http://d.puremagic.com/issues/show_bug.cgi?id=474

           Summary: in ASM block last line can't be a label
           Product: D
           Version: 0.173
          Platform: PC
        OS/Version: Windows
            Status: NEW
          Severity: normal
          Priority: P2
         Component: DMD
        AssignedTo: bugzilla@digitalmars.com
        ReportedBy: davidl@126.com


asm
{
   jmp label1;
   mov EBX,EAX;
label1:
}

when i have label in the last line of my asm block would make the compiler fail to compiler it


and i wonder how can this kind of hack being done
asm
{
        mov label1, EAX;  //modify the code to get it run differently
label1: dw 00;
}

and also if i have a array item i want i can get the address directly
asm
{
       mov ax, myarray[1];
}


-- 

<d-bugmail@puremagic.com> wrote in message news:bug-474-3@http.d.puremagic.com/issues/...
> asm
> {
>   jmp label1;
>   mov EBX,EAX;
> label1:
> }
>
> when i have label in the last line of my asm block would make the compiler
> fail
> to compiler it

Just put a semicolon after the label.  The same thing applies with regular D code -- a label must be followed by a statement, even if it's the empty statement.

> and i wonder how can this kind of hack being done
> asm
> {
>        mov label1, EAX;  //modify the code to get it run differently
> label1: dw 00;
> }
>
> and also if i have a array item i want i can get the address directly
> asm
> {
>       mov ax, myarray[1];
> }

Those I can't help you with :\

d-bugmail@puremagic.com wrote:
> http://d.puremagic.com/issues/show_bug.cgi?id=474
> 
>            Summary: in ASM block last line can't be a label
>            Product: D
>            Version: 0.173
>           Platform: PC
>         OS/Version: Windows
>             Status: NEW
>           Severity: normal
>           Priority: P2
>          Component: DMD
>         AssignedTo: bugzilla@digitalmars.com
>         ReportedBy: davidl@126.com
> 
> 
> asm
> {
>    jmp label1;
>    mov EBX,EAX;
> label1:
> }
> 
> when i have label in the last line of my asm block would make the compiler fail
> to compiler it
> 
> 
> and i wonder how can this kind of hack being done
> asm
> {
>         mov label1, EAX;  //modify the code to get it run differently
> label1: dw 00;
> }

Or,
label: nop;

> and also if i have a array item i want i can get the address directly
> asm
> {
>        mov ax, myarray[1];
> }

I think you'd want "lea eax, myarray[1]".

L.

http://d.puremagic.com/issues/show_bug.cgi?id=474


davidl@126.com changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
            Summary|in ASM block last line can't|in ASM block last line can't
                   |be a label                  |be a label




------- Comment #2 from davidl@126.com  2006-11-03 01:18 -------
consider this
class
{
        int dynamicarray[];
        void method()
        {
             asm
             {
                    mov EAX,this;        //failed;
             }
             asm
             {
                    lea EAX, dynamicarray[0]; //without this this ain't gonna
work properly

             }

        }
}


and consider this in a func bar
void bar()
{
   int dynamicarray[];
   asm
   {
       lea EAX,dynamicarray[1];   //this won't tell the address IMHO

   }

}

and how to deal with dynamic array in ASM is  a pain in ass in D


-- 

http://d.puremagic.com/issues/show_bug.cgi?id=474


bugzilla@digitalmars.com changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|                            |INVALID




------- Comment #3 from bugzilla@digitalmars.com  2006-11-09 03:38 -------
This is the way it's supposed to work; a label is not a statement. To make it compile, add an empty statement:

asm
{
   jmp label1;
   mov EBX,EAX;
label1:
   ;    // <== add this
}

Labels outside of asm blocks work the same way.

Also, if there are separate issues, please list them as separate items in bugzilla.


-- 

http://d.puremagic.com/issues/show_bug.cgi?id=474





------- Comment #4 from bugzilla@digitalmars.com  2006-11-09 03:42 -------
int dynamicarray[];
asm
{
    mov EAX,dynamicarray;    // gets the length
    mov EAX,dynamicarray+4;  // gets pointer to the data
}


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