Ada asm

Ada asm

[ma740988]

Debated if I should post my question in comp.lang.c++ but opted for comp.lang.ada instead.  I'm perusing Ada code and I'm trying to determine the C++ equivalents for the following:


    asm'( ldf => "set_test_reg:");


    --
    -- Set System MFT Address Register located at 0x00AD)
    --
    asm'( ldf => "mtmft 0x00AD, r1"); 


I'm relatively new to Ada but I saw a link that describe the => as a positional notation.   It's not clear what the relationship between ldf and set_test_reg is.   I suspect ldf is passed into set_test_reg ..who knows.   I perused this guideline - link below but still unclear that the C++ equivalent might be.  Any help appreciated.

http://www.ibm.com/developerworks/rational/library/inline-assembly-c-cpp-guide/

Re: Ada asm

[Jeremiah]

On Friday, July 8, 2016 at 11:28:58 PM UTC-4, ma74...@gmail.com wrote:
> Debated if I should post my question in comp.lang.c++ but opted for comp.lang.ada instead.  I'm perusing Ada code and I'm trying to determine the C++ equivalents for the following:
> 
> 
>     asm'( ldf => "set_test_reg:");
> 
> 
>     --
>     -- Set System MFT Address Register located at 0x00AD)
>     --
>     asm'( ldf => "mtmft 0x00AD, r1"); 
> 
> 
> I'm relatively new to Ada but I saw a link that describe the => as a positional notation.   It's not clear what the relationship between ldf and set_test_reg is.   I suspect ldf is passed into set_test_reg ..who knows.   I perused this guideline - link below but still unclear that the C++ equivalent might be.  Any help appreciated.
> 
> http://www.ibm.com/developerworks/rational/library/inline-assembly-c-cpp-guide/

It looks like it is equivalent to basic inline assembly in GCC:
https://www.ibiblio.org/gferg/ldp/GCC-Inline-Assembly-HOWTO.html#s4

As opposed to extended assembly you have listed in the guide you posted

Re: Ada asm

[Jacob Sparre Andersen]

ma740988@gmail.com writes:

> Debated if I should post my question in comp.lang.c++ but opted for
> comp.lang.ada instead.  I'm perusing Ada code and I'm trying to
> determine the C++ equivalents for the following:
>
>     asm'( ldf => "set_test_reg:");
>
>     --
>     -- Set System MFT Address Register located at 0x00AD)
>     --
>     asm'( ldf => "mtmft 0x00AD, r1"); 

I don't know enough about C++ machine code insertion, but the Ada
definitions can be found in section 13.8 in the Ada Reference Manual,
and the implementation specifics for GCC can be found in the GNAT
Reference Manual
(https://gcc.gnu.org/onlinedocs/gnat_rm/Machine-Code-Insertions.html#Machine-Code-Insertions).

> I'm relatively new to Ada but I saw a link that describe the => as a
> positional notation.

That's a mistake.  Using "=>" is named notation.  Just listing values in
a comma-separated list is positional notation.

Greetings,

Jacob
-- 
Better save than sorry!