zunmbr.f.html

来自「famous linear algebra library (LAPACK) p」· HTML 代码 · 共 313 行 · 第 1/2 页
HTML
313 行
</span><span class="comment">*</span><span class="comment">     .. Executable Statements ..
</span><span class="comment">*</span><span class="comment">
</span><span class="comment">*</span><span class="comment">     Test the input arguments
</span><span class="comment">*</span><span class="comment">
</span>      INFO = 0
      APPLYQ = <a name="LSAME.144"></a><a href="lsame.f.html#LSAME.1">LSAME</a>( VECT, <span class="string">'Q'</span> )
      LEFT = <a name="LSAME.145"></a><a href="lsame.f.html#LSAME.1">LSAME</a>( SIDE, <span class="string">'L'</span> )
      NOTRAN = <a name="LSAME.146"></a><a href="lsame.f.html#LSAME.1">LSAME</a>( TRANS, <span class="string">'N'</span> )
      LQUERY = ( LWORK.EQ.-1 )
<span class="comment">*</span><span class="comment">
</span><span class="comment">*</span><span class="comment">     NQ is the order of Q or P and NW is the minimum dimension of WORK
</span><span class="comment">*</span><span class="comment">
</span>      IF( LEFT ) THEN
         NQ = M
         NW = N
      ELSE
         NQ = N
         NW = M
      END IF
      IF( M.EQ.0 .OR. N.EQ.0 ) THEN
         NW = 0
      END IF
      IF( .NOT.APPLYQ .AND. .NOT.<a name="LSAME.161"></a><a href="lsame.f.html#LSAME.1">LSAME</a>( VECT, <span class="string">'P'</span> ) ) THEN
         INFO = -1
      ELSE IF( .NOT.LEFT .AND. .NOT.<a name="LSAME.163"></a><a href="lsame.f.html#LSAME.1">LSAME</a>( SIDE, <span class="string">'R'</span> ) ) THEN
         INFO = -2
      ELSE IF( .NOT.NOTRAN .AND. .NOT.<a name="LSAME.165"></a><a href="lsame.f.html#LSAME.1">LSAME</a>( TRANS, <span class="string">'C'</span> ) ) THEN
         INFO = -3
      ELSE IF( M.LT.0 ) THEN
         INFO = -4
      ELSE IF( N.LT.0 ) THEN
         INFO = -5
      ELSE IF( K.LT.0 ) THEN
         INFO = -6
      ELSE IF( ( APPLYQ .AND. LDA.LT.MAX( 1, NQ ) ) .OR.
     $         ( .NOT.APPLYQ .AND. LDA.LT.MAX( 1, MIN( NQ, K ) ) ) )
     $          THEN
         INFO = -8
      ELSE IF( LDC.LT.MAX( 1, M ) ) THEN
         INFO = -11
      ELSE IF( LWORK.LT.MAX( 1, NW ) .AND. .NOT.LQUERY ) THEN
         INFO = -13
      END IF
<span class="comment">*</span><span class="comment">
</span>      IF( INFO.EQ.0 ) THEN
         IF( NW.GT.0 ) THEN
            IF( APPLYQ ) THEN
               IF( LEFT ) THEN
                  NB = <a name="ILAENV.187"></a><a href="hfy-index.html#ILAENV">ILAENV</a>( 1, <span class="string">'<a name="ZUNMQR.187"></a><a href="zunmqr.f.html#ZUNMQR.1">ZUNMQR</a>'</span>, SIDE // TRANS, M-1, N, M-1,
     $                 -1 )
               ELSE
                  NB = <a name="ILAENV.190"></a><a href="hfy-index.html#ILAENV">ILAENV</a>( 1, <span class="string">'<a name="ZUNMQR.190"></a><a href="zunmqr.f.html#ZUNMQR.1">ZUNMQR</a>'</span>, SIDE // TRANS, M, N-1, N-1,
     $                 -1 )
               END IF
            ELSE
               IF( LEFT ) THEN
                  NB = <a name="ILAENV.195"></a><a href="hfy-index.html#ILAENV">ILAENV</a>( 1, <span class="string">'<a name="ZUNMLQ.195"></a><a href="zunmlq.f.html#ZUNMLQ.1">ZUNMLQ</a>'</span>, SIDE // TRANS, M-1, N, M-1,
     $                 -1 )
               ELSE
                  NB = <a name="ILAENV.198"></a><a href="hfy-index.html#ILAENV">ILAENV</a>( 1, <span class="string">'<a name="ZUNMLQ.198"></a><a href="zunmlq.f.html#ZUNMLQ.1">ZUNMLQ</a>'</span>, SIDE // TRANS, M, N-1, N-1,
     $                 -1 )
               END IF
            END IF
            LWKOPT = MAX( 1, NW*NB )
         ELSE
            LWKOPT = 1
         END IF
         WORK( 1 ) = LWKOPT
      END IF
<span class="comment">*</span><span class="comment">
</span>      IF( INFO.NE.0 ) THEN
         CALL <a name="XERBLA.210"></a><a href="xerbla.f.html#XERBLA.1">XERBLA</a>( <span class="string">'<a name="ZUNMBR.210"></a><a href="zunmbr.f.html#ZUNMBR.1">ZUNMBR</a>'</span>, -INFO )
         RETURN
      ELSE IF( LQUERY ) THEN
         RETURN
      END IF
<span class="comment">*</span><span class="comment">
