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Handle '.' correctly in hex float literal parsing.

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There were a couple of different loops that were not handling
'.' correctly in APFloat::convertFromHexadecimalString; these mistakes
could lead to assertion failures and incorrect rounding for overlong
hex float literals.

Fixes PR16643.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@186539 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Eli Friedman
2013-07-17 22:17:29 +00:00
parent a71443a002
commit 763c066dca
2 changed files with 26 additions and 31 deletions
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7
unittests/ADT/APFloatTest.cpp
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@@ -766,6 +766,8 @@ TEST(APFloatTest, fromDecimalString) {
EXPECT_TRUE(APFloat(APFloat::IEEEdouble, "-99e99999").isInfinity());
EXPECT_TRUE(APFloat(APFloat::IEEEdouble, "1e-99999").isPosZero());
EXPECT_TRUE(APFloat(APFloat::IEEEdouble, "-1e-99999").isNegZero());
EXPECT_EQ(2.71828, convertToDoubleFromString("2.71828"));
}
TEST(APFloatTest, fromHexadecimalString) {
@@ -849,7 +851,10 @@ TEST(APFloatTest, fromHexadecimalString) {
EXPECT_EQ(1.0625, APFloat(APFloat::IEEEdouble, "0x1.1p0").convertToDouble());
EXPECT_EQ(1.0, APFloat(APFloat::IEEEdouble, "0x1p0").convertToDouble());
EXPECT_EQ(2.71828, convertToDoubleFromString("2.71828"));
EXPECT_EQ(convertToDoubleFromString("0x1p-150"),
convertToDoubleFromString("+0x800000000000000001.p-221"));
EXPECT_EQ(2251799813685248.5,
convertToDoubleFromString("0x80000000000004000000.010p-28"));
}
TEST(APFloatTest, toString) {