[fpc-pascal] FPC ARM inline Assembler

[Vern]

Works now!

Many Thanks
Vern

On 06/04/2023 1:43 p.m., Jonas Maebe via fpc-pascal wrote:
> On 06/04/2023 19:06, Vern via fpc-pascal wrote:
>> .......... the ARM version fails (similar code : ignore the fact it 
>> is the reverse of BSR) ... what am I missing ?
>>
>> procedure MSBitTest ( DataIn : longword);
>> var
>>   MSBit : longword;
>>
>> begin
>>   asm
>>    clz w4 , DataIn
>>    mov MsBit , w4
>>   end;
>> end;
>
> ARM is a load/store architecture, which means it only supports 
> operations on values loaded in registers. Local variables are always 
> allocated on the stack in procedures/functions with inline assembler 
> blocks, so you need to use the "str" instruction to store w4 into 
> MsBit. "mov" only works for register-register transfers on ARM.
>
>
> Jonas
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