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392b3f0971
The CORE-MATH implementation is correctly rounded (for any rounding mode).
This can be checked by exhaustive tests in a few minutes since there are
less than 2^32 values to check against for example GNU MPFR.
This patch also adds some bench values for tgammaf.
Tested on x86_64 and x86 (cfarm26).
With the initial GNU libc code it gave on an Intel(R) Core(TM) i7-8700:
"tgammaf": {
"": {
"duration": 3.50188e+09,
"iterations": 2e+07,
"max": 602.891,
"min": 65.1415,
"mean": 175.094
}
}
With the new code:
"tgammaf": {
"": {
"duration": 3.30825e+09,
"iterations": 5e+07,
"max": 211.592,
"min": 32.0325,
"mean": 66.1649
}
}
With the initial GNU libc code it gave on cfarm26 (i686):
"tgammaf": {
"": {
"duration": 3.70505e+09,
"iterations": 6e+06,
"max": 2420.23,
"min": 243.154,
"mean": 617.509
}
}
With the new code:
"tgammaf": {
"": {
"duration": 3.24497e+09,
"iterations": 1.8e+07,
"max": 1238.15,
"min": 101.155,
"mean": 180.276
}
}
Signed-off-by: Alexei Sibidanov <sibid@uvic.ca>
Signed-off-by: Paul Zimmermann <Paul.Zimmermann@inria.fr>
Changes in v2:
- include <math.h> (fix the linknamespace failures)
- restored original benchtests/strcoll-inputs/filelist#en_US.UTF-8 file
- restored original wrapper code (math/w_tgammaf_compat.c),
except for the dealing with the sign
- removed the tgammaf/float entries in all libm-test-ulps files
- address other comments from Joseph Myers
(https://sourceware.org/pipermail/libc-alpha/2024-July/158736.html)
Changes in v3:
- pass NULL argument for signgam from w_tgammaf_compat.c
- use of math_narrow_eval
- added more comments
Changes in v4:
- initialize local_signgam to 0 in math/w_tgamma_template.c
- replace sysdeps/ieee754/dbl-64/gamma_productf.c by dummy file
Changes in v5:
- do not mention local_signgam any more in math/w_tgammaf_compat.c
- initialize local_signgam to 1 instead of 0 in w_tgamma_template.c
and added comment
Changes in v6:
- pass NULL as 2nd argument of __ieee754_gammaf_r in
w_tgammaf_compat.c, and check for NULL in e_gammaf_r.c
Changes in v7:
- added Signed-off-by line for Alexei Sibidanov (author of the code)
Changes in v8:
- added Signed-off-by line for Paul Zimmermann (submitted of the patch)
Changes in v9:
- address comments from review by Adhemerval Zanella
Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
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|---|---|---|
| .. | ||
| bits | ||
| fpu | ||
| lp64 | ||
| nofpu | ||
| nptl | ||
| sys | ||
| __longjmp.S | ||
| abort-instr.h | ||
| bsd-_setjmp.c | ||
| bsd-setjmp.c | ||
| configure | ||
| configure.ac | ||
| cpu-tunables.c | ||
| dl-audit-check.h | ||
| dl-get-cpu-features.c | ||
| dl-irel.h | ||
| dl-link.sym | ||
| dl-machine.h | ||
| dl-tls.h | ||
| dl-tlsdesc-dynamic.h | ||
| dl-tlsdesc.h | ||
| dl-tlsdesc.S | ||
| dl-trampoline.h | ||
| dl-trampoline.S | ||
| dl-tunables.list | ||
| e_sqrtl.c | ||
| fpu_control.h | ||
| hp-timing.h | ||
| Implies | ||
| jmpbuf-offsets.h | ||
| jmpbuf-unwind.h | ||
| ldsodefs.h | ||
| libc-tls.c | ||
| linkmap.h | ||
| machine-gmon.h | ||
| Makefile | ||
| math_private.h | ||
| math-use-builtins-ffs.h | ||
| preconfigure | ||
| preconfigure.ac | ||
| setjmp.S | ||
| sfp-machine.h | ||
| sotruss-lib.c | ||
| stackinfo.h | ||
| start.S | ||
| tininess.h | ||
| tlsdesc.c | ||
| tlsdesc.sym | ||
| tst-audit.h | ||
| tst-gnu2-tls2.h | ||
| tst-hwcap-tunables.c | ||