1 files changed, 104 insertions, 0 deletions
diff --git a/lib/Basic/Targets/RISCV.cpp b/lib/Basic/Targets/RISCV.cpp
new file mode 100644
index 0000000000000..7eb5e6a686a9a
--- /dev/null
+++ b/lib/Basic/Targets/RISCV.cpp
@@ -0,0 +1,104 @@
+//===--- RISCV.cpp - Implement RISCV target feature support ---------------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// 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"}, "x15"},  {{"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);
+}
+
+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 and ABIs are supported.
+  Builder.defineMacro("__riscv_cmodel_medlow");
+  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;
+}