NEWS - master - niceSOFT/mpc

NEWS
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Andreas Enge
NEWS: Add back entries for release 1.4.0.
04 май 2026, 15:47
04 май 2026, 15:47b8c9093
Changes in version 1.4.1, released in April 2026:
  - Bug fix: mpc_fr_div: Fix memory leak introduced in release 1.4.0.

Changes in version 1.4.0 ("Jasminum grandiflorum"), released in March 2026:
  - New functions: mpc_exp10, mpc_exp2, mpc_log2
  - Bug fixes:
    - mpc_tan and mpc_tanh:
      Fix wrong values and slowness for large imaginary part.
    - mpc_pow: Agree on and implement the sign of the imaginary part when
      both inputs are real.
    - mpc_fr_div and mpc_ui_div: Treat the imaginary part of the dividend
      as an exact zero and not as +0, following the C2Y draft of the C
      standard. This changes the signs of zeroes in some results.
  - Generate the pkg-config file mpc.pc.
  - Add support for non-standard complex types (_Dcomplex, _Lcomplex) under
    Windows.

Changes in version 1.3.1, released in December 2022:
  - Bug fix: It is again possible to include mpc.h without including
    stdio.h.

Changes in version 1.3.0 ("Ipomoea batatas"), released in December 2022:
  - New function: mpc_agm
  - New rounding modes "away from zero", indicated by the letter "A" and
    corresponding to MPFR_RNDA on the designated real or imaginary part.
  - New experimental ball arithmetic.
  - New experimental function: mpc_eta_fund
  - Bug fixes:
    - mpc_asin for asin(z) with small |Re(z)| and tiny |Im(z)|
    - mpc_pow_fr: sign of zero part of result when the base has up to sign
      the same real and imaginary part, and the exponent is an even
      positive integer
    - mpc_fma: the returned 'int' value was incorrect in some cases (indicating
      whether the rounded real/imaginary parts were smaller/equal/greater
      than the exact values), but the computed complex value was correct.
  - Remove the unmaintained Makefile.vc; build files for Visual Studio
    can be found at https://github.com/BrianGladman/mpc .

Changes in version 1.2.1, released in October 2020:
  - Bug fixes:
    - Fix an incompatibility problem with GMP 6.0 and before.
    - Fix an intermediate overflow in asin.

Changes in version 1.2.0 ("Hyacinthus orientalis"), released in August 2020:
  - Minimally required library version: MPFR 4.1.0
  - New functions: mpc_sum, mpc_dot
  - Several functions are more robust with a reduced exponent range
    (for example corresponding to IEEE 754 binary formats)
  - New tool mpcheck.

Changes in version 1.1.0 ("Gladiolus palustris"), released in January 2018:
  - Minimally required library versions: GMP 5.0.0 and MPFR 3.0.0
  - Fixed issues with MPFR 4.0.0
  - New functions: mpc_cmp_abs, mpc_rootofunity
  - Improved speed for corner cases of mpc_asin, mpc_sin, see
    https://sympa.inria.fr/sympa/arc/mpc-discuss/2013-12/msg00001.html
  - Rewrite of the testing framework
  - New mpcbench tool, used with "make bench"
  - Fixed handling of over- and underflows with directed rounding in the
    "other direction" for mpc_cos, mpc_sin, mpc_exp and mpc_pow, see
    https://sympa.inria.fr/sympa/arc/mpc-discuss/2015-03/msg00003.html
  - Fixed a bug in mpc_atan(0,y) with |y| near 1, see
    https://sympa.inria.fr/sympa/arc/mpc-discuss/2017-03/msg00000.html

Changes in version 1.0.3, released in February 2015:
  - Fixed mpc_pow, see
    https://sympa.inria.fr/sympa/arc/mpc-discuss/2014-10/msg00005.html
  - #18257: Switched to libtool 2.4.5.

Changes in version 1.0.2, released in January 2014:
  - Fixed mpc_atan, mpc_atanh for (+-0, +-1), see
    http://gcc.gnu.org/bugzilla/show_bug.cgi?id=57994#c7
  - Fixed mpc_log10 for purely imaginary argument, see
    https://sympa.inria.fr/sympa/arc/mpc-discuss/2012-09/msg00001.html

Changes in version 1.0.1, released in September 2012:
  - Switched to automake 1.11.6, see
    https://lists.gnu.org/archive/html/automake/2012-07/msg00023.html
  - #14669: Fixed extraction of CC from gmp.h
  - Fixed case of intermediate zero real or imaginary part in mpc_fma,
    found by hydra with GMP_CHECK_RANDOMIZE=1346362345

Changes in version 1.0 ("Fagus silvatica"), released in July 2012:
  - First release as a GNU package
  - License change: LGPLv3+ for code, GFDLv1.3+ (with no invariant sections)
    for documentation
  - 100% of all lines are covered by tests
  - Functions renamed:
    mpc_mul_2exp to mpc_mul_2ui, mpc_div_2exp to mpc_div_2ui
  - 0^0, which returned (NaN,NaN) previously, now returns (1,+0)
  - Removed compatibility with K&R compilers, untestable due to lack of
    such compilers
  - New functions: mpc_log10, mpc_mul_2si, mpc_div_2si
  - Speed-ups:
    - mpc_fma
  - Bug fixes:
    - mpc_div and mpc_norm now return a value indicating the effective
      rounding direction, as the other functions
    - mpc_mul, mpc_sqr and mpc_norm now return correct results even if there
      are over- or underflows during the computation
    - mpc_asin, mpc_proj, mpc_sqr: Wrong result when input variable has
      infinite part and equals output variable is corrected
    - mpc_fr_sub: Wrong return value for imaginary part is corrected

