1 files changed, 29 insertions, 0 deletions
diff --git a/backend/lib/CodeGen/MachineIRTypes.cpp b/backend/lib/CodeGen/MachineIRTypes.cpp
new file mode 100644
index 0000000..7f97e98
--- /dev/null
+++ b/backend/lib/CodeGen/MachineIRTypes.cpp
@@ -0,0 +1,29 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+
+#include "rcc/CodeGen/MachineIRTypes.h"
+
+namespace rcc {
+
+Expected<BranchProbability> BranchProbability::fromFraction(std::uint32_t Numerator,
+                                                            std::uint32_t Denominator) {
+  if (Denominator == 0) {
+    return makeUnexpected(ErrorCode::InvalidArgument,
+                          "branch probability denominator must be nonzero");
+  }
+  if (Numerator > Denominator) {
+    return makeUnexpected(ErrorCode::InvalidArgument,
+                          "branch probability numerator cannot exceed its denominator");
+  }
+
+  const std::uint64_t ScaledNumerator = static_cast<std::uint64_t>(Numerator) * MaxRawValue;
+  const std::uint64_t Rounded =
+      (ScaledNumerator + static_cast<std::uint64_t>(Denominator / 2)) / Denominator;
+  return BranchProbability(static_cast<std::uint32_t>(Rounded));
+}
+
+MachineInstrFlags::MachineInstrFlags(std::initializer_list<MachineInstrFlag> Flags) noexcept {
+  for (const MachineInstrFlag Flag : Flags)
+    set(Flag);
+}
+
+} // namespace rcc