Commit Graph

56 Commits

Author SHA1 Message Date
Duncan Sands
1fd63df693 Express the number of ULPs in fpaccuracy metadata as a real rather than a
rational number, eg as 2.5 rather than 5, 2.  OK'd by Peter Collingbourne.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@154387 91177308-0d34-0410-b5e6-96231b3b80d8
2012-04-10 08:22:43 +00:00
Chandler Carruth
ed7692a136 Replace the hashing functions on APInt and APFloat with overloads of the
new hash_value infrastructure, and replace their implementations using
hash_combine. This removes a complete copy of Jenkin's lookup3 hash
function (which is both significantly slower and lower quality than the
one implemented in hash_combine) along with a somewhat scary xor-only
hash function.

Now that APInt and APFloat can be passed directly to hash_combine,
simplify the rest of the LLVMContextImpl hashing to use the new
infrastructure.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@152004 91177308-0d34-0410-b5e6-96231b3b80d8
2012-03-04 12:02:57 +00:00
Jeffrey Yasskin
3d42bfbbdd Add an APFloat::convertToInt(APSInt) function that automatically manages the
memory for the result.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@135259 91177308-0d34-0410-b5e6-96231b3b80d8
2011-07-15 07:04:56 +00:00
Benjamin Kramer
2746000f4f Add APFloat::getExactInverse.
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
2011-03-30 15:42:27 +00:00
Nadav Rotem
093399cbf3 Enhance constant folding of bitcast operations on vectors of floats.
Add getAllOnesValue of FP numbers to Constants and APFloat.
Add more tests.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@125776 91177308-0d34-0410-b5e6-96231b3b80d8
2011-02-17 21:22:27 +00:00
Benjamin Kramer
38e59891ee Don't pass StringRef by reference.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@108366 91177308-0d34-0410-b5e6-96231b3b80d8
2010-07-14 22:38:02 +00:00
Chris Lattner
0ddda3b8c6 make APFloat::toString be const.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@97883 91177308-0d34-0410-b5e6-96231b3b80d8
2010-03-06 19:20:13 +00:00
John McCall
e12b73816b Teach APFloat how to create both QNaNs and SNaNs and with arbitrary-width
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
2010-02-28 02:51:25 +00:00
John McCall
6a09affdf6 Implement support for converting to string at "natural precision", and fix some
major bugs in long-precision conversion.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@92150 91177308-0d34-0410-b5e6-96231b3b80d8
2009-12-24 23:18:09 +00:00
John McCall
00e65de9d8 Add accessors for the largest-magnitude, smallest-magnitude, and
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
2009-12-24 08:56:26 +00:00
Evan Cheng
c5a75523ef Remove getIEEEFloatParts and getIEEEDoubleParts. They are not needed.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@85358 91177308-0d34-0410-b5e6-96231b3b80d8
2009-10-28 01:08:17 +00:00
Evan Cheng
99ebfa5f6c Add new APFloat methods that return sign, exp, and mantissa of ieee float and double values.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@85318 91177308-0d34-0410-b5e6-96231b3b80d8
2009-10-27 21:35:42 +00:00
Chris Lattner
cc4287a374 Add half precision floating point support (float16) to APFloat,
patch by Peter Johnson! (PR5195)


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@84239 91177308-0d34-0410-b5e6-96231b3b80d8
2009-10-16 02:13:51 +00:00
Chris Lattner
d7bd78e36e add a version of the APFloat constructor that initializes to 0.0
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@82110 91177308-0d34-0410-b5e6-96231b3b80d8
2009-09-17 01:08:43 +00:00
Anton Korobeynikov
7e844f128e Implement APInt <-> APFloat conversion for IEEE 128-bit floats.
This fixes PR2555

