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From: mitchalsup@aol.com (MitchAlsup1)
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Subject: Re: Computer architects leaving Intel...
Date: Sun, 8 Sep 2024 00:23:38 +0000
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And just for fun::

On Fri, 6 Sep 2024 13:26:42 +0000, Anton Ertl wrote:
> Here we have the three variants:
>
> #include <limits.h>
>
> extern long foo1(long);
> extern long foo2(long);
>
> long bar(long a, long b)
> {
>   long c;
>   if (__builtin_sub_overflow(b,1,&c))
>     return foo1(a);
>   else
>     return foo2(a);
> }
>
> long bar2(long a, long b)
> {
>   if (b < b-1)
>     return foo1(a);
>   else
>     return foo2(a);
> }
>
> long bar3(long a, long b)
> {
>   if (b == LONG_MIN)
>     return foo1(a);
>   else
>     return foo2(a);
> }

My 66000:
    add    r3,R1,#-1   add  r3,r1,#-1         bepm  r1,.L4
    bge    R3,.L4      bge  r3,.L4
    8-bytes            8-bytes                4-bytes

I have a direct test for POSMAX in ISA that does not use a constant.