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glibc/sysdeps/ieee754/ldbl-opt
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Joseph Myers 75ad83f564 Implement C23 pown 
C23 adds various <math.h> function families originally defined in TS
18661-4.  Add the pown functions, which are like pow but with an
integer exponent.  That exponent has type long long int in C23; it was
intmax_t in TS 18661-4, and as with other interfaces changed after
their initial appearance in the TS, I don't think we need to support
the original version of the interface.  The test inputs are based on
the subset of test inputs for pow that use integer exponents that fit
in long long.

As the first such template implementation that saves and restores the
rounding mode internally (to avoid possible issues with directed
rounding and intermediate overflows or underflows in the wrong
rounding mode), support also needed to be added for using
SET_RESTORE_ROUND* in such template function implementations.  This
required math-type-macros-float128.h to include <fenv_private.h>, so
it can tell whether SET_RESTORE_ROUNDF128 is defined.  In turn, the
include order with <fenv_private.h> included before <math_private.h>
broke loongarch builds, showing up that
sysdeps/loongarch/math_private.h is really a fenv_private.h file
(maybe implemented internally before the consistent split of those
headers in 2018?) and needed to be renamed to fenv_private.h to avoid
errors with duplicate macro definitions if <math_private.h> is
included after <fenv_private.h>.

The underlying implementation uses __ieee754_pow functions (called
more than once in some cases, where the exponent does not fit in the
floating type).  I expect a custom implementation for a given format,
that only handles integer exponents but handles larger exponents
directly, could be faster and more accurate in some cases.

I encourage searching for worst cases for ulps error for these
implementations (necessarily non-exhaustively, given the size of the
input space).

Tested for x86_64 and x86, and with build-many-glibcs.py.
 		2025-03-27 10:44:44 +00:00
..
bits Update copyright dates with scripts/update-copyrights 2025-01-01 11:22:09 -08:00
Makefile Implement C23 pown 2025-03-27 10:44:44 +00:00
Versions C2x scanf binary constant handling 2023-03-02 19:10:37 +00:00
configure Convert to autoconf 2.72 (vanilla release, no distribution patches) 2024-06-17 21:15:28 +02:00
configure.ac configure: Replaced obsolete AC_TRY_COMPILE 2021-06-04 10:16:00 -03:00
libm-alias-double.h Update copyright dates with scripts/update-copyrights 2025-01-01 11:22:09 -08:00
libm-alias-ldouble.h Update copyright dates with scripts/update-copyrights 2025-01-01 11:22:09 -08:00
math_ldbl_opt.c
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math_ldbl_opt.h Use PRINTF_LDBL_IS_DBL instead of __ldbl_is_dbl. 2018-12-05 18:15:43 -02:00
nldbl-acos.c
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nldbl-acosh.c
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nldbl-acospi.c Implement C23 acospi 2024-12-09 23:01:29 +00:00
nldbl-asin.c
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nldbl-asinh.c
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nldbl-asinpi.c Implement C23 asinpi 2024-12-10 20:42:20 +00:00
nldbl-asprintf.c
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nldbl-asprintf_chk.c
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nldbl-atan.c
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nldbl-atan2.c
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nldbl-atan2pi.c Implement C23 atan2pi 2024-12-12 20:57:44 +00:00
nldbl-atanh.c
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nldbl-atanpi.c Implement C23 atanpi 2024-12-11 21:51:49 +00:00
nldbl-cabs.c
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nldbl-cacos.c
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nldbl-cacosh.c
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nldbl-canonicalize.c Update copyright dates with scripts/update-copyrights 2025-01-01 11:22:09 -08:00
nldbl-carg.c
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nldbl-casin.c
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nldbl-casinh.c
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nldbl-catan.c
