From 7aa1c321f00d29fdc84e9a03080853aa25dd06fc Mon Sep 17 00:00:00 2001
From: Shuxin Yang <shuxin.llvm@gmail.com>
Date: Mon, 7 Jan 2013 18:59:35 +0000
Subject: Implement APFloat::isDenormal()

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@171764 91177308-0d34-0410-b5e6-96231b3b80d8
---
 lib/Support/APFloat.cpp | 7 +++++++
 1 file changed, 7 insertions(+)

(limited to 'lib/Support/APFloat.cpp')

diff --git a/lib/Support/APFloat.cpp b/lib/Support/APFloat.cpp
index 17f38918b3..0e3c619170 100644
--- a/lib/Support/APFloat.cpp
+++ b/lib/Support/APFloat.cpp
@@ -696,6 +696,13 @@ APFloat::operator=(const APFloat &rhs)
   return *this;
 }
 
+bool
+APFloat::isDenormal() const {
+  return isNormal() && (exponent == semantics->minExponent) &&
+         (APInt::tcExtractBit(significandParts(), 
+                              semantics->precision - 1) == 0);
+}
+
 bool
 APFloat::bitwiseIsEqual(const APFloat &rhs) const {
   if (this == &rhs)
-- 
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