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2012-03-19bug fix: wrong opcode for writing long longRich Felker2-2/+2
2012-03-19asm for log1pRich Felker3-0/+45
2012-03-19asm for log2Rich Felker3-0/+21
2012-03-19asm for remquoRich Felker3-0/+43
this could perhaps use some additional testing for corner cases, but it seems to be correct.
2012-03-19optimize exponential asm for i386Rich Felker2-58/+77
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).
2012-03-19Merge remote branch 'nsz/master'Rich Felker5-163/+208
2012-03-19fix broken modf family functionsRich Felker3-27/+66
2012-03-19asm for modf functionsRich Felker3-0/+45
2012-03-19simplify scalbn*.c implementationsnsz3-152/+65
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)
2012-03-19Merge branch 'master' of git://git.etalabs.net/muslnsz9-0/+75
2012-03-19asm for floor/ceil/truncRich Felker9-0/+75
2012-03-19Merge branch 'master' of git://git.etalabs.net/muslnsz21-0/+157
2012-03-19asm for scalbn familyRich Felker9-0/+64
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.
2012-03-19asm for inverse trig functionsRich Felker12-0/+93
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.
2012-03-19Merge branch 'master' of git://git.etalabs.net/muslnsz14-1/+109
2012-03-18asm for log functionsRich Felker6-0/+42
2012-03-18fix broken exponential asmRich Felker2-1/+21
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.
2012-03-18asm for lrint family on i386Rich Felker6-0/+46
2012-03-19Merge branch 'master' of git://git.etalabs.net/muslnsz9-0/+89
2012-03-18asm exponential functions for i386Rich Felker9-0/+89
2012-03-19remove unnecessary TODO comments from fma.cnsz1-5/+1
2012-03-19fmal bug fix: nan input should not raise exceptionnsz1-4/+4
2012-03-19add fma implementation for x86nsz1-7/+143
correctly rounded double precision fma using extended precision arithmetics for ld80 systems (x87)
2012-03-18assembly optimizations for fmod/remainder functionsRich Felker8-0/+88
2012-03-18asm versions of some simple math functions for i386 and x86_64Rich Felker8-0/+48
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.
2012-03-18simplify lround and llround functionsnsz6-112/+20
Simple wrappers around round is enough because spurious inexact exception is allowed.
2012-03-18make lrint and llrint functions work without fenv supportnsz6-6/+16
2012-03-18faster lrint and llrint functionsnsz6-80/+99
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.
2012-03-18fix loads of missing const in new libm, and some global vars (?!) in powlRich Felker20-51/+51
2012-03-17move nonstandard gamma() etc. to _GNU_SOURCE onlyRich Felker1-4/+4
it's not even provided in the library at the moment, but could easily be provided with weak aliases if desired.
2012-03-17c++ seems to want some casts in the float representation-access macrosRich Felker1-2/+2
2012-03-17release notes for 0.8.7v0.8.7Rich Felker1-0/+24
2012-03-17try fixing/optimizing x86_64 fenv exception codeRich Felker1-18/+23
untested; may need followup-fixes.
2012-03-17optimize x86 feclearexceptRich Felker1-16/+20
if all exception flags will be cleared, we can avoid the expensive store/reload of the environment and just use the fnclex instruction.
2012-03-17fix x86_64 fe[gs]etround, analogous to nsz's x86 changesRich Felker1-8/+9
2012-03-17minor 387 fenv optimizationsRich Felker1-6/+5
2012-03-17Merge remote branch 'nsz/master'Rich Felker1-10/+10
2012-03-17fix i386 fegetround and make fesetround fasternsz1-10/+10
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).
2012-03-17don't fail on inability to install dynamic linker (e.g. if not root)Rich Felker1-1/+1
2012-03-17one more fenv availability issue: lroundRich Felker1-0/+2
2012-03-16make fma and lrint functions build without full fenv supportRich Felker4-4/+28
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.
2012-03-16other side of the signgam namespace fix: use the internal nameRich Felker3-3/+7
2012-03-16make signgam a weak alias for an internal symbolRich Felker1-2/+5
otherwise, the standard C lgamma function will clobber a symbol in the namespace reserved for the application.
2012-03-16fix namespace issues for lgamma, etc.Rich Felker7-14/+25
standard functions cannot depend on nonstandard symbols
2012-03-16Merge remote branch 'nsz/master'Rich Felker68-237/+440
2012-03-16remove junk sincos implementations in preparation to merge nsz's real onesRich Felker4-27/+0
2012-03-16revert COPYRIGHT file changes in preparation to merge nsz's math branchRich Felker1-4/+5
2012-03-16update copyright status (math library and new year)Rich Felker1-6/+5
2012-03-15remove special nan handling from x86 sqrt asmRich Felker1-3/+0
a double precision nan, when converted to extended (80-bit) precision, will never end in 0x400, since the corresponding bits do not exist in the original double precision value. thus there's no need to waste time and code size on this check.
2012-03-15simplify nan check in sqrt (x86 asm); result of sqrt is never negativeRich Felker1-4/+3
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