1 files changed, 12 insertions, 0 deletions

diff --git a/include/llvm/Support/MathExtras.h b/include/llvm/Support/MathExtras.h
index 9c5f32cd5ff2f..f56241c5790b1 100644
--- a/include/llvm/Support/MathExtras.h
+++ b/include/llvm/Support/MathExtras.h
@@ -457,6 +457,18 @@ inline int64_t abs64(int64_t x) {
   return (x < 0) ? -x : x;
 }
 
+/// SignExtend32 - Sign extend B-bit number x to 32-bit int.
+/// Usage int32_t r = SignExtend32<5>(x);
+template <unsigned B> inline int32_t SignExtend32(int32_t x) {
+  return (x << (32 - B)) >> (32 - B);
+}
+
+/// SignExtend64 - Sign extend B-bit number x to 64-bit int.
+/// Usage int64_t r = SignExtend64<5>(x);
+template <unsigned B> inline int64_t SignExtend64(int32_t x) {
+  return (x << (64 - B)) >> (64 - B);
+}
+
 } // End llvm namespace
 
 #endif