33 lines
928 B
Go
33 lines
928 B
Go
|
package dh
|
||
|
|
|
||
|
|
const (
|
||
|
|
// QSizeMinimum Specifies the number of the most significant bit (0 to M).
|
||
|
|
// WARNING: internally, usually 1 to N.
|
||
|
|
QSizeMinimum = 511
|
||
|
|
|
||
|
|
// Prime sieving constants
|
||
|
|
// Assuming 8 bit bytes and 32 bit words.
|
||
|
|
ShiftBit = 3
|
||
|
|
ShiftByte = 2
|
||
|
|
ShiftWord = ShiftBit + ShiftByte
|
||
|
|
ShiftMegabyte = 20
|
||
|
|
ShiftMegaWord = ShiftMegabyte - ShiftBit
|
||
|
|
|
||
|
|
// Memory limits.
|
||
|
|
// LargeMinimum is 8 megabytes
|
||
|
|
LargeMinimum = uint32(8) // Originally an 8UL in moduli.c
|
||
|
|
// LargeMaximum is 127MB.
|
||
|
|
LargeMaximum = uint32(127)
|
||
|
|
// The largest sieve prime has to be < 2**32 on 32-bit systems.
|
||
|
|
SmallMaximum = uint32(0xffffffff) // 4294967295
|
||
|
|
// Can sieve all primes less than 2**32, as 65537**2 > 2**32-1.
|
||
|
|
TinyNumber = uint32(1) << 16
|
||
|
|
// Ensure enough bit space for testing 2*q.
|
||
|
|
TestMaximum = uint32(1) << 16
|
||
|
|
TestMinimum = QSizeMinimum + 1 // (uint32(1) << (ShiftWord - TestPower))
|
||
|
|
TestPower = 3 // 2**n, n < ShiftWord
|
||
|
|
)
|
||
|
|
|
||
|
|
var (
|
||
|
|
)
|