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annotate libcruft/blas/sgemm.f @ 5103:e2ed74b9bfa0 after-gnuplot-split

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[project @ 2004-12-28 02:43:01 by jwe]
author jwe
date Tue, 28 Dec 2004 02:43:01 +0000
parents 024ef171aec3
children 82be108cc558
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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1 SUBROUTINE SGEMM ( TRANSA, TRANSB, M, N, K, ALPHA, A, LDA, B, LDB,
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2 $ BETA, C, LDC )
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3 * .. Scalar Arguments ..
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4 CHARACTER*1 TRANSA, TRANSB
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5 INTEGER M, N, K, LDA, LDB, LDC
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6 REAL ALPHA, BETA
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7 * .. Array Arguments ..
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8 REAL A( LDA, * ), B( LDB, * ), C( LDC, * )
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9 * ..
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10 *
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11 * Purpose
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12 * =======
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13 *
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14 * SGEMM performs one of the matrix-matrix operations
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15 *
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16 * C := alpha*op( A )*op( B ) + beta*C,
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17 *
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18 * where op( X ) is one of
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19 *
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20 * op( X ) = X or op( X ) = X',
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21 *
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22 * alpha and beta are scalars, and A, B and C are matrices, with op( A )
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23 * an m by k matrix, op( B ) a k by n matrix and C an m by n matrix.
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24 *
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25 * Parameters
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26 * ==========
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27 *
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28 * TRANSA - CHARACTER*1.
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29 * On entry, TRANSA specifies the form of op( A ) to be used in
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30 * the matrix multiplication as follows:
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31 *
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32 * TRANSA = 'N' or 'n', op( A ) = A.
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33 *
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34 * TRANSA = 'T' or 't', op( A ) = A'.
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35 *
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36 * TRANSA = 'C' or 'c', op( A ) = A'.
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37 *
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38 * Unchanged on exit.
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39 *
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40 * TRANSB - CHARACTER*1.
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41 * On entry, TRANSB specifies the form of op( B ) to be used in
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42 * the matrix multiplication as follows:
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43 *
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44 * TRANSB = 'N' or 'n', op( B ) = B.
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45 *
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46 * TRANSB = 'T' or 't', op( B ) = B'.
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47 *
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48 * TRANSB = 'C' or 'c', op( B ) = B'.
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49 *
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50 * Unchanged on exit.
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51 *
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52 * M - INTEGER.
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53 * On entry, M specifies the number of rows of the matrix
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54 * op( A ) and of the matrix C. M must be at least zero.
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55 * Unchanged on exit.
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56 *
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57 * N - INTEGER.
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58 * On entry, N specifies the number of columns of the matrix
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59 * op( B ) and the number of columns of the matrix C. N must be
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60 * at least zero.
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61 * Unchanged on exit.
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62 *
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63 * K - INTEGER.
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64 * On entry, K specifies the number of columns of the matrix
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65 * op( A ) and the number of rows of the matrix op( B ). K must
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66 * be at least zero.
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67 * Unchanged on exit.
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68 *
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69 * ALPHA - REAL .
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70 * On entry, ALPHA specifies the scalar alpha.
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71 * Unchanged on exit.
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72 *
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73 * A - REAL array of DIMENSION ( LDA, ka ), where ka is
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74 * k when TRANSA = 'N' or 'n', and is m otherwise.
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75 * Before entry with TRANSA = 'N' or 'n', the leading m by k
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76 * part of the array A must contain the matrix A, otherwise
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77 * the leading k by m part of the array A must contain the
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78 * matrix A.
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79 * Unchanged on exit.
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80 *
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81 * LDA - INTEGER.
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82 * On entry, LDA specifies the first dimension of A as declared
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83 * in the calling (sub) program. When TRANSA = 'N' or 'n' then
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84 * LDA must be at least max( 1, m ), otherwise LDA must be at
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85 * least max( 1, k ).
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86 * Unchanged on exit.
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87 *
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88 * B - REAL array of DIMENSION ( LDB, kb ), where kb is
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89 * n when TRANSB = 'N' or 'n', and is k otherwise.
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90 * Before entry with TRANSB = 'N' or 'n', the leading k by n
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91 * part of the array B must contain the matrix B, otherwise
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92 * the leading n by k part of the array B must contain the
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93 * matrix B.
