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[APFloat] Added a unittest for APFloat::getZero.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@183028 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Michael Gottesman 2013-05-31 18:43:34 +00:00
parent 5b00f4edcb
commit 504e2da08c
1 changed files with 37 additions and 0 deletions

37
unittests/ADT/APFloatTest.cpp

@ -1274,6 +1274,43 @@ TEST(APFloatTest, getSmallestNormalized) {
EXPECT_TRUE(test.bitwiseIsEqual(expected));
}
TEST(APFloatTest, getZero) {
struct {
const fltSemantics *semantics;
const bool sign;
const unsigned long long bitPattern[2];
const unsigned bitPatternLength;
} GetZeroTest[] = {
{ &APFloat::IEEEhalf, false, {0, 0}, 1},
{ &APFloat::IEEEhalf, true, {0x8000, 0}, 1},
{ &APFloat::IEEEsingle, false, {0, 0}, 1},
{ &APFloat::IEEEsingle, true, {0x80000000, 0}, 1},
{ &APFloat::IEEEdouble, false, {0, 0}, 1},
{ &APFloat::IEEEdouble, true, {0x8000000000000000, 0}, 1},
{ &APFloat::IEEEquad, false, {0, 0}, 2},
{ &APFloat::IEEEquad, true, {0, 0x8000000000000000}, 2},
{ &APFloat::PPCDoubleDouble, false, {0, 0}, 2},
{ &APFloat::PPCDoubleDouble, true, {0x8000000000000000, 0}, 2},
{ &APFloat::x87DoubleExtended, false, {0, 0}, 2},
{ &APFloat::x87DoubleExtended, true, {0, 0x8000}, 2},
};
const unsigned NumGetZeroTests = 12;
for (unsigned i = 0; i < NumGetZeroTests; ++i) {
APFloat test = APFloat::getZero(*GetZeroTest[i].semantics,
GetZeroTest[i].sign);
const char *pattern = GetZeroTest[i].sign? "-0x0p+0" : "0x0p+0";
APFloat expected = APFloat(*GetZeroTest[i].semantics,
pattern);
EXPECT_TRUE(test.isZero());
EXPECT_TRUE(GetZeroTest[i].sign? test.isNegative() : !test.isNegative());
EXPECT_TRUE(test.bitwiseIsEqual(expected));
for (unsigned j = 0, je = GetZeroTest[i].bitPatternLength; j < je; ++j) {
EXPECT_EQ(GetZeroTest[i].bitPattern[j],
test.bitcastToAPInt().getRawData()[j]);
}
}
}
TEST(APFloatTest, convert) {
bool losesInfo;
APFloat test(APFloat::IEEEdouble, "1.0");