gmp-6.2.0

[Bruce Dubbs]

New minor version.

[Bruce Dubbs]

Changes between GMP version 6.1.* and 6.2.0

BUGS FIXED

• gmp_snprintf now correctly reports an error (returns -1) when snprintf does.
• Conversion to double is now more robust even if the configuration process does not recognize the float format.
• mpz_powm could return a not completely normalised value, when the exponent was 1 and the base < 0.
• mpf_set_str could create invalid mpf_t variables for input strings with many leading zeros.

FEATURES

• New C++ functions factorial, primorial and fibonacci for mpz_class.
• Functions to detect primality now substitute the first 24 Miller-Rabin iterations with the BPSW test.
• Mini-GMP: new functions mpz_2fac_ui and mpz_mfac_uiui.
• Mini-GMP: mpz_sizeinbase, mpz_get_str, and mpz_set_str now support bases up to 62.
• Mini-GMP: added support for the mpq_t layer.
• MIPS r6 cores are now supported.

SPEEDUPS

• Major speedup for AMD Ryzen and Epyc thanks to an extensive set of assembly code.
• Major speedup for IBM POWER9 thanks to assembly code making use of new madd instruction.
• Speedup for 64-bit ARM CPUs thanks to new/improved assembly code.
• The n-over-k function mpz_bin_ui has been reimplemented for great speedups for large operands.
• Speedup for the worst case of mpz_perfect_power_p.
• Speedup for gcd for small and medium size operands.
• Speedup for really huge multiplies thanks to much larger FFT tables.

MISC

• Internal representation of the mpz_t variables now supports lazy allocation; memory is allocated only when a value is stored.
• Small improvements and better coverage for the test suite.
• The tune/speed program can measure some more functions.
• The low-level function mpn_mul no longer diverts to mpn_sqr, users should call mpn_sqr directly when applicable.
• New installed files gmp.pc and gmpxx.pc, for use with pkg-config.

[Bruce Dubbs]

Fixed at revision 11731.