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94 * Unchanged on exit.
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95 *
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96 * LDB - INTEGER.
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97 * On entry, LDB specifies the first dimension of B as declared
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98 * in the calling (sub) program. When TRANSB = 'N' or 'n' then
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99 * LDB must be at least max( 1, k ), otherwise LDB must be at
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100 * least max( 1, n ).
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101 * Unchanged on exit.
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102 *
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103 * BETA - REAL .
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104 * On entry, BETA specifies the scalar beta. When BETA is
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105 * supplied as zero then C need not be set on input.
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106 * Unchanged on exit.
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107 *
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108 * C - REAL array of DIMENSION ( LDC, n ).
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109 * Before entry, the leading m by n part of the array C must
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110 * contain the matrix C, except when beta is zero, in which
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111 * case C need not be set on entry.
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112 * On exit, the array C is overwritten by the m by n matrix
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113 * ( alpha*op( A )*op( B ) + beta*C ).
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114 *
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115 * LDC - INTEGER.
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116 * On entry, LDC specifies the first dimension of C as declared
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117 * in the calling (sub) program. LDC must be at least
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118 * max( 1, m ).
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119 * Unchanged on exit.
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120 *
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121 *
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122 * Level 3 Blas routine.
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123 *
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124 * -- Written on 8-February-1989.
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125 * Jack Dongarra, Argonne National Laboratory.
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126 * Iain Duff, AERE Harwell.
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127 * Jeremy Du Croz, Numerical Algorithms Group Ltd.
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128 * Sven Hammarling, Numerical Algorithms Group Ltd.
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129 *
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130 *
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131 * .. External Functions ..
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132 LOGICAL LSAME
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133 EXTERNAL LSAME
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134 * .. External Subroutines ..
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135 EXTERNAL XERBLA
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136 * .. Intrinsic Functions ..
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137 INTRINSIC MAX
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138 * .. Local Scalars ..
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139 LOGICAL NOTA, NOTB
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140 INTEGER I, INFO, J, L, NCOLA, NROWA, NROWB
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141 REAL TEMP
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142 * .. Parameters ..
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143 REAL ONE , ZERO
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144 PARAMETER ( ONE = 1.0E+0, ZERO = 0.0E+0 )
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145 * ..
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146 * .. Executable Statements ..
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147 *
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148 * Set NOTA and NOTB as true if A and B respectively are not
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149 * transposed and set NROWA, NCOLA and NROWB as the number of rows
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150 * and columns of A and the number of rows of B respectively.
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151 *
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152 NOTA = LSAME( TRANSA, 'N' )
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153 NOTB = LSAME( TRANSB, 'N' )
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154 IF( NOTA )THEN
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155 NROWA = M
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156 NCOLA = K
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157 ELSE
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158 NROWA = K
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159 NCOLA = M
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160 END IF
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161 IF( NOTB )THEN
024ef171aec3 [project @ 2003-02-20 23:31:46 by jwe]
jwe
parents:
diff changeset
162 NROWB = K
024ef171aec3 [project @ 2003-02-20 23:31:46 by jwe]
jwe
parents:
diff changeset
163 ELSE
024ef171aec3 [project @ 2003-02-20 23:31:46 by jwe]
jwe
parents:
diff changeset
164 NROWB = N
024ef171aec3 [project @ 2003-02-20 23:31:46 by jwe]
jwe
parents:
diff changeset
165 END IF
024ef171aec3 [project @ 2003-02-20 23:31:46 by jwe]
jwe
parents:
diff changeset
166 *
024ef171aec3 [project @ 2003-02-20 23:31:46 by jwe]
jwe
parents:
diff changeset
167 * Test the input parameters.
024ef171aec3 [project @ 2003-02-20 23:31:46 by jwe]
jwe
parents:
diff changeset
168 *
024ef171aec3 [project @ 2003-02-20 23:31:46 by jwe]
jwe
parents:
diff changeset
169 INFO = 0
024ef171aec3 [project @ 2003-02-20 23:31:46 by jwe]
jwe
parents:
diff changeset
170 IF( ( .NOT.NOTA ).AND.
024ef171aec3 [project @ 2003-02-20 23:31:46 by jwe]
jwe
parents:
diff changeset
171 $ ( .NOT.LSAME( TRANSA, 'C' ) ).AND.