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nldbl-catanh.c
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nldbl-cbrt.c
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nldbl-ccos.c
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nldbl-ccosh.c
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nldbl-ceil.c
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nldbl-cexp.c
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nldbl-cimag.c
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nldbl-clog.c
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nldbl-clog10.c
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nldbl-compat.c Update copyright dates with scripts/update-copyrights 2025-01-01 11:22:09 -08:00
nldbl-compat.h Update copyright dates with scripts/update-copyrights 2025-01-01 11:22:09 -08:00
nldbl-conj.c
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nldbl-copysign.c Use copysign functions not __copysign functions in glibc libm. 2018-09-27 20:04:48 +00:00
nldbl-cos.c
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nldbl-cosh.c
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nldbl-cospi.c Implement C23 cospi 2024-12-04 10:20:44 +00:00
nldbl-cpow.c
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nldbl-cproj.c
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nldbl-creal.c
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nldbl-csin.c
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nldbl-csinh.c
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nldbl-csqrt.c
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nldbl-ctan.c
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nldbl-ctanh.c
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nldbl-dadd.c Update copyright dates with scripts/update-copyrights 2025-01-01 11:22:09 -08:00
nldbl-ddiv.c Update copyright dates with scripts/update-copyrights 2025-01-01 11:22:09 -08:00
nldbl-dfma.c Update copyright dates with scripts/update-copyrights 2025-01-01 11:22:09 -08:00
nldbl-dmul.c Update copyright dates with scripts/update-copyrights 2025-01-01 11:22:09 -08:00
nldbl-dprintf.c
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nldbl-dprintf_chk.c
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nldbl-dsqrt.c Update copyright dates with scripts/update-copyrights 2025-01-01 11:22:09 -08:00
nldbl-dsub.c Update copyright dates with scripts/update-copyrights 2025-01-01 11:22:09 -08:00
nldbl-erf.c
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nldbl-erfc.c
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nldbl-exp.c
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nldbl-exp2.c
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nldbl-exp2m1.c Implement C23 exp2m1, exp10m1 2024-06-17 16:31:49 +00:00
nldbl-exp10.c
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nldbl-exp10m1.c Implement C23 exp2m1, exp10m1 2024-06-17 16:31:49 +00:00
nldbl-expm1.c
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nldbl-fabs.c
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nldbl-fadd.c Update copyright dates with scripts/update-copyrights 2025-01-01 11:22:09 -08:00
nldbl-fdim.c
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nldbl-fdiv.c Update copyright dates with scripts/update-copyrights 2025-01-01 11:22:09 -08:00
nldbl-ffma.c Update copyright dates with scripts/update-copyrights 2025-01-01 11:22:09 -08:00
nldbl-finite.c
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nldbl-floor.c
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nldbl-fma.c
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nldbl-fmax.c
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nldbl-fmaximum.c Update copyright dates with scripts/update-copyrights 2025-01-01 11:22:09 -08:00
nldbl-fmaximum_mag.c Update copyright dates with scripts/update-copyrights 2025-01-01 11:22:09 -08:00
nldbl-fmaximum_mag_num.c Update copyright dates with scripts/update-copyrights 2025-01-01 11:22:09 -08:00
nldbl-fmaximum_num.c Update copyright dates with scripts/update-copyrights 2025-01-01 11:22:09 -08:00
nldbl-fmaxmag.c Update copyright dates with scripts/update-copyrights 2025-01-01 11:22:09 -08:00
nldbl-fmin.c
