glibc/math/Versions
Joseph Myers 55a38f8236 Add llogb, llogbf, llogbl.
TS 18661-1 defines llogb functions that are like ilogb except that
they return long int instead of int.  Corresponding FP_LLOGB* macros
are defined, whose values are required to have the obvious
correspondence to those of the FP_ILOGB* macros.

This patch implements these functions and macros for glibc.  llogb
uses the type-generic infrastructure, with an implementation similar
to the wrapper for ilogb but with additional conversion from FP_ILOGB*
to FP_LLOGB*; this approach avoids needing to modify or duplicate any
of the architecture-specific ilogb implementations.  Tests are also
based on those for ilogb.

Ideally the llogb functions would alias the ilogb ones when long is
32-bit, but such aliasing requires the associated header declarations
of the different-type alias to be hidden, typically by defining macros
before including the header (see e.g. how
sysdeps/ieee754/dbl-64/wordsize-64/s_llround.c defines lround to
__hidden_lround before including <math.h>).  The infrastructure for
type-generic function implementations does not support defining such
macros at present (since C code can't define a macro whose name is
determined by other macros).  So this patch leaves them as separate
functions (similar to e.g. scalbln and scalbn being separate in such a
case as well), but with the remapping of FP_ILOGB* to FP_LLOGB*
conditioned out in the case where it would be the identity map.

Tested for x86_64, x86, mips64 and powerpc.

	* math/bits/mathcalls.h [__GLIBC_USE (IEC_60559_BFP_EXT)] (llogb):
	New declaration.
	* math/tgmath.h [__GLIBC_USE (IEC_60559_BFP_EXT)] (llogb): New
	macro.
	* math/math.h [__GLIBC_USE (IEC_60559_BFP_EXT)] (__FP_LONG_MAX):
	New macro.
	[__GLIBC_USE (IEC_60559_BFP_EXT)] (FP_LLOGB0): Likewise.
	[__GLIBC_USE (IEC_60559_BFP_EXT)] (FP_LLOGBNAN): Likewise.
	* math/Versions (llogb): New libm symbol at version GLIBC_2.25.
	(llogbf): Likewise.
	(llogbl): Likewise.
	* math/Makefile (gen-libm-calls): Add w_llogbF.
	(tests): Add test-fp-llogb-constants.
	* math/w_llogb_template.c: New file.  Based on
	math/w_ilogb_template.c.
	* math/libm-test.inc (llogb_test_data): New array.
	(llogb_test): New function.
	(main): Call llogb_test.
	* math/test-fp-llogb-constants.c: New file.  Based on
	math/test-fp-ilogb-constants.c.
	* math/test-tgmath-ret.c (llogb): New CHECK_RET_CONST call.
	(do_test): Call check_return_llogb.
	* math/test-tgmath.c (NCALLS): Increase to 126.
	(F(compile_test)): Call llogb.
	(F(llogb)): New function.
	* manual/math.texi (Exponents and Logarithms): Document llogb,
	llogbf, llogbl, FP_LLOGB0 and FP_LLOGBNAN.
	* manual/libm-err-tab.pl (@all_functions): Add llogb.
	* sysdeps/ieee754/ldbl-opt/nldbl-llogb.c: New file.
	* sysdeps/ieee754/ldbl-opt/w_llogbl.c: Likewise.
	* sysdeps/ieee754/ldbl-opt/Makefile (libnldbl-calls): Add llogb.
	(CFLAGS-nldbl-llogb.c): New variable.
	* sysdeps/nacl/libm.abilist: Update.
	* sysdeps/unix/sysv/linux/aarch64/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/alpha/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/arm/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/hppa/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/i386/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/ia64/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/m68k/coldfire/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/m68k/m680x0/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/microblaze/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/mips/mips32/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/mips/mips64/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/nios2/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/powerpc/powerpc32/fpu/libm.abilist:
	Likewise.
	* sysdeps/unix/sysv/linux/powerpc/powerpc32/nofpu/libm.abilist:
	Likewise.
	* sysdeps/unix/sysv/linux/powerpc/powerpc64/libm-le.abilist:
	Likewise.
	* sysdeps/unix/sysv/linux/powerpc/powerpc64/libm.abilist:
	Likewise.
	* sysdeps/unix/sysv/linux/s390/s390-32/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/s390/s390-64/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/sh/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/sparc/sparc32/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/sparc/sparc64/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/tile/tilegx/tilegx32/libm.abilist:
	Likewise.
	* sysdeps/unix/sysv/linux/tile/tilegx/tilegx64/libm.abilist:
	Likewise.
	* sysdeps/unix/sysv/linux/tile/tilepro/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/x86_64/64/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/x86_64/x32/libm.abilist: Likewise.
2016-12-02 01:42:49 +00:00

