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654 lines
19 KiB
654 lines
19 KiB
/* ilaenv.f -- translated by f2c (version 20061008). |
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You must link the resulting object file with libf2c: |
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on Microsoft Windows system, link with libf2c.lib; |
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on Linux or Unix systems, link with .../path/to/libf2c.a -lm |
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or, if you install libf2c.a in a standard place, with -lf2c -lm |
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-- in that order, at the end of the command line, as in |
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cc *.o -lf2c -lm |
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Source for libf2c is in /netlib/f2c/libf2c.zip, e.g., |
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|
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http://www.netlib.org/f2c/libf2c.zip |
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*/ |
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|
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#include "clapack.h" |
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|
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#include "string.h" |
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|
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/* Table of constant values */ |
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|
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static integer c__1 = 1; |
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static real c_b163 = 0.f; |
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static real c_b164 = 1.f; |
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static integer c__0 = 0; |
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integer ilaenv_(integer *ispec, char *name__, char *opts, integer *n1, |
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integer *n2, integer *n3, integer *n4) |
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{ |
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/* System generated locals */ |
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integer ret_val; |
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|
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/* Builtin functions */ |
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/* Subroutine */ int s_copy(char *, char *, ftnlen, ftnlen); |
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integer s_cmp(char *, char *, ftnlen, ftnlen); |
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|
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/* Local variables */ |
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integer i__; |
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char c1[1], c2[2], c3[3], c4[2]; |
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integer ic, nb, iz, nx; |
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logical cname; |
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integer nbmin; |
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logical sname; |
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extern integer ieeeck_(integer *, real *, real *); |
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char subnam[6]; |
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extern integer iparmq_(integer *, char *, char *, integer *, integer *, |
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integer *, integer *); |
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ftnlen name_len, opts_len; |
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name_len = (ftnlen)strlen (name__); |
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opts_len = (ftnlen)strlen (opts); |
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|
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/* -- LAPACK auxiliary routine (version 3.2) -- */ |
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/* Univ. of Tennessee, Univ. of California Berkeley and NAG Ltd.. */ |
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/* January 2007 */ |
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|
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/* .. Scalar Arguments .. */ |
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/* .. */ |
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|
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/* Purpose */ |
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/* ======= */ |
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|
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/* ILAENV is called from the LAPACK routines to choose problem-dependent */ |
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/* parameters for the local environment. See ISPEC for a description of */ |
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/* the parameters. */ |
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/* ILAENV returns an INTEGER */ |
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/* if ILAENV >= 0: ILAENV returns the value of the parameter specified by ISPEC */ |
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/* if ILAENV < 0: if ILAENV = -k, the k-th argument had an illegal value. */ |
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/* This version provides a set of parameters which should give good, */ |
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/* but not optimal, performance on many of the currently available */ |
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/* computers. Users are encouraged to modify this subroutine to set */ |
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/* the tuning parameters for their particular machine using the option */ |
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/* and problem size information in the arguments. */ |
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/* This routine will not function correctly if it is converted to all */ |
