Added Pseudo-instructions from F and D. Allow for instructions to have a special field. #279
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This time there was a need to modify parse.py a tiny bit in order to fully accommodate all pseudo-instructions.
Since parse.py did not allow to have pseudoinstructions with the two of the same register(e.g. fmv_s rs, rs) due to how it parses, I created a work around, that I succesfully checked does not break any of the pre-existing instructions. It allows that a register is equalled to anything, as in, "rs2=rs1" and uses the "rs2" to know it's position in encoding.
Adittionally, I added the following pseudo-instructions:
F
fmv.s
fabs.s
fneg.s
D
fmv.d
fabs.d
fneg.d