new modules 'ilogb', 'ilogbf', 'ilogbl'

[Bruno Haible]

ilogb() is a variant of logb(). Nearly the same replacement code as for
logb().

Notable bugs fixed: The value for zero, infinite, or NaN arguments is
broken on NetBSD, OpenBSD, and old AIX 5.1.


2012-04-03  Bruno Haible  <address@hidden>

        Tests for module 'ilogbl'.
        * modules/ilogbl-tests: New file.
        * tests/test-ilogbl.c: New file.

        New module 'ilogbl'.
        * lib/math.in.h (ilogbl): New declaration.
        * lib/ilogbl.c: New file.
        * m4/ilogbl.m4: New file.
        * m4/math_h.m4 (gl_MATH_H): Test whether ilogbl is declared.
        (gl_MATH_H_DEFAULTS): Initialize GNULIB_ILOGBL, HAVE_ILOGBL.
        * modules/math (Makefile.am): Substitute GNULIB_ILOGBL, HAVE_ILOGBL.
        Split sed invocation, to avoid the limit of 100 substitutions of
        HP-UX 'sed'.
        * modules/ilogbl: New file.
        * tests/test-math-c++.cc: Check the declaration of ilogbl.
        * doc/posix-functions/ilogbl.texi: Mention the new module.

2012-04-03  Bruno Haible  <address@hidden>

        Tests for module 'ilogbf'.
        * modules/ilogbf-tests: New file.
        * tests/test-ilogbf.c: New file.

        New module 'ilogbf'.
        * lib/math.in.h (ilogbf): New declaration.
        * lib/ilogbf.c: New file.
        * m4/ilogbf.m4: New file.
        * m4/math_h.m4 (gl_MATH_H): Test whether ilogbf is declared.
        (gl_MATH_H_DEFAULTS): Initialize GNULIB_ILOGBF, HAVE_ILOGBF,
        REPLACE_ILOGBF.
        * modules/math (Makefile.am): Substitute GNULIB_ILOGBF, HAVE_ILOGBF,
        REPLACE_ILOGBF.
        * modules/ilogbf: New file.
        * tests/test-math-c++.cc: Check the declaration of ilogbf.
        * doc/posix-functions/ilogbf.texi: Mention the new module.

2012-04-03  Bruno Haible  <address@hidden>

        Tests for module 'ilogb'.
        * modules/ilogb-tests: New file.
        * tests/test-ilogb.c: New file.
        * tests/test-ilogb.h: New file, based on tests/test-logb.h and
        tests/test-logb-ieee.h.

        New module 'ilogb'.
        * lib/math.in.h (ilogb): New declaration.
        * lib/ilogb.c: New file.
        * m4/ilogb.m4: New file.
        * m4/math_h.m4 (gl_MATH_H): Test whether ilogb is declared.
        (gl_MATH_H_DEFAULTS): Initialize GNULIB_ILOGB, HAVE_ILOGB,
        REPLACE_ILOGB.
        * modules/math (Makefile.am): Substitute GNULIB_ILOGB, HAVE_ILOGB,
        REPLACE_ILOGB.
        * modules/ilogb: New file.
        * tests/test-math-c++.cc: Check the declaration of ilogb.
        * doc/posix-functions/ilogb.texi: Mention the new module.

2012-04-03  Bruno Haible  <address@hidden>

        math: Provide FP_ILOGB0 and FP_ILOGBNAN.
        * lib/math.in.h (FP_ILOGB0, FP_ILOGBNAN): Define fallback.
        * tests/test-math.c: Check that FP_ILOGB0, FP_ILOGBNAN are defined.
        (main): Check their values.
        * doc/posix-headers/math.texi: Mention the FP_ILOGB0, FP_ILOGBNAN
        problem.