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* Handle 0 correctly in string->APFloat conversion.Dale Johannesen2007-12-051-1/+1
| | | | llvm-svn: 44594
* Fix PR1816, by correcting the broken definition of APInt::countTrailingZeros.Chris Lattner2007-11-231-1/+1
| | | | llvm-svn: 44296
* Fix APInt::countTrailingZeros to return BitWidth if the input is zero ↵Chris Lattner2007-11-231-2/+2
| | | | | | instead of returning some random large number. llvm-svn: 44294
* Fix the Linker testcase regressions, by making MemoryBuffer::getFileOrSTDIN ↵Chris Lattner2007-11-181-0/+18
| | | | | | | | return a valid but empty buffer if stdin is empty. llvm-svn: 44219
* Fix denormal check in float->APInt conversion.Dale Johannesen2007-11-171-1/+1
| | | | | | PR 1804. llvm-svn: 44201
* make smallptrset more const and type correct, which caught a fewChris Lattner2007-11-061-2/+2
| | | | | | minor bugs. llvm-svn: 43782
* Remove some unnecessary C-style statics.Neil Booth2007-11-021-6/+8
| | | | | | Restore an assertion that arithmetic can be performed on this format. llvm-svn: 43638
* Add back line whose removal somehow crept into prior patchNeil Booth2007-11-011-0/+1
| | | | llvm-svn: 43627
* When converting to integer, do bit manipulations in the destinationNeil Booth2007-11-011-71/+107
| | | | | | | | | | | memory rather than in a copy of the APFloat. This avoids problems when the destination is wider than our significand and is cleaner. Also provide deterministic values in all cases where conversion fails, namely zero for NaNs and the minimal or maximal value respectively for underflow or overflow. llvm-svn: 43626
* Clarified operator precedence.Hartmut Kaiser2007-10-251-2/+2
| | | | | | Silenced VC++ warning. llvm-svn: 43372
* This requires rtti info because tblgen uses commandline,Chris Lattner2007-10-181-1/+4
| | | | | | and tblgen requires rtti. llvm-svn: 43127
* Fast-track obviously over-large and over-small exponents during decimal->Neil Booth2007-10-151-8/+44
| | | | | | | | | | integer conversion. In some such cases this makes us one or two orders of magnitude faster than NetBSD's libc. Glibc seems to have a similar fast path. Also, tighten up some upper bounds to save a bit of memory. llvm-svn: 42984
* Consolidate logic for creating NaNs. Silence compiler warning.Neil Booth2007-10-141-10/+15
| | | | llvm-svn: 42966
* Whether arithmetic is supported is a property of the semantics. Make itNeil Booth2007-10-141-41/+36
| | | | | | so, and clean up the checks by putting them in an inline function. llvm-svn: 42965
* Separate out parsing of decimal number. Use this to only allocateNeil Booth2007-10-141-97/+150
| | | | | | | memory for the significand once up-front. Also ignore insignificant trailing zeroes; this saves unnecessary multiplications later. llvm-svn: 42964
* If the power of 5 is exact, and the reciprocal exact, the error is zero not ↵Neil Booth2007-10-131-1/+1
| | | | | | one half-ulps. This prevents an infinite loop in rare cases. llvm-svn: 42950
* Remove duplicate comment.Neil Booth2007-10-121-11/+0
| | | | llvm-svn: 42913
* Implement correctly-rounded decimal->binary conversion, i.e. conversionNeil Booth2007-10-121-6/+349
| | | | | | | | | | | from user input strings. Such conversions are more intricate and subtle than they may appear; it is unlikely I have got it completely right first time. I would appreciate being informed of any bugs and incorrect roundings you might discover. llvm-svn: 42912
* Remove a field that was never used.Neil Booth2007-10-121-9/+6
| | | | llvm-svn: 42911
* If we're trying to be arbitrary precision, unsigned char clearly won't cut ↵Neil Booth2007-10-121-1/+1
| | | | | | it. Needed for dec->bin conversions. llvm-svn: 42910
* Don't attempt to mask no bitsNeil Booth2007-10-121-1/+2
| | | | llvm-svn: 42909
* Next PPC long double bits. First cut at constants.Dale Johannesen2007-10-111-6/+157
| | | | | | | | | No compile-time support for constant operations yet, just format transformations. Make readers and writers work. Split constants into 2 doubles in Legalize. llvm-svn: 42865
* Add new MemoryBuffer::getMemBufferCopy method.Chris Lattner2007-10-091-2/+15
| | | | llvm-svn: 42815
* Pass argc by value, not by reference, since it isn't modified.Dan Gohman2007-10-091-1/+1
| | | | llvm-svn: 42788
* Change a #include into a forward declarationChris Lattner2007-10-091-0/+1
