Quote Originally Posted by Oliverda View Post
Thanks, so there is no newer information about AGLUs.

My speculation: if the AGLUs can handle any of the ALU operations, then they must know normal, zero and sign-extended register copy at least, so the instruction table is inaccurate. The additions also must be handled by them and with a slightly more compexity the SUB, NEG, INC, DEC and CMP operations (not the fused compares, just the standalone ones). The logical NOTs, ANDs, ORs, XORs and (not fused) TESTs also requires only a little more simple circuits.

And exaclty these operations are performed by the double-pumped fast ALUs in Netburst, at 4/cycle rate.
Maybe, some people on the Net had speculated that simple ALU or AGLU on BD may handle instructions like 30 years old 6502.

However, mov, push and call are most frequent instructions in x86 machine code. Also the SUB, NEG, INC, DEC and CMP is often used, so AGLU unit could be very useful.

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