X-Git-Url: http://demsky.eecs.uci.edu/git/?a=blobdiff_plain;f=unittests%2FADT%2FAPFloatTest.cpp;h=964b04da473c19b475417ba782bb7b9c70241ae0;hb=a75ce9f5d2236d93c117e861e60e6f3f748c9555;hp=92f020b382d472372625840ef70d7f00211b787c;hpb=83fecfa42ce0453a723d37fa46e23c391e4bd6a3;p=oota-llvm.git

diff --git a/unittests/ADT/APFloatTest.cpp b/unittests/ADT/APFloatTest.cpp
index 92f020b382d..964b04da473 100644
--- a/unittests/ADT/APFloatTest.cpp
+++ b/unittests/ADT/APFloatTest.cpp
@@ -8,10 +8,12 @@
 //===----------------------------------------------------------------------===//
 
 #include <ostream>
+#include <string>
 #include "llvm/Support/raw_ostream.h"
 #include "gtest/gtest.h"
 #include "llvm/ADT/APFloat.h"
 #include "llvm/ADT/SmallString.h"
+#include "llvm/ADT/SmallVector.h"
 
 using namespace llvm;
 
@@ -21,6 +23,13 @@ static double convertToDoubleFromString(const char *Str) {
   return F.convertToDouble();
 }
 
+static std::string convertToString(double d, unsigned Prec, unsigned Pad) {
+  llvm::SmallVector<char, 100> Buffer;
+  llvm::APFloat F(d);
+  F.toString(Buffer, Prec, Pad);
+  return std::string(Buffer.data(), Buffer.size());
+}
+
 namespace {
 
 TEST(APFloatTest, Zero) {
@@ -227,6 +236,13 @@ TEST(APFloatTest, fromDecimalString) {
   EXPECT_EQ(2.05e12,   APFloat(APFloat::IEEEdouble, "002.05000e12").convertToDouble());
   EXPECT_EQ(2.05e+12,  APFloat(APFloat::IEEEdouble, "002.05000e+12").convertToDouble());
   EXPECT_EQ(2.05e-12,  APFloat(APFloat::IEEEdouble, "002.05000e-12").convertToDouble());
+
+  // These are "carefully selected" to overflow the fast log-base
+  // calculations in APFloat.cpp
+  EXPECT_TRUE(APFloat(APFloat::IEEEdouble, "99e99999").isInfinity());
+  EXPECT_TRUE(APFloat(APFloat::IEEEdouble, "-99e99999").isInfinity());
+  EXPECT_TRUE(APFloat(APFloat::IEEEdouble, "1e-99999").isPosZero());
+  EXPECT_TRUE(APFloat(APFloat::IEEEdouble, "-1e-99999").isNegZero());
 }
 
 TEST(APFloatTest, fromHexadecimalString) {
@@ -313,7 +329,52 @@ TEST(APFloatTest, fromHexadecimalString) {
   EXPECT_EQ(2.71828, convertToDoubleFromString("2.71828"));
 }
 
+TEST(APFloatTest, toString) {
+  ASSERT_EQ("10", convertToString(10.0, 6, 3));
+  ASSERT_EQ("1.0E+1", convertToString(10.0, 6, 0));
+  ASSERT_EQ("10100", convertToString(1.01E+4, 5, 2));
+  ASSERT_EQ("1.01E+4", convertToString(1.01E+4, 4, 2));
+  ASSERT_EQ("1.01E+4", convertToString(1.01E+4, 5, 1));
+  ASSERT_EQ("0.0101", convertToString(1.01E-2, 5, 2));
+  ASSERT_EQ("0.0101", convertToString(1.01E-2, 4, 2));
+  ASSERT_EQ("1.01E-2", convertToString(1.01E-2, 5, 1));
+  ASSERT_EQ("0.7853981633974483", convertToString(0.78539816339744830961, 0, 3));
+  ASSERT_EQ("4.940656458412465E-324", convertToString(4.9406564584124654e-324, 0, 3));
+  ASSERT_EQ("873.1834", convertToString(873.1834, 0, 1));
+  ASSERT_EQ("8.731834E+2", convertToString(873.1834, 0, 0));
+}
+
+static APInt nanbits(const fltSemantics &Sem,
+                     bool SNaN, bool Negative, uint64_t fill) {
+  APInt apfill(64, fill);
+  if (SNaN)
+    return APFloat::getSNaN(Sem, Negative, &apfill).bitcastToAPInt();
+  else
+    return APFloat::getQNaN(Sem, Negative, &apfill).bitcastToAPInt();
+}
+
+TEST(APFloatTest, makeNaN) {
+  ASSERT_EQ(0x7fc00000, nanbits(APFloat::IEEEsingle, false, false, 0));
+  ASSERT_EQ(0xffc00000, nanbits(APFloat::IEEEsingle, false, true, 0));
+  ASSERT_EQ(0x7fc0ae72, nanbits(APFloat::IEEEsingle, false, false, 0xae72));
+  ASSERT_EQ(0x7fffae72, nanbits(APFloat::IEEEsingle, false, false, 0xffffae72));
+  ASSERT_EQ(0x7fa00000, nanbits(APFloat::IEEEsingle, true, false, 0));
+  ASSERT_EQ(0xffa00000, nanbits(APFloat::IEEEsingle, true, true, 0));
+  ASSERT_EQ(0x7f80ae72, nanbits(APFloat::IEEEsingle, true, false, 0xae72));
+  ASSERT_EQ(0x7fbfae72, nanbits(APFloat::IEEEsingle, true, false, 0xffffae72));
+
+  ASSERT_EQ(0x7ff8000000000000ULL, nanbits(APFloat::IEEEdouble, false, false, 0));
+  ASSERT_EQ(0xfff8000000000000ULL, nanbits(APFloat::IEEEdouble, false, true, 0));
+  ASSERT_EQ(0x7ff800000000ae72ULL, nanbits(APFloat::IEEEdouble, false, false, 0xae72));
+  ASSERT_EQ(0x7fffffffffffae72ULL, nanbits(APFloat::IEEEdouble, false, false, 0xffffffffffffae72ULL));
+  ASSERT_EQ(0x7ff4000000000000ULL, nanbits(APFloat::IEEEdouble, true, false, 0));
+  ASSERT_EQ(0xfff4000000000000ULL, nanbits(APFloat::IEEEdouble, true, true, 0));
+  ASSERT_EQ(0x7ff000000000ae72ULL, nanbits(APFloat::IEEEdouble, true, false, 0xae72));
+  ASSERT_EQ(0x7ff7ffffffffae72ULL, nanbits(APFloat::IEEEdouble, true, false, 0xffffffffffffae72ULL));
+}
+
 #ifdef GTEST_HAS_DEATH_TEST
+#ifndef NDEBUG
 TEST(APFloatTest, SemanticsDeath) {
   EXPECT_DEATH(APFloat(APFloat::IEEEsingle, 0.0f).convertToDouble(), "Float semantics are not IEEEdouble");
   EXPECT_DEATH(APFloat(APFloat::IEEEdouble, 0.0 ).convertToFloat(),  "Float semantics are not IEEEsingle");
@@ -513,5 +574,6 @@ TEST(APFloatTest, StringHexadecimalExponentDeath) {
   EXPECT_DEATH(APFloat(APFloat::IEEEdouble, "-0x1.1p-"), "Exponent has no digits");
 }
 #endif
+#endif
 
 }