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glibc/sysdeps/powerpc
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Paul Zimmermann 9acda61d94 Fix the inaccuracy of j0f/j1f/y0f/y1f [BZ #14469, #14470, #14471, #14472] 
For j0f/j1f/y0f/y1f, the largest error for all binary32
inputs is reduced to at most 9 ulps for all rounding modes.

The new code is enabled only when there is a cancellation at the very end of
the j0f/j1f/y0f/y1f computation, or for very large inputs, thus should not
give any visible slowdown on average.  Two different algorithms are used:

* around the first 64 zeros of j0/j1/y0/y1, approximation polynomials of
  degree 3 are used, computed using the Sollya tool (https://www.sollya.org/)

* for large inputs, an asymptotic formula from [1] is used

[1] Fast and Accurate Bessel Function Computation,
    John Harrison, Proceedings of Arith 19, 2009.

Inputs yielding the new largest errors are added to auto-libm-test-in,
and ulps are regenerated for various targets (thanks Adhemerval Zanella).

Tested on x86_64 with --disable-multi-arch and on powerpc64le-linux-gnu.
Reviewed-by: Adhemerval Zanella  <adhemerval.zanella@linaro.org>
2021-04-02 06:15:48 +02:00
..
bits Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
fpu Fix the inaccuracy of j0f/j1f/y0f/y1f [BZ #14469, #14470, #14471, #14472] 2021-04-02 06:15:48 +02:00
nofpu Update powerpc-nofpu libm-test-ulps. 2021-01-18 20:21:07 +00:00
nptl Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
power4 Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
power6 Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
powerpc32 Implement <unwind-link.h> for dynamically loading the libgcc_s unwinder 2021-03-01 15:58:01 +01:00
powerpc64 powerpc64le: Use ifunc for _Float128 functions also in libc 2021-04-01 10:55:42 +02:00
sys/platform Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
abort-instr.h Update. 2002-09-15 18:31:23 +00:00
atomic-machine.h Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
cpu-features.c Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
cpu-features.h Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
dl-procinfo.c Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
dl-procinfo.h Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
dl-tls.c Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
dl-tls.h Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
dl-tunables.list Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
elf-initfini.h Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
ffs.c Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
fpu_control.h Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
gccframe.h Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
hwcapinfo.c Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
hwcapinfo.h Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
ifunc-sel.h Fix powerpc ifunc-sel.h build for -Os. 2018-03-02 22:27:56 +00:00
jmpbuf-offsets.h Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
jmpbuf-unwind.h Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
ldsodefs.h Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
libc-tls.c Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
locale-defines.sym powerpc: strcasestr optmization for power8 2016-04-22 19:23:13 +05:30
longjmp.c Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
machine-gmon.h Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
Makefile powerpc: Move cache line size to rtld_global_ro 2020-01-17 09:05:03 -03:00
math-tests-snan-cast.h Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
memusage.h Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
mod-cache-ppc.c Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
mod-tlsopt-powerpc.c tst-tlsopt-powerpc as a shared lib 2017-08-03 15:39:21 +09:30
mp_clz_tab.c Update. 2002-03-14 20:48:50 +00:00
novmx-longjmp.c Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
novmx-sigjmp.c Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
novmxsetjmp.h Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
preconfigure powerpc: Add support for POWER10 2020-06-29 10:08:38 -03:00
preconfigure.ac powerpc: Add support for POWER10 2020-06-29 10:08:38 -03:00
rtld-global-offsets.sym powerpc: Move cache line size to rtld_global_ro 2020-01-17 09:05:03 -03:00
sched_cpucount.c Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
sigjmp.c Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
sotruss-lib.c Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
stackinfo.h Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
sysdep.h Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
test-arith.c Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
test-arithf.c Update. 1997-08-10 18:37:15 +00:00
test-get_hwcap-static.c Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
test-get_hwcap.c Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
test-gettimebase.c Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
tls-macros.h Split tls-macros.h in sysdeps directories. 2012-07-19 17:04:04 -03:00
tst-cache-ppc-static-dlopen.c Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
tst-cache-ppc-static.c Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
tst-cache-ppc.c Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
tst-set_ppr.c Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
tst-stack-align.h Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
tst-tlsifunc-static.c Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
tst-tlsifunc.c Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
tst-tlsopt-powerpc.c tst-tlsopt-powerpc as a shared lib 2017-08-03 15:39:21 +09:30
Versions Add femode_t functions. 2016-09-07 16:40:09 +00:00