No Subject
- To: MISC
- From: lowry@xxxxxxxxxxxxxxxxx (Dave Lowry)
- Date: Tue, 18 Apr 95 16:48:34 CDT
- Posted-Date: Tue, 18 Apr 95 16:48:34 CDT
On Tue, 18 Apr 1995 rockwell@nova.umd.edu wrote:
> Consider this instruction sequence:
> a! @+ a dup
> dup -or com nop
> +
>
> This is a distillation of the steps used to increment then decrement
> the stack pointer. Let's say that TOS is set to pattern 000001, and
Could someone explain to me how instructions are sequenced? Why is
the nop *before* the +? I would expect the sequence to go:
+ nop nop nop <instruction fetch>
or:
--- --- --- + <instruction fetch>
So that nops are required *after* the +, or an instruction fetch to allow
for carry prop. Thanks.
-Dave