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/* lower case. Converting it to all upper case is allowed. */ |
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|
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/* Arguments */ |
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/* ========= */ |
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/* ISPEC (input) INTEGER */ |
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/* Specifies the parameter to be returned as the value of */ |
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/* ILAENV. */ |
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/* = 1: the optimal blocksize; if this value is 1, an unblocked */ |
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/* algorithm will give the best performance. */ |
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/* = 2: the minimum block size for which the block routine */ |
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/* should be used; if the usable block size is less than */ |
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/* this value, an unblocked routine should be used. */ |
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/* = 3: the crossover point (in a block routine, for N less */ |
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/* than this value, an unblocked routine should be used) */ |
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/* = 4: the number of shifts, used in the nonsymmetric */ |
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/* eigenvalue routines (DEPRECATED) */ |
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/* = 5: the minimum column dimension for blocking to be used; */ |
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/* rectangular blocks must have dimension at least k by m, */ |
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/* where k is given by ILAENV(2,...) and m by ILAENV(5,...) */ |
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/* = 6: the crossover point for the SVD (when reducing an m by n */ |
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/* matrix to bidiagonal form, if max(m,n)/min(m,n) exceeds */ |
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/* this value, a QR factorization is used first to reduce */ |
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/* the matrix to a triangular form.) */ |
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/* = 7: the number of processors */ |
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/* = 8: the crossover point for the multishift QR method */ |
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/* for nonsymmetric eigenvalue problems (DEPRECATED) */ |
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/* = 9: maximum size of the subproblems at the bottom of the */ |
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/* computation tree in the divide-and-conquer algorithm */ |
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/* (used by xGELSD and xGESDD) */ |
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/* =10: ieee NaN arithmetic can be trusted not to trap */ |
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/* =11: infinity arithmetic can be trusted not to trap */ |
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/* 12 <= ISPEC <= 16: */ |
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/* xHSEQR or one of its subroutines, */ |
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/* see IPARMQ for detailed explanation */ |
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/* NAME (input) CHARACTER*(*) */ |
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/* The name of the calling subroutine, in either upper case or */ |
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/* lower case. */ |
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/* OPTS (input) CHARACTER*(*) */ |
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/* The character options to the subroutine NAME, concatenated */ |
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/* into a single character string. For example, UPLO = 'U', */ |
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/* TRANS = 'T', and DIAG = 'N' for a triangular routine would */ |
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/* be specified as OPTS = 'UTN'. */ |
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/* N1 (input) INTEGER */ |
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/* N2 (input) INTEGER */ |
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/* N3 (input) INTEGER */ |
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/* N4 (input) INTEGER */ |
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/* Problem dimensions for the subroutine NAME; these may not all */ |
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/* be required. */ |
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/* Further Details */ |
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/* =============== */ |
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/* The following conventions have been used when calling ILAENV from the */ |
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/* LAPACK routines: */ |
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/* 1) OPTS is a concatenation of all of the character options to */ |
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/* subroutine NAME, in the same order that they appear in the */ |
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/* argument list for NAME, even if they are not used in determining */ |
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/* the value of the parameter specified by ISPEC. */ |
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/* 2) The problem dimensions N1, N2, N3, N4 are specified in the order */ |
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/* that they appear in the argument list for NAME. N1 is used */ |