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nldbl-fminimum.c Update copyright dates with scripts/update-copyrights 2025-01-01 11:22:09 -08:00
nldbl-fminimum_mag.c Update copyright dates with scripts/update-copyrights 2025-01-01 11:22:09 -08:00
nldbl-fminimum_mag_num.c Update copyright dates with scripts/update-copyrights 2025-01-01 11:22:09 -08:00
nldbl-fminimum_num.c Update copyright dates with scripts/update-copyrights 2025-01-01 11:22:09 -08:00
nldbl-fminmag.c Update copyright dates with scripts/update-copyrights 2025-01-01 11:22:09 -08:00
nldbl-fmod.c
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nldbl-fmul.c Update copyright dates with scripts/update-copyrights 2025-01-01 11:22:09 -08:00
nldbl-fprintf.c
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nldbl-fprintf_chk.c
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nldbl-frexp.c
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nldbl-fromfp.c Update copyright dates with scripts/update-copyrights 2025-01-01 11:22:09 -08:00
nldbl-fromfpx.c Update copyright dates with scripts/update-copyrights 2025-01-01 11:22:09 -08:00
nldbl-fscanf.c Use C99-compliant scanf under _GNU_SOURCE with modern compilers. 2019-01-03 11:12:39 -05:00
nldbl-fsqrt.c Update copyright dates with scripts/update-copyrights 2025-01-01 11:22:09 -08:00
nldbl-fsub.c Update copyright dates with scripts/update-copyrights 2025-01-01 11:22:09 -08:00
nldbl-fwprintf.c
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nldbl-fwprintf_chk.c
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nldbl-fwscanf.c Use C99-compliant scanf under _GNU_SOURCE with modern compilers. 2019-01-03 11:12:39 -05:00
nldbl-gamma.c
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nldbl-getpayload.c Update copyright dates with scripts/update-copyrights 2025-01-01 11:22:09 -08:00
nldbl-hypot.c
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nldbl-ilogb.c
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nldbl-iovfscanf.c Use C99-compliant scanf under _GNU_SOURCE with modern compilers. 2019-01-03 11:12:39 -05:00
nldbl-isinf.c
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nldbl-isnan.c
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nldbl-isoc23_fscanf.c C2x scanf binary constant handling 2023-03-02 19:10:37 +00:00
nldbl-isoc23_fwscanf.c C2x scanf binary constant handling 2023-03-02 19:10:37 +00:00
nldbl-isoc23_scanf.c C2x scanf binary constant handling 2023-03-02 19:10:37 +00:00
nldbl-isoc23_sscanf.c C2x scanf binary constant handling 2023-03-02 19:10:37 +00:00
nldbl-isoc23_swscanf.c C2x scanf binary constant handling 2023-03-02 19:10:37 +00:00
nldbl-isoc23_vfscanf.c C2x scanf binary constant handling 2023-03-02 19:10:37 +00:00
nldbl-isoc23_vfwscanf.c C2x scanf binary constant handling 2023-03-02 19:10:37 +00:00
nldbl-isoc23_vscanf.c C2x scanf binary constant handling 2023-03-02 19:10:37 +00:00
nldbl-isoc23_vsscanf.c C2x scanf binary constant handling 2023-03-02 19:10:37 +00:00
nldbl-isoc23_vswscanf.c C2x scanf binary constant handling 2023-03-02 19:10:37 +00:00
nldbl-isoc23_vwscanf.c C2x scanf binary constant handling 2023-03-02 19:10:37 +00:00
nldbl-isoc23_wscanf.c C2x scanf binary constant handling 2023-03-02 19:10:37 +00:00
nldbl-isoc99_fscanf.c
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nldbl-isoc99_fwscanf.c
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nldbl-isoc99_scanf.c
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nldbl-isoc99_sscanf.c
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nldbl-isoc99_swscanf.c
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nldbl-isoc99_vfscanf.c
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nldbl-isoc99_vfwscanf.c
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nldbl-isoc99_vscanf.c
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nldbl-isoc99_vsscanf.c
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nldbl-isoc99_vswscanf.c
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nldbl-isoc99_vwscanf.c
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nldbl-isoc99_wscanf.c
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nldbl-j0.c
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nldbl-j1.c
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nldbl-jn.c