| | | | llvm-svn: 42781
* Move the space in overview output for commands out of each of theDan Gohman2007-10-081-1/+1
| | | | | | commands and into the common code. llvm-svn: 42752
* Use APInt::tcExtract. It's cleaner, and works :)Neil Booth2007-10-081-19/+14
| | | | llvm-svn: 42746
* Add a new function tcExtract for extracting a bignum from anNeil Booth2007-10-081-34/+76
| | | | | | | | | | | | | arbitrary range of bits embedded in the middle of another bignum. This kind of operation is desirable in many cases of software floating point, e.g. converting bignum integers to floating point numbers of fixed precision (you want to extract the precision most significant bits). Elsewhere, add an assertion, and exit the shift functions early if the shift count is zero. llvm-svn: 42745
* Add back convertFromSignExtendedInteger.Neil Booth2007-10-071-0/+30
| | | | llvm-svn: 42735
* Now that convertFromUnsignedParts has a sane, constant interface,Neil Booth2007-10-071-5/+1
| | | | | | | convertFromZeroExtendedInteger can be simplified as it doesn't need to make a copy of the source bignum. llvm-svn: 42734
* Reimplement convertFromUnsignedInteger so it is passed a const bignum.Neil Booth2007-10-071-18/+29
| | | | | | | | | It used to modify its argument in-place. This interface is saner and the implementation more efficient. It will be needed for decimal->binary conversion. llvm-svn: 42733
* convertFromInteger, as originally written, expected sign-extendedNeil Booth2007-10-071-4/+6
| | | | | | | | input. APInt unfortunately zero-extends signed integers, so Dale modified the function to expect zero-extended input. Make this assumption explicit in the function name. llvm-svn: 42732
* combineLostFractions does not need to be a member functionNeil Booth2007-10-071-16/+15
| | | | llvm-svn: 42729
* Cleaner, more general exponent output.Neil Booth2007-10-061-21/+22
| | | | llvm-svn: 42690
* silence warnings in no-assert build.Chris Lattner2007-10-061-23/+20
| | | | llvm-svn: 42687
* Fix and clarify some comments.Neil Booth2007-10-061-12/+12
| | | | llvm-svn: 42670
* Generalize tcFullMultiply so that the operands can be of differingNeil Booth2007-10-062-16/+24
| | | | | | | | part widths. Also, return the number of parts actually required to hold the result's value. Remove an over-cautious condition from rounding of float->hex conversion. llvm-svn: 42669
* Add APFloat -> hexadecimal string conversion, as per %a and %A in C99.Neil Booth2007-10-031-3/+240
| | | | | | Useful for diagnostics and debugging. llvm-svn: 42598
* Add initial iterator support for folding set.Chris Lattner2007-10-031-0/+32
| | | | llvm-svn: 42589
* Simplify implementation of the FoldingSet circular list, a necessary stepChris Lattner2007-10-031-11/+20
| | | | | | to giving it iterators. llvm-svn: 42586
* Tweak RoundAwayFromZero the bit number below which is truncated, and makeNeil Booth2007-10-031-8/+13
| | | | | | | | it const. Preparation for APFloat -> hexadecimal string conversion. llvm-svn: 42576
* Simplify and fix signed int -> FP conversions.Dale Johannesen2007-09-301-11/+3
| | | | llvm-svn: 42483
* Whitespace and compiler warning cleanup.Neil Booth2007-09-261-76/+91
| | | | llvm-svn: 42373
* Make APFloat->int conversions deterministic even inDale Johannesen2007-09-251-5/+33
| | | | | | cases with undefined behavior. llvm-svn: 42328
* Fix long double<->shorter FP type conversionsDale Johannesen2007-09-251-12/+29
| | | | | | of zero, infinity, and NaNs. llvm-svn: 42298
* Handle storage complications of float->float conversions.Neil Booth2007-09-221-18/+23
| | | | llvm-svn: 42220
* Change APFloat::convertFromInteger to take the incomingDale Johannesen2007-09-212-17/+20
| | | | | | | | | | bit width instead of number of words allocated, which makes it actually work for int->APF conversions. Adjust callers. Add const to one of the APInt constructors to prevent surprising match when called with const argument. llvm-svn: 42210
* Fix PR 1688. See comments there.Dale Johannesen2007-09-201-13/+25
| | | | llvm-svn: 42181
* Do not hide APInt::dump() inside #ifndef NDEBUG.Devang Patel2007-09-171-4/+0
| | | | llvm-svn: 42068
* fix a gcc warning: comparison between signed and unsigned integer expressionsChris Lattner2007-09-141-1/+1
| | | | llvm-svn: 41972
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