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@79677 91177308-0d34-0410-b5e6-96231b3b80d8
2009-08-21 22:10:30 +00:00
Oscar Fuentes
f70bc559a1 Make a declaration consistent with its definition.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@79220 91177308-0d34-0410-b5e6-96231b3b80d8
2009-08-17 04:10:20 +00:00
Erick Tryzelaar
a15d890c34 Modify APFloat to take a StringRef instead of a c string.
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
2009-08-16 23:36:19 +00:00
Mike Stump
6330084a66 Dcoument that the opauque value used to construct QNaNs is truncated
as necessary.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@72702 91177308-0d34-0410-b5e6-96231b3b80d8
2009-06-01 21:02:35 +00:00
Mike Stump
7d36d39e63 Add some documentation.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@72622 91177308-0d34-0410-b5e6-96231b3b80d8
2009-05-30 15:19:29 +00:00
Mike Stump
c5ca713b80 Add support for letting the client choose different flavors of NaNs. Testcase to be
added in clang.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@72606 91177308-0d34-0410-b5e6-96231b3b80d8
2009-05-30 03:49:43 +00:00
Dale Johannesen
ed6af24e14 Make special cases (0 inf nan) work for frem.
Besides APFloat, this involved removing code
from two places that thought they knew the
result of frem(0., x) but were wrong.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@62645 91177308-0d34-0410-b5e6-96231b3b80d8
2009-01-21 00:35:19 +00:00
Dale Johannesen
24b66a83ca Add an IEEE remainder function, which is not
fully implemented yet and not used.  This is
mainly to clarify that APFloat::mod implements
C fmod, not remainder.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@62593 91177308-0d34-0410-b5e6-96231b3b80d8
2009-01-20 18:35:05 +00:00
Misha Brukman
3a54b3dc87 Removed trailing whitespace.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@62000 91177308-0d34-0410-b5e6-96231b3b80d8
2009-01-09 19:25:42 +00:00
Dale Johannesen
23a98551ab Add a "loses information" return value to APFloat::convert
and APFloat::convertToInteger.  Restore return value to
IEEE754.  Adjust all users accordingly.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@57329 91177308-0d34-0410-b5e6-96231b3b80d8
2008-10-09 23:00:39 +00:00
Dale Johannesen
7111b02c73 Rename APFloat::convertToAPInt to bitcastToAPInt to
make it clearer what the function does.  No functional
change.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@57325 91177308-0d34-0410-b5e6-96231b3b80d8
2008-10-09 18:53:47 +00:00
Chris Lattner
f25381ed35 add convenience 'constructors'
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52908 91177308-0d34-0410-b5e6-96231b3b80d8
2008-06-30 18:02:44 +00:00
Chris Lattner
b8d0b807fc add a predicate.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@51842 91177308-0d34-0410-b5e6-96231b3b80d8
2008-06-01 18:09:04 +00:00
Dan Gohman
93c276e1c9 Add a method to APFloat to convert directly from APInt.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@47738 91177308-0d34-0410-b5e6-96231b3b80d8
2008-02-29 01:26:11 +00:00
Bill Wendling
e85fe660e4 Detabify
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@47597 91177308-0d34-0410-b5e6-96231b3b80d8
2008-02-26 10:49:39 +00:00
Ted Kremenek
1f801fa5ad Added "Profile" method to APFloat for use with FoldingSet.
Added member template "Add" to FoldingSetNodeID that allows "adding" arbitrary
objects to a profile via dispatch to FoldingSetTrait<T>::Profile().

Removed FoldingSetNodeID::AddAPFloat and FoldingSetNodeID::APInt, as their
functionality is now replaced using the above mentioned member template.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@46957 91177308-0d34-0410-b5e6-96231b3b80d8
2008-02-11 17:24:50 +00:00
Chris Lattner
7ed47a1335 Don't attribute in file headers anymore. See llvmdev for the
discussion of this change.  Boy are my fingers tired. ;-)



