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RISCV ALU Specifications

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michaelScott

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Hello people,
I am designing an ALU for RISCV processor and i wonder if i need to perform compare and branches instructions inside the alu.
thanks in advance
 

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Hi
michaelScott said:
i wonder if i need to perform compare and branches instructions inside the alu.
Click to expand...
a branch is usually not the task of an ALU
..but the compare usually is performed as a subtract ... by at least setting some flags...

Klaus
 

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KlausST said:
Hi

a branch is usually not the task of an ALU
..but the compare usually is performed as a subtract ... by at least setting some flags...

Klaus
Click to expand...
thanks for the reply,
so we perform arithmetical, logical, compare, jump&link operations in the ALU right?
 

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Hi,

sorry for not being clear enough.
Again: I don´t think a "jump" or "branch" belongs to the ALU.

There are internet sites like wikipedia and many others that more exactly define what´s an ALU.

Klaus
 

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