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glibc/sysdeps/ieee754/dbl-64
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Patrick McGehearty a14d8acd32 Improves __ieee754_exp(x) performance by 18-37% when |x| < 1.0397 
Adds a fast path to e_exp.c when |x| < 1.03972053527832.
When values are tested in isolation, reduction in execution
time is: aarch 30%, sparc 18%, x86 37%.
When comparing benchtests/bench.out which includes values
outside that range, the gains are:
aarch 8%, sparc 5%, x86 9%.

make check is clean (no increase in ulp for any math test).
Testing 20M values for each rounding mode in that range shows
approximately one in 200 values is off by 1 ulp. No value tested
for exp(x) changed by 2 or more ulp.

No observed change in performance or accuracy for x outside
fast path range.

These changes will be active for all platforms that don't provide
their own exp() routines. They will also be active for ieee754
versions of ccos, ccosh, cosh, csin, csinh, sinh, exp10, gamma, and
erf.
 		2018-04-15 18:46:37 -04:00
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wordsize-64 Rename all __ieee754_sqrt(f/l) calls to sqrt(f/l) 2018-03-15 19:21:36 +00:00
Makefile
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MathLib.h Update copyright dates with scripts/update-copyrights. 2018-01-01 00:32:25 +00:00
asincos.tbl Update copyright dates with scripts/update-copyrights. 2018-01-01 00:32:25 +00:00
atnat.h Update copyright dates with scripts/update-copyrights. 2018-01-01 00:32:25 +00:00
atnat2.h Update copyright dates with scripts/update-copyrights. 2018-01-01 00:32:25 +00:00
branred.c Update copyright dates with scripts/update-copyrights. 2018-01-01 00:32:25 +00:00
branred.h Update copyright dates with scripts/update-copyrights. 2018-01-01 00:32:25 +00:00
dbl2mpn.c Update copyright dates with scripts/update-copyrights. 2018-01-01 00:32:25 +00:00
dla.h Update copyright dates with scripts/update-copyrights. 2018-01-01 00:32:25 +00:00
doasin.c Update copyright dates with scripts/update-copyrights. 2018-01-01 00:32:25 +00:00
doasin.h Update copyright dates with scripts/update-copyrights. 2018-01-01 00:32:25 +00:00
dosincos.c Update copyright dates with scripts/update-copyrights. 2018-01-01 00:32:25 +00:00
dosincos.h Update copyright dates with scripts/update-copyrights. 2018-01-01 00:32:25 +00:00
e_acos.c
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e_acosh.c Rename all __ieee754_sqrt(f/l) calls to sqrt(f/l) 2018-03-15 19:21:36 +00:00
e_asin.c Update copyright dates with scripts/update-copyrights. 2018-01-01 00:32:25 +00:00
e_atan2.c Update copyright dates with scripts/update-copyrights. 2018-01-01 00:32:25 +00:00
e_atanh.c Update copyright dates with scripts/update-copyrights. 2018-01-01 00:32:25 +00:00
e_cosh.c
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e_exp.c Improves __ieee754_exp(x) performance by 18-37% when |x| < 1.0397 2018-04-15 18:46:37 -04:00
e_exp2.c Update copyright dates with scripts/update-copyrights. 2018-01-01 00:32:25 +00:00
e_exp10.c Update copyright dates with scripts/update-copyrights. 2018-01-01 00:32:25 +00:00
e_fmod.c
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e_gamma_r.c Rename all __ieee754_sqrt(f/l) calls to sqrt(f/l) 2018-03-15 19:21:36 +00:00
e_hypot.c Rename all __ieee754_sqrt(f/l) calls to sqrt(f/l) 2018-03-15 19:21:36 +00:00
e_ilogb.c
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e_j0.c Rename all __ieee754_sqrt(f/l) calls to sqrt(f/l) 2018-03-15 19:21:36 +00:00
e_j1.c Rename all __ieee754_sqrt(f/l) calls to sqrt(f/l) 2018-03-15 19:21:36 +00:00
e_jn.c Rename all __ieee754_sqrt(f/l) calls to sqrt(f/l) 2018-03-15 19:21:36 +00:00
e_lgamma_r.c
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e_log.c Remove slow paths from log 2018-02-07 12:24:43 +00:00
e_log2.c
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e_log10.c
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e_pow.c Remove slow paths from pow 2018-02-12 10:47:09 +00:00
e_rem_pio2.c
