glibc/sysdeps/ieee754/dbl-64
Akila Welihinda 3b1402b3fc sysdeps: Simplify sin Taylor Series calculation
The macro TAYLOR_SIN adds the term `-0.5*da*a^2 + da` in hopes
of regaining some precision as a function of da. However the
comment says we add the term `-0.5*da*a^2 + 0.5*da` which is
different. This fix updates the comment to reflect the
code and also simplifies the calculation by replacing `a` with `x`
because they always have the same value.

Signed-off-by: Akila Welihinda <akilawelihinda@ucla.edu>
Reviewed-by: Paul Zimmermann <Paul.Zimmermann@inria.fr>
2021-12-13 15:31:05 +01:00
..
asincos.tbl Remove "Contributed by" lines 2021-09-03 22:06:44 +05:30
atnat2.h Remove "Contributed by" lines 2021-09-03 22:06:44 +05:30
atnat.h Remove "Contributed by" lines 2021-09-03 22:06:44 +05:30
branred.c Remove "Contributed by" lines 2021-09-03 22:06:44 +05:30
branred.h Remove "Contributed by" lines 2021-09-03 22:06:44 +05:30
dbl2mpn.c Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
dla.h Remove "Contributed by" lines 2021-09-03 22:06:44 +05:30
e_acos.c Update. 2001-03-12 00:04:52 +00:00
e_acosh.c Remove "Contributed by" lines 2021-09-03 22:06:44 +05:30
e_asin.c math: Remove slow paths from asin and acos [BZ #15267] 2021-03-11 14:26:36 +00:00
e_atan2.c math: Remove slow paths from atan2 [BZ #15267] 2021-03-11 14:26:36 +00:00
e_atanh.c Remove "Contributed by" lines 2021-09-03 22:06:44 +05:30
e_cosh.c Remove "Contributed by" lines 2021-09-03 22:06:44 +05:30
e_exp2.c Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
e_exp10.c Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
e_exp_data.c Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
e_exp.c Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
e_fmod.c Remove "Contributed by" lines 2021-09-03 22:06:44 +05:30
e_gamma_r.c Remove "Contributed by" lines 2021-09-03 22:06:44 +05:30
e_hypot.c math: Remove the error handling wrapper from hypot and hypotf 2021-12-13 10:08:46 -03:00
e_ilogb.c Format floating routines. 2013-10-17 16:03:24 +02:00
e_j0.c Add libm_alias_finite for _finite symbols 2020-01-03 10:02:04 -03:00
e_j1.c Add libm_alias_finite for _finite symbols 2020-01-03 10:02:04 -03:00
e_jn.c Add libm_alias_finite for _finite symbols 2020-01-03 10:02:04 -03:00
e_lgamma_r.c Add libm_alias_finite for _finite symbols 2020-01-03 10:02:04 -03:00
e_log2_data.c Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
e_log2.c Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
e_log10.c Remove dbl-64/wordsize-64 (part 2) 2021-01-07 15:26:26 +00:00
e_log_data.c Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
e_log.c Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
e_pow_log_data.c Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
e_pow.c Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
e_remainder.c math: Remove mpa files [BZ #15267] 2021-03-11 14:26:36 +00:00
e_sinh.c Add libm_alias_finite for _finite symbols 2020-01-03 10:02:04 -03:00
e_sqrt.c math: Remove mpa files [BZ #15267] 2021-03-11 14:26:36 +00:00
gamma_product.c Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
gamma_productf.c Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
k_rem_pio2.c Fix a few typos in comments 2019-01-12 13:44:51 +00:00