</span><span class="comment">*</span><span class="comment">     Quick return if possible
</span><span class="comment">*</span><span class="comment">
</span>      IF( M.EQ.0 .OR. N.EQ.0 )
     $   RETURN
<span class="comment">*</span><span class="comment">
</span>      IF( APPLYQ ) THEN
<span class="comment">*</span><span class="comment">
</span><span class="comment">*</span><span class="comment">        Apply Q
</span><span class="comment">*</span><span class="comment">
</span>         IF( NQ.GE.K ) THEN
<span class="comment">*</span><span class="comment">
</span><span class="comment">*</span><span class="comment">           Q was determined by a call to <a name="ZGEBRD.227"></a><a href="zgebrd.f.html#ZGEBRD.1">ZGEBRD</a> with nq &gt;= k
</span><span class="comment">*</span><span class="comment">
</span>            CALL <a name="ZUNMQR.229"></a><a href="zunmqr.f.html#ZUNMQR.1">ZUNMQR</a>( SIDE, TRANS, M, N, K, A, LDA, TAU, C, LDC,
     $                   WORK, LWORK, IINFO )
         ELSE IF( NQ.GT.1 ) THEN
<span class="comment">*</span><span class="comment">
</span><span class="comment">*</span><span class="comment">           Q was determined by a call to <a name="ZGEBRD.233"></a><a href="zgebrd.f.html#ZGEBRD.1">ZGEBRD</a> with nq &lt; k
</span><span class="comment">*</span><span class="comment">
</span>            IF( LEFT ) THEN
               MI = M - 1
               NI = N
               I1 = 2
               I2 = 1
            ELSE
               MI = M
               NI = N - 1
               I1 = 1
               I2 = 2
            END IF
            CALL <a name="ZUNMQR.246"></a><a href="zunmqr.f.html#ZUNMQR.1">ZUNMQR</a>( SIDE, TRANS, MI, NI, NQ-1, A( 2, 1 ), LDA, TAU,
     $                   C( I1, I2 ), LDC, WORK, LWORK, IINFO )
         END IF
      ELSE
<span class="comment">*</span><span class="comment">
</span><span class="comment">*</span><span class="comment">        Apply P
</span><span class="comment">*</span><span class="comment">
</span>         IF( NOTRAN ) THEN
            TRANST = <span class="string">'C'</span>
         ELSE
            TRANST = <span class="string">'N'</span>
         END IF
         IF( NQ.GT.K ) THEN
<span class="comment">*</span><span class="comment">
</span><span class="comment">*</span><span class="comment">           P was determined by a call to <a name="ZGEBRD.260"></a><a href="zgebrd.f.html#ZGEBRD.1">ZGEBRD</a> with nq &gt; k
</span><span class="comment">*</span><span class="comment">
</span>            CALL <a name="ZUNMLQ.262"></a><a href="zunmlq.f.html#ZUNMLQ.1">ZUNMLQ</a>( SIDE, TRANST, M, N, K, A, LDA, TAU, C, LDC,
     $                   WORK, LWORK, IINFO )
         ELSE IF( NQ.GT.1 ) THEN
<span class="comment">*</span><span class="comment">
</span><span class="comment">*</span><span class="comment">           P was determined by a call to <a name="ZGEBRD.266"></a><a href="zgebrd.f.html#ZGEBRD.1">ZGEBRD</a> with nq &lt;= k
</span><span class="comment">*</span><span class="comment">
</span>            IF( LEFT ) THEN
               MI = M - 1
               NI = N
               I1 = 2
               I2 = 1
            ELSE
               MI = M
               NI = N - 1
               I1 = 1
               I2 = 2
            END IF
            CALL <a name="ZUNMLQ.279"></a><a href="zunmlq.f.html#ZUNMLQ.1">ZUNMLQ</a>( SIDE, TRANST, MI, NI, NQ-1, A( 1, 2 ), LDA,
     $                   TAU, C( I1, I2 ), LDC, WORK, LWORK, IINFO )
         END IF
      END IF
      WORK( 1 ) = LWKOPT
      RETURN
<span class="comment">*</span><span class="comment">
</span><span class="comment">*</span><span class="comment">     End of <a name="ZUNMBR.286"></a><a href="zunmbr.f.html#ZUNMBR.1">ZUNMBR</a>
</span><span class="comment">*</span><span class="comment">
</span>      END

</pre>

 </body>
</html>
zunmbr.f.html - 源码说明

本页面展示了「famous linear algebra library (LAPACK) ports to windows」中的 zunmbr.f.html 源码文件，采用 HTML 编程语言编写，共 313 行代码。您可以在线阅读完整代码内容，也可以返回资源详情页下载完整源码包进行本地学习和开发。
虫虫下载站收录了大量与algebra相关的技术资源，包括源代码、技术文档、电路图等，是电子工程师和嵌入式开发者的专业学习平台。
⌨️ 快捷键说明

复制代码Ctrl + C
搜索代码Ctrl + F
全屏模式F11
增大字号Ctrl + =
减小字号Ctrl + -
显示快捷键?