| Commit message (Expand) | Author | Age | Files | Lines |
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| * | asm for log1p | Rich Felker | 2012-03-19 | 3 | -0/+45 |
| * | asm for log2 | Rich Felker | 2012-03-19 | 3 | -0/+21 |
| * | asm for remquo•••this could perhaps use some additional testing for corner cases, but
it seems to be correct.
| Rich Felker | 2012-03-19 | 3 | -0/+43 |
| * | optimize exponential asm for i386•••up to 30% faster exp2 by avoiding slow frndint and fscale functions.
expm1 also takes a much more direct path for small arguments (the
expected usage case).
| Rich Felker | 2012-03-19 | 2 | -58/+77 |
| * | Merge remote branch 'nsz/master' | Rich Felker | 2012-03-19 | 5 | -163/+208 |
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| | * | simplify scalbn*.c implementations•••The old scalbn.c was wrong and slow, the new one is just slow.
(scalbn(0x1p+1023,-2097) should give 0x1p-1074, but the old code gave 0)
| nsz | 2012-03-19 | 3 | -152/+65 |
| | * | Merge branch 'master' of git://git.etalabs.net/musl | nsz | 2012-03-19 | 9 | -0/+75 |
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| | * \ | Merge branch 'master' of git://git.etalabs.net/musl | nsz | 2012-03-19 | 21 | -0/+157 |
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| | * \ \ | Merge branch 'master' of git://git.etalabs.net/musl | nsz | 2012-03-19 | 14 | -1/+109 |
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| | * \ \ \ | Merge branch 'master' of git://git.etalabs.net/musl | nsz | 2012-03-19 | 9 | -0/+89 |
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| | * | | | | | remove unnecessary TODO comments from fma.c | nsz | 2012-03-19 | 1 | -5/+1 |
| | * | | | | | fmal bug fix: nan input should not raise exception | nsz | 2012-03-19 | 1 | -4/+4 |
| | * | | | | | add fma implementation for x86•••correctly rounded double precision fma using extended
precision arithmetics for ld80 systems (x87)
| nsz | 2012-03-19 | 1 | -7/+143 |
| * | | | | | | fix broken modf family functions | Rich Felker | 2012-03-19 | 3 | -27/+66 |
| * | | | | | | asm for modf functions | Rich Felker | 2012-03-19 | 3 | -0/+45 |
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| * | | | | | asm for floor/ceil/trunc | Rich Felker | 2012-03-19 | 9 | -0/+75 |
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| * | | | | asm for scalbn family•••unlike some implementations, these functions perform the equivalent of
gcc's -ffloat-store on the result before returning. this is necessary
to raise underflow/overflow/inexact exceptions, perform the correct
rounding with denormals, etc.
| Rich Felker | 2012-03-19 | 9 | -0/+64 |
| * | | | | asm for inverse trig functions•••unlike trig functions, these are easy to do in asm because they do not
involve (arbitrary-precision) argument reduction. fpatan automatically
takes care of domain issues, and in asin and acos, fsqrt takes care of
them for us.
| Rich Felker | 2012-03-19 | 12 | -0/+93 |
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| * | | | asm for log functions | Rich Felker | 2012-03-18 | 6 | -0/+42 |
| * | | | fix broken exponential asm•••infinities were getting converted into nans. the new code simply tests
for infinity and replaces it with a large magnitude value of the same
sign.
also, the fcomi instruction is apparently not part of the i387
instruction set, so avoid using it.
| Rich Felker | 2012-03-18 | 2 | -1/+21 |
| * | | | asm for lrint family on i386 | Rich Felker | 2012-03-18 | 6 | -0/+46 |
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| * | | asm exponential functions for i386 | Rich Felker | 2012-03-18 | 9 | -0/+89 |
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| * | assembly optimizations for fmod/remainder functions | Rich Felker | 2012-03-18 | 8 | -0/+88 |
| * | asm versions of some simple math functions for i386 and x86_64•••these are functions that have direct fpu approaches to implementation
without problematic exception or rounding issues. x86_64 lacks
float/double versions because i'm unfamiliar with the necessary sse
code for performing these operations.
| Rich Felker | 2012-03-18 | 8 | -0/+48 |
| * | simplify lround and llround functions•••Simple wrappers around round is enough because
spurious inexact exception is allowed.
| nsz | 2012-03-18 | 6 | -112/+20 |
| * | make lrint and llrint functions work without fenv support | nsz | 2012-03-18 | 6 | -6/+16 |
| * | faster lrint and llrint functions•••A faster workaround for spurious inexact exceptions
when the result cannot be represented. The old code
actually could be wrong, because gcc reordered the
integer conversion and the exception check.
