diff options
author | Jeff Johnston <jjohnstn@redhat.com> | 2009-03-18 21:11:18 +0300 |
---|---|---|
committer | Jeff Johnston <jjohnstn@redhat.com> | 2009-03-18 21:11:18 +0300 |
commit | d57ff5a8acdd5653394aa6b3b688990f486d95d6 (patch) | |
tree | 7082101a893df4a65c0b6b6b7e2c15a808c5708f /newlib/libm/common | |
parent | 2db87fe669aa7ff69ddffcea32b9cb38124ae480 (diff) |
2009-03-18 Yaakov Selkowitz <yselkowitz@users.sourceforge.net>
* libm/common/s_log2.c: New file.
* libm/common/sf_log2.c: Ditto.
* libm/common/Makefile.am: Add s_log2.c and sf_log2.c.
* libm/common/Makefile.in: Regenerated.
* libc/include/math.h: Add log2 and log2f function prototypes.
Diffstat (limited to 'newlib/libm/common')
-rw-r--r-- | newlib/libm/common/Makefile.am | 8 | ||||
-rw-r--r-- | newlib/libm/common/Makefile.in | 62 | ||||
-rw-r--r-- | newlib/libm/common/s_log2.c | 73 | ||||
-rw-r--r-- | newlib/libm/common/sf_log2.c | 48 |
4 files changed, 166 insertions, 25 deletions
diff --git a/newlib/libm/common/Makefile.am b/newlib/libm/common/Makefile.am index f79a67c55..1369c25bf 100644 --- a/newlib/libm/common/Makefile.am +++ b/newlib/libm/common/Makefile.am @@ -8,7 +8,7 @@ src = s_finite.c s_copysign.c s_modf.c s_scalbn.c \ s_cbrt.c s_exp10.c s_expm1.c s_ilogb.c s_infconst.c \ s_infinity.c s_isinf.c s_isinfd.c s_isnan.c s_isnand.c \ s_log1p.c s_nan.c s_nextafter.c s_pow10.c \ - s_rint.c s_logb.c s_matherr.c s_lib_ver.c \ + s_rint.c s_logb.c s_log2.c s_matherr.c s_lib_ver.c \ s_fdim.c s_fma.c s_fmax.c s_fmin.c s_fpclassify.c s_lrint.c \ s_lround.c s_nearbyint.c s_remquo.c s_round.c s_scalbln.c \ s_signbit.c s_trunc.c @@ -17,7 +17,7 @@ fsrc = sf_finite.c sf_copysign.c sf_modf.c sf_scalbn.c \ sf_cbrt.c sf_exp10.c sf_expm1.c sf_ilogb.c \ sf_infinity.c sf_isinf.c sf_isinff.c sf_isnan.c sf_isnanf.c \ sf_log1p.c sf_nan.c sf_nextafter.c sf_pow10.c \ - sf_rint.c sf_logb.c \ + sf_rint.c sf_logb.c sf_log2.c \ sf_fdim.c sf_fma.c sf_fmax.c sf_fmin.c sf_fpclassify.c sf_lrint.c \ sf_lround.c sf_nearbyint.c sf_remquo.c sf_round.c \ sf_scalbln.c sf_trunc.c @@ -94,6 +94,10 @@ slog1p.def: s_log1p.c $(CHEW) < $(srcdir)/s_log1p.c >$@ 2>/dev/null touch stmp-def +slog2.def: s_log2.c + $(CHEW) < $(srcdir)/s_log2.c >$@ 2>/dev/null + touch stmp-def + smodf.def: s_modf.c $(CHEW) < $(srcdir)/s_modf.c >$@ 2>/dev/null touch stmp-def diff --git a/newlib/libm/common/Makefile.in b/newlib/libm/common/Makefile.in index 498b3f3f1..f84166cfb 100644 --- a/newlib/libm/common/Makefile.in +++ b/newlib/libm/common/Makefile.in @@ -67,14 +67,14 @@ am__objects_1 = lib_a-s_finite.