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2) _mpd_qpow_mpd(): Abort the loop for all specials, not only infinity. 3) _mpd_qpow_mpd(): Make the function more general and distinguish between zero clamping and folding down the exponent. The latter case is currently handled by setting context->clamp to 0 before calling the function. 4) _mpd_qpow_int(): Add one to the work precision in case of a negative exponent. This is to get the same relative error (0.1 * 10**-prec) for both positive and negative exponents. The previous relative error for negative exponents was (0.2 * 10**-prec). Both errors are _before_ the final rounding to the context precision. |
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| .. | ||
| libmpdec | ||
| tests | ||
| _decimal.c | ||
| docstrings.h | ||
| ISSUES.txt | ||
| README.txt | ||
About ===== _decimal.c is a wrapper for the libmpdec library. libmpdec is a fast C library for correctly-rounded arbitrary precision decimal floating point arithmetic. It is a complete implementation of Mike Cowlishaw/IBM's General Decimal Arithmetic Specification. Build process for the module ============================ As usual, the build process for _decimal.so is driven by setup.py in the top level directory. setup.py autodetects the following build configurations: 1) x64 - 64-bit Python, x86_64 processor (AMD, Intel) 2) uint128 - 64-bit Python, compiler provides __uint128_t (gcc) 3) ansi64 - 64-bit Python, ANSI C 4) ppro - 32-bit Python, x86 CPU, PentiumPro or later 5) ansi32 - 32-bit Python, ANSI C 6) ansi-legacy - 32-bit Python, compiler without uint64_t 7) universal - Mac OS only (multi-arch) It is possible to override autodetection by exporting: PYTHON_DECIMAL_WITH_MACHINE=value, where value is one of the above options. NOTE ==== decimal.so is not built from a static libmpdec.a since doing so led to failures on AIX (user report) and Windows (mixing static and dynamic CRTs causes locale problems and more).