::checkDependency() {
bool HasC = Exts.count("c") != 0;
bool HasF = Exts.count("f") != 0;
bool HasZfinx = Exts.count("zfinx") != 0;
bool HasVector = Exts.count("zve32x") != 0;
bool HasZvl = MinVLen != 0;
bool HasZcmt = Exts.count("zcmt") != 0;
if (HasF && HasZfinx)
return createStringError(errc::invalid_argument,
"'f' and 'zfinx' extensions are incompatible");
if (HasZvl && !HasVector)
return createStringError(
errc::invalid_argument,
"'zvl*b' requires 'v' or 'zve*' extension to also be specified");
if (Exts.count("zvbb") && !HasVector)
return createStringError(
errc::invalid_argument,
"'zvbb' requires 'v' or 'zve*' extension to also be specified");
if (Exts.count("zvbc") && !Exts.count("zve64x"))
return createStringError(
errc::invalid_argument,
"'zvbc' requires 'v' or 'zve64*' extension to also be specified");
if ((Exts.count("zvkg") || Exts.count("zvkned") || Exts.count("zvknha") ||
Exts.count("zvksed") || Exts.count("zvksh")) &&
!HasVector)
return createStringError(
errc::invalid_argument,
"'zvk*' requires 'v' or 'zve*' extension to also be specified");
if (Exts.count("zvknhb") && !Exts.count("zve64x"))
return createStringError(
errc::invalid_argument,
"'zvknhb' requires 'v' or 'zve64*' extension to also be specified");
if ((HasZcmt || Exts.count("zcmp")) && Exts.count("d") &&
(HasC || Exts.count("zcd")))
return createStringError(
errc::invalid_argument,
Twine("'") + (HasZcmt ? "zcmt" : "zcmp") +
"' extension is incompatible with '" + (HasC ? "c" : "zcd") +
"' extension when 'd' extension is enabled");
if (XLen != 32 && Exts.count("zcf"))
return createStringError(errc::invalid_argument,
"'zcf' is only supported for 'rv32'");
return Error::success();
}
static const char *ImpliedExtsD[] = {"f"};
static const char *ImpliedExtsF[] = {"zicsr"};
static const char *ImpliedExtsV[] = {"zvl128b", "zve64d"};
static const char *ImpliedExtsXTHeadVdot[] = {"v"};
static const char *ImpliedExtsXsfvcp[] = {"zve32x"};
static const char *ImpliedExtsZacas[] = {"a"};
static const char *ImpliedExtsZcb[] = {"zca"};
static const char *ImpliedExtsZcd[] = {"d", "zca"};
static const char *ImpliedExtsZce[] = {"zcb", "zcmp", "zcmt"};
static const char *ImpliedExtsZcf[] = {"f", "zca"};
static const char *ImpliedExtsZcmp[] = {"zca"};
static const char *ImpliedExtsZcmt[] = {"zca"};
static const char *ImpliedExtsZdinx[] = {"zfinx"};
static const char *ImpliedExtsZfa[] = {"f"};
static const char *ImpliedExtsZfbfmin[] = {"f"};
static const char *ImpliedExtsZfh[] = {"f"};
static const char *ImpliedExtsZfhmin[] = {"f"};
static const char *ImpliedExtsZfinx[] = {"zicsr"};
static const char *ImpliedExtsZhinx[] = {"zfinx"};
static const char *ImpliedExtsZhinxmin[] = {"zfinx"};
static const char *ImpliedExtsZicntr[] = {"zicsr"};
static const char *ImpliedExtsZihpm[] = {"zicsr"};
static const char *ImpliedExtsZk[] = {"zkn", "zkt", "zkr"};
static const char *ImpliedExtsZkn[] = {"zbkb", "zbkc", "zbkx",
"zkne", "zknd", "zknh"};
static const char *ImpliedExtsZks[] = {"zbkb", "zbkc", "zbkx", "zksed", "zksh"};
static const char *ImpliedExtsZvbb[] = {"zvkb"};