$(OBJEXT) lib_a-s_copysign.$(OBJEXT) \ lib_a-s_log1p.$(OBJEXT) lib_a-s_nan.$(OBJEXT) \ lib_a-s_nextafter.$(OBJEXT) lib_a-s_pow10.$(OBJEXT) \ lib_a-s_rint.$(OBJEXT) lib_a-s_logb.$(OBJEXT) \ - lib_a-s_matherr.$(OBJEXT) lib_a-s_lib_ver.$(OBJEXT) \ - lib_a-s_fdim.$(OBJEXT) lib_a-s_fma.$(OBJEXT) \ - lib_a-s_fmax.$(OBJEXT) lib_a-s_fmin.$(OBJEXT) \ - lib_a-s_fpclassify.$(OBJEXT) lib_a-s_lrint.$(OBJEXT) \ - lib_a-s_lround.$(OBJEXT) lib_a-s_nearbyint.$(OBJEXT) \ - lib_a-s_remquo.$(OBJEXT) lib_a-s_round.$(OBJEXT) \ - lib_a-s_scalbln.$(OBJEXT) lib_a-s_signbit.$(OBJEXT) \ - lib_a-s_trunc.$(OBJEXT) + lib_a-s_log2.$(OBJEXT) lib_a-s_matherr.$(OBJEXT) \ + lib_a-s_lib_ver.$(OBJEXT) lib_a-s_fdim.$(OBJEXT) \ + lib_a-s_fma.$(OBJEXT) lib_a-s_fmax.$(OBJEXT) \ + lib_a-s_fmin.$(OBJEXT) lib_a-s_fpclassify.$(OBJEXT) \ + lib_a-s_lrint.$(OBJEXT) lib_a-s_lround.$(OBJEXT) \ + lib_a-s_nearbyint.$(OBJEXT) lib_a-s_remquo.$(OBJEXT) \ + lib_a-s_round.$(OBJEXT) lib_a-s_scalbln.$(OBJEXT) \ + lib_a-s_signbit.$(OBJEXT) lib_a-s_trunc.$(OBJEXT) am__objects_2 = lib_a-sf_finite.$(OBJEXT) lib_a-sf_copysign.$(OBJEXT) \ lib_a-sf_modf.$(OBJEXT) lib_a-sf_scalbn.$(OBJEXT) \ lib_a-sf_cbrt.$(OBJEXT) lib_a-sf_exp10.$(OBJEXT) \ @@ -84,13 +84,13 @@ am__objects_2 = lib_a-sf_finite.$(OBJEXT) lib_a-sf_copysign.$(OBJEXT) \ lib_a-sf_isnanf.$(OBJEXT) lib_a-sf_log1p.$(OBJEXT) \ lib_a-sf_nan.$(OBJEXT) lib_a-sf_nextafter.$(OBJEXT) \ lib_a-sf_pow10.$(OBJEXT) lib_a-sf_rint.$(OBJEXT) \ - lib_a-sf_logb.$(OBJEXT) lib_a-sf_fdim.$(OBJEXT) \ - lib_a-sf_fma.$(OBJEXT) lib_a-sf_fmax.$(OBJEXT) \ - lib_a-sf_fmin.$(OBJEXT) lib_a-sf_fpclassify.$(OBJEXT) \ - lib_a-sf_lrint.$(OBJEXT) lib_a-sf_lround.$(OBJEXT) \ - lib_a-sf_nearbyint.$(OBJEXT) lib_a-sf_remquo.$(OBJEXT) \ - lib_a-sf_round.$(OBJEXT) lib_a-sf_scalbln.$(OBJEXT) \ - lib_a-sf_trunc.$(OBJEXT) + lib_a-sf_logb.$(OBJEXT) lib_a-sf_log2.$(OBJEXT) \ + lib_a-sf_fdim.$(OBJEXT) lib_a-sf_fma.$(OBJEXT) \ + lib_a-sf_fmax.$(OBJEXT) lib_a-sf_fmin.$(OBJEXT) \ + lib_a-sf_fpclassify.$(OBJEXT) lib_a-sf_lrint.$(OBJEXT) \ + lib_a-sf_lround.$(OBJEXT) lib_a-sf_nearbyint.$(OBJEXT) \ + lib_a-sf_remquo.$(OBJEXT) lib_a-sf_round.$(OBJEXT) \ + lib_a-sf_scalbln.$(OBJEXT) lib_a-sf_trunc.