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function test125
%TEST125 test GrB_mxm: row and column scaling
% all built-in semirings, no typecast, no mask
% SuiteSparse:GraphBLAS, Timothy A. Davis, (c) 2017-2025, All Rights Reserved.
% SPDX-License-Identifier: Apache-2.0
[binops, ~, add_ops, types, ~, ~] = GB_spec_opsall ;
mult_ops = binops.all ;
types = types.all ;
fprintf ('-------------- GrB_mxm on all semirings (row,col scale)\n') ;
dnn = struct ;
dtn = struct ( 'inp0', 'tran' ) ;
dnt = struct ( 'inp1', 'tran' ) ;
dtt = struct ( 'inp0', 'tran', 'inp1', 'tran' ) ;
rng ('default') ;
n = 10 ;
n_semirings = 0 ;
A = GB_spec_random (n,n,0.3,100,'none') ;
clear B
B1matrix = spdiags (3 * rand (n,1), 0, n, n) ;
B.matrix = B1matrix ;
B.class = 'none' ;
B.pattern = logical (spones (B1matrix)) ;
C = GB_spec_random (n,n,0.3,100,'none') ;
M = spones (sprandn (n, n, 0.3)) ;
for k1 = 1:length(mult_ops)
mulop = mult_ops {k1} ;
fprintf ('\n%-10s ', mulop) ;
nmult_semirings = 0 ;
for k2 = 1:length(add_ops)
addop = add_ops {k2} ;
fprintf ('.') ;
for k3 = 1:length (types)
type = types {k3} ;
semiring.multiply = mulop ;
semiring.add = addop ;
semiring.class = type ;
% semiring
% create the semiring. some are not valid because the
% or,and,xor monoids can only be used when z is boolean for
% z=mult(x,y).
try
[mult_op add_op id] = GB_spec_semiring (semiring) ;
[mult_opname mult_optype ztype xtype ytype] = ...
GB_spec_operator (mult_op) ;
[ add_opname add_optype] = GB_spec_operator (add_op) ;
identity = GB_spec_identity (semiring.add, add_optype) ;
catch
continue
end
n_semirings = n_semirings + 1 ;
nmult_semirings = nmult_semirings + 1 ;
A.class = type ;
B.class = type ;
C.class = type ;
% C = A*B
C1 = GB_mex_mxm (C, [ ], [ ], semiring, A, B, dnn);
C0 = GB_spec_mxm (C, [ ], [ ], semiring, A, B, dnn);
GB_spec_compare (C0, C1, identity) ;
% C = B*A
C1 = GB_mex_mxm (C, [ ], [ ], semiring, B, A, dnn);
C0 = GB_spec_mxm (C, [ ], [ ], semiring, B, A, dnn);
GB_spec_compare (C0, C1, identity) ;
end
end
fprintf (' %4d', nmult_semirings) ;
end
fprintf ('\nsemirings tested: %d\n', n_semirings) ;
fprintf ('\ntest125: all tests passed\n') ;
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