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function test241
%TEST241 test GrB_mxm: swap_rule
% SuiteSparse:GraphBLAS, Timothy A. Davis, (c) 2017-2022, All Rights Reserved.
% SPDX-License-Identifier: Apache-2.0
fprintf ('test241 -------- GrB_mxm swap_rule\n') ;
rng ('default') ;
monoid.opname = 'plus' ;
monoid.optype = 'double' ;
semiring.add = monoid ;
semiring.multiply = 'times' ;
semiring.class = 'double' ;
n = 10 ;
is_csc = true ;
A_csc = GB_spec_random (n, n, 0.5, 100, 'double', true) ;
B_csc = GB_spec_random (n, n, 0.5, 100, 'double', true) ;
A_csr = GB_spec_random (n, n, 0.5, 100, 'double', false) ;
B_csr = GB_spec_random (n, n, 0.5, 100, 'double', false) ;
C_csr = GB_spec_random (n, n, 0.5, 100, 'double', false) ;
% C' = A'*B'
C1 = GB_mex_mxm (C_csr, [ ], [ ], semiring, A_csr, B_csr, [ ]) ;
C2 = GB_spec_mxm (C_csr, [ ], [ ], semiring, A_csr, B_csr, [ ]) ;
GB_spec_compare (C1, C2, 0, 1e-12) ;
% C' = A'*B
C1 = GB_mex_mxm (C_csr, [ ], [ ], semiring, A_csr, B_csc, [ ]) ;
C2 = GB_spec_mxm (C_csr, [ ], [ ], semiring, A_csr, B_csc, [ ]) ;
GB_spec_compare (C1, C2, 0, 1e-12) ;
% C' = A*B'
C1 = GB_mex_mxm (C_csr, [ ], [ ], semiring, A_csc, B_csr, [ ]) ;
C2 = GB_spec_mxm (C_csr, [ ], [ ], semiring, A_csc, B_csr, [ ]) ;
GB_spec_compare (C1, C2, 0, 1e-12) ;
% C' = A*B
C1 = GB_mex_mxm (C_csr, [ ], [ ], semiring, A_csc, B_csc, [ ]) ;
C2 = GB_spec_mxm (C_csr, [ ], [ ], semiring, A_csc, B_csc, [ ]) ;
GB_spec_compare (C1, C2, 0, 1e-12) ;
% C' = A'*B, triggering the swap_rule test
n = 1000 ;
A_csr = GB_spec_random (n, n, 0.01, 100, 'double', false) ;
B_csc = GB_spec_random (n, n, 0.01, 100, 'double', true) ;
C_csr = GB_spec_random (n, n, 0.01, 100, 'double', false) ;
C1 = GB_mex_mxm (C_csr, [ ], [ ], semiring, A_csr, B_csc, [ ]) ;
C2 = A_csr.matrix * B_csc.matrix ;
GB_spec_compare (C1, C2, 0, 1e-12) ;
GrB.burble (0) ;
fprintf ('\ntest241: all tests passed\n') ;
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