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107 Commits

Author SHA1 Message Date
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