[fpc-devel] fpc - assembler reader: sizeof record or array

[fckama at freenet.de]

Hi Florian,

i add in Tx86Instructiones.AddReferenzeSizes a memory-size-checking for assembler sse- and avx-opcodes with
warnings if memory-reference is to small.

e.g. 

type
 TXMMDWord = record
 int0: dword;
 int1: dword;
 int2: dword;
 //int3: dword;
 end;

 TXMMDWord1 = record
 int0: dword;
 int1: dword;
 int2: dword;
 int3: dword;
 end;


var
 a: byte;
 b: TXMMDWord;
 c: TXMMDWord1; 


begin
 asm
 movdqa  xmm0, a  
 movdqa  xmm0, b
 movdqa  xmm0, c + $20
 end;
end;


a = opsize = S_B
b = opsize = S_NO
c = opsize = S_NO

a)
// in this time: fpc = ok 
// new: fpc warning "... size is 8 bits, expected 128 bits"

b)
// in this time: fpc = ok 
// new: fpc warning "... size is 96 bits, expected 128 bits"


c)

// in this time: fpc = ok 
// new: fpc warning "... size is 128 bits, expected 128 bits + offset 32 byte"


 


Torsten



> -----Ursprüngliche Nachricht-----
> Von: Florian Klämpfl 
> Gesendet: Mo. 02.04.2012 09:07
> An: FPC developers list 
> Betreff: Re: [fpc-devel] fpc - assembler reader: sizeof record or array
>
> Am 02.04.2012 06:50, schrieb Torsten:
>> Hi,
>>
>> i need the size of a global variable
> (type record).
>>
>> local var:
> "operands[i].opr.localsym.getsize"
>> global var: ???
>>
>> I can add a new field "globalsym" in
> the "TReference"-record ?
>>
>> What you say?
>
> Why do you need the size? At this point everything should be
> translated
> into S_* constants?
> _______________________________________________
> fpc-devel maillist  -  fpc-devel at lists.freepascal.org
> target="_blank">http://lists.freepascal.org/mailman/listinfo/fpc-devel
>
>
> -----Ursprüngliche Nachricht Ende-----




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