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<TITLE>HPL_setran HPL 2.0 Library Functions September 10, 2008</TITLE> |
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<BODY BGCOLOR="WHITE" TEXT = "#000000" LINK = "#0000ff" VLINK = "#000099" |
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ALINK = "#ffff00"> |
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<H1>Name</H1> |
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<B>HPL_setran</B> Manage the random number generator. |
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<H1>Synopsis</H1> |
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<CODE>#include "hpl.h"</CODE><BR><BR> |
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<CODE>void</CODE> |
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<CODE>HPL_setran(</CODE> |
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<CODE>const int</CODE> |
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<CODE>OPTION</CODE>, |
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<CODE>int *</CODE> |
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<CODE>IRAN</CODE> |
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<CODE>);</CODE> |
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<H1>Description</H1> |
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<B>HPL_setran</B> |
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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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<H1>Arguments</H1> |
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<PRE>
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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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</PRE>
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<PRE>
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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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</PRE>
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<H1>See Also</H1> |
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<A HREF="HPL_ladd.html">HPL_ladd</A>, |
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<A HREF="HPL_lmul.html">HPL_lmul</A>, |
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<A HREF="HPL_xjumpm.html">HPL_xjumpm</A>, |
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<A HREF="HPL_jumpit.html">HPL_jumpit</A>, |
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<A HREF="HPL_rand.html">HPL_rand</A>. |
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