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nldbl-ldexp.c
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nldbl-lgamma.c
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nldbl-lgamma_r.c
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nldbl-llogb.c Update copyright dates with scripts/update-copyrights 2025-01-01 11:22:09 -08:00
nldbl-llrint.c
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nldbl-llround.c
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nldbl-log.c
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nldbl-log1p.c Implement C23 logp1 2024-06-17 13:47:09 +00:00
nldbl-log2.c
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nldbl-log2p1.c Implement C23 log2p1 2024-05-20 13:41:39 +00:00
nldbl-log10.c
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nldbl-log10p1.c Implement C23 log10p1 2024-06-17 13:48:13 +00:00
nldbl-logb.c
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nldbl-lrint.c
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nldbl-lround.c
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nldbl-modf.c
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nldbl-nan.c
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nldbl-nearbyint.c
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nldbl-nextafter.c
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nldbl-nextdown.c Update copyright dates with scripts/update-copyrights 2025-01-01 11:22:09 -08:00
nldbl-nexttoward.c
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nldbl-nexttowardf.c
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nldbl-nextup.c Update copyright dates with scripts/update-copyrights 2025-01-01 11:22:09 -08:00
nldbl-obstack_printf.c
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nldbl-obstack_printf_chk.c
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nldbl-obstack_vprintf.c
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nldbl-obstack_vprintf_chk.c
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nldbl-pow.c
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nldbl-pown.c Implement C23 pown 2025-03-27 10:44:44 +00:00
nldbl-powr.c Implement C23 powr 2025-03-14 15:58:11 +00:00
nldbl-printf.c
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nldbl-printf_chk.c
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nldbl-printf_fp.c
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nldbl-printf_size.c
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nldbl-qecvt.c
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nldbl-qecvt_r.c
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nldbl-qfcvt.c
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nldbl-qfcvt_r.c
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nldbl-qgcvt.c
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nldbl-remainder.c Make drem an alias of remainder (bug 16171). 2015-10-29 22:29:21 +00:00
nldbl-remquo.c
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nldbl-rint.c
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nldbl-round.c
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nldbl-roundeven.c Update copyright dates with scripts/update-copyrights 2025-01-01 11:22:09 -08:00
nldbl-rsqrt.c Implement C23 rsqrt 2025-03-07 19:15:26 +00:00
nldbl-scalb.c
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nldbl-scalbln.c
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nldbl-scalbn.c
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nldbl-scanf.c Use C99-compliant scanf under _GNU_SOURCE with modern compilers. 2019-01-03 11:12:39 -05:00
nldbl-setpayload.c Update copyright dates with scripts/update-copyrights 2025-01-01 11:22:09 -08:00
nldbl-setpayloadsig.c Update copyright dates with scripts/update-copyrights 2025-01-01 11:22:09 -08:00
nldbl-signbit.c
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nldbl-significand.c
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nldbl-sin.c
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nldbl-sincos.c
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nldbl-sinh.c
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nldbl-sinpi.c Implement C23 sinpi 2024-12-04 20:04:04 +00:00
nldbl-snprintf.c
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nldbl-snprintf_chk.c