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e_remainder.c Update copyright dates with scripts/update-copyrights. 2018-01-01 00:32:25 +00:00
e_sinh.c
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e_sqrt.c Update copyright dates with scripts/update-copyrights. 2018-01-01 00:32:25 +00:00
eexp.tbl Improves __ieee754_exp(x) performance by 18-37% when |x| < 1.0397 2018-04-15 18:46:37 -04:00
gamma_product.c Update copyright dates with scripts/update-copyrights. 2018-01-01 00:32:25 +00:00
gamma_productf.c Update copyright dates with scripts/update-copyrights. 2018-01-01 00:32:25 +00:00
k_cos.c
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k_rem_pio2.c
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k_sin.c
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k_tan.c
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lgamma_neg.c Update copyright dates with scripts/update-copyrights. 2018-01-01 00:32:25 +00:00
lgamma_product.c Update copyright dates with scripts/update-copyrights. 2018-01-01 00:32:25 +00:00
mpa-arch.h Update copyright dates with scripts/update-copyrights. 2018-01-01 00:32:25 +00:00
mpa.c Update copyright dates with scripts/update-copyrights. 2018-01-01 00:32:25 +00:00
mpa.h Remove mplog and mpexp 2018-02-15 12:41:05 +00:00
mpatan.c Update copyright dates with scripts/update-copyrights. 2018-01-01 00:32:25 +00:00
mpatan.h Update copyright dates with scripts/update-copyrights. 2018-01-01 00:32:25 +00:00
mpatan2.c Update copyright dates with scripts/update-copyrights. 2018-01-01 00:32:25 +00:00
mpn2dbl.c Update copyright dates with scripts/update-copyrights. 2018-01-01 00:32:25 +00:00
mpsqrt.c Update copyright dates with scripts/update-copyrights. 2018-01-01 00:32:25 +00:00
mpsqrt.h Update copyright dates with scripts/update-copyrights. 2018-01-01 00:32:25 +00:00
mptan.c Update copyright dates with scripts/update-copyrights. 2018-01-01 00:32:25 +00:00
mydefs.h Update copyright dates with scripts/update-copyrights. 2018-01-01 00:32:25 +00:00
powtwo.tbl Update copyright dates with scripts/update-copyrights. 2018-01-01 00:32:25 +00:00
root.tbl Update copyright dates with scripts/update-copyrights. 2018-01-01 00:32:25 +00:00
s_asinh.c Rename all __ieee754_sqrt(f/l) calls to sqrt(f/l) 2018-03-15 19:21:36 +00:00
s_atan.c Update copyright dates with scripts/update-copyrights. 2018-01-01 00:32:25 +00:00
s_cbrt.c Update copyright dates with scripts/update-copyrights. 2018-01-01 00:32:25 +00:00
s_ceil.c
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s_copysign.c
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s_cos.c
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s_erf.c
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s_expm1.c
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s_f32xaddf64.c Add narrowing add functions. 2018-02-10 02:08:43 +00:00
s_f32xsubf64.c Add narrowing subtract functions. 2018-03-20 00:34:52 +00:00
s_fabs.c
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s_fadd.c Add narrowing add functions. 2018-02-10 02:08:43 +00:00
s_finite.c Move LDBL_CLASSIFY_COMPAT to its own header. 2018-02-01 21:01:00 +00:00
s_floor.c
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s_fma.c Update copyright dates with scripts/update-copyrights. 2018-01-01 00:32:25 +00:00
s_fmaf.c Update copyright dates with scripts/update-copyrights. 2018-01-01 00:32:25 +00:00
s_fpclassify.c Update copyright dates with scripts/update-copyrights. 2018-01-01 00:32:25 +00:00
s_frexp.c
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s_fromfp.c
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s_fromfp_main.c Update copyright dates with scripts/update-copyrights. 2018-01-01 00:32:25 +00:00
s_fromfpx.c
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s_fsub.c Add narrowing subtract functions. 2018-03-20 00:34:52 +00:00
s_getpayload.c Update copyright dates with scripts/update-copyrights. 2018-01-01 00:32:25 +00:00
s_isinf.c Move LDBL_CLASSIFY_COMPAT to its own header. 2018-02-01 21:01:00 +00:00
s_isnan.c Move LDBL_CLASSIFY_COMPAT to its own header. 2018-02-01 21:01:00 +00:00