024ef171aec3 [project @ 2003-02-20 23:31:46 by jwe]
jwe
parents:
diff changeset
172 $ ( .NOT.LSAME( TRANSA, 'T' ) ) )THEN
024ef171aec3 [project @ 2003-02-20 23:31:46 by jwe]
jwe
parents:
diff changeset
173 INFO = 1
024ef171aec3 [project @ 2003-02-20 23:31:46 by jwe]
jwe
parents:
diff changeset
174 ELSE IF( ( .NOT.NOTB ).AND.
024ef171aec3 [project @ 2003-02-20 23:31:46 by jwe]
jwe
parents:
diff changeset
175 $ ( .NOT.LSAME( TRANSB, 'C' ) ).AND.
024ef171aec3 [project @ 2003-02-20 23:31:46 by jwe]
jwe
parents:
diff changeset
176 $ ( .NOT.LSAME( TRANSB, 'T' ) ) )THEN
024ef171aec3 [project @ 2003-02-20 23:31:46 by jwe]
jwe
parents:
diff changeset
177 INFO = 2
024ef171aec3 [project @ 2003-02-20 23:31:46 by jwe]
jwe
parents:
diff changeset
178 ELSE IF( M .LT.0 )THEN
024ef171aec3 [project @ 2003-02-20 23:31:46 by jwe]
jwe
parents:
diff changeset
179 INFO = 3
024ef171aec3 [project @ 2003-02-20 23:31:46 by jwe]
jwe
parents:
diff changeset
180 ELSE IF( N .LT.0 )THEN
024ef171aec3 [project @ 2003-02-20 23:31:46 by jwe]
jwe
parents:
diff changeset
181 INFO = 4
024ef171aec3 [project @ 2003-02-20 23:31:46 by jwe]
jwe
parents:
diff changeset
182 ELSE IF( K .LT.0 )THEN
024ef171aec3 [project @ 2003-02-20 23:31:46 by jwe]
jwe
parents:
diff changeset
183 INFO = 5
024ef171aec3 [project @ 2003-02-20 23:31:46 by jwe]
jwe
parents:
diff changeset
184 ELSE IF( LDA.LT.MAX( 1, NROWA ) )THEN
024ef171aec3 [project @ 2003-02-20 23:31:46 by jwe]
jwe
parents:
diff changeset
185 INFO = 8
024ef171aec3 [project @ 2003-02-20 23:31:46 by jwe]
jwe
parents:
diff changeset
186 ELSE IF( LDB.LT.MAX( 1, NROWB ) )THEN
024ef171aec3 [project @ 2003-02-20 23:31:46 by jwe]
jwe
parents:
diff changeset
187 INFO = 10
024ef171aec3 [project @ 2003-02-20 23:31:46 by jwe]
jwe
parents:
diff changeset
188 ELSE IF( LDC.LT.MAX( 1, M ) )THEN
024ef171aec3 [project @ 2003-02-20 23:31:46 by jwe]
jwe
parents:
diff changeset
189 INFO = 13
024ef171aec3 [project @ 2003-02-20 23:31:46 by jwe]
jwe
parents:
diff changeset
190 END IF
024ef171aec3 [project @ 2003-02-20 23:31:46 by jwe]
jwe
parents:
diff changeset
191 IF( INFO.NE.0 )THEN
024ef171aec3 [project @ 2003-02-20 23:31:46 by jwe]
jwe
parents:
diff changeset
192 CALL XERBLA( 'SGEMM ', INFO )
024ef171aec3 [project @ 2003-02-20 23:31:46 by jwe]
jwe
parents:
diff changeset
193 RETURN
024ef171aec3 [project @ 2003-02-20 23:31:46 by jwe]
jwe
parents:
diff changeset
194 END IF
024ef171aec3 [project @ 2003-02-20 23:31:46 by jwe]
jwe
parents:
diff changeset
195 *
024ef171aec3 [project @ 2003-02-20 23:31:46 by jwe]
jwe
parents:
diff changeset
196 * Quick return if possible.
