https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=218514
--- Comment #21 from commit-hook_at_FreeBSD.org ---
A commit in branch main references this bug:
URL:
https://cgit.FreeBSD.org/src/commit/?id=dce5f3abed7181cc533ca5ed3de44517775e78dd
commit dce5f3abed7181cc533ca5ed3de44517775e78dd
Author: Steve Kargl <kargl_at_FreeBSD.org>
AuthorDate: 2021-10-25 13:13:52 +0000
Commit: Konstantin Belousov <kib_at_FreeBSD.org>
CommitDate: 2021-10-25 23:50:20 +0000
[LIBM] implementations of sinpi[fl], cospi[fl], and tanpi[fl]
Both IEEE-754 2008 and ISO/IEC TS 18661-4 define the half-cycle
trignometric functions cospi, sinpi, and tanpi. The attached
patch implements cospi[fl], sinpi[fl], and tanpi[fl]. Limited
testing on the cospi and sinpi reveal a max ULP less than 0.89;
while tanpi is more problematic with a max ULP less than 2.01
in the interval [0,0.5]. The algorithms used in these functions
are documented in {ks}_cospi.c, {ks}_sinpi.c, and s_tanpi.c.
Note. I no longer have access to a system with ld128 and
adequate support to compile and test the ld128 implementations
of these functions. Given the almost complete lack of input from
others on improvements to libm, I doubt that anyone cares. If
someone does care, the ld128 files contain a number of FIXME comments,
and in particular, while the polynomial coefficients are given
I did not update the polynomial algorithms to properly use the
coefficients.
PR: 218514
MFC after: 2 weeks
lib/msun/Makefile | 14 +++-
lib/msun/Symbol.map | 13 +++
lib/msun/ld128/k_cospil.h (new) | 42 ++++++++++
lib/msun/ld128/k_sinpil.h (new) | 42 ++++++++++
lib/msun/ld128/s_cospil.c (new) | 109 +++++++++++++++++++++++++
lib/msun/ld128/s_sinpil.c (new) | 118 +++++++++++++++++++++++++++
lib/msun/ld128/s_tanpil.c (new) | 120 +++++++++++++++++++++++++++
lib/msun/ld80/k_cospil.h (new) | 42 ++++++++++
lib/msun/ld80/k_sinpil.h (new) | 42 ++++++++++
lib/msun/ld80/s_cospil.c (new) | 129 +++++++++++++++++++++++++++++
lib/msun/ld80/s_sinpil.c (new) | 140 ++++++++++++++++++++++++++++++++
lib/msun/ld80/s_tanpil.c (new) | 139 +++++++++++++++++++++++++++++++
lib/msun/man/cospi.3 (new) | 111 +++++++++++++++++++++++++
lib/msun/man/sinpi.3 (new) | 102 +++++++++++++++++++++++
lib/msun/man/tanpi.3 (new) | 106 ++++++++++++++++++++++++
lib/msun/src/k_cospi.h (new) | 44 ++++++++++
lib/msun/src/k_sinpi.h (new) | 43 ++++++++++
lib/msun/src/math.h | 9 ++
lib/msun/src/s_cospi.c (new) | 151 ++++++++++++++++++++++++++++++++++
lib/msun/src/s_cospif.c (new) | 109 +++++++++++++++++++++++++
lib/msun/src/s_sinpi.c (new) | 168 ++++++++++++++++++++++++++++++++++++++
lib/msun/src/s_sinpif.c (new) | 122 ++++++++++++++++++++++++++++
lib/msun/src/s_tanpi.c (new) | 176 ++++++++++++++++++++++++++++++++++++++++
lib/msun/src/s_tanpif.c (new) | 114 ++++++++++++++++++++++++++
24 files changed, 2203 insertions(+), 2 deletions(-)
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Received on Tue Oct 26 2021 - 02:07:01 UTC