k_tan.c Replace sysdeps/ieee754/dbl-64/k_tan.c with empty file 2012-02-26 16:10:46 +01:00
lgamma_neg.c Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
lgamma_product.c Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
Makefile Add new pow implementation 2018-09-19 10:04:51 +01:00
math_config.h Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
math_err.c Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
mpn2dbl.c Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
mydefs.h Remove "Contributed by" lines 2021-09-03 22:06:44 +05:30
powtwo.tbl Remove "Contributed by" lines 2021-09-03 22:06:44 +05:30
root.tbl Remove "Contributed by" lines 2021-09-03 22:06:44 +05:30
s_asinh.c Use copysign functions not __copysign functions in glibc libm. 2018-09-27 20:04:48 +00:00
s_atan.c math: Remove slow paths from atan [BZ #15267] 2021-03-11 14:26:36 +00:00
s_cbrt.c Remove "Contributed by" lines 2021-09-03 22:06:44 +05:30
s_ceil.c Use GCC builtins for ceil functions if desired. 2019-12-11 15:12:17 +01:00
s_copysign.c Use GCC builtins for copysign functions if desired. 2019-12-11 15:12:19 +01:00
s_cos.c Update. 2001-03-12 00:04:52 +00:00
s_erf.c Move math_check_force_underflow macros to separate math-underflow.h. 2018-05-10 00:53:04 +00:00
s_expm1.c Do not include math-barriers.h in math_private.h. 2018-05-11 15:11:38 +00:00
s_f32xaddf64.c Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
s_f32xdivf64.c Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
s_f32xfmaf64.c Add narrowing fma functions 2021-09-22 21:25:31 +00:00
s_f32xmulf64.c Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
s_f32xsqrtf64.c Add narrowing square root functions 2021-09-10 20:56:22 +00:00
s_f32xsubf64.c Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
s_fabs.c Use libm_alias_double for some dbl-64 functions. 2017-09-29 23:54:33 +00:00
s_fadd.c Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
s_fdiv.c Fix f64xdivf128, f64xmulf128 spurious underflows (bug 28358) 2021-09-21 21:54:37 +00:00
s_ffma.c Add narrowing fma functions 2021-09-22 21:25:31 +00:00
s_finite.c math: Use wordsize-64 version for finite 2019-06-12 14:32:39 -03:00
s_floor.c Remove "Contributed by" lines 2021-09-03 22:06:44 +05:30
s_fma.c Add narrowing fma functions 2021-09-22 21:25:31 +00:00
s_fmaf.c Redirect fma calls to __fma in libm 2021-09-15 22:57:35 +00:00
s_fmul.c Fix f64xdivf128, f64xmulf128 spurious underflows (bug 28358) 2021-09-21 21:54:37 +00:00
s_fpclassify.c Remove "Contributed by" lines 2021-09-03 22:06:44 +05:30
s_frexp.c Remove "Contributed by" lines 2021-09-03 22:06:44 +05:30
s_fromfp_main.c Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
s_fromfp.c Use libm_alias_double for some dbl-64 functions. 2017-09-29 23:54:33 +00:00
s_fromfpx.c Use libm_alias_double for some dbl-64 functions. 2017-09-29 23:54:33 +00:00
s_fsqrt.c Add narrowing square root functions 2021-09-10 20:56:22 +00:00
s_fsub.c Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
s_getpayload.c Remove dbl-64/wordsize-64 (part 2) 2021-01-07 15:26:26 +00:00
s_isinf.c Remove "Contributed by" lines 2021-09-03 22:06:44 +05:30
s_isnan.c math: Use wordsize-64 version for isnan 2019-06-12 14:32:18 -03:00
s_issignaling.c Remove dbl-64/wordsize-64 (part 2) 2021-01-07 15:26:26 +00:00
s_llrint.c Remove "Contributed by" lines 2021-09-03 22:06:44 +05:30
