On Wed, 18 Apr 2018 15:56:11 +0100, Gareth's Downstairs Computer
 declaimed the following:

>On 18/04/2018 15:39, Dennis Lee Bieber wrote:
>> On Wed, 18 Apr 2018 09:46:30 +0100, Gareth's Downstairs Computer
>>  declaimed the following:
>>
>>> In the days of DEC minicomputers, one had a
>>> Programmer's Card which showed all the instructions
>>> in their binary form. (I've still a couple for
>>> the PDP11 in the archive somewhere)
>>>
>>> Is there such a summary available for the 64 bit
>>> instruction set of the Pi3's A53 processors?
>>>
>>  Other than a few pages in the spec-sheet -- unlikely...
>>
>>  ...   with the result that only the
>> compiler authors tend to need to know the target instruction set ...
>
>As I hinted elsewhere (?) in this thread, that's me!!  :-)
>
 And (in my world) they should be studying the detailed documentation to
find all the little things that improve code generation (at least if you're
working the 64-bit architecture you don't run into a mix of 32-bit and
thumb instructions  -- especially the conditional execution suffix on
each opcode vs thumb using a special opcode to conditionally execute up to
only four following opcodes /while still needing the suffix/). A pocket
card wouldn't be that useful for that. It might be useful for someone
having to peruse something from a code generator, but not for creating said
code generator.


--
 Wulfraed                 Dennis Lee Bieber         AF6VN
 wlfraed@ix.netcom.com    HTTP://wlfraed.home.netcom.com/

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