`m-``A``B``#!optional``RESULT`procedureSubtract matrix

`B`from matrix`A`. If the matrix`RESULT`is given, it will be modified to contain the results of the multiplication. If`RESULT`is`#t`,`A`and`B`must be f32vectors and the returned value will be an f32vector located in non-garbage-collected memory (the memory will still be freed when there are no more references to the matrix). If`RESULT`is not provided,`A`and`B`must be f32vectors and the returned value will be an f32vector located in normal garbage collected memory.