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2012-03-19Merge remote branch 'nsz/master'Rich Felker7-80/+3
2012-03-19bug fix: wrong opcode for writing long longRich Felker2-2/+2
2012-03-19remove long double const workaroundsnsz6-79/+2
Some long double consts were stored in two doubles as a workaround for x86_64 and i386 with the following comment: /* Long double constants are slow on these arches, and broken on i386. */ This is most likely old gcc bug related to the default x87 fpu precision setting (it's double instead of double extended on BSD).
2012-03-19fix erfl wrapper for long double==double casensz1-1/+1
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 Felker19-49/+49
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 Felker6-14/+23
standard functions cannot depend on nonstandard symbols
2012-03-16Merge remote branch 'nsz/master'Rich Felker66-216/+413
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
2012-03-15in math.h make lgamma_r and non-double bessel _GNU_SOURCE onlynsz3-0/+3
long double and float bessel functions are no longer xsi extensions
2012-03-15efficient sincos based on sin and cosnsz3-0/+247
2012-03-15avoid changing NaNs in sqrt (x86 asm) to satisfy c99 f.9 recommendationRich Felker1-0/+4
2012-03-15correctly rounded sqrt() asm for x86 (i387)Rich Felker1-0/+16
the fsqrt opcode is correctly rounded, but only in the fpu's selected precision mode, which is 80-bit extended precision. to get a correctly rounded double precision output, we check for the only corner cases where two-step rounding could give different results than one-step (extended-precision mantissa ending in 0x400) and adjust the mantissa slightly in the opposite direction of the rounding which the fpu already did (reported in the c1 flag of the fpu status word). this should have near-zero cost in the non-corner cases and at worst very low cost. note that in order for sqrt() to get used when compiling with gcc, the broken, non-conformant builtin sqrt must be disabled.
2012-03-13correct rounding for i387 sqrtf functionRich Felker1-0/+2
2012-03-13math cleanup: use 1.0f instead of 1.0Fnsz4-6/+6
2012-03-13math cleanup: use 1.0f instead of (float)1.0nsz25-96/+96
2012-03-13remove libm.h includes when math.h and float.h are enoughnsz31-30/+47
2012-03-13clean up __expo2.c, use a slightly better k constantnsz2-84/+14
2012-03-13implement nan, nanf, nanlRich Felker3-0/+18
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