--spim-compatibility flag

[andrew-taylor]

spim supports some features which are not necessary and perhaps not even desirable in an intro assembler class.

mipsy might support them with a --spim-compatibility flag

For example, spim converts some real instructions into other instructions=

jal $31 add $8, $8, 1 addi $7, 1

Another example, allows any number of commas as separators, e.g:

li,,$4,,,5

[insou22]

update, we have a --spim flag to run in a "spim-compatbility mode". however, currently this only enables .space directives to insert zeroes, as opposed to uninitialised bytes.

there is a lot of scope for this issue, so I'll leave it open for the meanwhile.

[Dylan-Brotherston]

spim will initialise everything to zero. including registers and stack memory.