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/* first, N2 second, and so on, and unused problem dimensions are */ |
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/* passed a value of -1. */ |
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/* 3) The parameter value returned by ILAENV is checked for validity in */ |
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/* the calling subroutine. For example, ILAENV is used to retrieve */ |
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/* the optimal blocksize for STRTRI as follows: */ |
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/* NB = ILAENV( 1, 'STRTRI', UPLO // DIAG, N, -1, -1, -1 ) */ |
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/* IF( NB.LE.1 ) NB = MAX( 1, N ) */ |
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/* ===================================================================== */ |
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/* .. Local Scalars .. */ |
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/* .. */ |
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/* .. Intrinsic Functions .. */ |
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/* .. */ |
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/* .. External Functions .. */ |
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/* .. */ |
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/* .. Executable Statements .. */ |
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switch (*ispec) { |
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case 1: goto L10; |
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case 2: goto L10; |
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case 3: goto L10; |
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case 4: goto L80; |
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case 5: goto L90; |
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case 6: goto L100; |
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case 7: goto L110; |
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case 8: goto L120; |
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case 9: goto L130; |
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case 10: goto L140; |
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case 11: goto L150; |
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case 12: goto L160; |
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case 13: goto L160; |
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case 14: goto L160; |
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case 15: goto L160; |
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case 16: goto L160; |
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} |
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/* Invalid value for ISPEC */ |
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ret_val = -1; |
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return ret_val; |
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L10: |
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/* Convert NAME to upper case if the first character is lower case. */ |
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ret_val = 1; |
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s_copy(subnam, name__, (ftnlen)1, name_len); |
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ic = *(unsigned char *)subnam; |
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iz = 'Z'; |
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if (iz == 90 || iz == 122) { |
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/* ASCII character set */ |
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if (ic >= 97 && ic <= 122) { |
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*(unsigned char *)subnam = (char) (ic - 32); |
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for (i__ = 2; i__ <= 6; ++i__) { |
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ic = *(unsigned char *)&subnam[i__ - 1]; |
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if (ic >= 97 && ic <= 122) { |
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*(unsigned char *)&subnam[i__ - 1] = (char) (ic - 32); |
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} |
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/* L20: */ |
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} |
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} |
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} else if (iz == 233 || iz == 169) { |
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/* EBCDIC character set */ |
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if (ic >= 129 && ic <= 137 || ic >= 145 && ic <= 153 || ic >= 162 && |
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ic <= 169) { |
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*(unsigned char *)subnam = (char) (ic + 64); |
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for (i__ = 2; i__ <= 6; ++i__) { |
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ic = *(unsigned char *)&subnam[i__ - 1]; |
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if (ic >= 129 && ic <= 137 || ic >= 145 && ic <= 153 || ic >= |
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162 && ic <= 169) { |
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*(unsigned char *)&subnam[i__ - 1] = (char) (ic + 64); |
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} |
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/* L30: */ |
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} |
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} |
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} else if (iz == 218 || iz == 250) { |
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/* Prime machines: ASCII+128 */ |
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if (ic >= 225 && ic <= 250) { |
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*(unsigned char *)subnam = (char) (ic - 32); |
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for (i__ = 2; i__ <= 6; ++i__) { |
