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path: root/unittests/ADT/APFloatTest.cpp
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2013-01-25APFloat: Make sure that we get a well-formed x87 NaN when converting from a ↵Benjamin Kramer
smaller type. Fixes PR15054. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@173459 91177308-0d34-0410-b5e6-96231b3b80d8
2013-01-07Implement APFloat::isDenormal()Shuxin Yang
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@171764 91177308-0d34-0410-b5e6-96231b3b80d8
2012-12-04Sort the #include lines for unittest/...Chandler Carruth
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@169250 91177308-0d34-0410-b5e6-96231b3b80d8
2012-11-08Drop the limitation to IEEE floating point types from the fdiv of pow2 -> ↵Benjamin Kramer
fmul transform. This is safe for x87 long doubles and ppc double doubles too. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@167582 91177308-0d34-0410-b5e6-96231b3b80d8
2012-10-29Implement arithmetic on APFloat with PPCDoubleDouble semantics byUlrich Weigand
treating it as if it were an IEEE floating-point type with 106-bit mantissa. This makes compile-time arithmetic on "long double" for PowerPC in clang (in particular parsing of floating point constants) work, and fixes all "long double" related failures in the test suite. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@166951 91177308-0d34-0410-b5e6-96231b3b80d8
2012-09-26APFloat::roundToIntegral: Special values don't keep the exponent value up to ↵Benjamin Kramer
date, don't rely on it. Add a couple of unit tests for special floats. Fixes 13929, found by MemorySanitizer. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@164698 91177308-0d34-0410-b5e6-96231b3b80d8
2012-08-15Fix another roundToIntegral bug where very large values could become ↵Owen Anderson
infinity. Problem and solution identified by Steve Canon. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@161969 91177308-0d34-0410-b5e6-96231b3b80d8
2012-08-15Fix a problem with APFloat::roundToIntegral where it would return incorrect ↵Owen Anderson
results for negative inputs to trunc. Add unit tests to verify this behavior. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@161929 91177308-0d34-0410-b5e6-96231b3b80d8
2011-11-26Fix APFloat::convert so that it handles narrowing conversions correctly; itEli Friedman
was returning incorrect values in rare cases, and incorrectly marking exact conversions as inexact in some more common cases. Fixes PR11406, and a missed optimization in test/CodeGen/X86/fp-stack-O0.ll. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@145141 91177308-0d34-0410-b5e6-96231b3b80d8
2011-10-12Attempt to fix MSVC build.Eli Friedman
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@141831 91177308-0d34-0410-b5e6-96231b3b80d8
2011-10-12Fix APFloat::getLargest so that it actually returns the correct value. ↵Eli Friedman
Found by accident while reviewing a patch to nearby code. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@141816 91177308-0d34-0410-b5e6-96231b3b80d8
2011-08-29Fix a test that wasn't testing the right thing.Matt Beaumont-Gay
The APFloat "Zero" test was actually calling the APFloat(const fltSemantics &, integerPart) constructor, and EXPECT_EQ was treating 0 and -0 as equal. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@138745 91177308-0d34-0410-b5e6-96231b3b80d8
2011-07-15Add an APFloat::convertToInt(APSInt) function that automatically manages theJeffrey Yasskin
memory for the result. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@135259 91177308-0d34-0410-b5e6-96231b3b80d8
2011-03-30Avoid turning a floating point division with a constant power of two into a ↵Benjamin Kramer
denormal multiplication. Some platforms may treat denormals as zero, on other platforms multiplication with a subnormal is slower than dividing by a normal. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@128555 91177308-0d34-0410-b5e6-96231b3b80d8
2011-03-30Add APFloat::getExactInverse.Benjamin Kramer
The idea is, that if an ieee 754 float is divided by a power of two, we can turn the division into a cheaper multiplication. This function sees if we can get an exact multiplicative inverse for a divisor and returns it if possible. This is the hard part of PR9587. I tested many inputs against llvm-gcc's frotend implementation of this optimization and didn't find any difference. However, floating point is the land of weird edge cases, so any review would be appreciated. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@128545 91177308-0d34-0410-b5e6-96231b3b80d8
2010-03-17Fix death tests in -Asserts builds.Jeffrey Yasskin
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@98701 91177308-0d34-0410-b5e6-96231b3b80d8
2010-02-28Teach APFloat how to create both QNaNs and SNaNs and with arbitrary-widthJohn McCall
payloads. APFloat's internal folding routines always make QNaNs now, instead of sometimes making QNaNs and sometimes SNaNs depending on the type. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@97364 91177308-0d34-0410-b5e6-96231b3b80d8
2010-02-26Make APFloat's string-parsing routines a bit safer against very large exponents.John McCall
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@97278 91177308-0d34-0410-b5e6-96231b3b80d8
2010-02-03Make APInt::countLeadingZerosSlowCase() treat the contents of padding bitsJohn McCall
as undefined. Fixes an assertion in APFloat::toString noticed by Dale. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@95196 91177308-0d34-0410-b5e6-96231b3b80d8
2009-12-24Implement support for converting to string at "natural precision", and fix someJohn McCall
major bugs in long-precision conversion. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@92150 91177308-0d34-0410-b5e6-96231b3b80d8
2009-12-24Add accessors for the largest-magnitude, smallest-magnitude, andJohn McCall
smallest-normalized-magnitude values in a given FP semantics. Provide an APFloat-to-string conversion which I am quite ready to admit could be much more efficient. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@92126 91177308-0d34-0410-b5e6-96231b3b80d8
2009-09-03Add test for PR4873, which works for me.Daniel Dunbar
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@80965 91177308-0d34-0410-b5e6-96231b3b80d8
2009-08-20Add support for including '+' in APFloat strings, more asserts,Erick Tryzelaar
and many new unit tests. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@79574 91177308-0d34-0410-b5e6-96231b3b80d8
2009-08-20Fix two APFloat bugs in converting hexadecimal constants.Daniel Dunbar
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@79540 91177308-0d34-0410-b5e6-96231b3b80d8
2009-08-17Wrap unit test death tests in GTEST_HAS_DEATH_TESTErick Tryzelaar
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@79218 91177308-0d34-0410-b5e6-96231b3b80d8
2009-08-17Change APFloatTest from using ASSERTs to EXPECTsErick Tryzelaar
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@79216 91177308-0d34-0410-b5e6-96231b3b80d8
2009-08-16Modify APFloat to take a StringRef instead of a c string.Erick Tryzelaar
This also adds unit tests to APFloat that mainly tests the string handling of APFloat, but not much else of it's api. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@79210 91177308-0d34-0410-b5e6-96231b3b80d8
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