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Szabolcs Nagy fb929067db New exp and exp2 implementations 
The new implementations are provided under !__OBSOLETE_MATH, they use
ISO C99 code.  There are several settings, with the default one the
worst case error in nearest rounding mode is 0.509 ULP for exp and
0.507 ULP for exp2 when a multiply and add is contracted into an fma.
They use a shared 2 KB lookup table, on aarch64 .text+.rodata size
of libm.a is increased by 1868 bytes.  The w_*.c wrappers are disabled
for the new code as it takes care of error handling inline.

The old exp2(x) code used to be just pow(2,x) so the speedup there
is more significant.

The file name has no special prefix to avoid any name collision with
existing files.

Improvements on Cortex-A72:
exp latency: 3.2x
exp thruput: 4.1x
exp2 latency: 7.8x
exp2 thruput: 18.8x
 		2018-06-27 15:40:49 +02:00
..
Makefile.am New expf, exp2f, logf, log2f and powf implementations 2017-10-13 10:58:00 +02:00
Makefile.in makedoc: make errors visible 2017-12-07 11:54:11 +00:00
e_acos.c import newlib-2000-02-17 snapshot 2000-02-17 19:39:52 +00:00
e_acosh.c import newlib-2000-02-17 snapshot 2000-02-17 19:39:52 +00:00
e_asin.c 2000-05-26 Marek Michalkiewicz <marekm@linux.org.pl> 2000-05-26 22:42:39 +00:00
e_atan2.c Throughout, run newlib with -Wall -Werror option and fix bugs and 2012-08-08 11:04:18 +00:00
e_atanh.c import newlib-2000-02-17 snapshot 2000-02-17 19:39:52 +00:00
e_cosh.c 2000-08-23 Werner Almesberger <Werner.Almesberger@epfl.ch> 2000-08-28 17:45:56 +00:00
e_exp.c New exp and exp2 implementations 2018-06-27 15:40:49 +02:00
e_fmod.c import newlib-2000-02-17 snapshot 2000-02-17 19:39:52 +00:00
e_hypot.c import newlib-2000-02-17 snapshot 2000-02-17 19:39:52 +00:00
e_j0.c 2000-05-26 Marek Michalkiewicz <marekm@linux.org.pl> 2000-05-26 22:42:39 +00:00
e_j1.c 2000-05-26 Marek Michalkiewicz <marekm@linux.org.pl> 2000-05-26 22:42:39 +00:00
e_jn.c import newlib-2000-02-17 snapshot 2000-02-17 19:39:52 +00:00
e_log.c 2000-05-26 Marek Michalkiewicz <marekm@linux.org.pl> 2000-05-26 22:42:39 +00:00
e_log10.c import newlib-2000-02-17 snapshot 2000-02-17 19:39:52 +00:00
e_pow.c Throughout, run newlib with -Wall -Werror option and fix bugs and 2012-08-08 11:04:18 +00:00
e_rem_pio2.c Throughout, run newlib with -Wall -Werror option and fix bugs and 2012-08-08 11:04:18 +00:00
e_remainder.c import newlib-2000-02-17 snapshot 2000-02-17 19:39:52 +00:00
e_scalb.c import newlib-2000-02-17 snapshot 2000-02-17 19:39:52 +00:00
e_sinh.c 2000-08-23 Werner Almesberger <Werner.Almesberger@epfl.ch> 2000-08-28 17:45:56 +00:00
e_sqrt.c Avoid unneeded truncation to "int" 2015-05-27 13:30:20 +02:00
ef_acos.c import newlib-2000-02-17 snapshot 2000-02-17 19:39:52 +00:00
ef_acosh.c * libc/include/machine/ieeefp.h: Comment about new configuration 2001-04-04 13:33:01 +00:00
ef_asin.c 2001-04-17 Stephen L. Moshier <moshier@moshier.ne.mediaone.net> 2001-04-17 17:13:00 +00:00
ef_atan2.c 2005-07-20 Bob Wilson <bob.wilson@acm.org> 2005-07-20 16:20:24 +00:00