$(OBJEXT) @USE_LIBTOOL_FALSE@am_lib_a_OBJECTS = $(am__objects_1) \ @USE_LIBTOOL_FALSE@ $(am__objects_2) lib_a_OBJECTS = $(am_lib_a_OBJECTS) @@ -100,17 +100,17 @@ am__objects_3 = s_finite.lo s_copysign.lo s_modf.lo s_scalbn.lo \ s_cbrt.lo s_exp10.lo s_expm1.lo s_ilogb.lo s_infconst.lo \ s_infinity.lo s_isinf.lo s_isinfd.lo s_isnan.lo s_isnand.lo \ s_log1p.lo s_nan.lo s_nextafter.lo s_pow10.lo s_rint.lo \ - s_logb.lo s_matherr.lo s_lib_ver.lo s_fdim.lo s_fma.lo \ - s_fmax.lo s_fmin.lo s_fpclassify.lo s_lrint.lo s_lround.lo \ - s_nearbyint.lo s_remquo.lo s_round.lo s_scalbln.lo \ + s_logb.lo s_log2.lo s_matherr.lo s_lib_ver.lo s_fdim.lo \ + s_fma.lo s_fmax.lo s_fmin.lo s_fpclassify.lo s_lrint.lo \ + s_lround.lo s_nearbyint.lo s_remquo.lo s_round.lo s_scalbln.lo \ s_signbit.lo s_trunc.lo am__objects_4 = sf_finite.lo sf_copysign.lo sf_modf.lo sf_scalbn.lo \ sf_cbrt.lo sf_exp10.lo sf_expm1.lo sf_ilogb.lo sf_infinity.lo \ sf_isinf.lo sf_isinff.lo sf_isnan.lo sf_isnanf.lo sf_log1p.lo \ sf_nan.lo sf_nextafter.lo sf_pow10.lo sf_rint.lo sf_logb.lo \ - sf_fdim.lo sf_fma.lo sf_fmax.lo sf_fmin.lo sf_fpclassify.lo \ - sf_lrint.lo sf_lround.lo sf_nearbyint.lo sf_remquo.lo \ - sf_round.lo sf_scalbln.lo sf_trunc.lo + sf_log2.lo sf_fdim.lo sf_fma.lo sf_fmax.lo sf_fmin.lo \ + sf_fpclassify.lo sf_lrint.lo sf_lround.lo sf_nearbyint.lo \ + sf_remquo.lo sf_round.lo sf_scalbln.lo sf_trunc.lo @USE_LIBTOOL_TRUE@am_libcommon_la_OBJECTS = $(am__objects_3) \ @USE_LIBTOOL_TRUE@ $(am__objects_4) libcommon_la_OBJECTS = $(am_libcommon_la_OBJECTS) @@ -278,7 +278,7 @@ src = s_finite.c s_copysign.c s_modf.c s_scalbn.c \ s_cbrt.c s_exp10.c s_expm1.c s_ilogb.c s_infconst.c \ s_infinity.c s_isinf.c s_isinfd.c s_isnan.c s_isnand.c \ s_log1p.c s_nan.c s_nextafter.c s_pow10.c \ - s_rint.c s_logb.c s_matherr.c s_lib_ver.c \ + s_rint.c s_logb.c s_log2.c s_matherr.c s_lib_ver.c \ s_fdim.c s_fma.c s_fmax.c s_fmin.c s_fpclassify.c s_lrint.c \ s_lround.c s_nearbyint.c s_remquo.c s_round.c s_scalbln.c \ s_signbit.c s_trunc.c @@ -287,7 +287,7 @@ fsrc = sf_finite.c sf_copysign.c sf_modf.c sf_scalbn.c \ sf_cbrt.c sf_exp10.c sf_expm1.c sf_ilogb.c \ sf_infinity.c sf_isinf.c sf_isinff.c sf_isnan.c sf_isnanf.c \ sf_log1p.c sf_nan.c sf_nextafter.c sf_pow10.c \ - sf_rint.c sf_logb.c \ + sf_rint.c sf_logb.c sf_log2.c \ sf_fdim.c sf_fma.c sf_fmax.c sf_fmin.c sf_fpclassify.c sf_lrint.c \ sf_lround.c sf_nearbyint.c sf_remquo.c sf_round.c \ sf_scalbln.c sf_trunc.c @@ -495,6 +495,12 @@ lib_a-s_logb.o: s_logb.c lib_a-s_logb.obj: s_logb.c $(CC) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(AM_CPPFLAGS) $(CPPFLAGS) $(lib_a_CFLAGS) $(CFLAGS) -c -o lib_a-s_logb.obj `if test -f 's_logb.c'; then $(CYGPATH_W) 's_logb.c'; else $(CYGPATH_W) '$(srcdir)/s_logb.c'; fi` +lib_a-s_log2.o: s_log2.c + $(CC) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(AM_CPPFLAGS) $(CPPFLAGS) $(lib_a_CFLAGS) $(CFLAGS) -c -o lib_a-s_log2.o `test -f 's_log2.c' || echo '$(srcdir)/'`s_log2.c + +lib_a-s_log2.obj: s_log2.c + $(CC) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(AM_CPPFLAGS) $(CPPFLAGS) $(lib_a_CFLAGS) $(CFLAGS) -c -o lib_a-s_log2.obj `if test -f 's_log2.c'; then $(CYGPATH_W) 's_log2.c'; else $(CYGPATH_W) '$(srcdir)/s_log2.c'; fi` + lib_a-s_matherr.o: s_matherr.c $(CC) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(AM_CPPFLAGS) $(CPPFLAGS) $(lib_a_CFLAGS) $(CFLAGS) -c -o lib_a-s_matherr.o `test -f 's_matherr.c' || echo '$(srcdir)/'`s_matherr.c @@ -699,6 +705,12 @@ lib_a-sf_logb.o: sf_logb.c lib_a-sf_logb.obj: sf_logb.c $(CC) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(AM_CPPFLAGS) $(CPPFLAGS) $(lib_a_CFLAGS) $(CFLAGS) -c -o lib_a-sf_logb.obj `if test -f 'sf_logb.c'; then $(CYGPATH_W) 'sf_logb.c'; else $(CYGPATH_W) '$(srcdir)/sf_logb.c'; fi` +lib_a-sf_log2.o: sf_log2.c + $(CC) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(AM_CPPFLAGS) $(CPPFLAGS) $(lib_a_CFLAGS) $(CFLAGS) -c -o lib_a-sf_log2.o `test -f 'sf_log2.c' || echo '$(srcdir)/'`sf_log2.c + +lib_a-sf_log2.obj: sf_log2.c + $(CC) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(AM_CPPFLAGS) $(CPPFLAGS) $(lib_a_CFLAGS) $(CFLAGS) -c -o lib_a-sf_log2.obj `if test -f 'sf_log2.c'; then $(CYGPATH_W) 'sf_log2.c'; else $(CYGPATH_W) '$(srcdir)/sf_log2.c'; fi` + lib_a-sf_fdim.o: sf_fdim.c $(CC) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(AM_CPPFLAGS) $(CPPFLAGS) $(lib_a_CFLAGS) $(CFLAGS) -c -o lib_a-sf_fdim.o `test -f 'sf_fdim.c' || echo '$(srcdir)/'`sf_fdim.c @@ -970,6 +982,10 @@ slog1p.def: s_log1p.c $(CHEW) < $(srcdir)/s_log1p.c >$@ 2>/dev/null touch stmp-def +slog2.def: s_log2.c + $(CHEW) < $(srcdir)/s_log2.c >$@ 2>/dev/null + touch stmp-def + smodf.def: s_modf.c $(CHEW) < $(srcdir)/s_modf.c >$@ 2>/dev/null touch stmp-def diff --git a/newlib/libm/common/s_log2.c b/newlib/libm/common/s_log2.c new file mode 100644 index 000000000..4683960eb --- /dev/null +++ b/newlib/libm/common/s_log2.c @@ -0,0 +1,73 @@ +/* @(#)s_log2.c 5.1 93/09/24 */ +/* Modification from s_exp10.c Yaakov Selkowitz 2009. */ + +/* + * ==================================================== + * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved. + * + * Developed at SunPro, a Sun Microsystems, Inc. business. + * Permission to