31f0116173
Add back a line I deleted by accident in r145141. Fixes uninitialized variable warnings and runtime failures.
...
llvm-svn: 145256
2011-11-28 18:50:37 +00:00
a84ad7d0d0
Fix APFloat::convert so that it handles narrowing conversions correctly; it
...
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.
llvm-svn: 145141
2011-11-26 03:38:02 +00:00
d433042388
Fix APFloat::getSmallestNormalized so the shift doesn't depend on undefined behavior. Patch from Ahmed Charles.
...
llvm-svn: 141818
2011-10-12 21:56:19 +00:00
c53220134a
Fix APFloat::getLargest so that it actually returns the correct value. Found by accident while reviewing a patch to nearby code.
...
llvm-svn: 141816
2011-10-12 21:51:36 +00:00
195464184e
Fix APInt::operator*= so that it computes the correct result for large integers where there is unsigned overflow. Fix APFloat::toString so that it doesn't depend on the incorrect behavior in common cases (and computes the correct result in some rare cases). Fixes PR11086.
...
llvm-svn: 141441
2011-10-07 23:40:49 +00:00
f66daac2f5
Fix typo in comments.
...
llvm-svn: 141032
2011-10-03 21:30:08 +00:00
a41634e307
Silence a bunch (but not all) "variable written but not read" warnings
...
when building with assertions disabled.
llvm-svn: 137460
2011-08-12 14:54:45 +00:00
7a16288157
Add APInt(numBits, ArrayRef<uint64_t> bigVal) constructor to prevent future ambiguity
...
errors like the one corrected by r135261. Migrate all LLVM callers of the old
constructor to the new one.
llvm-svn: 135431
2011-07-18 21:45:40 +00:00
1bf4a30d4d
Explicitly cast the second argument to unsigned in order to select the
...
desired overload.
This is a bit of a hackish workaround to fix the compile after r135259.
Let me know if there is a better approach.
llvm-svn: 135261
2011-07-15 07:31:10 +00:00
03b81a2eb4
Add an APFloat::convertToInt(APSInt) function that automatically manages the
...
memory for the result.
llvm-svn: 135259
2011-07-15 07:04:56 +00:00
0ab5e2cded
Fix a ton of comment typos found by codespell. Patch by
...
Luis Felipe Strano Moraes!
llvm-svn: 129558
2011-04-15 05:18:47 +00:00
af0ed953c5
Avoid turning a floating point division with a constant power of two into a denormal multiplication.
...
Some platforms may treat denormals as zero, on other platforms multiplication
with a subnormal is slower than dividing by a normal.
llvm-svn: 128555
2011-03-30 17:02:54 +00:00
03fd672609
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.
llvm-svn: 128545
2011-03-30 15:42:27 +00:00
a50db6544f
Initialize the only-used-with-PPC-double-double parts of the APFloat class. This
...
makes valgrind stop complaining about uninitialized variables being read when it
accesses a bitfield (category) that shares its bits with these variables.
llvm-svn: 127871
2011-03-18 09:09:44 +00:00
7cc6d12ad0
Enhance constant folding of bitcast operations on vectors of floats.
...
Add getAllOnesValue of FP numbers to Constants and APFloat.
Add more tests.
llvm-svn: 125776
2011-02-17 21:22:27 +00:00
3c4408ceb6
Null initialize a few variables flagged by
...
clang's -Wuninitialized-experimental warning.
While these don't look like real bugs, clang's
-Wuninitialized-experimental analysis is stricter
than GCC's, and these fixes have the benefit
of being general nice cleanups.
llvm-svn: 124073
2011-01-23 17:05:06 +00:00
a41d7aebee
Fixed parsing of hex floats.
...
llvm-svn: 122963
2011-01-06 16:55:14 +00:00
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
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
370c77c064
Do not assert when reading an exponent out of range.
...
llvm-svn: 111534
2010-08-19 17:58:35 +00:00
92d8998348
Don't pass StringRef by reference.
...
llvm-svn: 108366
2010-07-14 22:38:02 +00:00
b452d4e9e4
Fix minor style issues.
...
llvm-svn: 99414
2010-03-24 19:38:02 +00:00
4c1e4db3ff
make APFloat::toString be const.
...
llvm-svn: 97883
2010-03-06 19:20:13 +00:00
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
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
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
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
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
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
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
deab9dee12
Remove getIEEEFloatParts and getIEEEDoubleParts. They are not needed.
...
llvm-svn: 85358
2009-10-28 01:08:17 +00:00
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
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
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
688f991b38
wrap long lines.
...
llvm-svn: 82715
2009-09-24 21:44:20 +00:00
ac6271e3f4
add a version of the APFloat constructor that initializes to 0.0
...
llvm-svn: 82110
2009-09-17 01:08:43 +00:00
876955cbb0
Fix typo.
...
llvm-svn: 79688
2009-08-21 23:09:47 +00:00
13e8c7ef20
Implement APInt <-> APFloat conversion for IEEE 128-bit floats.
...
This fixes PR2555
llvm-svn: 79677
2009-08-21 22:10:30 +00:00
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
bf5998edfb
Fix two APFloat bugs in converting hexadecimal constants.
...
llvm-svn: 79540
2009-08-20 17:12:33 +00:00
a9680df669
Fix an uninitialized value warning in APFloat.
...
llvm-svn: 79353
2009-08-18 18:20:37 +00:00
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
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
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
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
889285d467
Fix whitespacing (space after switch).
...
llvm-svn: 71738
2009-05-13 23:23:20 +00:00
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
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
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
9170209603
static functions don't need an anonymous namespace.
...
llvm-svn: 66845
2009-03-12 23:59:55 +00:00
Eli Friedman