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1f8e5847df
The current gamma, gamma_r, gammaf and gammaf_r functions return
|gamma(x)| instead of ln(|gamma(x)|) due to a change made back in 2002
to the __ieee754_gamma_r implementation. This patch fixes that, making
all of these functions map too their lgamma equivalents.
To fix the underlying bug, the __ieee754_gamma functions have been
changed to return gamma(x), removing the _r variants as those are no
longer necessary. Their names have been changed to __ieee754_tgamma to
avoid potential confusion from users.
Now that the __ieee754_tgamma functions return the correctly signed
value, the tgamma functions have been modified to use them.
libm.a now exposes the following gamma functions:
ln(|gamma(x)|):
__ieee754_lgamma_r
__ieee754_lgammaf_r
lgamma
lgamma_r
gamma
gamma_r
lgammaf
lgammaf_r
gammaf
gammaf_r
lgammal (on machines where long double is double)
gamma(x):
__ieee754_tgamma
__ieee754_tgammaf
tgamma
tgammaf
tgammal (on machines where long double is double)
Additional aliases for any of the above functions can be added if
necessary; in particular, I'm not sure if we need to include
__ieee754_gamma*_r functions (which would return ln(|(gamma(x)|).
Signed-off-by: Keith Packard <keithp@keithp.com>
----
v2:
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85 lines
2.4 KiB
Makefile
85 lines
2.4 KiB
Makefile
## Process this file with automake to generate Makefile.in
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AUTOMAKE_OPTIONS = cygnus
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INCLUDES = -I$(srcdir)/../common $(NEWLIB_CFLAGS) $(CROSS_CFLAGS) $(TARGET_CFLAGS)
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src = k_standard.c k_rem_pio2.c \
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k_cos.c k_sin.c k_tan.c \
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e_acos.c e_acosh.c e_asin.c e_atan2.c \
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e_atanh.c e_cosh.c e_exp.c e_fmod.c \
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e_tgamma.c e_hypot.c e_j0.c \
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e_j1.c e_jn.c er_lgamma.c \
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e_log.c e_log10.c e_pow.c e_rem_pio2.c e_remainder.c \
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e_scalb.c e_sinh.c e_sqrt.c \
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w_acos.c w_acosh.c w_asin.c w_atan2.c \
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w_atanh.c w_cosh.c w_exp.c w_fmod.c \
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w_gamma.c wr_gamma.c w_hypot.c w_j0.c \
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w_j1.c w_jn.c w_lgamma.c wr_lgamma.c \
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w_log.c w_log10.c w_pow.c w_remainder.c \
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w_scalb.c w_sinh.c w_sqrt.c \
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w_sincos.c \
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w_drem.c \
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s_asinh.c s_atan.c s_ceil.c \
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s_cos.c s_erf.c s_fabs.c s_floor.c \
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s_frexp.c s_ldexp.c \
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s_signif.c s_sin.c \
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s_tan.c s_tanh.c \
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w_exp2.c w_tgamma.c
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fsrc = kf_rem_pio2.c \
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kf_cos.c kf_sin.c kf_tan.c \
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ef_acos.c ef_acosh.c ef_asin.c ef_atan2.c \
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ef_atanh.c ef_cosh.c ef_exp.c ef_fmod.c \
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ef_tgamma.c ef_hypot.c ef_j0.c \
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ef_j1.c ef_jn.c erf_lgamma.c \
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ef_log.c ef_log10.c ef_pow.c ef_rem_pio2.c ef_remainder.c \
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ef_scalb.c ef_sinh.c ef_sqrt.c \
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wf_acos.c wf_acosh.c wf_asin.c wf_atan2.c \
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wf_atanh.c wf_cosh.c wf_exp.c wf_fmod.c \
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wf_gamma.c wrf_gamma.c wf_hypot.c wf_j0.c \
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wf_j1.c wf_jn.c wf_lgamma.c wrf_lgamma.c \
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wf_log.c wf_log10.c wf_pow.c wf_remainder.c \
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wf_scalb.c wf_sinh.c wf_sqrt.c \
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wf_sincos.c \
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wf_drem.c \
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sf_asinh.c sf_atan.c sf_ceil.c \
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sf_cos.c sf_erf.c sf_fabs.c sf_floor.c \
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sf_frexp.c sf_ldexp.c \
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sf_signif.c sf_sin.c \
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sf_tan.c sf_tanh.c \
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wf_exp2.c wf_tgamma.c \
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wf_log2.c
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lsrc = el_hypot.c
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libmath_la_LDFLAGS = -Xcompiler -nostdlib
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if USE_LIBTOOL
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noinst_LTLIBRARIES = libmath.la
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libmath_la_SOURCES = $(src) $(fsrc) $(lsrc)
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noinst_DATA = objectlist.awk.in
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else
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noinst_LIBRARIES = lib.a
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lib_a_SOURCES = $(src) $(fsrc) $(lsrc)
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lib_a_CFLAGS = $(AM_CFLAGS)
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noinst_DATA =
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endif # USE_LIBTOOL
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include $(srcdir)/../../Makefile.shared
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CHEWOUT_FILES = w_acos.def w_acosh.def w_asin.def s_asinh.def \
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s_atan.def w_atan2.def w_atanh.def w_j0.def \
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w_cosh.def s_erf.def w_exp.def w_exp2.def \
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s_fabs.def s_floor.def w_fmod.def s_frexp.def \
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w_gamma.def w_hypot.def s_ldexp.def w_log.def \
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w_log10.def \
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w_pow.def w_remainder.def s_sin.def w_sinh.def \
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w_sqrt.def s_tan.def s_tanh.def
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CHAPTERS = math.tex
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# A partial dependency list.
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$(lib_a_OBJECTS): $(srcdir)/../../libc/include/math.h $(srcdir)/../common/fdlibm.h
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