Answer:
not $s1,$t5
=
nor $s1, $t5, $0
The order of $t5 and $0 could be reversed.
(You could also say $zero rather than $0.)
not $s1,$t5
=
nor $s1, $t5, $0
The order of $t5 and $0 could be reversed.
(You could also say $zero rather than $0.)
Some pseudoinstructions translate into different basic instructions depending on the type of operands. A pseudoinstruction used with an immediate operand translates into different basic instructions than one used with all register operands.
Sometimes the same mnemonic
is used for a basic instruction and also for a
pseudoinstruction.
For example, you can use the mnemonic or
for an or with register operands and also for an or with an immediate operand:
or $s0,$s1,0x00ff translates into: ori $s0,$s1,0x00ff
Here, the extended assembler notices the immediate
operand and translates the instruction into an
ori basic instruction.
The resulting machine code is a 32-bit or immediate.
However, the following is a basic instruction:
or $s0,$s1,$t1
This assembly instruction is not changed.
The resulting machine code is a 32-bit or instruction.
The mmenomic
and
is similar.
It might call for the
basic instruction
and,
or the basic instruction
andi,
or other basic instructions
depending on the operands.
Is there both a basic add instruction and an add immediate instruction?