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//===--- RISCV.cpp - Implement RISCV target feature support ---------------===//
//
// 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 file implements RISCV TargetInfo objects.
//
//===----------------------------------------------------------------------===//
#include "RISCV.h"
#include "clang/Basic/MacroBuilder.h"
#include "llvm/ADT/StringSwitch.h"
using namespace clang;
using namespace clang::targets;
ArrayRef<const char *> RISCVTargetInfo::getGCCRegNames() const {
static const char *const GCCRegNames[] = {
"x0", "x1", "x2", "x3", "x4", "x5", "x6", "x7",
"x8", "x9", "x10", "x11", "x12", "x13", "x14", "x15",
"x16", "x17", "x18", "x19", "x20", "x21", "x22", "x23",
"x24", "x25", "x26", "x27", "x28", "x29", "x30", "x31"};
return llvm::makeArrayRef(GCCRegNames);
}
ArrayRef<TargetInfo::GCCRegAlias> RISCVTargetInfo::getGCCRegAliases() const {
static const TargetInfo::GCCRegAlias GCCRegAliases[] = {
{{"zero"}, "x0"}, {{"ra"}, "x1"}, {{"sp"}, "x2"}, {{"gp"}, "x3"},
{{"tp"}, "x4"}, {{"t0"}, "x5"}, {{"t1"}, "x6"}, {{"t2"}, "x7"},
{{"s0"}, "x8"}, {{"s1"}, "x9"}, {{"a0"}, "x10"}, {{"a1"}, "x11"},
{{"a2"}, "x12"}, {{"a3"}, "x13"}, {{"a4"}, "x14"}, {{"a5"}, "x15"},
{{"a6"}, "x16"}, {{"a7"}, "x17"}, {{"s2"}, "x18"}, {{"s3"}, "x19"},
{{"s4"}, "x20"}, {{"s5"}, "x21"}, {{"s6"}, "x22"}, {{"s7"}, "x23"},
{{"s8"}, "x24"}, {{"s9"}, "x25"}, {{"s10"}, "x26"}, {{"s11"}, "x27"},
{{"t3"}, "x28"}, {{"t4"}, "x29"}, {{"t5"}, "x30"}, {{"t6"}, "x31"}};
return llvm::makeArrayRef(GCCRegAliases);
}
bool RISCVTargetInfo::validateAsmConstraint(
const char *&Name, TargetInfo::ConstraintInfo &Info) const {
switch (*Name) {
default:
return false;
case 'I':
// A 12-bit signed immediate.
Info.setRequiresImmediate(-2048, 2047);
return true;
case 'J':
// Integer zero.
Info.setRequiresImmediate(0);
return true;
case 'K':
// A 5-bit unsigned immediate for CSR access instructions.
Info.setRequiresImmediate(0, 31);
return true;
case 'f':
// A floating-point register.
Info.setAllowsRegister();
return true;
case 'A':
// An address that is held in a general-purpose register.
Info.setAllowsMemory();
return true;
}
}
void RISCVTargetInfo::getTargetDefines(const LangOptions &Opts,
MacroBuilder &Builder) const {
Builder.defineMacro("__ELF__");
Builder.defineMacro("__riscv");
bool Is64Bit = getTriple().getArch() == llvm::Triple::riscv64;
Builder.defineMacro("__riscv_xlen", Is64Bit ? "64" : "32");
// TODO: modify when more code models are supported.
Builder.defineMacro("__riscv_cmodel_medlow");
StringRef ABIName = getABI();
if (ABIName == "ilp32f" || ABIName == "lp64f")
Builder.defineMacro("__riscv_float_abi_single");
else if (ABIName == "ilp32d" || ABIName == "lp64d")
Builder.defineMacro("__riscv_float_abi_double");
else if (ABIName == "ilp32e")
Builder.defineMacro("__riscv_abi_rve");
else
Builder.defineMacro("__riscv_float_abi_soft");
if (HasM) {
Builder.defineMacro("__riscv_mul");
Builder.defineMacro("__riscv_div");
Builder.defineMacro("__riscv_muldiv");
}
if (HasA)
Builder.defineMacro("__riscv_atomic");
if (HasF || HasD) {
Builder.defineMacro("__riscv_flen", HasD ? "64" : "32");
Builder.defineMacro("__riscv_fdiv");
Builder.defineMacro("__riscv_fsqrt");
}
if (HasC)
Builder.defineMacro("__riscv_compressed");
}
/// Return true if has this feature, need to sync with handleTargetFeatures.
bool RISCVTargetInfo::hasFeature(StringRef Feature) const {
bool Is64Bit = getTriple().getArch() == llvm::Triple::riscv64;
return llvm::StringSwitch<bool>(Feature)
.Case("riscv", true)
.Case("riscv32", !Is64Bit)
.Case("riscv64", Is64Bit)
.Case("m", HasM)
.Case("a", HasA)
.Case("f", HasF)
.Case("d", HasD)
.Case("c", HasC)
.Default(false);
}
/// Perform initialization based on the user configured set of features.
bool RISCVTargetInfo::handleTargetFeatures(std::vector<std::string> &Features,
DiagnosticsEngine &Diags) {
for (const auto &Feature : Features) {
if (Feature == "+m")
HasM = true;
else if (Feature == "+a")
HasA = true;
else if (Feature == "+f")
HasF = true;
else if (Feature == "+d")
HasD = true;
else if (Feature == "+c")
HasC = true;
}
return true;
}
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