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Issue 7652: Merge C version of decimal into py3k.
Patch Set: Created 7 years, 8 months ago
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1
2
3 About
4 =====
5
6 _decimal.c is a wrapper for the libmpdec library. libmpdec is a fast C
7 library for correctly-rounded arbitrary precision decimal floating point
8 arithmetic. It is a complete implementation of Mike Cowlishaw/IBM's
9 General Decimal Arithmetic Specification.
10
11
12 Build process for the module
13 ============================
14
15 As usual, the build process for decimal.so is driven by setup.py in the top
16 level directory. setup.py autodetects the following build configurations:
17
18 1) x64 - 64-bit Python, x86_64 processor (AMD, Intel)
19
20 2) uint128 - 64-bit Python, compiler provides __uint128_t (gcc)
21
22 3) ansi64 - 64-bit Python, ANSI C
23
24 4) ppro - 32-bit Python, x86 CPU, PentiumPro or later
25
26 5) ansi32 - 32-bit Python, ANSI C
27
28 6) ansi-legacy - 32-bit Python, compiler without uint64_t
29
30 7) universal - Mac OS only (multi-arch)
31
32
33 It is possible to override autodetection by exporting:
34
35 PYTHON_DECIMAL_WITH_MACHINE=value, where value is one of the above options.
36
37
38 NOTE
39 ====
40
41 decimal.so is not built from a static libmpdec.a since doing so led to
42 failures on AIX (user report) and Windows (mixing static and dynamic CRTs
43 causes locale problems and more).
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