s_llround.c Remove "Contributed by" lines 2021-09-03 22:06:44 +05:30
s_log1p.c Do not include math-barriers.h in math_private.h. 2018-05-11 15:11:38 +00:00
s_logb.c Remove "Contributed by" lines 2021-09-03 22:06:44 +05:30
s_lrint.c Remove "Contributed by" lines 2021-09-03 22:06:44 +05:30
s_lround.c Remove dbl-64/wordsize-64 (part 2) 2021-01-07 15:26:26 +00:00
s_modf.c Remove "Contributed by" lines 2021-09-03 22:06:44 +05:30
s_nearbyint.c Remove "Contributed by" lines 2021-09-03 22:06:44 +05:30
s_nexttoward.c Update. 1999-07-14 00:54:57 +00:00
s_nextup.c Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
s_remquo.c Remove "Contributed by" lines 2021-09-03 22:06:44 +05:30
s_rint.c Use GCC builtins for rint functions if desired. 2019-12-11 15:12:16 +01:00
s_round.c Remove "Contributed by" lines 2021-09-03 22:06:44 +05:30
s_roundeven.c Use GCC builtins for roundeven functions if desired. 2021-06-27 07:56:57 -07:00
s_scalbln.c Remove dbl-64/wordsize-64 (part 2) 2021-01-07 15:26:26 +00:00
s_scalbn.c Remove dbl-64/wordsize-64 (part 2) 2021-01-07 15:26:26 +00:00
s_setpayload_main.c Remove dbl-64/wordsize-64 (part 2) 2021-01-07 15:26:26 +00:00
s_setpayload.c Use libm_alias_double for some dbl-64 functions. 2017-09-29 23:54:33 +00:00
s_setpayloadsig.c Use libm_alias_double for some dbl-64 functions. 2017-09-29 23:54:33 +00:00
s_signbit.c Remove "Contributed by" lines 2021-09-03 22:06:44 +05:30
s_sin.c sysdeps: Simplify sin Taylor Series calculation 2021-12-13 15:31:05 +01:00
s_sincos.c Remove "Contributed by" lines 2021-09-03 22:06:44 +05:30
s_tan.c math: Remove slow paths in tan [BZ #15267] 2021-03-11 14:26:36 +00:00
s_tanh.c Move math_check_force_underflow macros to separate math-underflow.h. 2018-05-10 00:53:04 +00:00
s_totalorder.c Remove dbl-64/wordsize-64 (part 2) 2021-01-07 15:26:26 +00:00
s_totalordermag.c Remove dbl-64/wordsize-64 (part 2) 2021-01-07 15:26:26 +00:00
s_trunc.c Remove "Contributed by" lines 2021-09-03 22:06:44 +05:30
s_ufromfp.c Use libm_alias_double for some dbl-64 functions. 2017-09-29 23:54:33 +00:00
s_ufromfpx.c Use libm_alias_double for some dbl-64 functions. 2017-09-29 23:54:33 +00:00
sincostab.c Remove "Contributed by" lines 2021-09-03 22:06:44 +05:30
uasncs.h Remove "Contributed by" lines 2021-09-03 22:06:44 +05:30
uatan.tbl Remove "Contributed by" lines 2021-09-03 22:06:44 +05:30
urem.h Remove "Contributed by" lines 2021-09-03 22:06:44 +05:30
usncs.h Remove "Contributed by" lines 2021-09-03 22:06:44 +05:30
utan.h Remove "Contributed by" lines 2021-09-03 22:06:44 +05:30
utan.tbl Remove "Contributed by" lines 2021-09-03 22:06:44 +05:30
w_exp2.c Remove the error handling wrapper from exp and exp2 2018-11-21 09:55:02 +00:00
w_exp.c Remove the error handling wrapper from exp and exp2 2018-11-21 09:55:02 +00:00
w_hypot.c math: Remove the error handling wrapper from hypot and hypotf 2021-12-13 10:08:46 -03:00
w_log2.c Remove the error handling wrapper from log2 2018-11-21 09:57:21 +00:00
w_log.c Remove the error handling wrapper from log 2018-11-21 09:56:27 +00:00
w_pow.c Remove the error handling wrapper from pow 2018-11-21 09:58:36 +00:00
x2y2m1.c Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
x2y2m1f.c Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00