s_issignaling.c Update copyright dates with scripts/update-copyrights. 2018-01-01 00:32:25 +00:00
s_llrint.c Update copyright dates with scripts/update-copyrights. 2018-01-01 00:32:25 +00:00
s_llround.c Update copyright dates with scripts/update-copyrights. 2018-01-01 00:32:25 +00:00
s_log1p.c Fix -Os log1p, log1pf build (bug 21314). 2018-02-01 20:40:48 +00:00
s_logb.c
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s_lrint.c Update copyright dates with scripts/update-copyrights. 2018-01-01 00:32:25 +00:00
s_lround.c Update copyright dates with scripts/update-copyrights. 2018-01-01 00:32:25 +00:00
s_modf.c
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s_nearbyint.c
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s_nexttoward.c
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s_nextup.c Update copyright dates with scripts/update-copyrights. 2018-01-01 00:32:25 +00:00
s_remquo.c Update copyright dates with scripts/update-copyrights. 2018-01-01 00:32:25 +00:00
s_rint.c
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s_round.c Update copyright dates with scripts/update-copyrights. 2018-01-01 00:32:25 +00:00
s_roundeven.c Update copyright dates with scripts/update-copyrights. 2018-01-01 00:32:25 +00:00
s_scalbln.c
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s_scalbn.c
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s_setpayload.c
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s_setpayload_main.c Update copyright dates with scripts/update-copyrights. 2018-01-01 00:32:25 +00:00
s_setpayloadsig.c
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s_signbit.c Update copyright dates with scripts/update-copyrights. 2018-01-01 00:32:25 +00:00
s_sin.c [PATCH 7/7] sin/cos slow paths: refactor sincos implementation 2018-04-03 16:52:18 +01:00
s_sincos.c [PATCH 7/7] sin/cos slow paths: refactor sincos implementation 2018-04-03 16:52:18 +01:00
s_tan.c Update copyright dates with scripts/update-copyrights. 2018-01-01 00:32:25 +00:00
s_tanh.c
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s_totalorder.c Update copyright dates with scripts/update-copyrights. 2018-01-01 00:32:25 +00:00
s_totalordermag.c Update copyright dates with scripts/update-copyrights. 2018-01-01 00:32:25 +00:00
s_trunc.c Update copyright dates with scripts/update-copyrights. 2018-01-01 00:32:25 +00:00
s_ufromfp.c
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s_ufromfpx.c
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sincos32.c Update copyright dates with scripts/update-copyrights. 2018-01-01 00:32:25 +00:00
sincos32.h Update copyright dates with scripts/update-copyrights. 2018-01-01 00:32:25 +00:00
sincostab.c Update copyright dates with scripts/update-copyrights. 2018-01-01 00:32:25 +00:00
t_exp.c Update copyright dates with scripts/update-copyrights. 2018-01-01 00:32:25 +00:00
t_exp2.h
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uasncs.h Update copyright dates with scripts/update-copyrights. 2018-01-01 00:32:25 +00:00
uatan.tbl Update copyright dates with scripts/update-copyrights. 2018-01-01 00:32:25 +00:00
uexp.h Remove slow paths from exp 2018-02-12 11:33:33 +00:00
uexp.tbl Update copyright dates with scripts/update-copyrights. 2018-01-01 00:32:25 +00:00
ulog.h Remove slow paths from log 2018-02-07 12:24:43 +00:00
ulog.tbl Update copyright dates with scripts/update-copyrights. 2018-01-01 00:32:25 +00:00
upow.h Update copyright dates with scripts/update-copyrights. 2018-01-01 00:32:25 +00:00
upow.tbl Update copyright dates with scripts/update-copyrights. 2018-01-01 00:32:25 +00:00
urem.h Update copyright dates with scripts/update-copyrights. 2018-01-01 00:32:25 +00:00
usncs.h Update copyright dates with scripts/update-copyrights. 2018-01-01 00:32:25 +00:00
utan.h Update copyright dates with scripts/update-copyrights. 2018-01-01 00:32:25 +00:00
utan.tbl Update copyright dates with scripts/update-copyrights. 2018-01-01 00:32:25 +00:00
x2y2m1.c Update copyright dates with scripts/update-copyrights. 2018-01-01 00:32:25 +00:00
x2y2m1f.c Update copyright dates with scripts/update-copyrights. 2018-01-01 00:32:25 +00:00