static const char *ImpliedExtsZve32f[] = {"zve32x", "f"};
static const char *ImpliedExtsZve32x[] = {"zvl32b", "zicsr"};
static const char *ImpliedExtsZve64d[] = {"zve64f", "d"};
static const char *ImpliedExtsZve64f[] = {"zve64x", "zve32f"};
static const char *ImpliedExtsZve64x[] = {"zve32x", "zvl64b"};
static const char *ImpliedExtsZvfbfmin[] = {"zve32f", "zfbfmin"};
static const char *ImpliedExtsZvfbfwma[] = {"zvfbfmin"};
static const char *ImpliedExtsZvfh[] = {"zve32f", "zfhmin"};
static const char *ImpliedExtsZvfhmin[] = {"zve32f"};
static const char *ImpliedExtsZvkn[] = {"zvkb", "zvkned", "zvknhb", "zvkt"};
static const char *ImpliedExtsZvknc[] = {"zvbc", "zvkn"};
static const char *ImpliedExtsZvkng[] = {"zvkg", "zvkn"};
static const char *ImpliedExtsZvknhb[] = {"zvknha"};
static const char *ImpliedExtsZvks[] = {"zvkb", "zvksed", "zvksh", "zvkt"};
static const char *ImpliedExtsZvksc[] = {"zvbc", "zvks"};
static const char *ImpliedExtsZvksg[] = {"zvkg", "zvks"};
static const char *ImpliedExtsZvl1024b[] = {"zvl512b"};
static const char *ImpliedExtsZvl128b[] = {"zvl64b"};
static const char *ImpliedExtsZvl16384b[] = {"zvl8192b"};
static const char *ImpliedExtsZvl2048b[] = {"zvl1024b"};
static const char *ImpliedExtsZvl256b[] = {"zvl128b"};
static const char *ImpliedExtsZvl32768b[] = {"zvl16384b"};
static const char *ImpliedExtsZvl4096b[] = {"zvl2048b"};
static const char *ImpliedExtsZvl512b[] = {"zvl256b"};
static const char *ImpliedExtsZvl64b[] = {"zvl32b"};
static const char *ImpliedExtsZvl65536b[] = {"zvl32768b"};
static const char *ImpliedExtsZvl8192b[] = {"zvl4096b"};
struct ImpliedExtsEntry {
StringLiteral Name;
ArrayRef<const char *> Exts;
bool operator<(const ImpliedExtsEntry &Other) const {
return Name < Other.Name;
}
bool operator<(StringRef Other) const { return Name < Other; }
};
// Note: The table needs to be sorted by name.
static constexpr ImpliedExtsEntry ImpliedExts[] = {
{{"d"}, {ImpliedExtsD}},
{{"f"}, {ImpliedExtsF}},
{{"v"}, {ImpliedExtsV}},
{{"xsfvcp"}, {ImpliedExtsXsfvcp}},
{{"xtheadvdot"}, {ImpliedExtsXTHeadVdot}},
{{"zacas"}, {ImpliedExtsZacas}},
{{"zcb"}, {ImpliedExtsZcb}},
{{"zcd"}, {ImpliedExtsZcd}},
{{"zce"}, {ImpliedExtsZce}},
{{"zcf"}, {ImpliedExtsZcf}},
{{"zcmp"}, {ImpliedExtsZcmp}},
{{"zcmt"}, {ImpliedExtsZcmt}},
{{"zdinx"}, {ImpliedExtsZdinx}},
{{"zfa"}, {ImpliedExtsZfa}},
{{"zfbfmin"}, {ImpliedExtsZfbfmin}},
{{"zfh"}, {ImpliedExtsZfh}},
{{"zfhmin"}, {ImpliedExtsZfhmin}},
{{"zfinx"}, {ImpliedExtsZfinx}},
{{"zhinx"}, {ImpliedExtsZhinx}},
{{"zhinxmin"}, {ImpliedExtsZhinxmin}},
{{"zicntr"}, {ImpliedExtsZicntr}},
{{"zihpm"}, {ImpliedExtsZihpm}},
{{"zk"}, {ImpliedExtsZk}},
{{"zkn"}, {ImpliedExtsZkn}},
{{"zks"}, {ImpliedExtsZks}},
{{"zvbb"}, {ImpliedExtsZvbb}},
{{"zve32f"}, {ImpliedExtsZve32f}},
{{"zve32x"}, {ImpliedExtsZve32x}},
{{"zve64d"}, {ImpliedExtsZve64d}},
{{"zve64f"}, {ImpliedExtsZve64f}},
{{"zve64x"}, {ImpliedExtsZve64x}},
{{"zvfbfmin"}, {ImpliedExtsZvfbfmin}},
{{"zvfbfwma"}, {ImpliedExtsZvfbfwma}},
{{"zvfh"}, {ImpliedExtsZvfh}},
