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| 2 | 1 | equemene | <HEAD>
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| 3 | 1 | equemene | <TITLE>HPL_setran HPL 2.0 Library Functions September 10, 2008</TITLE> |
| 4 | 1 | equemene | </HEAD>
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| 5 | 1 | equemene | |
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| 9 | 1 | equemene | <H1>Name</H1> |
| 10 | 1 | equemene | <B>HPL_setran</B> Manage the random number generator. |
| 11 | 1 | equemene | |
| 12 | 1 | equemene | <H1>Synopsis</H1> |
| 13 | 1 | equemene | <CODE>#include "hpl.h"</CODE><BR><BR> |
| 14 | 1 | equemene | <CODE>void</CODE> |
| 15 | 1 | equemene | <CODE>HPL_setran(</CODE> |
| 16 | 1 | equemene | <CODE>const int</CODE> |
| 17 | 1 | equemene | <CODE>OPTION</CODE>, |
| 18 | 1 | equemene | <CODE>int *</CODE> |
| 19 | 1 | equemene | <CODE>IRAN</CODE> |
| 20 | 1 | equemene | <CODE>);</CODE> |
| 21 | 1 | equemene | |
| 22 | 1 | equemene | <H1>Description</H1> |
| 23 | 1 | equemene | <B>HPL_setran</B> |
| 24 | 1 | equemene | initializes the random generator with the encoding of the |
| 25 | 1 | equemene | first number X(0) in the sequence, and the constants a and c used to |
| 26 | 1 | equemene | compute the next element in the sequence: X(n+1) = a*X(n) + c. X(0), |
| 27 | 1 | equemene | a and c are stored in the static variables irand, ias and ics. When |
| 28 | 1 | equemene | OPTION is 0 (resp. 1 and 2), irand (resp. ia and ic) is set to the |
| 29 | 1 | equemene | values of the input array IRAN. When OPTION is 3, IRAN is set to the |
| 30 | 1 | equemene | current value of irand, and irand is then incremented. |
| 31 | 1 | equemene | |
| 32 | 1 | equemene | <H1>Arguments</H1> |
| 33 | 1 | equemene | <PRE>
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| 34 | 1 | equemene | OPTION (local input) const int |
| 35 | 1 | equemene | On entry, OPTION is an integer that specifies the operations |
| 36 | 1 | equemene | to be performed on the random generator as specified above. |
| 37 | 1 | equemene | </PRE>
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| 38 | 1 | equemene | <PRE>
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| 39 | 1 | equemene | IRAN (local input/output) int * |
| 40 | 1 | equemene | On entry, IRAN is an array of dimension 2, that contains the |
| 41 | 1 | equemene | 16-lower and 15-higher bits of a random number. |
| 42 | 1 | equemene | </PRE>
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| 43 | 1 | equemene | |
| 44 | 1 | equemene | <H1>See Also</H1> |
| 45 | 1 | equemene | <A HREF="HPL_ladd.html">HPL_ladd</A>, |
| 46 | 1 | equemene | <A HREF="HPL_lmul.html">HPL_lmul</A>, |
| 47 | 1 | equemene | <A HREF="HPL_xjumpm.html">HPL_xjumpm</A>, |
| 48 | 1 | equemene | <A HREF="HPL_jumpit.html">HPL_jumpit</A>, |
| 49 | 1 | equemene | <A HREF="HPL_rand.html">HPL_rand</A>. |
| 50 | 1 | equemene | |
| 51 | 1 | equemene | </BODY>
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| 52 | 1 | equemene | </HTML> |