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function test237
%TEST237 test GrB_mxm (saxpy4)
% SuiteSparse:GraphBLAS, Timothy A. Davis, (c) 2017-2025, All Rights Reserved.
% SPDX-License-Identifier: Apache-2.0
GB_mex_burble (1) ;
rng ('default') ;
n = 32 ;
for kind = 1:2
if (kind == 1)
add = 'plus' ;
class = 'double' ;
else
add = 'times' ;
class = 'single complex' ;
end
accum.opname = add ;
accum.optype = class ;
tol = 1e-6 ;
semiring.multiply = 'times' ;
semiring.add = add ;
semiring.class = class ;
semiring
% k = 1 with a sparser A matrix
A = GB_spec_random (n, n, 0.05, 1, class) ;
B = GB_spec_random (n, 1, 0.3, 1, class) ;
B.sparsity = 4 ; % bitmap
F = GB_spec_random (n, 1, inf, 1, class) ;
F.sparsity = 8 ; % full
A.sparsity = 2 ; % sparse
C1 = GB_mex_mxm (F, [ ], accum, semiring, A, B, [ ]) ;
C2 = GB_spec_mxm (F, [ ], accum, semiring, A, B, [ ]) ;
GB_spec_compare (C2, C1, 0, tol) ;
% typecasting (to trigger the JIT)
A.class = 'single' ;
C1s = GB_mex_mxm (F, [ ], accum, semiring, A, B, [ ]) ;
C2s = GB_spec_mxm (F, [ ], accum, semiring, A, B, [ ]) ;
GB_spec_compare (C2s, C1s, 0, tol) ;
end
GB_mex_burble (0) ;
fprintf ('test237: all tests passed\n') ;
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