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ic = *(unsigned char *)&subnam[i__ - 1]; |
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if (ic >= 225 && ic <= 250) { |
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*(unsigned char *)&subnam[i__ - 1] = (char) (ic - 32); |
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} |
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/* L40: */ |
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} |
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} |
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} |
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*(unsigned char *)c1 = *(unsigned char *)subnam; |
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sname = *(unsigned char *)c1 == 'S' || *(unsigned char *)c1 == 'D'; |
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cname = *(unsigned char *)c1 == 'C' || *(unsigned char *)c1 == 'Z'; |
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if (! (cname || sname)) { |
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return ret_val; |
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} |
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s_copy(c2, subnam + 1, (ftnlen)1, (ftnlen)2); |
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s_copy(c3, subnam + 3, (ftnlen)1, (ftnlen)3); |
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s_copy(c4, c3 + 1, (ftnlen)1, (ftnlen)2); |
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switch (*ispec) { |
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case 1: goto L50; |
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case 2: goto L60; |
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case 3: goto L70; |
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} |
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L50: |
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/* ISPEC = 1: block size */ |
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/* In these examples, separate code is provided for setting NB for */ |
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/* real and complex. We assume that NB will take the same value in */ |
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/* single or double precision. */ |
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nb = 1; |
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if (s_cmp(c2, "GE", (ftnlen)1, (ftnlen)2) == 0) { |
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if (s_cmp(c3, "TRF", (ftnlen)1, (ftnlen)3) == 0) { |
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if (sname) { |
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nb = 64; |
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} else { |
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nb = 64; |
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} |
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} else if (s_cmp(c3, "QRF", (ftnlen)1, (ftnlen)3) == 0 || s_cmp(c3, |
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"RQF", (ftnlen)1, (ftnlen)3) == 0 || s_cmp(c3, "LQF", (ftnlen) |
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1, (ftnlen)3) == 0 || s_cmp(c3, "QLF", (ftnlen)1, (ftnlen)3) |
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== 0) { |
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if (sname) { |
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nb = 32; |
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} else { |
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nb = 32; |
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} |
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} else if (s_cmp(c3, "HRD", (ftnlen)1, (ftnlen)3) == 0) { |
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if (sname) { |
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nb = 32; |
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} else { |
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nb = 32; |
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} |
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} else if (s_cmp(c3, "BRD", (ftnlen)1, (ftnlen)3) == 0) { |
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if (sname) { |
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nb = 32; |
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} else { |
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nb = 32; |
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} |
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} else if (s_cmp(c3, "TRI", (ftnlen)1, (ftnlen)3) == 0) { |
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if (sname) { |
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nb = 64; |
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} else { |
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nb = 64; |
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} |
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} |
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} else if (s_cmp(c2, "PO", (ftnlen)1, (ftnlen)2) == 0) { |
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if (s_cmp(c3, "TRF", (ftnlen)1, (ftnlen)3) == 0) { |
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if (sname) { |
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nb = 64; |
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} else { |
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nb = 64; |
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} |
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} |
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} else if (s_cmp(c2, "SY", (ftnlen)1, (ftnlen)2) == 0) { |
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if (s_cmp(c3, "TRF", (ftnlen)1, (ftnlen)3) == 0) { |
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if (sname) { |
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nb = 64; |
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} else { |
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nb = 64; |
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} |
