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py: Allow MPZ_DIG_SIZE to be optionally configured by a port.

NotImplemented
Damien George 2015-03-28 21:45:57 +00:00
parent 567184e21e
commit 3f327cc4c6
1 changed files with 24 additions and 9 deletions
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33
py/mpz.h
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@ -39,22 +39,37 @@
// unsigned versions.
//
// MPZ_DIG_SIZE can be between 4 and 8*sizeof(mpz_dig_t), but it makes most
// sense to have it as large as possible. Below, the type is auto-detected
// depending on the machine, but it (and MPZ_DIG_SIZE) can be freely changed so
// long as the constraints mentioned above are met.
// sense to have it as large as possible. If MPZ_DIG_SIZE is not already
// defined then it is auto-detected below, depending on the machine. The types
// are then set based on the value of MPZ_DIG_SIZE (although they can be freely
// changed so long as the constraints mentioned above are met).
#if defined(__x86_64__) || defined(_WIN64)
// 64-bit machine, using 32-bit storage for digits
#ifndef MPZ_DIG_SIZE
#if defined(__x86_64__) || defined(_WIN64)
// 64-bit machine, using 32-bit storage for digits
#define MPZ_DIG_SIZE (32)
#else
// default: 32-bit machine, using 16-bit storage for digits
#define MPZ_DIG_SIZE (16)
#endif
#endif
#if MPZ_DIG_SIZE > 16
typedef uint32_t mpz_dig_t;
typedef uint64_t mpz_dbl_dig_t;
typedef int64_t mpz_dbl_dig_signed_t;
#define MPZ_DIG_SIZE (32)
#else
// 32-bit machine, using 16-bit storage for digits
#elif MPZ_DIG_SIZE > 8
typedef uint16_t mpz_dig_t;
typedef uint32_t mpz_dbl_dig_t;
typedef int32_t mpz_dbl_dig_signed_t;
#define MPZ_DIG_SIZE (16)
#elif MPZ_DIG_SIZE > 4
typedef uint8_t mpz_dig_t;
typedef uint16_t mpz_dbl_dig_t;
typedef int16_t mpz_dbl_dig_signed_t;
#else
typedef uint8_t mpz_dig_t;
typedef uint8_t mpz_dbl_dig_t;
typedef int8_t mpz_dbl_dig_signed_t;
#endif
#ifdef _WIN64