use, copy, modify, and distribute this + * software is freely granted, provided that this notice + * is preserved. + * ==================================================== + */ + +/* +FUNCTION + <<log2>>, <<log2f>>---base 2 logarithm +INDEX + log2 +INDEX + log2f + +ANSI_SYNOPSIS + #include <math.h> + double log2(double <[x]>); + float log2f(float <[x]>); + +TRAD_SYNOPSIS + #include <math.h> + double log2(<[x]>); + double <[x]>; + + float log2f(<[x]>); + float <[x]>; + +DESCRIPTION + <<log2>> returns the base 2 logarithm of <[x]>. + + <<log2f>> is identical, save that it takes and returns <<float>> values. + +RETURNS + On success, <<log2>> and <<log2f>> return the calculated value. + If the result underflows, the returned value is <<0>>. If the + result overflows, the returned value is <<HUGE_VAL>>. In + either case, <<errno>> is set to <<ERANGE>>. + +PORTABILITY + <<log2>> and <<log2f>> are required by ISO/IEC 9899:1999 and the + System V Interface Definition (Issue 6). +*/ + +/* + * wrapper log2(x) + */ + +#include "fdlibm.h" +#include <errno.h> +#include <math.h> +#undef log2 + +#ifndef _DOUBLE_IS_32BITS + +#ifdef __STDC__ + double log2(double x) /* wrapper log2 */ +#else + double log2(x) /* wrapper log2 */ + double x; +#endif +{ + return (log(x) / M_LOG2_E); +} + +#endif /* defined(_DOUBLE_IS_32BITS) */ diff --git a/newlib/libm/common/sf_log2.c b/newlib/libm/common/sf_log2.c new file mode 100644 index 000000000..eb8863c9f --- /dev/null +++ b/newlib/libm/common/sf_log2.c @@ -0,0 +1,48 @@ +/* sf_log2.c -- float version of s_log2.c. + * Modification of sf_exp10.c by Yaakov Selkowitz 2009. + */ + +/* + * ==================================================== + * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved. + * + * Developed at SunPro, a Sun Microsystems, Inc. business. + * Permission to use, copy, modify, and distribute this + * software is freely granted, provided that this notice + * is preserved. + * ==================================================== + */ + +/* + * wrapper log2f(x) + */ + +#include "fdlibm.h" +#include <errno.h> +#include <math.h> +#undef log2 +#undef log2f + +#ifdef __STDC__ + float log2f(float x) /* wrapper log2f */ +#else + float log2f(x) /* wrapper log2f */ + float x; +#endif +{ + return (logf(x) / (float) M_LOG2_E); +} + +#ifdef _DOUBLE_IS_32BITS + +#ifdef __STDC__ + double log2(double x) +#else + double log2(x) + double x; +#endif +{ + return (double) log2f((float) x); +} + +#endif /* defined(_DOUBLE_IS_32BITS) */ |