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nldbl-sprintf.c
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nldbl-sprintf_chk.c
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nldbl-sqrt.c
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nldbl-sscanf.c Use C99-compliant scanf under _GNU_SOURCE with modern compilers. 2019-01-03 11:12:39 -05:00
nldbl-strfmon.c
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nldbl-strfmon_l.c Use locale_t, not __locale_t, throughout glibc 2017-06-20 20:30:06 -04:00
nldbl-strfroml.c Add strfromd, strfromf, and strfroml functions 2016-10-25 17:03:54 -02:00
nldbl-strtold.c
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nldbl-strtold_l.c Use locale_t, not __locale_t, throughout glibc 2017-06-20 20:30:06 -04:00
nldbl-strtoldint.c
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nldbl-swprintf.c
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nldbl-swprintf_chk.c
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nldbl-swscanf.c Use C99-compliant scanf under _GNU_SOURCE with modern compilers. 2019-01-03 11:12:39 -05:00
nldbl-syslog.c
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nldbl-syslog_chk.c
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nldbl-tan.c
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nldbl-tanh.c
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nldbl-tanpi.c Implement C23 tanpi 2024-12-05 21:42:10 +00:00
nldbl-tgamma.c
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nldbl-totalorder.c Update copyright dates with scripts/update-copyrights 2025-01-01 11:22:09 -08:00
nldbl-totalordermag.c Update copyright dates with scripts/update-copyrights 2025-01-01 11:22:09 -08:00
nldbl-trunc.c
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nldbl-ufromfp.c Update copyright dates with scripts/update-copyrights 2025-01-01 11:22:09 -08:00
nldbl-ufromfpx.c Update copyright dates with scripts/update-copyrights 2025-01-01 11:22:09 -08:00
nldbl-vasprintf.c
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nldbl-vasprintf_chk.c
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nldbl-vdprintf.c
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nldbl-vdprintf_chk.c
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nldbl-vfprintf.c
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nldbl-vfprintf_chk.c
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nldbl-vfscanf.c Use C99-compliant scanf under _GNU_SOURCE with modern compilers. 2019-01-03 11:12:39 -05:00
nldbl-vfwprintf.c
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nldbl-vfwprintf_chk.c
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nldbl-vfwscanf.c Use C99-compliant scanf under _GNU_SOURCE with modern compilers. 2019-01-03 11:12:39 -05:00
nldbl-vprintf.c
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nldbl-vprintf_chk.c
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nldbl-vscanf.c Use C99-compliant scanf under _GNU_SOURCE with modern compilers. 2019-01-03 11:12:39 -05:00
nldbl-vsnprintf.c
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nldbl-vsnprintf_chk.c
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nldbl-vsprintf.c
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nldbl-vsprintf_chk.c
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nldbl-vsscanf.c Use C99-compliant scanf under _GNU_SOURCE with modern compilers. 2019-01-03 11:12:39 -05:00
nldbl-vswprintf.c
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nldbl-vswprintf_chk.c
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nldbl-vswscanf.c Use C99-compliant scanf under _GNU_SOURCE with modern compilers. 2019-01-03 11:12:39 -05:00
nldbl-vsyslog.c
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nldbl-vsyslog_chk.c
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nldbl-vwprintf.c
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nldbl-vwprintf_chk.c
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nldbl-vwscanf.c Use C99-compliant scanf under _GNU_SOURCE with modern compilers. 2019-01-03 11:12:39 -05:00
nldbl-wcstold.c
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nldbl-wcstold_l.c Use locale_t, not __locale_t, throughout glibc 2017-06-20 20:30:06 -04:00
nldbl-wcstoldint.c