024ef171aec3 [project @ 2003-02-20 23:31:46 by jwe]
jwe
parents:
diff changeset
197 *
024ef171aec3 [project @ 2003-02-20 23:31:46 by jwe]
jwe
parents:
diff changeset
198 IF( ( M.EQ.0 ).OR.( N.EQ.0 ).OR.
024ef171aec3 [project @ 2003-02-20 23:31:46 by jwe]
jwe
parents:
diff changeset
199 $ ( ( ( ALPHA.EQ.ZERO ).OR.( K.EQ.0 ) ).AND.( BETA.EQ.ONE ) ) )
024ef171aec3 [project @ 2003-02-20 23:31:46 by jwe]
jwe
parents:
diff changeset
200 $ RETURN
024ef171aec3 [project @ 2003-02-20 23:31:46 by jwe]
jwe
parents:
diff changeset
201 *
024ef171aec3 [project @ 2003-02-20 23:31:46 by jwe]
jwe
parents:
diff changeset
202 * And if alpha.eq.zero.
024ef171aec3 [project @ 2003-02-20 23:31:46 by jwe]
jwe
parents:
diff changeset
203 *
024ef171aec3 [project @ 2003-02-20 23:31:46 by jwe]
jwe
parents:
diff changeset
204 IF( ALPHA.EQ.ZERO )THEN
024ef171aec3 [project @ 2003-02-20 23:31:46 by jwe]
jwe
parents:
diff changeset
205 IF( BETA.EQ.ZERO )THEN
024ef171aec3 [project @ 2003-02-20 23:31:46 by jwe]
jwe
parents:
diff changeset
206 DO 20, J = 1, N
024ef171aec3 [project @ 2003-02-20 23:31:46 by jwe]
jwe
parents:
diff changeset
207 DO 10, I = 1, M
024ef171aec3 [project @ 2003-02-20 23:31:46 by jwe]
jwe
parents:
diff changeset
208 C( I, J ) = ZERO
024ef171aec3 [project @ 2003-02-20 23:31:46 by jwe]
jwe
parents:
diff changeset
209 10 CONTINUE
024ef171aec3 [project @ 2003-02-20 23:31:46 by jwe]
jwe
parents:
diff changeset
210 20 CONTINUE
024ef171aec3 [project @ 2003-02-20 23:31:46 by jwe]
jwe
parents:
diff changeset
211 ELSE
024ef171aec3 [project @ 2003-02-20 23:31:46 by jwe]
jwe
parents:
diff changeset
212 DO 40, J = 1, N
024ef171aec3 [project @ 2003-02-20 23:31:46 by jwe]
jwe
parents:
diff changeset
213 DO 30, I = 1, M
024ef171aec3 [project @ 2003-02-20 23:31:46 by jwe]
jwe
parents:
diff changeset
214 C( I, J ) = BETA*C( I, J )
024ef171aec3 [project @ 2003-02-20 23:31:46 by jwe]
jwe
parents:
diff changeset
215 30 CONTINUE
024ef171aec3 [project @ 2003-02-20 23:31:46 by jwe]
jwe
parents:
diff changeset
216 40 CONTINUE
024ef171aec3 [project @ 2003-02-20 23:31:46 by jwe]
jwe
parents:
diff changeset
217 END IF
024ef171aec3 [project @ 2003-02-20 23:31:46 by jwe]
jwe
parents:
diff changeset
218 RETURN
024ef171aec3 [project @ 2003-02-20 23:31:46 by jwe]
jwe
parents:
diff changeset
219 END IF
024ef171aec3 [project @ 2003-02-20 23:31:46 by jwe]
jwe
parents:
diff changeset
220 *
024ef171aec3 [project @ 2003-02-20 23:31:46 by jwe]
jwe
parents:
diff changeset
221 * Start the operations.
024ef171aec3 [project @ 2003-02-20 23:31:46 by jwe]
jwe
parents:
diff changeset
222 *
024ef171aec3 [project @ 2003-02-20 23:31:46 by jwe]
jwe
parents:
diff changeset
223 IF( NOTB )THEN
024ef171aec3 [project @ 2003-02-20 23:31:46 by jwe]
jwe
parents:
diff changeset
224 IF( NOTA )THEN
024ef171aec3 [project @ 2003-02-20 23:31:46 by jwe]
jwe
parents:
diff changeset
225 *
024ef171aec3 [project @ 2003-02-20 23:31:46 by jwe]
jwe
parents:
diff changeset
226 * Form C := alpha*A*B + beta*C.
