1 files changed, 95 insertions, 0 deletions

diff --git a/contrib/llvm-project/llvm/lib/Support/FloatingPointMode.cpp b/contrib/llvm-project/llvm/lib/Support/FloatingPointMode.cpp
new file mode 100644
index 000000000000..9543884ff46e
--- /dev/null
+++ b/contrib/llvm-project/llvm/lib/Support/FloatingPointMode.cpp
@@ -0,0 +1,95 @@
+//===- FloatingPointMode.cpp ------------------------------------*- 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/ADT/FloatingPointMode.h"
+#include "llvm/ADT/StringExtras.h"
+
+using namespace llvm;
+
+FPClassTest llvm::fneg(FPClassTest Mask) {
+  FPClassTest NewMask = Mask & fcNan;
+  if (Mask & fcNegInf)
+    NewMask |= fcPosInf;
+  if (Mask & fcNegNormal)
+    NewMask |= fcPosNormal;
+  if (Mask & fcNegSubnormal)
+    NewMask |= fcPosSubnormal;
+  if (Mask & fcNegZero)
+    NewMask |= fcPosZero;
+  if (Mask & fcPosZero)
+    NewMask |= fcNegZero;
+  if (Mask & fcPosSubnormal)
+    NewMask |= fcNegSubnormal;
+  if (Mask & fcPosNormal)
+    NewMask |= fcNegNormal;
+  if (Mask & fcPosInf)
+    NewMask |= fcNegInf;
+  return NewMask;
+}
+
+FPClassTest llvm::fabs(FPClassTest Mask) {
+  FPClassTest NewMask = Mask & fcNan;
+  if (Mask & fcPosZero)
+    NewMask |= fcZero;
+  if (Mask & fcPosSubnormal)
+    NewMask |= fcSubnormal;
+  if (Mask & fcPosNormal)
+    NewMask |= fcNormal;
+  if (Mask & fcPosInf)
+    NewMask |= fcInf;
+  return NewMask;
+}
+
+// Every bitfield has a unique name and one or more aliasing names that cover
+// multiple bits. Names should be listed in order of preference, with higher
+// popcounts listed first.
+//
+// Bits are consumed as printed. Each field should only be represented in one
+// printed field.
+static constexpr std::pair<FPClassTest, StringLiteral> NoFPClassName[] = {
+  {fcAllFlags, "all"},
+  {fcNan, "nan"},
+  {fcSNan, "snan"},
+  {fcQNan, "qnan"},
+  {fcInf, "inf"},
+  {fcNegInf, "ninf"},
+  {fcPosInf, "pinf"},
+  {fcZero, "zero"},
+  {fcNegZero, "nzero"},
+  {fcPosZero, "pzero"},
+  {fcSubnormal, "sub"},
+  {fcNegSubnormal, "nsub"},
+  {fcPosSubnormal, "psub"},
+  {fcNormal, "norm"},
+  {fcNegNormal, "nnorm"},
+  {fcPosNormal, "pnorm"}
+};
+
+raw_ostream &llvm::operator<<(raw_ostream &OS, FPClassTest Mask) {
+  OS << '(';
+
+  if (Mask == fcNone) {
+    OS << "none)";
+    return OS;
+  }
+
+  ListSeparator LS(" ");
+  for (auto [BitTest, Name] : NoFPClassName) {
+    if ((Mask & BitTest) == BitTest) {
+      OS << LS << Name;
+
+      // Clear the bits so we don't print any aliased names later.
+      Mask &= ~BitTest;
+    }
+  }
+
+  assert(Mask == 0 && "didn't print some mask bits");
+
+  OS << ')';
+  return OS;
+}