GMP 5.1 News

GMP 5.1 is upwardly source and binary compatible with 5.0, 4.x, and 3.x, except for applications that use the semi-documented mpn_bdivmod function.

Changes in GMP 5.1.3

GMP 5.1.3 release announcement

BUGS FIXED

The internal functions mpn_sbpi1_div_qr_sec mpn_sbpi1_div_r_sec could compute garbage with a low probability. They are now rewritten, and the test code has been improved.
A bug in the ia64 implementation of mpn_divrem_2, clobbering some callee-save registers, has been fixed. This is an internal function, with the bug manifesting itself as miscomputation in, e.g., mpn_sqrtrem.
The documentation now correctly says 'const' for input arguments.

SPEEDUPS

None.

FEATURES

None.

MISC

None.

Changes in GMP 5.1.2

GMP 5.1.2 release announcement

BUGS FIXED

A bug in mpz_powm_ui triggered by base arguments of at least 15000 decimal digits or mod arguments of at least 7500 decimal digits has been fixed.
An AMD Bulldozer specific bug affecting the 64-bit Windows ABI has been fixed. This bug was in a key function (mpn_mul_1) and made both Bulldozer specific builds and fat builds run on Bulldozer completely non-functional.

SPEEDUPS

None.

FEATURES

None.

MISC

Fixes and generalisations to the test suite.
Minor portability enhancements.

Changes in GMP 5.1.1

GMP 5.1.1 release announcement

BUGS FIXED

On Windows 64-bit, an error causing link errors about __gmp_binvert_limb_table has been fixed.
Aarch64 alias ARM64 support now works.
A possible buffer overrun in mpz_ior has been fixed.
A rare sign flip in mpz_remove has been fixed.
A bug causing problems with mpf numbers with absolute value ≥ 2³¹ has been fixed.
Several bugs in mini-gmp have been fixed.
A bug caused by automake, related to the 'distcheck' target, has been fixed by upgrading the automake used for GMP release engineering.

SPEEDUPS

None.

FEATURES

Preliminary support for the x32 ABI under x86-64.

MISC

The mini-gmp testsuite now tests the entire set of functions.
Various improvements of the GMP testsuite.

Changes in GMP 5.1.0

GMP 5.1.0 release announcement

BUGS FIXED

When reading a C++ number (like mpz_class) in an istream reaches the end of the stream, the eofbit is now set.
The result sign of mpz_rootrem's remainder is now always correct.
The mpz_remove function now handles negative divisors.
Contains all fixes from release 5.0.5.

SPEEDUPS

The n-factorial and n-over-k functions have been reimplemented for great speedups for small and large operands.
New subquadratic algorithm for the Kronecker/Jacobi/Legendre symbol.
Major speedup for ARM, in particular ARM Cortex-A9 and A15, thanks to broad assembly support.
Significant speedup for POWER6 and POWER7 thanks to improved assembly.
The performance under M$ Windows' 64-bit ABI has been greatly improved thanks to complete assembly support.
Minor speed improvements of many functions and for many platforms.

FEATURES

Many new CPUs recognised.
New functions for multi-factorials, and primorial: mpz_2fac_ui, mpz_mfac_uiui and mpz_primorial_ui.
The mpz_powm_sec function now uses side-channel silent division for converting into Montgomery residues.
The fat binary mechanism is now more robust in its CPU recognition.

MISC

Inclusion of assembly code is now controlled by the configure options --enable-assembly and --disable-assembly. The "none" CPU target is gone.
In C++, the conversions mpq_class->mpz_class, mpf_class->mpz_class and mpf_class->mpq_class are now explicit.
Includes "mini-gmp", a small, portable, but less efficient, implementation of a subset of GMP's mpn and mpz interfaces. Used in GMP bootstrap, but it can also be bundled with applications as a fallback when the real GMP library is unavailable.
The ABIs under AIX are no longer called aix32 and aix64, but mode64 and 32. This is more consistent with other powerpc systems.
The coverage of the testsuite has been improved, using the lcov tool. See also //gmplib.org/devel/lcov/.
It is now possible to compile GMP using a C++ compiler.
K&R C compilers are no longer supported.
The BSD MP compatibility functions have been removed.

The GMP 5.1 release would not have been possible without the very devoted work of Niels Möller and Marco Bodrato, or Marc Glisse's work on the C++ interface. As usual, Torbjörn Granlund coordinated the development and release, and did a fair amount of development work himself. Please see the GMP manual for a complete list of GMP contributors.

There is a public repository for GMP, please see the GMP repository usage instructions for more information.

Torbjörn's work on GMP is sponsored by Stiftelsen för Strategisk Forskning, through CIAM.