024ef171aec3 [project @ 2003-02-20 23:31:46 by jwe]
jwe
parents:
diff changeset
227 *
024ef171aec3 [project @ 2003-02-20 23:31:46 by jwe]
jwe
parents:
diff changeset
228 DO 90, J = 1, N
024ef171aec3 [project @ 2003-02-20 23:31:46 by jwe]
jwe
parents:
diff changeset
229 IF( BETA.EQ.ZERO )THEN
024ef171aec3 [project @ 2003-02-20 23:31:46 by jwe]
jwe
parents:
diff changeset
230 DO 50, I = 1, M
024ef171aec3 [project @ 2003-02-20 23:31:46 by jwe]
jwe
parents:
diff changeset
231 C( I, J ) = ZERO
024ef171aec3 [project @ 2003-02-20 23:31:46 by jwe]
jwe
parents:
diff changeset
232 50 CONTINUE
024ef171aec3 [project @ 2003-02-20 23:31:46 by jwe]
jwe
parents:
diff changeset
233 ELSE IF( BETA.NE.ONE )THEN
024ef171aec3 [project @ 2003-02-20 23:31:46 by jwe]
jwe
parents:
diff changeset
234 DO 60, I = 1, M
024ef171aec3 [project @ 2003-02-20 23:31:46 by jwe]
jwe
parents:
diff changeset
235 C( I, J ) = BETA*C( I, J )
024ef171aec3 [project @ 2003-02-20 23:31:46 by jwe]
jwe
parents:
diff changeset
236 60 CONTINUE
024ef171aec3 [project @ 2003-02-20 23:31:46 by jwe]
jwe
parents:
diff changeset
237 END IF
024ef171aec3 [project @ 2003-02-20 23:31:46 by jwe]
jwe
parents:
diff changeset
238 DO 80, L = 1, K
024ef171aec3 [project @ 2003-02-20 23:31:46 by jwe]
jwe
parents:
diff changeset
239 IF( B( L, J ).NE.ZERO )THEN
024ef171aec3 [project @ 2003-02-20 23:31:46 by jwe]
jwe
parents:
diff changeset
240 TEMP = ALPHA*B( L, J )
024ef171aec3 [project @ 2003-02-20 23:31:46 by jwe]
jwe
parents:
diff changeset
241 DO 70, I = 1, M
024ef171aec3 [project @ 2003-02-20 23:31:46 by jwe]
jwe
parents:
diff changeset
242 C( I, J ) = C( I, J ) + TEMP*A( I, L )
024ef171aec3 [project @ 2003-02-20 23:31:46 by jwe]
jwe
parents:
diff changeset
243 70 CONTINUE
024ef171aec3 [project @ 2003-02-20 23:31:46 by jwe]
jwe
parents:
diff changeset
244 END IF
024ef171aec3 [project @ 2003-02-20 23:31:46 by jwe]
jwe
parents:
diff changeset
245 80 CONTINUE
024ef171aec3 [project @ 2003-02-20 23:31:46 by jwe]
jwe
parents:
diff changeset
246 90 CONTINUE
024ef171aec3 [project @ 2003-02-20 23:31:46 by jwe]
jwe
parents:
diff changeset
247 ELSE
024ef171aec3 [project @ 2003-02-20 23:31:46 by jwe]
jwe
parents:
diff changeset
248 *
024ef171aec3 [project @ 2003-02-20 23:31:46 by jwe]
jwe
parents:
diff changeset
249 * Form C := alpha*A'*B + beta*C
024ef171aec3 [project @ 2003-02-20 23:31:46 by jwe]
jwe
parents:
diff changeset
250 *
024ef171aec3 [project @ 2003-02-20 23:31:46 by jwe]
jwe
parents:
diff changeset
251 DO 120, J = 1, N
024ef171aec3 [project @ 2003-02-20 23:31:46 by jwe]
jwe
parents:
diff changeset
252 DO 110, I = 1, M
024ef171aec3 [project @ 2003-02-20 23:31:46 by jwe]
jwe
parents:
diff changeset
253 TEMP = ZERO
024ef171aec3 [project @ 2003-02-20 23:31:46 by jwe]
jwe
parents:
diff changeset
254 DO 100, L = 1, K
024ef171aec3 [project @ 2003-02-20 23:31:46 by jwe]
jwe
parents:
diff changeset