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} else if (sname && s_cmp(c3, "TRD", (ftnlen)1, (ftnlen)3) == 0) { |
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nb = 32; |
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} else if (sname && s_cmp(c3, "GST", (ftnlen)1, (ftnlen)3) == 0) { |
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nb = 64; |
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} |
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} else if (cname && s_cmp(c2, "HE", (ftnlen)1, (ftnlen)2) == 0) { |
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if (s_cmp(c3, "TRF", (ftnlen)1, (ftnlen)3) == 0) { |
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nb = 64; |
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} else if (s_cmp(c3, "TRD", (ftnlen)1, (ftnlen)3) == 0) { |
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nb = 32; |
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} else if (s_cmp(c3, "GST", (ftnlen)1, (ftnlen)3) == 0) { |
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nb = 64; |
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} |
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} else if (sname && s_cmp(c2, "OR", (ftnlen)1, (ftnlen)2) == 0) { |
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if (*(unsigned char *)c3 == 'G') { |
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if (s_cmp(c4, "QR", (ftnlen)1, (ftnlen)2) == 0 || s_cmp(c4, "RQ", |
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(ftnlen)1, (ftnlen)2) == 0 || s_cmp(c4, "LQ", (ftnlen)1, ( |
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ftnlen)2) == 0 || s_cmp(c4, "QL", (ftnlen)1, (ftnlen)2) == |
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0 || s_cmp(c4, "HR", (ftnlen)1, (ftnlen)2) == 0 || s_cmp( |
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c4, "TR", (ftnlen)1, (ftnlen)2) == 0 || s_cmp(c4, "BR", ( |
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ftnlen)1, (ftnlen)2) == 0) { |
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nb = 32; |
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} |
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} else if (*(unsigned char *)c3 == 'M') { |
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if (s_cmp(c4, "QR", (ftnlen)1, (ftnlen)2) == 0 || s_cmp(c4, "RQ", |
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(ftnlen)1, (ftnlen)2) == 0 || s_cmp(c4, "LQ", (ftnlen)1, ( |
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ftnlen)2) == 0 || s_cmp(c4, "QL", (ftnlen)1, (ftnlen)2) == |
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0 || s_cmp(c4, "HR", (ftnlen)1, (ftnlen)2) == 0 || s_cmp( |
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c4, "TR", (ftnlen)1, (ftnlen)2) == 0 || s_cmp(c4, "BR", ( |
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ftnlen)1, (ftnlen)2) == 0) { |
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nb = 32; |
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} |
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} |
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} else if (cname && s_cmp(c2, "UN", (ftnlen)1, (ftnlen)2) == 0) { |
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if (*(unsigned char *)c3 == 'G') { |
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if (s_cmp(c4, "QR", (ftnlen)1, (ftnlen)2) == 0 || s_cmp(c4, "RQ", |
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(ftnlen)1, (ftnlen)2) == 0 || s_cmp(c4, "LQ", (ftnlen)1, ( |
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ftnlen)2) == 0 || s_cmp(c4, "QL", (ftnlen)1, (ftnlen)2) == |
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0 || s_cmp(c4, "HR", (ftnlen)1, (ftnlen)2) == 0 || s_cmp( |
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c4, "TR", (ftnlen)1, (ftnlen)2) == 0 || s_cmp(c4, "BR", ( |
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ftnlen)1, (ftnlen)2) == 0) { |
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nb = 32; |
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} |
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} else if (*(unsigned char *)c3 == 'M') { |
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if (s_cmp(c4, "QR", (ftnlen)1, (ftnlen)2) == 0 || s_cmp(c4, "RQ", |
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(ftnlen)1, (ftnlen)2) == 0 || s_cmp(c4, "LQ", (ftnlen)1, ( |
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ftnlen)2) == 0 || s_cmp(c4, "QL", (ftnlen)1, (ftnlen)2) == |
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0 || s_cmp(c4, "HR", (ftnlen)1, (ftnlen)2) == 0 || s_cmp( |
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c4, "TR", (ftnlen)1, (ftnlen)2) == 0 || s_cmp(c4, "BR", ( |
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ftnlen)1, (ftnlen)2) == 0) { |
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nb = 32; |
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} |
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} |
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} else if (s_cmp(c2, "GB", (ftnlen)1, (ftnlen)2) == 0) { |
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if (s_cmp(c3, "TRF", (ftnlen)1, (ftnlen)3) == 0) { |
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if (sname) { |
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if (*n4 <= 64) { |
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nb = 1; |
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} else { |
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nb = 32; |
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} |
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} else { |
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if (*n4 <= 64) { |
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nb = 1; |
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} else { |
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nb = 32; |
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} |
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} |
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} |