ef_atanh.c import newlib-2000-02-17 snapshot 2000-02-17 19:39:52 +00:00
ef_cosh.c * libc/include/machine/ieeefp.h: Comment about new configuration 2001-04-04 13:33:01 +00:00
ef_exp.c New expf, exp2f, logf, log2f and powf implementations 2017-10-13 10:58:00 +02:00
ef_fmod.c * libc/include/machine/ieeefp.h: Comment about new configuration 2001-04-04 13:33:01 +00:00
ef_hypot.c 2005-08-02 Bob Wilson <bob.wilson@acm.org> 2005-08-02 19:44:44 +00:00
ef_j0.c * libc/include/machine/ieeefp.h: Comment about new configuration 2001-04-04 13:33:01 +00:00
ef_j1.c * libc/include/machine/ieeefp.h: Comment about new configuration 2001-04-04 13:33:01 +00:00
ef_jn.c * libc/include/machine/ieeefp.h: Comment about new configuration 2001-04-04 13:33:01 +00:00
ef_log.c New expf, exp2f, logf, log2f and powf implementations 2017-10-13 10:58:00 +02:00
ef_log10.c * libc/include/machine/ieeefp.h: Comment about new configuration 2001-04-04 13:33:01 +00:00
ef_pow.c New expf, exp2f, logf, log2f and powf implementations 2017-10-13 10:58:00 +02:00
ef_rem_pio2.c * libc/include/machine/ieeefp.h: Comment about new configuration 2001-04-04 13:33:01 +00:00
ef_remainder.c * libc/include/machine/ieeefp.h: Comment about new configuration 2001-04-04 13:33:01 +00:00
ef_scalb.c 2009-07-09 Craig Howland <howland@LGSInnovations.com> 2009-07-09 17:04:56 +00:00
ef_sinh.c * libc/include/machine/ieeefp.h: Comment about new configuration 2001-04-04 13:33:01 +00:00
ef_sqrt.c * libm/math/ef_sqrt.c: Delete unused variable sign. 2010-03-05 08:55:16 +00:00
el_hypot.c * libc/include/complex.h (cabsl): Add prototype. 2015-02-06 16:14:04 +00:00
er_gamma.c * libm/common/s_fdim.c: New file. 2002-06-07 21:59:57 +00:00
er_lgamma.c Throughout, run newlib with -Wall -Werror option and fix bugs and 2012-08-08 11:04:18 +00:00
erf_gamma.c * libm/common/s_fdim.c: New file. 2002-06-07 21:59:57 +00:00
erf_lgamma.c Throughout, run newlib with -Wall -Werror option and fix bugs and 2012-08-08 11:04:18 +00:00
k_cos.c import newlib-2000-02-17 snapshot 2000-02-17 19:39:52 +00:00
k_rem_pio2.c import newlib-2000-02-17 snapshot 2000-02-17 19:39:52 +00:00
k_sin.c import newlib-2000-02-17 snapshot 2000-02-17 19:39:52 +00:00
k_standard.c import newlib-2000-02-17 snapshot 2000-02-17 19:39:52 +00:00
k_tan.c import newlib-2000-02-17 snapshot 2000-02-17 19:39:52 +00:00
kf_cos.c import newlib-2000-02-17 snapshot 2000-02-17 19:39:52 +00:00
kf_rem_pio2.c import newlib-2000-02-17 snapshot 2000-02-17 19:39:52 +00:00
kf_sin.c import newlib-2000-02-17 snapshot 2000-02-17 19:39:52 +00:00
kf_tan.c import newlib-2000-02-17 snapshot 2000-02-17 19:39:52 +00:00
math.tex Use makedoc output files which are generated but aren't included 2015-06-24 12:23:55 +01:00
s_asinh.c math: remove TRAD_SYNOPSIS 2017-12-01 03:41:53 -06:00
s_atan.c math: remove TRAD_SYNOPSIS 2017-12-01 03:41:53 -06:00
s_ceil.c import newlib-2000-02-17 snapshot 2000-02-17 19:39:52 +00:00
s_cos.c import newlib-2000-02-17 snapshot 2000-02-17 19:39:52 +00:00