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libc {
GLIBC_2.0 {
# functions used in inline functions or macros
__isnan; __isnanf; __isnanl; __finite; __finitef; __finitel;
__isinf; __isinff; __isinfl;
# global variables
__fpu_control;
# c*
copysign; copysignf; copysignl;
# f*
finite; finitef; finitel; frexp; frexpf; frexpl;
# i*
isinf; isinff; isinfl; isnan; isnanf; isnanl; ldexp; ldexpf; ldexpl;
# m*
modf; modff; modfl;
# s*
scalbn; scalbnf; scalbnl;
}
GLIBC_2.1 {
# functions used in inline functions or macros
__signbit; __signbitf; __signbitl;
# s*
scalbln; scalblnf; scalblnl;
}
GLIBC_2.20 {
}
}
libm {
GLIBC_2.0 {
# mathematical functions
acos; acosf; acosl;
acosh; acoshf; acoshl;
asin; asinf; asinl;
asinh; asinhf; asinhl;
atan2; atan2f; atan2l;
atan; atanf; atanl;
atanh; atanhf; atanhl;
cbrt; cbrtf; cbrtl;
ceil; ceilf; ceill;
copysign; copysignf; copysignl;
cos; cosf; cosl;
coshf; cosh; coshl;
drem; dremf; dreml;
erf; erff; erfl;
erfc; erfcf; erfcl;
exp; expf; expl;
expm1; expm1f; expm1l;
fabs; fabsf; fabsl;
finite; finitef; finitel;
floor; floorf; floorl;
fmod; fmodf; fmodl;
frexp; frexpf; frexpl;
gamma; gammaf; gammal;
gamma_r; gammaf_r; gammal_r;
hypot; hypotf; hypotl;
ilogb; ilogbf; ilogbl;
j0; j0f; j0l;
j1; j1f; j1l;
jn; jnf; jnl;
ldexp; ldexpf; ldexpl;
lgamma; lgammaf; lgammal;
lgamma_r; lgammaf_r; lgammal_r;
log10; log10f; log10l;
log1p; log1pf; log1pl;
log; logf; logl;
logb; logbf; logbl;
matherr;
modf; modff; modfl;
nextafter; nextafterf; nextafterl;
pow; powf; powl;
remainder; remainderf; remainderl;
rint; rintf; rintl;
scalb; scalbf; scalbl;
scalbn; scalbnf; scalbnl;
significand; significandf; significandl;
sin; sinf; sinl;
sinh; sinhf; sinhl;
sqrt; sqrtf; sqrtl;
tan; tanf; tanl;
tanh; tanhf; tanhl;
y0; y0f; y0l;
y1; y1f; y1l;
yn; ynf; ynl;
# global variables
_LIB_VERSION; signgam;
}
GLIBC_2.1 {
# mathematical functions
exp2; exp2f; # exp2l; -- bug omitted this until GLIBC_2.4 (below)
exp10; exp10f; exp10l;
fdim; fdimf; fdiml;
fma; fmaf; fmal;
fmax; fmaxf; fmaxl;
fmin; fminf; fminl;
log2; log2f; log2l;
nan; nanf; nanl;
nearbyint; nearbyintf; nearbyintl;
nexttoward; nexttowardf; nexttowardl;
pow10; pow10f; pow10l;
remquo; remquof; remquol;
lrint; lrintf; lrintl;
llrint; llrintf; llrintl;
round; roundf; roundl;
lround; lroundf; lroundl;
llround; llroundf; llroundl;
scalbln; scalblnf; scalblnl;
sincos; sincosf; sincosl;
trunc; truncf; truncl;
tgamma; tgammaf; tgammal;
# complex functions
cabs; cabsf; cabsl;
cacos; cacosf; cacosl;
cacosh; cacoshf; cacoshl;
carg; cargf; cargl;
casin; casinf; casinl;
casinh; casinhf; casinhl;
catan; catanf; catanl;
catanh; catanhf; catanhl;
ccos; ccosf; ccosl;
ccosh; ccoshf; ccoshl;
cexp; cexpf; cexpl;
cimag; cimagf; cimagl;
clog; clogf; clogl;
clog10; clog10f; clog10l;
__clog10; __clog10f; __clog10l;
conj; conjf; conjl;
cpow; cpowf; cpowl;
cproj; cprojf; cprojl;
creal; crealf; creall;
csin; csinf; csinl;
csinh; csinhf; csinhl;
csqrt; csqrtf; csqrtl;
ctan; ctanf; ctanl;
ctanh; ctanhf; ctanhl;