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} else if (s_cmp(c2, "PB", (ftnlen)1, (ftnlen)2) == 0) { |
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if (s_cmp(c3, "TRF", (ftnlen)1, (ftnlen)3) == 0) { |
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if (sname) { |
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if (*n2 <= 64) { |
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nb = 1; |
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} else { |
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nb = 32; |
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} |
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} else { |
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if (*n2 <= 64) { |
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nb = 1; |
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} else { |
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nb = 32; |
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} |
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} |
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} |
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} else if (s_cmp(c2, "TR", (ftnlen)1, (ftnlen)2) == 0) { |
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if (s_cmp(c3, "TRI", (ftnlen)1, (ftnlen)3) == 0) { |
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if (sname) { |
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nb = 64; |
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} else { |
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nb = 64; |
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} |
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} |
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} else if (s_cmp(c2, "LA", (ftnlen)1, (ftnlen)2) == 0) { |
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if (s_cmp(c3, "UUM", (ftnlen)1, (ftnlen)3) == 0) { |
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if (sname) { |
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nb = 64; |
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} else { |
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nb = 64; |
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} |
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} |
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} else if (sname && s_cmp(c2, "ST", (ftnlen)1, (ftnlen)2) == 0) { |
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if (s_cmp(c3, "EBZ", (ftnlen)1, (ftnlen)3) == 0) { |
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nb = 1; |
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} |
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} |
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ret_val = nb; |
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return ret_val; |
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|
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L60: |
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|
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/* ISPEC = 2: minimum block size */ |
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|
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nbmin = 2; |
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if (s_cmp(c2, "GE", (ftnlen)1, (ftnlen)2) == 0) { |
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if (s_cmp(c3, "QRF", (ftnlen)1, (ftnlen)3) == 0 || s_cmp(c3, "RQF", ( |
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ftnlen)1, (ftnlen)3) == 0 || s_cmp(c3, "LQF", (ftnlen)1, ( |
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ftnlen)3) == 0 || s_cmp(c3, "QLF", (ftnlen)1, (ftnlen)3) == 0) |
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{ |
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if (sname) { |
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nbmin = 2; |
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} else { |
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nbmin = 2; |
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} |
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} else if (s_cmp(c3, "HRD", (ftnlen)1, (ftnlen)3) == 0) { |
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if (sname) { |
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nbmin = 2; |
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} else { |
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nbmin = 2; |
|
} |
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} else if (s_cmp(c3, "BRD", (ftnlen)1, (ftnlen)3) == 0) { |
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if (sname) { |
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nbmin = 2; |
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} else { |
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nbmin = 2; |
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} |
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} else if (s_cmp(c3, "TRI", (ftnlen)1, (ftnlen)3) == 0) { |
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if (sname) { |
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nbmin = 2; |
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} else { |
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nbmin = 2; |
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} |
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} |
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} else if (s_cmp(c2, "SY", (ftnlen)1, (ftnlen)2) == 0) { |
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if (s_cmp(c3, "TRF", (ftnlen)1, (ftnlen)3) == 0) { |
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if (sname) { |
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nbmin = 8; |
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} else { |
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nbmin = 8; |
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} |
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} else if (sname && s_cmp(c3, "TRD", (ftnlen)1, (ftnlen)3) == 0) { |
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nbmin = 2; |