Changes in version 0.9 ("Epilobium montanum"), released in February 2011:
  - New functions:
    - mpc_set_dc, mpc_set_ldc, mpc_get_dc, mpc_get_ldc for converting
      between mpc type variables and C variables of type double complex
      or long double complex
    - mpc_sin_cos, computing simultaneously the sine and cosine
  - Speed-ups:
    - mpc_pow_si through binary exponentiation
    - mpc_pow_z when the exponent fits in a long
    - mpc_tan through the use of mpc_sin_cos
  - Bug fixes:
    - trigonometric functions: infinite loop due to overflow for large
      arguments
    - mpc_exp: close to infinite loop for argument close to 0
    - mpc_sqrt: close to infinite loop for argument close to 1
    - mpc_add_si: replaced macro by function, since the macro evaluated the
      same expression twice
  - Logging feature for debugging:
      ./configure --enable-logging
      #include "mpc-log.h" instead of #include "mpc.h"
  - Minimally required library versions: gmp 4.3.2, mpfr 2.4.2

Changes in version 0.8.2, released in May 2010:
  - Speed-up of mpc_pow_ui through binary exponentiation

Changes in version 0.8.1, released in December 2009:
  - Bug fixes:
    - mpc_acosh, mpc_asinh, mpc_atanh: swap of precisions between real and
      imaginary parts
    - mpc_atan: memory leak
    - mpc_log: wrong ternary value in data file; masked by bug in mpfr-2.4.1

Changes in version 0.8 ("Dianthus deltoides"), released in November 2009:
  - New functions:
    - mpc_asin, mpc_acos, mpc_atan, mpc_asinh, mpc_acosh, mpc_atanh,
      mpc_pow_d, mpc_pow_ld, mpc_pow_si, mpc_pow_ui, mpc_pow_z, mpc_pow_fr
  - Bug fixes:
    - mpc_ui_div: real divisor

Changes in version 0.7 ("Campanula uniflora"), released in September 2009:
  - New functions: mpc_pow, mpc_set_nan, mpc_swap
  - Bug fixes:
    - mpc_log: along branch cut
    - mpc_norm: infinite loop in case of overflow
    - mpc_ui_div, mpc_div, mpc_fr_div: handling of division by 0 and
      infinities following the example code of the C99 standard
    - compilation with g++
  - Makefile.vc updated (thanks to Mickael Gastineau)
  - Minimal gmp version is 4.2
  - Changed MPC_SET_X_Y macro
  - Functions mpc_random and mpc_random2 removed

Changes in version 0.6 ("Bellis perennis"), released in April 2009:
  - New functions: mpc_get_str, mpc_set_str, mpc_strtoc, mpc_set_uj,
    mpc_set_sj, mpc_set_ld, mpc_set_ld_ld, mpc_set_si_si, mpc_set_uj_uj,
    mpc_set_sj_sj, mpc_set_f, mpc_set_f_f, mpc_set_q, mpc_set_q_q, mpc_set_z,
    mpc_set_z_z and mpc_free_str
  - New macro: MPC_SET_X_Y
  - mpc_set_ui_fr removed
  - Default precision removed, as well as mpc_init and all mpc_init_set*
    combinations; use mpc_init2 or mpc_init3, followed by mpc_set, instead
  - mpc_exp, mpc_log, mpc_cos, mpc_sin, mpc_tan, mpc_cosh, mpc_sinh,
    mpc_tanh and mpc_sqrt return inexact value
  - inp_str returns inexact value and the number of read characters
    in an additional parameter
  - Get default $CC and $CFLAGS from gmp.h (__GMP_CC / __GMP_CFLAGS,
    which are available as of GMP 4.2.3)
  - Bug fixes:
    - mpc_get_version and MPC_VERSION_STRING agree
    - Compilation on i686-pc-cygwin and i686-pc-mingw32 fixed

Changes in version 0.5.2, released in December 2008:
  - New macros:
    - version number: MPC_VERSION_NUM, MPC_VERSION
  - Makefile.vc updated (thanks to Mickael Gastineau)
  - Compilation on Debian-Gnu-Linux-PowerPC and MacOsX
    fixed (thanks to Laurent Fousse and Mickael Gastineau)

Changes in version 0.5.1, released in November 2008:
  - New functions:
    - mpc_set_fr_fr
    - mpc_real, mpc_imag
    - mpc_arg, mpc_proj
  - New macros:
    - version number: MPC_VERSION_MAJOR, MPC_VERSION_MINOR,
      MPC_VERSION_PATCHLEVEL, MPC_VERSION_STRING
    - references to number parts: mpc_realref and mpc_imagref
  - Test framework rewritten
  - Configure checks for recent gmp (>= 4.2) and mpfr (>= 2.3.1)
    libraries
  - New configure options: --with-gmp-lib, --with-gmp-include,
     --with-mpfr-lib, and --with-mpfr-include
  - Export declarations for MSWindows, makefile.vc updated (thanks to
    Mickael Gastineau)
  - Optimisations:
    - cmp_mul_fr, cmp_sin, cmp_cos
  - Bug fixes:
    - configure looks for gmp first, then for mpfr
    - mpc_cos, mpc_div, mpc_div_fr, mpc_fr_sub, mpc_mul_fr, mpc_set_fr,
      mpc_sqr
    - fix handling of special values: mpc_exp, mpc_log, mpc_mul, mpc_norm,
      mpc_sqr, mpc_sqrt

Changes in version 0.5 ("Aconitum neomontanum"), released in September 2008:
  - Support for autotools
  - New functions:
     - logarithm
     - trigonometric functions: mpc_cos, mpc_tan
     - hyperbolic functions: mpc_cosh, mpc_sinh, mpc_tanh
  - Bug fixes:
    - mpc_sqrt with directed rounding


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