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From: "Chris M. Thomasson" <chris.m.thomasson.1@gmail.com>
Newsgroups: comp.lang.c,comp.lang.c++
Subject: Re: Can someone please verify the execution trace of this?
Date: Mon, 20 May 2024 13:38:07 -0700
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On 5/20/2024 1:36 PM, olcott wrote:
> On 5/20/2024 3:32 PM, Chris M. Thomasson wrote:
>> On 5/20/2024 1:31 PM, Chris M. Thomasson wrote:
>>> On 5/20/2024 1:30 PM, olcott wrote:
>>>> On 5/20/2024 3:19 PM, Chris M. Thomasson wrote:
>>>>> On 5/20/2024 1:10 PM, olcott wrote:
>>>>>> On 5/20/2024 3:04 PM, Chris M. Thomasson wrote:
>> [...]
>>>>> So, you created a simulator for x86? 32-bit I am assuming. Fwiw, I 
>>>>> am interested on how you simulate the cmpxchg8b and/or the 
>>>>> cmpxchg16b functions?
>>>>>
>>>>
>>>> I use libx86emu providing an interface so that any C function
>>>> can simulate any other C function in debug step mode. The
>>>> original H can even simulated itself simulating P.
>>>
>>> Can you show me a sample H? Is H a little program?
>> [...]
>>
>> I notice this:
>>
>>
>> typedef int (*ptr)();  // ptr is pointer to int function
>> 00 int H(ptr p, ptr i);
>> 01 int D(ptr p)
>> 02 {
>> 03   int Halt_Status = H(p, p);
>> 04   if (Halt_Status)
>> 05     HERE: goto HERE;
>> 06   return Halt_Status;
>> 07 }
>> 08
>> 09 int main()
>> 10 {
>> 11   H(D,D);
>> 12   return 0;
>> 13 }
>>
>> But, where is H?
>>
> 
> *IF YOU NEED TO RE0READ THIS 500 TIMES TO GET IT PLEASE DO*
> *IF YOU NEED TO RE0READ THIS 500 TIMES TO GET IT PLEASE DO*
> *IF YOU NEED TO RE0READ THIS 500 TIMES TO GET IT PLEASE DO*

I still cannot find even a simple example definition of H.

> 
> Every element of an infinite set of H/D pairs matching the above
> template where H correctly simulates 1 to ∞ steps of D thus including
> 0 to ∞ recursive simulations of H simulating itself simulating D.
> *D correctly simulated by H never reaches its own line 06 and halts*
>