255 TEMP = TEMP + A( L, I )*B( L, J )
024ef171aec3 [project @ 2003-02-20 23:31:46 by jwe]
jwe
parents:
diff changeset
256 100 CONTINUE
024ef171aec3 [project @ 2003-02-20 23:31:46 by jwe]
jwe
parents:
diff changeset
257 IF( BETA.EQ.ZERO )THEN
024ef171aec3 [project @ 2003-02-20 23:31:46 by jwe]
jwe
parents:
diff changeset
258 C( I, J ) = ALPHA*TEMP
024ef171aec3 [project @ 2003-02-20 23:31:46 by jwe]
jwe
parents:
diff changeset
259 ELSE
024ef171aec3 [project @ 2003-02-20 23:31:46 by jwe]
jwe
parents:
diff changeset
260 C( I, J ) = ALPHA*TEMP + BETA*C( I, J )
024ef171aec3 [project @ 2003-02-20 23:31:46 by jwe]
jwe
parents:
diff changeset
261 END IF
024ef171aec3 [project @ 2003-02-20 23:31:46 by jwe]
jwe
parents:
diff changeset
262 110 CONTINUE
024ef171aec3 [project @ 2003-02-20 23:31:46 by jwe]
jwe
parents:
diff changeset
263 120 CONTINUE
024ef171aec3 [project @ 2003-02-20 23:31:46 by jwe]
jwe
parents:
diff changeset
264 END IF
024ef171aec3 [project @ 2003-02-20 23:31:46 by jwe]
jwe
parents:
diff changeset
265 ELSE
024ef171aec3 [project @ 2003-02-20 23:31:46 by jwe]
jwe
parents:
diff changeset
266 IF( NOTA )THEN
024ef171aec3 [project @ 2003-02-20 23:31:46 by jwe]
jwe
parents:
diff changeset
267 *
024ef171aec3 [project @ 2003-02-20 23:31:46 by jwe]
jwe
parents:
diff changeset
268 * Form C := alpha*A*B' + beta*C
024ef171aec3 [project @ 2003-02-20 23:31:46 by jwe]
jwe
parents:
diff changeset
269 *
024ef171aec3 [project @ 2003-02-20 23:31:46 by jwe]
jwe
parents:
diff changeset
270 DO 170, J = 1, N
024ef171aec3 [project @ 2003-02-20 23:31:46 by jwe]
jwe
parents:
diff changeset
271 IF( BETA.EQ.ZERO )THEN
024ef171aec3 [project @ 2003-02-20 23:31:46 by jwe]
jwe
parents:
diff changeset
272 DO 130, I = 1, M
024ef171aec3 [project @ 2003-02-20 23:31:46 by jwe]
jwe
parents:
diff changeset
273 C( I, J ) = ZERO
024ef171aec3 [project @ 2003-02-20 23:31:46 by jwe]
jwe
parents:
diff changeset
274 130 CONTINUE
024ef171aec3 [project @ 2003-02-20 23:31:46 by jwe]
jwe
parents:
diff changeset
275 ELSE IF( BETA.NE.ONE )THEN
024ef171aec3 [project @ 2003-02-20 23:31:46 by jwe]
jwe
parents:
diff changeset
276 DO 140, I = 1, M
024ef171aec3 [project @ 2003-02-20 23:31:46 by jwe]
jwe
parents:
diff changeset
277 C( I, J ) = BETA*C( I, J )
024ef171aec3 [project @ 2003-02-20 23:31:46 by jwe]
jwe
parents:
diff changeset
278 140 CONTINUE
024ef171aec3 [project @ 2003-02-20 23:31:46 by jwe]
jwe
parents:
diff changeset
279 END IF
024ef171aec3 [project @ 2003-02-20 23:31:46 by jwe]
jwe
parents:
diff changeset
280 DO 160, L = 1, K
024ef171aec3 [project @ 2003-02-20 23:31:46 by jwe]
jwe
parents:
diff changeset
281 IF( B( J, L ).NE.ZERO )THEN
024ef171aec3 [project @ 2003-02-20 23:31:46 by jwe]
jwe
parents:
diff changeset
282 TEMP = ALPHA*B( J, L )
024ef171aec3 [project @ 2003-02-20 23:31:46 by jwe]
jwe
parents:
diff changeset
283 DO 150, I = 1, M
024ef171aec3 [project @ 2003-02-20 23:31:46 by jwe]