# fp environment functions
feclearexcept; fegetenv; fegetexceptflag;
fegetround; feholdexcept; feraiseexcept;
fesetenv; fesetexceptflag; fesetround;
fetestexcept; feupdateenv;
# functions used in inline functions or macros
__finite; __finitef; __finitel;
__fpclassify; __fpclassifyf; __fpclassifyl;
__signbit; __signbitf; __signbitl;
}
GLIBC_2.2 {
# fp environment functions changes from ISO C99 TR1
feclearexcept; fegetenv; fegetexceptflag; feraiseexcept;
fesetenv; fesetexceptflag; feupdateenv;
# fp environment function
feenableexcept; fedisableexcept; fegetexcept;
}
GLIBC_2.4 {
# A bug in sysdeps/generic/w_exp2.c kept this from appearing
# in GLIBC_2.1 as it should have on platforms using that
# implementation file. On others, sysdeps/CPU/Versions now
# puts exp2l in GLIBC_2.1, which will override this entry.
exp2l;
}
GLIBC_2.15 {
# Optimized -ffinite-math-only entry points
__acos_finite; __acosf_finite; __acosl_finite;
__acosh_finite; __acoshf_finite; __acoshl_finite;
__asin_finite; __asinf_finite; __asinl_finite;
__atan2_finite; __atan2f_finite; __atan2l_finite;
__atanh_finite; __atanhf_finite; __atanhl_finite;
__cosh_finite; __coshf_finite; __coshl_finite;
__exp10_finite; __exp10f_finite; __exp10l_finite;
__exp2_finite; __exp2f_finite; __exp2l_finite;
__fmod_finite; __fmodf_finite; __fmodl_finite;
__hypot_finite; __hypotf_finite; __hypotl_finite;
__j0_finite; __j0f_finite; __j0l_finite;
__y0_finite; __y0f_finite; __y0l_finite;
__j1_finite; __j1f_finite; __j1l_finite;
__y1_finite; __y1f_finite; __y1l_finite;
__jn_finite; __jnf_finite; __jnl_finite;
__yn_finite; __ynf_finite; __ynl_finite;
__lgamma_r_finite; __lgammaf_r_finite; __lgammal_r_finite;
__log_finite; __logf_finite; __logl_finite;
__log10_finite; __log10f_finite; __log10l_finite;
__log2_finite; __log2f_finite; __log2l_finite;
__pow_finite; __powf_finite; __powl_finite;
__remainder_finite; __remainderf_finite; __remainderl_finite;
__scalb_finite; __scalbf_finite; __scalbl_finite;
__sinh_finite; __sinhf_finite; __sinhl_finite;
__sqrt_finite; __sqrtf_finite; __sqrtl_finite;
__gamma_r_finite; __gammaf_r_finite; __gammal_r_finite;
__exp_finite; __expf_finite; __expl_finite;
}
GLIBC_2.18 {
__issignaling; __issignalingf; __issignalingl;
}
GLIBC_2.23 {
# The __signgam name must be exported for the signgam weak alias
# to work. New symbol versions of lgamma* that set __signgam are
# needed to preserve compatibility with old binaries that have a
# dynamic symbol for signgam but not __signgam.
lgamma; lgammaf; lgammal; __signgam;
}
GLIBC_2.24 {
nextup; nextupf; nextupl;
nextdown; nextdownf; nextdownl;
}
GLIBC_2.25 {
fesetexcept; fetestexceptflag; fegetmode; fesetmode;
__iscanonicall; __iseqsigf; __iseqsig; __iseqsigl;
totalorder; totalorderf; totalorderl;
totalordermag; totalordermagf; totalordermagl;
getpayload; getpayloadf; getpayloadl;
canonicalize; canonicalizef; canonicalizel;
setpayload; setpayloadf; setpayloadl;
setpayloadsig; setpayloadsigf; setpayloadsigl;
llogb; llogbf; llogbl;
}
}