s_erf.c math: remove TRAD_SYNOPSIS 2017-12-01 03:41:53 -06:00
s_fabs.c math: remove TRAD_SYNOPSIS 2017-12-01 03:41:53 -06:00
s_floor.c math: remove TRAD_SYNOPSIS 2017-12-01 03:41:53 -06:00
s_frexp.c math: remove TRAD_SYNOPSIS 2017-12-01 03:41:53 -06:00
s_ldexp.c math: remove TRAD_SYNOPSIS 2017-12-01 03:41:53 -06:00
s_signif.c import newlib-2000-02-17 snapshot 2000-02-17 19:39:52 +00:00
s_sin.c math: remove TRAD_SYNOPSIS 2017-12-01 03:41:53 -06:00
s_tan.c math: remove TRAD_SYNOPSIS 2017-12-01 03:41:53 -06:00
s_tanh.c math: remove TRAD_SYNOPSIS 2017-12-01 03:41:53 -06:00
sf_asinh.c * libc/include/machine/ieeefp.h: Comment about new configuration 2001-04-04 13:33:01 +00:00
sf_atan.c * libc/include/machine/ieeefp.h: Comment about new configuration 2001-04-04 13:33:01 +00:00
sf_ceil.c * libc/include/machine/ieeefp.h: Comment about new configuration 2001-04-04 13:33:01 +00:00
sf_cos.c Improve performance of sinf/cosf/sincosf 2018-06-21 09:37:04 +02:00
sf_erf.c * libc/include/machine/ieeefp.h: Comment about new configuration 2001-04-04 13:33:01 +00:00
sf_fabs.c import newlib-2000-02-17 snapshot 2000-02-17 19:39:52 +00:00
sf_floor.c * libc/include/machine/ieeefp.h: Comment about new configuration 2001-04-04 13:33:01 +00:00
sf_frexp.c * libc/include/machine/ieeefp.h: Comment about new configuration 2001-04-04 13:33:01 +00:00
sf_ldexp.c import newlib-2000-02-17 snapshot 2000-02-17 19:39:52 +00:00
sf_signif.c import newlib-2000-02-17 snapshot 2000-02-17 19:39:52 +00:00
sf_sin.c Improve performance of sinf/cosf/sincosf 2018-06-21 09:37:04 +02:00
sf_tan.c * libc/include/machine/ieeefp.h: Comment about new configuration 2001-04-04 13:33:01 +00:00
sf_tanh.c * libc/include/machine/ieeefp.h: Comment about new configuration 2001-04-04 13:33:01 +00:00
w_acos.c math: remove TRAD_SYNOPSIS 2017-12-01 03:41:53 -06:00
w_acosh.c math: remove TRAD_SYNOPSIS 2017-12-01 03:41:53 -06:00
w_asin.c math: remove TRAD_SYNOPSIS 2017-12-01 03:41:53 -06:00
w_atan2.c math: remove TRAD_SYNOPSIS 2017-12-01 03:41:53 -06:00
w_atanh.c math: remove TRAD_SYNOPSIS 2017-12-01 03:41:53 -06:00
w_cosh.c math: remove TRAD_SYNOPSIS 2017-12-01 03:41:53 -06:00
w_drem.c import newlib-2000-02-17 snapshot 2000-02-17 19:39:52 +00:00
w_exp.c New exp and exp2 implementations 2018-06-27 15:40:49 +02:00
w_exp2.c New exp and exp2 implementations 2018-06-27 15:40:49 +02:00
w_fmod.c math: remove TRAD_SYNOPSIS 2017-12-01 03:41:53 -06:00
w_gamma.c math: remove TRAD_SYNOPSIS 2017-12-01 03:41:53 -06:00
w_hypot.c math: remove TRAD_SYNOPSIS 2017-12-01 03:41:53 -06:00
w_j0.c math: remove TRAD_SYNOPSIS 2017-12-01 03:41:53 -06:00
w_j1.c import newlib-2000-02-17 snapshot 2000-02-17 19:39:52 +00:00
w_jn.c import newlib-2000-02-17 snapshot 2000-02-17 19:39:52 +00:00
w_lgamma.c * implement a new `struct _reent' that is significantly smaller. use this 2002-02-03 09:24:18 +00:00
w_log.c math: remove TRAD_SYNOPSIS 2017-12-01 03:41:53 -06:00
w_log10.c math: remove TRAD_SYNOPSIS 2017-12-01 03:41:53 -06:00
w_pow.c math: remove TRAD_SYNOPSIS 2017-12-01 03:41:53 -06:00