jwe
parents:
diff changeset
284 C( I, J ) = C( I, J ) + TEMP*A( I, L )
024ef171aec3 [project @ 2003-02-20 23:31:46 by jwe]
jwe
parents:
diff changeset
285 150 CONTINUE
024ef171aec3 [project @ 2003-02-20 23:31:46 by jwe]
jwe
parents:
diff changeset
286 END IF
024ef171aec3 [project @ 2003-02-20 23:31:46 by jwe]
jwe
parents:
diff changeset
287 160 CONTINUE
024ef171aec3 [project @ 2003-02-20 23:31:46 by jwe]
jwe
parents:
diff changeset
288 170 CONTINUE
024ef171aec3 [project @ 2003-02-20 23:31:46 by jwe]
jwe
parents:
diff changeset
289 ELSE
024ef171aec3 [project @ 2003-02-20 23:31:46 by jwe]
jwe
parents:
diff changeset
290 *
024ef171aec3 [project @ 2003-02-20 23:31:46 by jwe]
jwe
parents:
diff changeset
291 * Form C := alpha*A'*B' + beta*C
024ef171aec3 [project @ 2003-02-20 23:31:46 by jwe]
jwe
parents:
diff changeset
292 *
024ef171aec3 [project @ 2003-02-20 23:31:46 by jwe]
jwe
parents:
diff changeset
293 DO 200, J = 1, N
024ef171aec3 [project @ 2003-02-20 23:31:46 by jwe]
jwe
parents:
diff changeset
294 DO 190, I = 1, M
024ef171aec3 [project @ 2003-02-20 23:31:46 by jwe]
jwe
parents:
diff changeset
295 TEMP = ZERO
024ef171aec3 [project @ 2003-02-20 23:31:46 by jwe]
jwe
parents:
diff changeset
296 DO 180, L = 1, K
024ef171aec3 [project @ 2003-02-20 23:31:46 by jwe]
jwe
parents:
diff changeset
297 TEMP = TEMP + A( L, I )*B( J, L )
024ef171aec3 [project @ 2003-02-20 23:31:46 by jwe]
jwe
parents:
diff changeset
298 180 CONTINUE
024ef171aec3 [project @ 2003-02-20 23:31:46 by jwe]
jwe
parents:
diff changeset
299 IF( BETA.EQ.ZERO )THEN
024ef171aec3 [project @ 2003-02-20 23:31:46 by jwe]
jwe
parents:
diff changeset
300 C( I, J ) = ALPHA*TEMP
024ef171aec3 [project @ 2003-02-20 23:31:46 by jwe]
jwe
parents:
diff changeset
301 ELSE
024ef171aec3 [project @ 2003-02-20 23:31:46 by jwe]
jwe
parents:
diff changeset
302 C( I, J ) = ALPHA*TEMP + BETA*C( I, J )
024ef171aec3 [project @ 2003-02-20 23:31:46 by jwe]
jwe
parents:
diff changeset
303 END IF
024ef171aec3 [project @ 2003-02-20 23:31:46 by jwe]
jwe
parents:
diff changeset
304 190 CONTINUE
024ef171aec3 [project @ 2003-02-20 23:31:46 by jwe]
jwe
parents:
diff changeset
305 200 CONTINUE
024ef171aec3 [project @ 2003-02-20 23:31:46 by jwe]
jwe
parents:
diff changeset
306 END IF
024ef171aec3 [project @ 2003-02-20 23:31:46 by jwe]
jwe
parents:
diff changeset
307 END IF
024ef171aec3 [project @ 2003-02-20 23:31:46 by jwe]
jwe
parents:
diff changeset
308 *
024ef171aec3 [project @ 2003-02-20 23:31:46 by jwe]
jwe
parents:
diff changeset
309 RETURN
024ef171aec3 [project @ 2003-02-20 23:31:46 by jwe]
jwe
parents:
diff changeset
310 *
024ef171aec3 [project @ 2003-02-20 23:31:46 by jwe]
jwe
parents:
diff changeset
311 * End of SGEMM .
024ef171aec3 [project @ 2003-02-20 23:31:46 by jwe]
jwe
parents:
diff changeset
312 *
024ef171aec3 [project @ 2003-02-20 23:31:46 by jwe]
jwe
parents:
diff changeset
313 END