http://d.puremagic.com/issues/show_bug.cgi?id=1027

           Summary: "fadd real ptr [EAX];" does not compile
           Product: D
           Version: 1.007
          Platform: PC
        OS/Version: Windows
            Status: NEW
          Severity: major
          Priority: P1
         Component: DMD
        AssignedTo: bugzilla@digitalmars.com
        ReportedBy: clugdbug@yahoo.com.au


Works OK with  fld and fst, but fails for any two-operand instruction -- fadd,
fsub, fdiv, fmul, fcomp, etc.
They all work correctly with 'double ptr' and 'float ptr'.
(I suspect this is a side-effect of the ancient change from 'extended' to
'real').

This is a show-stopper for 80-bit vector operations :-(.

Also the ambiguous " fadd [EAX];"
compiles, but I'm not sure that it should -- which size does it use?

----------
bug.d(7): bad type/size of operands 'fadd'
----------

void main()
{
    real a = 3.0;
    asm {
        lea EAX, a;
        fld real ptr [EAX];  // ok
        fadd real ptr [EAX]; // bug
        fsub real ptr [EAX]; // bug
        fmul real ptr [EAX]; // bug
        fdiv real ptr [EAX]; // bug
        fcom real ptr [EAX]; // bug
        fucom real ptr [EAX]; // bug
        fstp st(0), st;
        fldz;
        fstp real ptr [EAX];  // ok
    }
    assert(a==0);
}


-- 

http://d.puremagic.com/issues/show_bug.cgi?id=1027


bugzilla@digitalmars.com changed:

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




------- Comment #1 from bugzilla@digitalmars.com  2007-03-06 05:14 -------
It shouldn't compile, as there is no such instruction! Adding (etc.) for 80 bit operands can only be done with ST registers.


-- 

d-bugmail@puremagic.com wrote:
> http://d.puremagic.com/issues/show_bug.cgi?id=1027
> 
> 
> bugzilla@digitalmars.com changed:
> 
>            What    |Removed                     |Added
> ----------------------------------------------------------------------------
>              Status|NEW                         |RESOLVED
>          Resolution|                            |INVALID
> 
> 
> 
> 
> ------- Comment #1 from bugzilla@digitalmars.com  2007-03-06 05:14 -------
> It shouldn't compile, as there is no such instruction! Adding (etc.) for 80 bit
> operands can only be done with ST registers.
> 
> 
Aargh! You're right. I'm a goose!
But on the other, minor point -- what operand size does
fadd [EAX];
use?