1DLASQ5(1)LAPACK routine (version 3.2)                                 DLASQ5(1)
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NAME

6       DLASQ5 - computes one dqds transform in ping-pong form, one version for
7       IEEE machines another for non IEEE machines
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SYNOPSIS

10       SUBROUTINE DLASQ5( I0, N0, Z, PP, TAU, DMIN, DMIN1,  DMIN2,  DN,  DNM1,
11                          DNM2, IEEE )
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13           LOGICAL        IEEE
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15           INTEGER        I0, N0, PP
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17           DOUBLE         PRECISION DMIN, DMIN1, DMIN2, DN, DNM1, DNM2, TAU
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19           DOUBLE         PRECISION Z( * )
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PURPOSE

22       DLASQ5  computes  one dqds transform in ping-pong form, one version for
23       IEEE machines another for non IEEE machines.
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ARGUMENTS

26       I0    (input) INTEGER
27             First index.
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29       N0    (input) INTEGER
30             Last index.
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32       Z     (input) DOUBLE PRECISION array, dimension ( 4*N )
33             Z holds the qd array. EMIN is stored in Z(4*N0) to avoid an extra
34             argument.
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36       PP    (input) INTEGER
37             PP=0 for ping, PP=1 for pong.
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39       TAU   (input) DOUBLE PRECISION
40             This is the shift.
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42       DMIN  (output) DOUBLE PRECISION
43             Minimum  value  of  d.   DMIN1  (output) DOUBLE PRECISION Minimum
44             value of d, excluding D( N0 ).  DMIN2 (output)  DOUBLE  PRECISION
45             Minimum value of d, excluding D( N0 ) and D( N0-1 ).
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47       DN    (output) DOUBLE PRECISION
48             d(N0), the last value of d.
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50       DNM1  (output) DOUBLE PRECISION
51             d(N0-1).
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53       DNM2  (output) DOUBLE PRECISION
54             d(N0-2).
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56       IEEE  (input) LOGICAL
57             Flag for IEEE or non IEEE arithmetic.
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61 LAPACK routine (version 3.2)    November 2008                       DLASQ5(1)