{{"zvfhmin"}, {ImpliedExtsZvfhmin}},
{{"zvkn"}, {ImpliedExtsZvkn}},
{{"zvknc"}, {ImpliedExtsZvknc}},
{{"zvkng"}, {ImpliedExtsZvkng}},
{{"zvknhb"}, {ImpliedExtsZvknhb}},
{{"zvks"}, {ImpliedExtsZvks}},
{{"zvksc"}, {ImpliedExtsZvksc}},
{{"zvksg"}, {ImpliedExtsZvksg}},
{{"zvl1024b"}, {ImpliedExtsZvl1024b}},
{{"zvl128b"}, {ImpliedExtsZvl128b}},
{{"zvl16384b"}, {ImpliedExtsZvl16384b}},
{{"zvl2048b"}, {ImpliedExtsZvl2048b}},
{{"zvl256b"}, {ImpliedExtsZvl256b}},
{{"zvl32768b"}, {ImpliedExtsZvl32768b}},
{{"zvl4096b"}, {ImpliedExtsZvl4096b}},
{{"zvl512b"}, {ImpliedExtsZvl512b}},
{{"zvl64b"}, {ImpliedExtsZvl64b}},
{{"zvl65536b"}, {ImpliedExtsZvl65536b}},
{{"zvl8192b"}, {ImpliedExtsZvl8192b}},
};
void RISCVISAInfo::updateImplication() {
bool HasE = Exts.count("e") != 0;
bool HasI = Exts.count("i") != 0;
// If not in e extension and i extension does not exist, i extension is
// implied
if (!HasE && !HasI) {
auto Version = findDefaultVersion("i");
addExtension("i", Version->Major, Version->Minor);
}
assert(llvm::is_sorted(ImpliedExts) && "Table not sorted by Name");
// This loop may execute over 1 iteration since implication can be layered
// Exits loop if no more implication is applied
SmallSetVector<StringRef, 16> WorkList;
for (auto const &Ext : Exts)
WorkList.insert(Ext.first);
while (!WorkList.empty()) {
StringRef ExtName = WorkList.pop_back_val();
auto I = llvm::lower_bound(ImpliedExts, ExtName);
if (I != std::end(ImpliedExts) && I->Name == ExtName) {
for (const char *ImpliedExt : I->Exts) {
if (WorkList.count(ImpliedExt))
continue;
if (Exts.count(ImpliedExt))
continue;
auto Version = findDefaultVersion(ImpliedExt);
addExtension(ImpliedExt, Version->Major, Version->Minor);
WorkList.insert(ImpliedExt);
}
}
}
// Add Zcf if Zce and F are enabled on RV32.
if (XLen == 32 && Exts.count("zce") && Exts.count("f") &&
!Exts.count("zcf")) {
auto Version = findDefaultVersion("zcf");
addExtension("zcf", Version->Major, Version->Minor);
}
}
struct CombinedExtsEntry {
StringLiteral CombineExt;
ArrayRef<const char *> RequiredExts;
};
static constexpr CombinedExtsEntry CombineIntoExts[] = {
{{"zk"}, {ImpliedExtsZk}},
{{"zkn"}, {ImpliedExtsZkn}},
{{"zks"}, {ImpliedExtsZks}},
{{"zvkn"}, {ImpliedExtsZvkn}},
{{"zvknc"}, {ImpliedExtsZvknc}},
{{"zvkng"}, {ImpliedExtsZvkng}},
{{"zvks"}, {ImpliedExtsZvks}},
{{"zvksc"}, {ImpliedExtsZvksc}},
{{"zvksg"}, {ImpliedExtsZvksg}},
};
void RISCVISAInfo::updateCombination() {
bool IsNewCombine = false;
do {
IsNewCombine = false;
for (CombinedExtsEntry CombineIntoExt : CombineIntoExts) {
auto CombineExt = CombineIntoExt.CombineExt;
auto RequiredExts = CombineIntoExt.RequiredExts;
if (hasExtension(CombineExt))
continue;
bool IsAllRequiredFeatureExist = true;
for (const char *Ext : RequiredExts)
IsAllRequiredFeatureExist &= hasExtension(Ext);
if (IsAllRequiredFeatureExist) {
auto Version = findDefaultVersion(CombineExt);
addExtension(CombineExt, Version->Major, Version->Minor);
IsNewCombine = true;
}
}
} while (IsNewCombine);
}
void RISCVISAInfo::updateFLen() {
FLen = 0;
// TODO: Handle q extension.
