X-Git-Url: http://plrg.eecs.uci.edu/git/?a=blobdiff_plain;f=unittests%2FADT%2FAPFloatTest.cpp;h=55c3f48f00d4251e0d21e41dc7cf4330d012a165;hb=abb30d1a458e4b68274a6e56fe3d1e5575845d81;hp=880e831708433268c29c6b67167e6f832582e2ec;hpb=c08f0e3743eb13e2e59de3b4a84f686cdd254b2d;p=oota-llvm.git

diff --git a/unittests/ADT/APFloatTest.cpp b/unittests/ADT/APFloatTest.cpp
index 880e8317084..55c3f48f00d 100644
--- a/unittests/ADT/APFloatTest.cpp
+++ b/unittests/ADT/APFloatTest.cpp
@@ -13,6 +13,7 @@
 #include "llvm/ADT/SmallVector.h"
 #include "llvm/Support/raw_ostream.h"
 #include "gtest/gtest.h"
+#include <cmath>
 #include <ostream>
 #include <string>
 
@@ -474,6 +475,59 @@ TEST(APFloatTest, FMA) {
     f1.fusedMultiplyAdd(f2, f3, APFloat::rmNearestTiesToEven);
     EXPECT_EQ(12.0f, f1.convertToFloat());
   }
+
+  // Test for correct zero sign when answer is exactly zero.
+  // fma(1.0, -1.0, 1.0) -> +ve 0.
+  {
+    APFloat f1(1.0);
+    APFloat f2(-1.0);
+    APFloat f3(1.0);
+    f1.fusedMultiplyAdd(f2, f3, APFloat::rmNearestTiesToEven);
+    EXPECT_TRUE(!f1.isNegative() && f1.isZero());
+  }
+
+  // Test for correct zero sign when answer is exactly zero and rounding towards
+  // negative.
+  // fma(1.0, -1.0, 1.0) -> +ve 0.
+  {
+    APFloat f1(1.0);
+    APFloat f2(-1.0);
+    APFloat f3(1.0);
+    f1.fusedMultiplyAdd(f2, f3, APFloat::rmTowardNegative);
+    EXPECT_TRUE(f1.isNegative() && f1.isZero());
+  }
+
+  // Test for correct (in this case -ve) sign when adding like signed zeros.
+  // Test fma(0.0, -0.0, -0.0) -> -ve 0.
+  {
+    APFloat f1(0.0);
+    APFloat f2(-0.0);
+    APFloat f3(-0.0);
+    f1.fusedMultiplyAdd(f2, f3, APFloat::rmNearestTiesToEven);
+    EXPECT_TRUE(f1.isNegative() && f1.isZero());
+  }
+
+  // Test -ve sign preservation when small negative results underflow.
+  {
+    APFloat f1(APFloat::IEEEdouble,  "-0x1p-1074");
+    APFloat f2(APFloat::IEEEdouble, "+0x1p-1074");
+    APFloat f3(0.0);
+    f1.fusedMultiplyAdd(f2, f3, APFloat::rmNearestTiesToEven);
+    EXPECT_TRUE(f1.isNegative() && f1.isZero());
+  }
+
+  // Test x87 extended precision case from http://llvm.org/PR20728.
+  {
+    APFloat M1(APFloat::x87DoubleExtended, 1.0);
+    APFloat M2(APFloat::x87DoubleExtended, 1.0);
+    APFloat A(APFloat::x87DoubleExtended, 3.0);
+
+    bool losesInfo = false;
+    M1.fusedMultiplyAdd(M1, A, APFloat::rmNearestTiesToEven);
+    M1.convert(APFloat::IEEEsingle, APFloat::rmNearestTiesToEven, &losesInfo);
+    EXPECT_FALSE(losesInfo);
+    EXPECT_EQ(4.0f, M1.convertToFloat());
+  }
 }
 
 TEST(APFloatTest, MinNum) {
@@ -1252,14 +1306,28 @@ TEST(APFloatTest, roundToIntegral) {
   EXPECT_EQ(-0.0, P.convertToDouble());
   P = APFloat::getNaN(APFloat::IEEEdouble);
   P.roundToIntegral(APFloat::rmTowardZero);
-  EXPECT_TRUE(IsNAN(P.convertToDouble()));
+  EXPECT_TRUE(std::isnan(P.convertToDouble()));
   P = APFloat::getInf(APFloat::IEEEdouble);
   P.roundToIntegral(APFloat::rmTowardZero);
-  EXPECT_TRUE(IsInf(P.convertToDouble()) && P.convertToDouble() > 0.0);
+  EXPECT_TRUE(std::isinf(P.convertToDouble()) && P.convertToDouble() > 0.0);
   P = APFloat::getInf(APFloat::IEEEdouble, true);
   P.roundToIntegral(APFloat::rmTowardZero);
-  EXPECT_TRUE(IsInf(P.convertToDouble()) && P.convertToDouble() < 0.0);
-
+  EXPECT_TRUE(std::isinf(P.convertToDouble()) && P.convertToDouble() < 0.0);
+}
+  
+TEST(APFloatTest, isInteger) {
+  APFloat T(-0.0);
+  EXPECT_TRUE(T.isInteger());
+  T = APFloat(3.14159);
+  EXPECT_FALSE(T.isInteger());
+  T = APFloat::getNaN(APFloat::IEEEdouble);
+  EXPECT_FALSE(T.isInteger());
+  T = APFloat::getInf(APFloat::IEEEdouble);
+  EXPECT_FALSE(T.isInteger());
+  T = APFloat::getInf(APFloat::IEEEdouble, true);
+  EXPECT_FALSE(T.isInteger());
+  T = APFloat::getLargest(APFloat::IEEEdouble);
+  EXPECT_TRUE(T.isInteger());
 }
 