| nsz | 2012-03-18 | 6 | -80/+99 |
| * | fix loads of missing const in new libm, and some global vars (?!) in powl | Rich Felker | 2012-03-18 | 20 | -51/+51 |
| * | move nonstandard gamma() etc. to _GNU_SOURCE only•••it's not even provided in the library at the moment, but could easily
be provided with weak aliases if desired.
| Rich Felker | 2012-03-17 | 1 | -4/+4 |
| * | c++ seems to want some casts in the float representation-access macros | Rich Felker | 2012-03-17 | 1 | -2/+2 |
| * | release notes for 0.8.7 | Rich Felker | 2012-03-17 | 1 | -0/+24 |
| * | try fixing/optimizing x86_64 fenv exception code•••untested; may need followup-fixes.
| Rich Felker | 2012-03-17 | 1 | -18/+23 |
| * | optimize x86 feclearexcept•••if all exception flags will be cleared, we can avoid the expensive
store/reload of the environment and just use the fnclex instruction.
| Rich Felker | 2012-03-17 | 1 | -16/+20 |
| * | fix x86_64 fe[gs]etround, analogous to nsz's x86 changes | Rich Felker | 2012-03-17 | 1 | -8/+9 |
| * | minor 387 fenv optimizations | Rich Felker | 2012-03-17 | 1 | -6/+5 |
| * | Merge remote branch 'nsz/master' | Rich Felker | 2012-03-17 | 1 | -10/+10 |
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| | * | fix i386 fegetround and make fesetround faster•••Note that the new fesetround has slightly different semantics:
Storing the floating-point environment with fnstenv makes the
next fldenv (or fldcw) "non-signaling", so unmasked and pending
exceptions does not invoke the exception handler.
(These are rare since exceptions are handled immediately and by
default all exceptions are masked anyway. But if one manually
unmasks an exception in the control word then either sets the
corresponding exception flag in the status word or the execution
of an exception raising floating-point operation gets interrupted
then it may happen).
So the old implementation did not trap in some rare cases
where the new implementation traps.
However POSIX does not specify anything like the x87 exception
handling traps and the fnstenv/fldenv pair is significantly slower
than the fnstcw/fldcw pair (new code is about 5x faster here and
it's dominated by the function call overhead).
| nsz | 2012-03-17 | 1 | -10/+10 |
| * | | don't fail on inability to install dynamic linker (e.g. if not root) | Rich Felker | 2012-03-17 | 1 | -1/+1 |
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| * | one more fenv availability issue: lround | Rich Felker | 2012-03-17 | 1 | -0/+2 |
| * | make fma and lrint functions build without full fenv support•••this is necessary to support archs where fenv is incomplete or
unavailable (presently arm). fma, fmal, and the lrint family should
work perfectly fine with this change; fmaf is slightly broken with
respect to rounding as it depends on non-default rounding modes to do
its work.
| Rich Felker | 2012-03-16 | 4 | -4/+28 |
| * | other side of the signgam namespace fix: use the internal name | Rich Felker | 2012-03-16 | 3 | -3/+7 |
| * | make signgam a weak alias for an internal symbol•••otherwise, the standard C lgamma function will clobber a symbol in the
namespace reserved for the application.
| Rich Felker | 2012-03-16 | 1 | -2/+5 |
| * | fix namespace issues for lgamma, etc.•••standard functions cannot depend on nonstandard symbols
| Rich Felker | 2012-03-16 | 7 | -14/+25 |
| * | Merge remote branch 'nsz/master' | Rich Felker | 2012-03-16 | 68 | -237/+440 |
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| | * | in math.h make lgamma_r and non-double bessel _GNU_SOURCE only•••long double and float bessel functions are no longer xsi extensions
| nsz | 2012-03-15 | 4 | -20/+21 |
| | * | efficient sincos based on sin and cos | nsz | 2012-03-15 | 5 | -8/+251 |
| | * | math cleanup: use 1.0f instead of 1.0F | nsz | 2012-03-13 | 4 | -6/+6 |
| | * | math cleanup: use 1.0f instead of (float)1.0 | nsz | 2012-03-13 | 25 | -96/+96 |
| | * | remove libm.h includes when math.h and float.h are enough | nsz | 2012-03-13 | 31 | -30/+47 |
| | * | clean up __expo2.c, use a slightly better k constant | nsz | 2012-03-13 | 2 | -84/+14 |
