Commit Graph

110 Commits

Author SHA1 Message Date
Abramo Bagnara a41d7aebee Fixed parsing of hex floats.
llvm-svn: 122963
2011-01-06 16:55:14 +00:00
Jay Foad 583abbc4df PR5207: Change APInt methods trunc(), sext(), zext(), sextOrTrunc() and
zextOrTrunc(), and APSInt methods extend(), extOrTrunc() and new method
trunc(), to be const and to return a new value instead of modifying the
object in place.

llvm-svn: 121120
2010-12-07 08:25:19 +00:00
Jay Foad 3447fb01c0 PR5207: change APInt::doubleToBits() and APInt::floatToBits() to be
static methods that return a new APInt.

llvm-svn: 120261
2010-11-28 21:04:48 +00:00
Dale Johannesen 370c77c064 Do not assert when reading an exponent out of range.
llvm-svn: 111534
2010-08-19 17:58:35 +00:00
Benjamin Kramer 92d8998348 Don't pass StringRef by reference.
llvm-svn: 108366
2010-07-14 22:38:02 +00:00
Dan Gohman b452d4e9e4 Fix minor style issues.
llvm-svn: 99414
2010-03-24 19:38:02 +00:00
Chris Lattner 4c1e4db3ff make APFloat::toString be const.
llvm-svn: 97883
2010-03-06 19:20:13 +00:00
John McCall c6dbe30e88 Don't potentially read past the end of the fill data when making a NaN from
an APInt.

llvm-svn: 97467
2010-03-01 18:38:45 +00:00
John McCall c12b133d00 Properly clear all the extra bits in a significand when making a NaN from an
APInt.  Be certain to set the integer bit in an x87 extended-precision
significand so that we don't accidentally make a pseudo-NaN.

llvm-svn: 97382
2010-02-28 12:49:50 +00:00
John McCall dcb9a7ad3d 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.

llvm-svn: 97364
2010-02-28 02:51:25 +00:00
John McCall b42cc681ba Make APFloat's string-parsing routines a bit safer against very large exponents.
llvm-svn: 97278
2010-02-26 22:20:41 +00:00
John McCall dd5044ac55 Implement support for converting to string at "natural precision", and fix some
major bugs in long-precision conversion.

llvm-svn: 92150
2009-12-24 23:18:09 +00:00
John McCall e6212ace38 Substantially optimize APFloat::toString() by doing a single large divide to
cut the significand down to the desired precision *before* entering the
core divmod loop.  Makes the overall algorithm logarithmic in the exponent.

There's still a lot of room for improvement here, but this gets the
performance back down to acceptable-for-diagnostics levels, even for
long doubles.
negligible, even on long doubles.

llvm-svn: 92130
2009-12-24 12:16:56 +00:00
John McCall 29b5c284ae 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.

llvm-svn: 92126
2009-12-24 08:56:26 +00:00
Evan Cheng deab9dee12 Remove getIEEEFloatParts and getIEEEDoubleParts. They are not needed.
llvm-svn: 85358
2009-10-28 01:08:17 +00:00
Evan Cheng 67c902147e Add new APFloat methods that return sign, exp, and mantissa of ieee float and double values.
llvm-svn: 85318
2009-10-27 21:35:42 +00:00
Dale Johannesen 0d670b5b92 Commit fixes for half precision I noted in review, so
they don't get lost; I don't think the originator has
write access.

llvm-svn: 84928
2009-10-23 04:02:51 +00:00
Chris Lattner 4794b2b27b Add half precision floating point support (float16) to APFloat,
patch by Peter Johnson! (PR5195)

llvm-svn: 84239
2009-10-16 02:13:51 +00:00
Chris Lattner 688f991b38 wrap long lines.
llvm-svn: 82715
2009-09-24 21:44:20 +00:00
Chris Lattner ac6271e3f4 add a version of the APFloat constructor that initializes to 0.0
llvm-svn: 82110
2009-09-17 01:08:43 +00:00
Anton Korobeynikov 876955cbb0 Fix typo.
llvm-svn: 79688
2009-08-21 23:09:47 +00:00
Anton Korobeynikov 13e8c7ef20 Implement APInt <-> APFloat conversion for IEEE 128-bit floats.
This fixes PR2555

llvm-svn: 79677
2009-08-21 22:10:30 +00:00
Erick Tryzelaar da666c801c Add support for including '+' in APFloat strings, more asserts,
and many new unit tests.

llvm-svn: 79574
2009-08-20 23:30:43 +00:00
Daniel Dunbar bf5998edfb Fix two APFloat bugs in converting hexadecimal constants.
llvm-svn: 79540
2009-08-20 17:12:33 +00:00
Erick Tryzelaar a9680df669 Fix an uninitialized value warning in APFloat.
llvm-svn: 79353
2009-08-18 18:20:37 +00:00
Erick Tryzelaar 19f63b2e4d 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.

llvm-svn: 79210
2009-08-16 23:36:19 +00:00
Torok Edwin fbcc663cbf llvm_unreachable->llvm_unreachable(0), LLVM_UNREACHABLE->llvm_unreachable.
This adds location info for all llvm_unreachable calls (which is a macro now) in
!NDEBUG builds.
In NDEBUG builds location info and the message is off (it only prints
"UREACHABLE executed").

llvm-svn: 75640
2009-07-14 16:55:14 +00:00
Torok Edwin 56d0659726 assert(0) -> LLVM_UNREACHABLE.
Make llvm_unreachable take an optional string, thus moving the cerr<< out of
line.
LLVM_UNREACHABLE is now a simple wrapper that makes the message go away for
NDEBUG builds.