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@45411 91177308-0d34-0410-b5e6-96231b3b80d8
2007-12-29 19:59:42 +00:00
Chris Lattner
921f0d40ec remove dead #include.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@44711 91177308-0d34-0410-b5e6-96231b3b80d8
2007-12-08 19:06:21 +00:00
Chris Lattner
065d97e7fc remove dead #include, APInt.h already has the needed forward decls.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@44708 91177308-0d34-0410-b5e6-96231b3b80d8
2007-12-08 19:00:38 +00:00
Ted Kremenek
c47dfdde24 Implemented generic serialization of APFloat.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@43829 91177308-0d34-0410-b5e6-96231b3b80d8
2007-11-07 18:39:22 +00:00
Neil Booth
ee7ae384f5 When converting to integer, do bit manipulations in the destination
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.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@43626 91177308-0d34-0410-b5e6-96231b3b80d8
2007-11-01 22:43:37 +00:00
Chris Lattner
10c42185d8 add a nice predicate to check to see if nan
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@43304 91177308-0d34-0410-b5e6-96231b3b80d8
2007-10-24 18:54:28 +00:00
Neil Booth
e5e0194583 Consolidate logic for creating NaNs. Silence compiler warning.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@42966 91177308-0d34-0410-b5e6-96231b3b80d8
2007-10-14 10:39:51 +00:00
Neil Booth
96c7471b39 Implement correctly-rounded decimal->binary conversion, i.e. conversion
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.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@42912 91177308-0d34-0410-b5e6-96231b3b80d8
2007-10-12 16:02:31 +00:00
Dale Johannesen
a471c2ecda Next PPC long double bits. First cut at constants.
No compile-time support for constant operations yet,
just format transformations.  Make readers and
writers work.  Split constants into 2 doubles in
Legalize.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@42865 91177308-0d34-0410-b5e6-96231b3b80d8
2007-10-11 18:07:22 +00:00
Neil Booth
f16c595252 Add back convertFromSignExtendedInteger.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@42735 91177308-0d34-0410-b5e6-96231b3b80d8
2007-10-07 12:15:41 +00:00
Neil Booth
643ce59495 Reimplement convertFromUnsignedInteger so it is passed a const bignum.
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.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@42733 91177308-0d34-0410-b5e6-96231b3b80d8
2007-10-07 12:07:53 +00:00
Neil Booth
ccf596a53e convertFromInteger, as originally written, expected sign-extended
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.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@42732 91177308-0d34-0410-b5e6-96231b3b80d8
2007-10-07 11:45:55 +00:00
Neil Booth
33d4c92e78 combineLostFractions does not need to be a member function
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@42729 91177308-0d34-0410-b5e6-96231b3b80d8
2007-10-07 08:51:21 +00:00
Neil Booth
a30b0ee959 Add APFloat -> hexadecimal string conversion, as per %a and %A in C99.
Useful for diagnostics and debugging.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@42598 91177308-0d34-0410-b5e6-96231b3b80d8
2007-10-03 22:26:02 +00:00
Neil Booth
b7dea4cb36 Tweak RoundAwayFromZero the bit number below which is truncated, and make
it const.

Preparation for APFloat -> hexadecimal string conversion.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@42576 91177308-0d34-0410-b5e6-96231b3b80d8
2007-10-03 15:16:41 +00:00
Neil Booth
117acf9e36 Whitespace cleanup.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@42374 91177308-0d34-0410-b5e6-96231b3b80d8
2007-09-26 21:35:05 +00:00
Chris Lattner
8a901985bc Make single-argument ctors explicit to avoid tricky bugs :)
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@41924 91177308-0d34-0410-b5e6-96231b3b80d8
2007-09-13 06:15:57 +00:00
Dale Johannesen
3f6eb7419d Add APInt interfaces to APFloat (allows directly
access to bits).  Use them in place of float and
double interfaces where appropriate.
First bits of x86 long double constants handling 
(untested, probably does not work).



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@41858 91177308-0d34-0410-b5e6-96231b3b80d8
2007-09-11 18:32:33 +00:00
Chuck Rose III
418d360518 Fix for VisualStudio. It is treating a 2 bit enum as a signed int for comparison purposes, causing failures. Using an extra bit fixes it.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@41784 91177308-0d34-0410-b5e6-96231b3b80d8
2007-09-08 04:17:08 +00:00
Dale Johannesen
c4dd3c3b51 Add mod, copysign, abs operations to APFloat.
Implement some constant folding in SelectionDAG and
DAGCombiner using APFloat.  Remove double versions
of constructor and getValue from ConstantFPSDNode.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@41664 91177308-0d34-0410-b5e6-96231b3b80d8
2007-08-31 23:34:27 +00:00