 TEST(APFloatTest, getLargest) {
@@ -2714,6 +2782,44 @@ TEST(APFloatTest, operatorOverloads) {
   EXPECT_TRUE(One.bitwiseIsEqual(Two / Two));
 }
 
+TEST(APFloatTest, abs) {
+  APFloat PInf = APFloat::getInf(APFloat::IEEEsingle, false);
+  APFloat MInf = APFloat::getInf(APFloat::IEEEsingle, true);
+  APFloat PZero = APFloat::getZero(APFloat::IEEEsingle, false);
+  APFloat MZero = APFloat::getZero(APFloat::IEEEsingle, true);
+  APFloat PQNaN = APFloat::getNaN(APFloat::IEEEsingle, false);
+  APFloat MQNaN = APFloat::getNaN(APFloat::IEEEsingle, true);
+  APFloat PSNaN = APFloat::getSNaN(APFloat::IEEEsingle, false);
+  APFloat MSNaN = APFloat::getSNaN(APFloat::IEEEsingle, true);
+  APFloat PNormalValue = APFloat(APFloat::IEEEsingle, "0x1p+0");
+  APFloat MNormalValue = APFloat(APFloat::IEEEsingle, "-0x1p+0");
+  APFloat PLargestValue = APFloat::getLargest(APFloat::IEEEsingle, false);
+  APFloat MLargestValue = APFloat::getLargest(APFloat::IEEEsingle, true);
+  APFloat PSmallestValue = APFloat::getSmallest(APFloat::IEEEsingle, false);
+  APFloat MSmallestValue = APFloat::getSmallest(APFloat::IEEEsingle, true);
+  APFloat PSmallestNormalized =
+    APFloat::getSmallestNormalized(APFloat::IEEEsingle, false);
+  APFloat MSmallestNormalized =
+    APFloat::getSmallestNormalized(APFloat::IEEEsingle, true);
+
+  EXPECT_TRUE(PInf.bitwiseIsEqual(abs(PInf)));
+  EXPECT_TRUE(PInf.bitwiseIsEqual(abs(MInf)));
+  EXPECT_TRUE(PZero.bitwiseIsEqual(abs(PZero)));
+  EXPECT_TRUE(PZero.bitwiseIsEqual(abs(MZero)));
+  EXPECT_TRUE(PQNaN.bitwiseIsEqual(abs(PQNaN)));
+  EXPECT_TRUE(PQNaN.bitwiseIsEqual(abs(MQNaN)));
+  EXPECT_TRUE(PSNaN.bitwiseIsEqual(abs(PSNaN)));
+  EXPECT_TRUE(PSNaN.bitwiseIsEqual(abs(MSNaN)));
+  EXPECT_TRUE(PNormalValue.bitwiseIsEqual(abs(PNormalValue)));
+  EXPECT_TRUE(PNormalValue.bitwiseIsEqual(abs(MNormalValue)));
+  EXPECT_TRUE(PLargestValue.bitwiseIsEqual(abs(PLargestValue)));
+  EXPECT_TRUE(PLargestValue.bitwiseIsEqual(abs(MLargestValue)));
+  EXPECT_TRUE(PSmallestValue.bitwiseIsEqual(abs(PSmallestValue)));
+  EXPECT_TRUE(PSmallestValue.bitwiseIsEqual(abs(MSmallestValue)));
+  EXPECT_TRUE(PSmallestNormalized.bitwiseIsEqual(abs(PSmallestNormalized)));
+  EXPECT_TRUE(PSmallestNormalized.bitwiseIsEqual(abs(MSmallestNormalized)));
+}
+
 TEST(APFloatTest, ilogb) {
   EXPECT_EQ(0, ilogb(APFloat(APFloat::IEEEsingle, "0x1p+0")));
   EXPECT_EQ(0, ilogb(APFloat(APFloat::IEEEsingle, "-0x1p+0")));