llvm-svn: 75379
2009-07-11 20:10:48 +00:00
Mike Stump 799bf5855e Add support for letting the client choose different flavors of NaNs. Testcase to be
added in clang.

llvm-svn: 72606
2009-05-30 03:49:43 +00:00
Mike Stump 889285d467 Fix whitespacing (space after switch).
llvm-svn: 71738
2009-05-13 23:23:20 +00:00
Dale Johannesen 93eefa0043 Fix internal representation of fp80 to be the
same as a normal i80 {low64, high16} rather
than its own {high64, low16}.  A depressing number
of places know about this; I think I got them all.
Bitcode readers and writers convert back to the old
form to avoid breaking compatibility.

llvm-svn: 67562
2009-03-23 21:16:53 +00:00
Chris Lattner b858c0eba0 just initialize the first element, we don't need to set the rest to zeros.
llvm-svn: 66850
2009-03-13 00:24:01 +00:00
Chris Lattner 0bf186906b Eliminate a 9640 byte static mutable initialized data item by moving it
to the stack.  This shrinks all llvm tools by 9k, and improves reentrancy.

llvm-svn: 66847
2009-03-13 00:03:51 +00:00
Chris Lattner 9170209603 static functions don't need an anonymous namespace.
llvm-svn: 66845
2009-03-12 23:59:55 +00:00
Cedric Venet d1e179d992 Unbreak the build on win32.
Cleanup some warning.

Remark: when struct/class are declared differently than they are defined, this make problem for VC++ since it seems to mangle class differently that struct. These error are very hard to understand and find. So please, try to keep your definition/declaration in sync.

Only tested with VS2008. hope it does not break anything. feel free to revert.

llvm-svn: 64554
2009-02-14 16:06:42 +00:00
Dale Johannesen 1f86498f93 Do not use host floating point types when emitting
ASCII IR; loading and storing these can change the
bits of NaNs on some hosts.  Remove or add warnings
at a few other places using host floating point;
this is a bad thing to do in general.

llvm-svn: 62712
2009-01-21 20:32:55 +00:00
Dale Johannesen b5721632ee 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.

llvm-svn: 62645
2009-01-21 00:35:19 +00:00
Dale Johannesen fe750179ff 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.

llvm-svn: 62593
2009-01-20 18:35:05 +00:00
Dale Johannesen 740e98704d compile-time fmod was done incorrectly. PR 3316.
llvm-svn: 62528
2009-01-19 21:17:05 +00:00
Bill Wendling c6075401c2 Get rid of bogus "control may reach end of non-void function ‘...’ being
inlined" message.

llvm-svn: 60165
2008-11-27 08:00:12 +00:00
Evan Cheng 496b042e20 Revert r60042. IndVarSimplify should check if APFloat is PPCDoubleDouble first before trying to convert it to an integer.
llvm-svn: 60072
2008-11-26 01:11:57 +00:00
Evan Cheng 2e5aeff676 convertToSignExtendedInteger should return opInvalidOp instead of asserting if sematics of float does not allow arithmetics.
llvm-svn: 60042
2008-11-25 19:00:29 +00:00
Dale Johannesen 4f0bd68cfe Add a "loses information" return value to APFloat::convert
and APFloat::convertToInteger.  Restore return value to
IEEE754.  Adjust all users accordingly.

llvm-svn: 57329
2008-10-09 23:00:39 +00:00
Dale Johannesen 54306fe499 Rename APFloat::convertToAPInt to bitcastToAPInt to
make it clearer what the function does.  No functional
change.

llvm-svn: 57325
2008-10-09 18:53:47 +00:00
Dale Johannesen 7221af384d Mark negative-zero-to-int conversion as Inexact,
since -0.0 can't be represented as an int.
This prevents llvm from reducing -0.0 to a
load-and-convert of int 0.  Fixes
ieee.exp/mzero[2356].c in gcc testsuite.

llvm-svn: 57224
2008-10-07 00:40:01 +00:00
Dale Johannesen 6c6729f3a8 Be more precise about which conversions of NaNs
are Inexact.  (These are not Inexact as defined
by IEEE754, but that seems like a reasonable way
to abstract what happens:  information is lost.)

llvm-svn: 57218
2008-10-06 22:59:10 +00:00
Dale Johannesen 6271b0a83c Temporarily revert functionality change from my previous patch;
it is too aggressive.

llvm-svn: 57203
2008-10-06 20:43:48 +00:00
Dale Johannesen fff2995532 Mark shortening NaN conversions as Inexact. PR 2856.
Improve description of unsupported formats.

llvm-svn: 57185
2008-10-06 18:22:29 +00:00
Chris Lattner 17f7165f84 Rework the routines that convert AP[S]Int into a string. Now, instead of
returning an std::string by value, it fills in a SmallString/SmallVector
passed in.  This significantly reduces string thrashing in some cases.

More specifically, this:
 - Adds an operator<< and a print method for APInt that allows you to 
   directly send them to an ostream.
 - Reimplements APInt::toString to be much simpler and more efficient
   algorithmically in addition to not thrashing strings quite as much.

This speeds up llvm-dis on kc++ by 7%, and may also slightly speed up the
asmprinter.  This also fixes a bug I introduced into the asmwriter in a
previous patch w.r.t. alias printing.

llvm-svn: 54873
2008-08-17 07:19:36 +00:00
Chris Lattner 8fcea67ae9 remove a dead APInt ctor.
llvm-svn: 54869
2008-08-17 04:58:58 +00:00