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Still more instruction things giving me head ache.
This time it's the MUL-instruction.
What the heck means:
Multiply multiplies two register values. The least significant 32 bits of the result are written to the destination register. These 32 bits do not depend on whether the source register values are considered to be signed values or unsigned values.
Multiply multiplies two register values. The least significant 32 bits of the result are written to the destination
register. These 32 bits do not depend on whether the source register values are considered to be signed values or
unsigned values.
(The bolded part)
In other words, the result is not valid in the case overflow in the 32 bit range.
So it's basically unsigned?
It's still mystery for me, though, what this:
if x<N-1> == '1' then result = result - 2^N;
in the pseudocode of SInt(bits(N) x) is supposed to mean.
'2^N - result' would be 2's complement, but 'result - 2^N' should be negative of that.
I.e. result (or - -result)