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} |
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} else if (cname && s_cmp(c2, "HE", (ftnlen)1, (ftnlen)2) == 0) { |
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if (s_cmp(c3, "TRD", (ftnlen)1, (ftnlen)3) == 0) { |
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nbmin = 2; |
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} |
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} else if (sname && s_cmp(c2, "OR", (ftnlen)1, (ftnlen)2) == 0) { |
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if (*(unsigned char *)c3 == 'G') { |
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if (s_cmp(c4, "QR", (ftnlen)1, (ftnlen)2) == 0 || s_cmp(c4, "RQ", |
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(ftnlen)1, (ftnlen)2) == 0 || s_cmp(c4, "LQ", (ftnlen)1, ( |
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ftnlen)2) == 0 || s_cmp(c4, "QL", (ftnlen)1, (ftnlen)2) == |
|
0 || s_cmp(c4, "HR", (ftnlen)1, (ftnlen)2) == 0 || s_cmp( |
|
c4, "TR", (ftnlen)1, (ftnlen)2) == 0 || s_cmp(c4, "BR", ( |
|
ftnlen)1, (ftnlen)2) == 0) { |
|
nbmin = 2; |
|
} |
|
} else if (*(unsigned char *)c3 == 'M') { |
|
if (s_cmp(c4, "QR", (ftnlen)1, (ftnlen)2) == 0 || s_cmp(c4, "RQ", |
|
(ftnlen)1, (ftnlen)2) == 0 || s_cmp(c4, "LQ", (ftnlen)1, ( |
|
ftnlen)2) == 0 || s_cmp(c4, "QL", (ftnlen)1, (ftnlen)2) == |
|
0 || s_cmp(c4, "HR", (ftnlen)1, (ftnlen)2) == 0 || s_cmp( |
|
c4, "TR", (ftnlen)1, (ftnlen)2) == 0 || s_cmp(c4, "BR", ( |
|
ftnlen)1, (ftnlen)2) == 0) { |
|
nbmin = 2; |
|
} |
|
} |
|
} else if (cname && s_cmp(c2, "UN", (ftnlen)1, (ftnlen)2) == 0) { |
|
if (*(unsigned char *)c3 == 'G') { |
|
if (s_cmp(c4, "QR", (ftnlen)1, (ftnlen)2) == 0 || s_cmp(c4, "RQ", |
|
(ftnlen)1, (ftnlen)2) == 0 || s_cmp(c4, "LQ", (ftnlen)1, ( |
|
ftnlen)2) == 0 || s_cmp(c4, "QL", (ftnlen)1, (ftnlen)2) == |
|
0 || s_cmp(c4, "HR", (ftnlen)1, (ftnlen)2) == 0 || s_cmp( |
|
c4, "TR", (ftnlen)1, (ftnlen)2) == 0 || s_cmp(c4, "BR", ( |
|
ftnlen)1, (ftnlen)2) == 0) { |
|
nbmin = 2; |
|
} |
|
} else if (*(unsigned char *)c3 == 'M') { |
|
if (s_cmp(c4, "QR", (ftnlen)1, (ftnlen)2) == 0 || s_cmp(c4, "RQ", |
|
(ftnlen)1, (ftnlen)2) == 0 || s_cmp(c4, "LQ", (ftnlen)1, ( |
|
ftnlen)2) == 0 || s_cmp(c4, "QL", (ftnlen)1, (ftnlen)2) == |
|
0 || s_cmp(c4, "HR", (ftnlen)1, (ftnlen)2) == 0 || s_cmp( |
|
c4, "TR", (ftnlen)1, (ftnlen)2) == 0 || s_cmp(c4, "BR", ( |
|
ftnlen)1, (ftnlen)2) == 0) { |
|
nbmin = 2; |
|
} |
|
} |
|
} |
|
ret_val = nbmin; |
|
return ret_val; |
|
|
|
L70: |
|
|
|
/* ISPEC = 3: crossover point */ |
|
|
|
nx = 0; |
|
if (s_cmp(c2, "GE", (ftnlen)1, (ftnlen)2) == 0) { |
|
if (s_cmp(c3, "QRF", (ftnlen)1, (ftnlen)3) == 0 || s_cmp(c3, "RQF", ( |
|
ftnlen)1, (ftnlen)3) == 0 || s_cmp(c3, "LQF", (ftnlen)1, ( |
|
ftnlen)3) == 0 || s_cmp(c3, "QLF", (ftnlen)1, (ftnlen)3) == 0) |
|
{ |
|
if (sname) { |
|
nx = 128; |
|
} else { |
|
nx = 128; |
|
} |
|
} else if (s_cmp(c3, "HRD", (ftnlen)1, (ftnlen)3) == 0) { |
|
if (sname) { |
|
nx = 128; |
|
} else { |
|
nx = 128; |
|
} |
|
} else if (s_cmp(c3, "BRD", (ftnlen)1, (ftnlen)3) == 0) { |
|
if (sname) { |
|
nx = 128; |
|
} else { |
|
nx = 128; |
|
} |
|
} |
|
} else if (s_cmp(c2, "SY", (ftnlen)1, (ftnlen)2) == 0) { |
|
if (sname && s_cmp(c3, "TRD", (ftnlen)1, (ftnlen)3) == 0) { |
|
nx = 32; |
|
} |
|
} else if (cname && s_cmp(c2, "HE", (ftnlen)1, (ftnlen)2) == 0) { |
|
if (s_cmp(c3, "TRD", (ftnlen)1, (ftnlen)3) == 0) { |
|
nx = 32; |
|
} |
|
} else if (sname && s_cmp(c2, "OR", (ftnlen)1, (ftnlen)2) == 0) { |
|
if (*(unsigned char *)c3 == 'G') { |
|
if (s_cmp(c4, "QR", (ftnlen)1, (ftnlen)2) == 0 || s_cmp(c4, "RQ", |
|
(ftnlen)1, (ftnlen)2) == 0 || s_cmp(c4, "LQ", (ftnlen)1, ( |
|
ftnlen)2) == 0 || s_cmp(c4, "QL", (ftnlen)1, (ftnlen)2) == |
|
0 || s_cmp(c4, "HR", (ftnlen)1, (ftnlen)2) == 0 || s_cmp( |
|
c4, "TR", (ftnlen)1, (ftnlen)2) == 0 || s_cmp(c4, "BR", ( |
|
ftnlen)1, (ftnlen)2) == 0) { |
|
nx = 128; |
|
} |
|
} |
|
} else if (cname && s_cmp(c2, "UN", (ftnlen)1, (ftnlen)2) == 0) { |
|
if (*(unsigned char *)c3 == 'G') { |
|
if (s_cmp(c4, "QR", (ftnlen)1, (ftnlen)2) == 0 || s_cmp(c4, "RQ", |
|
(ftnlen)1, (ftnlen)2) == 0 || s_cmp(c4, "LQ", (ftnlen)1, ( |
|
ftnlen)2) == 0 || s_cmp(c4, "QL", (ftnlen)1, (ftnlen)2) == |
|
0 || s_cmp(c4, "HR", (ftnlen)1, (ftnlen)2) == 0 || s_cmp( |
|
c4, "TR", (ftnlen)1, (ftnlen)2) == 0 || s_cmp(c4, "BR", ( |
|
ftnlen)1, (ftnlen)2) == 0) { |
|
nx = 128; |
|
} |
|
} |
|
} |
|
ret_val = nx; |
|
return ret_val; |
|
|
|
L80: |
|
|
|
/* ISPEC = 4: number of shifts (used by xHSEQR) */ |
|
|
|
ret_val = 6; |
|
return ret_val; |
|
|
|
L90: |
|
|
|
/* ISPEC = 5: minimum column dimension (not used) */ |
|
|
|
ret_val = 2; |
|
return ret_val; |
|
|
|
L100: |
|
|
|
/* ISPEC = 6: crossover point for SVD (used by xGELSS and xGESVD) */ |
|
|
|
ret_val = (integer) ((real) min(*n1,*n2) * 1.6f); |
|
return ret_val; |
|
|
|
L110: |
|
|
|
/* ISPEC = 7: number of processors (not used) */ |
|
|
|
ret_val = 1; |
|
return ret_val; |
|
|
|
L120: |
|
|
|
/* ISPEC = 8: crossover point for multishift (used by xHSEQR) */ |
|
|
|
ret_val = 50; |
|
return ret_val; |
|
|
|
L130: |
|
|
|
/* ISPEC = 9: maximum size of the subproblems at the bottom of the */ |
|
/* computation tree in the divide-and-conquer algorithm */ |
|
/* (used by xGELSD and xGESDD) */ |
|
|
|
ret_val = 25; |
|
return ret_val; |
|
|
|
L140: |
|
|
|
/* ISPEC = 10: ieee NaN arithmetic can be trusted not to trap */ |
|
|
|
/* ILAENV = 0 */ |
|
ret_val = 1; |
|
if (ret_val == 1) { |
|
ret_val = ieeeck_(&c__1, &c_b163, &c_b164); |
|
} |
|
return ret_val; |
|
|
|
L150: |
|
|
|
/* ISPEC = 11: infinity arithmetic can be trusted not to trap */ |
|
|
|
/* ILAENV = 0 */ |
|
ret_val = 1; |
|
if (ret_val == 1) { |
|
ret_val = ieeeck_(&c__0, &c_b163, &c_b164); |
|
} |
|
return ret_val; |
|
|
|
L160: |
|
|
|
/* 12 <= ISPEC <= 16: xHSEQR or one of its subroutines. */ |
|
|
|
ret_val = iparmq_(ispec, name__, opts, n1, n2, n3, n4) |
|
; |
|
return ret_val; |
|
|
|
/* End of ILAENV */ |
|
|
|
} /* ilaenv_ */
|
|
|