unittests/ADT/APFloatTest.cpp

   1 //===- llvm/unittest/ADT/APFloat.cpp - APFloat unit tests ---------------------===//
   2 //
   3 //                     The LLVM Compiler Infrastructure
   4 //
   5 // This file is distributed under the University of Illinois Open Source
   6 // License. See LICENSE.TXT for details.
   7 //
   8 //===----------------------------------------------------------------------===//
   9
  10 #include <ostream>
  11 #include "llvm/Support/raw_ostream.h"
  12 #include "gtest/gtest.h"
  13 #include "llvm/ADT/APFloat.h"
  14 #include "llvm/ADT/SmallString.h"
  15
  16 using namespace llvm;
  17
  18 namespace {
  19
  20 TEST(APFloatTest, Zero) {
  21   EXPECT_EQ(0.0f,  APFloat(APFloat::IEEEsingle,  0.0f).convertToFloat());
  22   EXPECT_EQ(-0.0f, APFloat(APFloat::IEEEsingle, -0.0f).convertToFloat());
  23
  24   EXPECT_EQ(0.0,  APFloat(APFloat::IEEEdouble,  0.0).convertToDouble());
  25   EXPECT_EQ(-0.0, APFloat(APFloat::IEEEdouble, -0.0).convertToDouble());
  26 }
  27
  28 TEST(APFloatTest, fromString) {
  29   EXPECT_EQ(0.0,  APFloat(APFloat::IEEEdouble, "0").convertToDouble());
  30   EXPECT_EQ(0.0,  APFloat(APFloat::IEEEdouble, "0.").convertToDouble());
  31   EXPECT_EQ(0.0,  APFloat(APFloat::IEEEdouble, ".0").convertToDouble());
  32   EXPECT_EQ(0.0,  APFloat(APFloat::IEEEdouble, "0.0").convertToDouble());
  33   EXPECT_EQ(-0.0, APFloat(APFloat::IEEEdouble, "-0").convertToDouble());
  34   EXPECT_EQ(-0.0, APFloat(APFloat::IEEEdouble, "-0.").convertToDouble());
  35   EXPECT_EQ(-0.0, APFloat(APFloat::IEEEdouble, "-.0").convertToDouble());
  36   EXPECT_EQ(-0.0, APFloat(APFloat::IEEEdouble, "-0.0").convertToDouble());
  37   EXPECT_EQ(0.0,  APFloat(APFloat::IEEEdouble, "0e1234").convertToDouble());
  38   EXPECT_EQ(0.0,  APFloat(APFloat::IEEEdouble, "0e1234").convertToDouble());
  39   EXPECT_EQ(0.0,  APFloat(APFloat::IEEEdouble, "00000.").convertToDouble());
  40   EXPECT_EQ(0.0,  APFloat(APFloat::IEEEdouble, "0000.00000").convertToDouble());
  41   EXPECT_EQ(0.0,  APFloat(APFloat::IEEEdouble, ".00000").convertToDouble());
  42   EXPECT_EQ(0.0,  APFloat(APFloat::IEEEdouble, "0.").convertToDouble());
  43   EXPECT_EQ(0.0,  APFloat(APFloat::IEEEdouble, "0.e1").convertToDouble());
  44   EXPECT_EQ(0.0,  APFloat(APFloat::IEEEdouble, "0.e+1").convertToDouble());
  45   EXPECT_EQ(0.0,  APFloat(APFloat::IEEEdouble, "0.e-1").convertToDouble());
  46   EXPECT_EQ(0.0,  APFloat(APFloat::IEEEdouble, "000.0000e0").convertToDouble());
  47   EXPECT_EQ(0.0,  APFloat(APFloat::IEEEdouble, "000.0000e-0").convertToDouble());
  48   EXPECT_EQ(0.0,  APFloat(APFloat::IEEEdouble, "000.0000e1234").convertToDouble());
  49   EXPECT_EQ(0.0,  APFloat(APFloat::IEEEdouble, "000.0000e-1234").convertToDouble());
  50
  51   EXPECT_EQ(0.0,  APFloat(APFloat::IEEEdouble, "0x0p1").convertToDouble());
  52   EXPECT_EQ(-0.0, APFloat(APFloat::IEEEdouble, "-0x0p1").convertToDouble());
  53   EXPECT_EQ(0.0,  APFloat(APFloat::IEEEdouble, "0x00000.p1").convertToDouble());
  54   EXPECT_EQ(0.0,  APFloat(APFloat::IEEEdouble, "0x0000.00000p1").convertToDouble());
  55   EXPECT_EQ(0.0,  APFloat(APFloat::IEEEdouble, "0x.00000p1").convertToDouble());
  56   EXPECT_EQ(0.0,  APFloat(APFloat::IEEEdouble, "0x0.p1").convertToDouble());
  57   EXPECT_EQ(0.0,  APFloat(APFloat::IEEEdouble, "0x0p1234").convertToDouble());
  58   EXPECT_EQ(-0.0, APFloat(APFloat::IEEEdouble, "-0x0p1234").convertToDouble());
  59   EXPECT_EQ(0.0,  APFloat(APFloat::IEEEdouble, "0x00000.p1234").convertToDouble());
