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