root / man / man3 / HPL_setran.3 @ 1
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| 1 | 1 | equemene | .TH HPL_setran 3 "September 10, 2008" "HPL 2.0" "HPL Library Functions" |
|---|---|---|---|
| 2 | 1 | equemene | .SH NAME |
| 3 | 1 | equemene | HPL_setran \- Manage the random number generator. |
| 4 | 1 | equemene | .SH SYNOPSIS |
| 5 | 1 | equemene | \fB\&#include "hpl.h"\fR |
| 6 | 1 | equemene | |
| 7 | 1 | equemene | \fB\&void\fR |
| 8 | 1 | equemene | \fB\&HPL_setran(\fR |
| 9 | 1 | equemene | \fB\&const int\fR |
| 10 | 1 | equemene | \fI\&OPTION\fR, |
| 11 | 1 | equemene | \fB\&int *\fR |
| 12 | 1 | equemene | \fI\&IRAN\fR |
| 13 | 1 | equemene | \fB\&);\fR |
| 14 | 1 | equemene | .SH DESCRIPTION |
| 15 | 1 | equemene | \fB\&HPL_setran\fR |
| 16 | 1 | equemene | initializes the random generator with the encoding of the |
| 17 | 1 | equemene | first number X(0) in the sequence, and the constants a and c used to |
| 18 | 1 | equemene | compute the next element in the sequence: X(n+1) = a*X(n) + c. X(0), |
| 19 | 1 | equemene | a and c are stored in the static variables irand, ias and ics. When |
| 20 | 1 | equemene | OPTION is 0 (resp. 1 and 2), irand (resp. ia and ic) is set to the |
| 21 | 1 | equemene | values of the input array IRAN. When OPTION is 3, IRAN is set to the |
| 22 | 1 | equemene | current value of irand, and irand is then incremented. |
| 23 | 1 | equemene | .SH ARGUMENTS |
| 24 | 1 | equemene | .TP 8 |
| 25 | 1 | equemene | OPTION (local input) const int |
| 26 | 1 | equemene | On entry, OPTION is an integer that specifies the operations |
| 27 | 1 | equemene | to be performed on the random generator as specified above. |
| 28 | 1 | equemene | .TP 8 |
| 29 | 1 | equemene | IRAN (local input/output) int * |
| 30 | 1 | equemene | On entry, IRAN is an array of dimension 2, that contains the |
| 31 | 1 | equemene | 16-lower and 15-higher bits of a random number. |
| 32 | 1 | equemene | .SH SEE ALSO |
| 33 | 1 | equemene | .BR HPL_ladd \ (3), |
| 34 | 1 | equemene | .BR HPL_lmul \ (3), |
| 35 | 1 | equemene | .BR HPL_xjumpm \ (3), |
| 36 | 1 | equemene | .BR HPL_jumpit \ (3), |
| 37 | 1 | equemene | .BR HPL_rand \ (3). |