  60   EXPECT_EQ(0.0,  APFloat(APFloat::IEEEdouble, "0x0000.00000p1234").convertToDouble());
  61   EXPECT_EQ(0.0,  APFloat(APFloat::IEEEdouble, "0x.00000p1234").convertToDouble());
  62   EXPECT_EQ(0.0,  APFloat(APFloat::IEEEdouble, "0x0.p1234").convertToDouble());
  63   EXPECT_EQ(1.0625,  APFloat(APFloat::IEEEdouble, "0x1.1p0").convertToDouble());
  64   EXPECT_EQ(1.0,  APFloat(APFloat::IEEEdouble, "0x1p0").convertToDouble());
  65
  66   EXPECT_EQ(0.0,  APFloat(APFloat::IEEEdouble, StringRef("0e1\02", 3)).convertToDouble());
  67 }
  68
  69 #ifdef GTEST_HAS_DEATH_TEST
  70 TEST(APFloatTest, SemanticsDeath) {
  71   EXPECT_DEATH(APFloat(APFloat::IEEEsingle, 0.0f).convertToDouble(), "Float semantics are not IEEEdouble");
  72   EXPECT_DEATH(APFloat(APFloat::IEEEdouble, 0.0 ).convertToFloat(),  "Float semantics are not IEEEsingle");
  73 }
  74
  75 TEST(APFloatTest, StringDeath) {
  76   EXPECT_DEATH(APFloat(APFloat::IEEEdouble, ""), "Invalid string length");
  77   EXPECT_DEATH(APFloat(APFloat::IEEEdouble, "-"), "String is only a minus!");
  78   EXPECT_DEATH(APFloat(APFloat::IEEEdouble, "0x"), "Invalid string");
  79   EXPECT_DEATH(APFloat(APFloat::IEEEdouble, "."), "String cannot be just a dot");
  80   EXPECT_DEATH(APFloat(APFloat::IEEEdouble, "-."), "String cannot be just a dot");
  81   EXPECT_DEATH(APFloat(APFloat::IEEEdouble, "0x."), "String cannot be just a dot");
  82   EXPECT_DEATH(APFloat(APFloat::IEEEdouble, "-0x."),"String cannot be just a dot");
  83   EXPECT_DEATH(APFloat(APFloat::IEEEdouble, "0x0"), "Hex strings require an exponent");
  84   EXPECT_DEATH(APFloat(APFloat::IEEEdouble, "0e"), "Exponent has no digits");
  85   EXPECT_DEATH(APFloat(APFloat::IEEEdouble, "0e+"), "Exponent has no digits");
  86   EXPECT_DEATH(APFloat(APFloat::IEEEdouble, "0e-"), "Exponent has no digits");
  87
  88   EXPECT_DEATH(APFloat(APFloat::IEEEdouble, StringRef("\0", 1)), "Invalid character in digit string");
  89   EXPECT_DEATH(APFloat(APFloat::IEEEdouble, StringRef("1\0", 2)), "Invalid character in digit string");
  90   EXPECT_DEATH(APFloat(APFloat::IEEEdouble, StringRef("1\02", 3)), "Invalid character in digit string");
  91   EXPECT_DEATH(APFloat(APFloat::IEEEdouble, StringRef("1\02e1", 5)), "Invalid character in digit string");
  92   EXPECT_DEATH(APFloat(APFloat::IEEEdouble, StringRef("1e\0", 3)), "Invalid character in exponent");
  93   EXPECT_DEATH(APFloat(APFloat::IEEEdouble, StringRef("1e1\0", 4)), "Invalid character in exponent");
  94   EXPECT_DEATH(APFloat(APFloat::IEEEdouble, StringRef("1e1\02", 5)), "Invalid character in exponent");
  95
  96   EXPECT_DEATH(APFloat(APFloat::IEEEdouble, "1.0f"), "Invalid character in digit string");
  97
  98   EXPECT_DEATH(APFloat(APFloat::IEEEdouble, StringRef("0x\0", 3)), "Hex strings require an exponent");
  99   EXPECT_DEATH(APFloat(APFloat::IEEEdouble, StringRef("0x1\0", 4)), "Hex strings require an exponent");
 100   EXPECT_DEATH(APFloat(APFloat::IEEEdouble, StringRef("0x1\02", 5)), "Hex strings require an exponent");
 101   EXPECT_DEATH(APFloat(APFloat::IEEEdouble, StringRef("0x1\02p1", 7)), "Hex strings require an exponent");
 102   EXPECT_DEATH(APFloat(APFloat::IEEEdouble, StringRef("0x1p\0", 5)), "Invalid character in exponent");
 103   EXPECT_DEATH(APFloat(APFloat::IEEEdouble, StringRef("0x1p1\0", 6)), "Invalid character in exponent");
 104   EXPECT_DEATH(APFloat(APFloat::IEEEdouble, StringRef("0x1p1\02", 7)), "Invalid character in exponent");
 105
 106   EXPECT_DEATH(APFloat(APFloat::IEEEdouble, "0x1p0f"), "Invalid character in exponent");
 107 }
 108 #endif
 109
 110 }