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nldbl-wprintf.c
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nldbl-wprintf_chk.c
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nldbl-wscanf.c Use C99-compliant scanf under _GNU_SOURCE with modern compilers. 2019-01-03 11:12:39 -05:00
nldbl-y0.c
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nldbl-y1.c
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nldbl-yn.c
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s_clog10.c Update copyright dates with scripts/update-copyrights 2025-01-01 11:22:09 -08:00
s_clog10l.c Update copyright dates with scripts/update-copyrights 2025-01-01 11:22:09 -08:00
s_copysign.c Use libm_alias_double for some dbl-64 functions. 2017-09-29 23:54:33 +00:00
s_finite.c
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s_frexp.c Use libm_alias_double for dbl-64 frexp. 2017-10-03 20:56:46 +00:00
s_isinf.c
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s_isnan.c
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s_ldexp.c Update copyright dates with scripts/update-copyrights 2025-01-01 11:22:09 -08:00
s_ldexpl.c Update copyright dates with scripts/update-copyrights 2025-01-01 11:22:09 -08:00
s_modf.c Use libm_alias_double for dbl-64 modf. 2017-10-03 23:46:23 +00:00
s_nextafter.c Use libm_alias_double in math/. 2017-09-15 23:10:02 +00:00
s_nexttowardfd.c Do not include math-barriers.h in math_private.h. 2018-05-11 15:11:38 +00:00
test-narrow-macros-ldbl-64.c Add test infrastructure for narrowing libm functions. 2018-02-09 21:55:48 +00:00
test-nldbl-redirect.c Update copyright dates with scripts/update-copyrights 2025-01-01 11:22:09 -08:00
test-redirection-ldbl-64.c Update copyright dates with scripts/update-copyrights 2025-01-01 11:22:09 -08:00
tst-nldbl-scanf-binary-c11.c C2x scanf binary constant handling 2023-03-02 19:10:37 +00:00
tst-nldbl-scanf-binary-c23.c Rename c2x / gnu2x tests to c23 / gnu23 2024-02-01 17:55:57 +00:00
tst-nldbl-scanf-binary-gnu11.c C2x scanf binary constant handling 2023-03-02 19:10:37 +00:00
tst-nldbl-scanf-binary-gnu89.c C2x scanf binary constant handling 2023-03-02 19:10:37 +00:00
tst-nldbl-wscanf-binary-c11.c C2x scanf binary constant handling 2023-03-02 19:10:37 +00:00
tst-nldbl-wscanf-binary-c23.c Rename c2x / gnu2x tests to c23 / gnu23 2024-02-01 17:55:57 +00:00
tst-nldbl-wscanf-binary-gnu11.c C2x scanf binary constant handling 2023-03-02 19:10:37 +00:00
tst-nldbl-wscanf-binary-gnu89.c C2x scanf binary constant handling 2023-03-02 19:10:37 +00:00
tst-scanf-format-ldouble-a.input stdio-common: Add scanf long double data for IEEE 754 binary64 format 2025-03-25 09:40:20 +00:00
tst-scanf-format-ldouble-aa.input stdio-common: Add scanf long double data for IEEE 754 binary64 format 2025-03-25 09:40:20 +00:00
tst-scanf-format-ldouble-e.input stdio-common: Add scanf long double data for IEEE 754 binary64 format 2025-03-25 09:40:20 +00:00
tst-scanf-format-ldouble-ee.input stdio-common: Add scanf long double data for IEEE 754 binary64 format 2025-03-25 09:40:20 +00:00
tst-scanf-format-ldouble-f.input stdio-common: Add scanf long double data for IEEE 754 binary64 format 2025-03-25 09:40:20 +00:00
tst-scanf-format-ldouble-ff.input stdio-common: Add scanf long double data for IEEE 754 binary64 format 2025-03-25 09:40:20 +00:00
tst-scanf-format-ldouble-g.input stdio-common: Add scanf long double data for IEEE 754 binary64 format 2025-03-25 09:40:20 +00:00
tst-scanf-format-ldouble-gg.input stdio-common: Add scanf long double data for IEEE 754 binary64 format 2025-03-25 09:40:20 +00:00
w_exp10_compat.c Use libm_alias_double in math/. 2017-09-15 23:10:02 +00:00
w_exp10l_compat.c Use generic alias macros in ldbl-opt. 2017-10-11 02:51:39 +00:00
w_lgamma_compat.c Fix lgamma setting signgam for ISO C (bug 15421). 2015-11-20 22:49:59 +00:00
w_lgamma_compatl.c Fix ldbl-opt/w_lgamma_compatl.c libm_alias_ldouble_other usage. 2017-10-13 16:38:37 +00:00
w_remainder_compat.c Use libm_alias_double in math/. 2017-09-15 23:10:02 +00:00
w_remainderl_compat.c Use generic alias macros in ldbl-opt. 2017-10-11 02:51:39 +00:00
w_scalb_compat.c Add a generic scalb implementation 2020-02-14 08:24:56 -06:00
w_scalbl_compat.c Add a generic scalb implementation 2020-02-14 08:24:56 -06:00