if (Exts.count("d"))
FLen = 64;
else if (Exts.count("f"))
FLen = 32;
}
void RISCVISAInfo::updateMinVLen() {
for (auto const &Ext : Exts) {
StringRef ExtName = Ext.first;
bool IsZvlExt = ExtName.consume_front("zvl") && ExtName.consume_back("b");
if (IsZvlExt) {
unsigned ZvlLen;
if (!ExtName.getAsInteger(10, ZvlLen))
MinVLen = std::max(MinVLen, ZvlLen);
}
}
}
void RISCVISAInfo::updateMaxELen() {
// handles EEW restriction by sub-extension zve
for (auto const &Ext : Exts) {
StringRef ExtName = Ext.first;
bool IsZveExt = ExtName.consume_front("zve");
if (IsZveExt) {
if (ExtName.back() == 'f')
MaxELenFp = std::max(MaxELenFp, 32u);
if (ExtName.back() == 'd')
MaxELenFp = std::max(MaxELenFp, 64u);
ExtName = ExtName.drop_back();
unsigned ZveELen;
ExtName.getAsInteger(10, ZveELen);
MaxELen = std::max(MaxELen, ZveELen);
}
}
}
std::string RISCVISAInfo::toString() const {
std::string Buffer;
raw_string_ostream Arch(Buffer);
Arch << "rv" << XLen;
ListSeparator LS("_");
for (auto const &Ext : Exts) {
StringRef ExtName = Ext.first;
auto ExtInfo = Ext.second;
Arch << LS << ExtName;
Arch << ExtInfo.MajorVersion << "p" << ExtInfo.MinorVersion;
}
return Arch.str();
}
std::vector<std::string> RISCVISAInfo::toFeatureVector() const {
std::vector<std::string> FeatureVector;
for (auto const &Ext : Exts) {
std::string ExtName = Ext.first;
if (ExtName == "i") // i is not recognized in clang -cc1
continue;
if (!isSupportedExtension(ExtName))
continue;
std::string Feature = isExperimentalExtension(ExtName)
? "+experimental-" + ExtName
: "+" + ExtName;
FeatureVector.push_back(Feature);
}
return FeatureVector;
}
llvm::Expected<std::unique_ptr<RISCVISAInfo>>
RISCVISAInfo::postProcessAndChecking(std::unique_ptr<RISCVISAInfo> &&ISAInfo) {
ISAInfo->updateImplication();
ISAInfo->updateCombination();
ISAInfo->updateFLen();
ISAInfo->updateMinVLen();
ISAInfo->updateMaxELen();
if (Error Result = ISAInfo->checkDependency())
return std::move(Result);
return std::move(ISAInfo);
}
StringRef RISCVISAInfo::computeDefaultABI() const {
if (XLen == 32) {
if (hasExtension("d"))
return "ilp32d";
if (hasExtension("e"))
return "ilp32e";
return "ilp32";
} else if (XLen == 64) {
if (hasExtension("d"))
return "lp64d";
if (hasExtension("e"))
return "lp64e";
return "lp64";
}
llvm_unreachable("Invalid XLEN");
}
bool RISCVISAInfo::isSupportedExtensionWithVersion(StringRef Ext) {
if (Ext.empty())
return false;
auto Pos = findLastNonVersionCharacter(Ext) + 1;
StringRef Name = Ext.substr(0, Pos);
StringRef Vers = Ext.substr(Pos);
if (Vers.empty())
return false;
unsigned Major, Minor, ConsumeLength;
if (auto E = getExtensionVersion(Name, Vers, Major, Minor, ConsumeLength,
true, true)) {
consumeError(std::move(E));
return false;
}
return true;
}
std::string RISCVISAInfo::getTargetFeatureForExtension(StringRef Ext) {
if (Ext.empty())
return std::string();
auto Pos = findLastNonVersionCharacter(Ext) + 1;
StringRef Name = Ext.substr(0, Pos);
if (Pos != Ext.size() && !isSupportedExtensionWithVersion(Ext))
return std::string();
if (!isSupportedExtension(Name))
return std::string();
return isExperimentalExtension(Name) ? "experimental-" + Name.str()
: Name.str();
}
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