w_remainder.c math: remove TRAD_SYNOPSIS 2017-12-01 03:41:53 -06:00
w_scalb.c import newlib-2000-02-17 snapshot 2000-02-17 19:39:52 +00:00
w_sincos.c * libc/sys/linux/cmath: New directory. 2002-08-16 21:29:45 +00:00
w_sinh.c math: remove TRAD_SYNOPSIS 2017-12-01 03:41:53 -06:00
w_sqrt.c math: remove TRAD_SYNOPSIS 2017-12-01 03:41:53 -06:00
w_tgamma.c 2011-01-12 Ralf Corsépius <ralf.corsepius@rtems.org> 2011-01-12 22:25:15 +00:00
wf_acos.c ansification: remove _HAVE_STDC 2018-01-17 11:47:30 -06:00
wf_acosh.c 2009-07-09 Craig Howland <howland@LGSInnovations.com> 2009-07-09 17:04:56 +00:00
wf_asin.c 2009-07-09 Craig Howland <howland@LGSInnovations.com> 2009-07-09 17:04:56 +00:00
wf_atan2.c 2007-05-17 Cary R. <cygcary <at> yahoo.com> 2007-05-17 21:52:11 +00:00
wf_atanh.c 2009-07-09 Craig Howland <howland@LGSInnovations.com> 2009-07-09 17:04:56 +00:00
wf_cosh.c 2009-07-09 Craig Howland <howland@LGSInnovations.com> 2009-07-09 17:04:56 +00:00
wf_drem.c import newlib-2000-02-17 snapshot 2000-02-17 19:39:52 +00:00
wf_exp.c New expf, exp2f, logf, log2f and powf implementations 2017-10-13 10:58:00 +02:00
wf_exp2.c New expf, exp2f, logf, log2f and powf implementations 2017-10-13 10:58:00 +02:00
wf_fmod.c 2009-07-09 Craig Howland <howland@LGSInnovations.com> 2009-07-09 17:04:56 +00:00
wf_gamma.c * implement a new `struct _reent' that is significantly smaller. use this 2002-02-03 09:24:18 +00:00
wf_hypot.c import newlib-2000-02-17 snapshot 2000-02-17 19:39:52 +00:00
wf_j0.c 2009-07-09 Craig Howland <howland@LGSInnovations.com> 2009-07-09 17:04:56 +00:00
wf_j1.c 2009-07-09 Craig Howland <howland@LGSInnovations.com> 2009-07-09 17:04:56 +00:00
wf_jn.c 2009-07-09 Craig Howland <howland@LGSInnovations.com> 2009-07-09 17:04:56 +00:00
wf_lgamma.c * implement a new `struct _reent' that is significantly smaller. use this 2002-02-03 09:24:18 +00:00
wf_log.c New expf, exp2f, logf, log2f and powf implementations 2017-10-13 10:58:00 +02:00
wf_log2.c New expf, exp2f, logf, log2f and powf implementations 2017-10-13 10:58:00 +02:00
wf_log10.c 2009-07-09 Craig Howland <howland@LGSInnovations.com> 2009-07-09 17:04:56 +00:00
wf_pow.c newlib: Don't do double divide in powf. 2017-12-13 11:33:19 +01:00
wf_remainder.c 2009-07-09 Craig Howland <howland@LGSInnovations.com> 2009-07-09 17:04:56 +00:00
wf_scalb.c 2009-07-09 Craig Howland <howland@LGSInnovations.com> 2009-07-09 17:04:56 +00:00
wf_sincos.c Improve performance of sinf/cosf/sincosf 2018-06-21 09:37:04 +02:00
wf_sinh.c import newlib-2000-02-17 snapshot 2000-02-17 19:39:52 +00:00
wf_sqrt.c 2009-07-09 Craig Howland <howland@LGSInnovations.com> 2009-07-09 17:04:56 +00:00
wf_tgamma.c 2011-01-12 Ralf Corsépius <ralf.corsepius@rtems.org> 2011-01-12 22:25:15 +00:00
wr_gamma.c import newlib-2000-02-17 snapshot 2000-02-17 19:39:52 +00:00
wr_lgamma.c import newlib-2000-02-17 snapshot 2000-02-17 19:39:52 +00:00
wrf_gamma.c import newlib-2000-02-17 snapshot 2000-02-17 19:39:52 +00:00
wrf_lgamma.c import newlib-2000-02-17 snapshot 2000-02-17 19:39:52 +00:00