Hello,

the following programm runs with dmd but didn't with gdc .

import tango.io.Stdout;

real sin(real x)
{
        asm {
                fld x;
                fsin;
                sahf;
                jnp Lret;
        }
        end:
                return real.nan;
        Lret:
                ;
}
void main() {
        real r = sin(1);
        Stdout(r);
}

hansen@hansen-lx:~/dd/tango$ rebuild fsin_gdc.d ./nmd_fsin_gdc.o: In function `_D8fsin_gdc3sinFeZe': fsin_gdc.d:(.text+0xe): undefined reference to `.LDASM1' collect2: ld returned 1 exit status

I think the problem is the "jnp Lret; command.


I also looked in Math.d for tangens from tango.

real tan(real x)
{
    version (GNU) {
        return tanl(x);
    } else {
    asm
    {
    fld x[EBP]          ; // load theta
    ...
They make a difference between dmd and gdc Compiler.
(In Phobos not)

Is a jump outside the asm block not possible with gdc?

Manfred

Manfred Hansen schrieb am 2007-06-05:
> Hello,
>
> the following programm runs with dmd but didn't with gdc .
> 
> import tango.io.Stdout;
>
> real sin(real x)
> {
>         asm {
>                 fld x;
>                 fsin;
>                 sahf;
>                 jnp Lret;
>         }
>         end:
>                 return real.nan;
>         Lret:
>                 ;
> }
> void main() {
>         real r = sin(1);
>         Stdout(r);
> }
>
> hansen@hansen-lx:~/dd/tango$ rebuild fsin_gdc.d ./nmd_fsin_gdc.o: In function `_D8fsin_gdc3sinFeZe': fsin_gdc.d:(.text+0xe): undefined reference to `.LDASM1' collect2: ld returned 1 exit status
>
> I think the problem is the "jnp Lret; command.

[snip]

> Is a jump outside the asm block not possible with gdc?

http://d.puremagic.com/issues/show_bug.cgi?id=747

Thomas

Thanks

Thomas Kuehne wrote:

> -----BEGIN PGP SIGNED MESSAGE-----
> Hash: SHA1
> 
> Manfred Hansen schrieb am 2007-06-05:
>> Hello,
>>
>> the following programm runs with dmd but didn't with gdc .
>> 
>> import tango.io.Stdout;
>>
>> real sin(real x)
>> {
>>         asm {
>>                 fld x;
>>                 fsin;
>>                 sahf;
>>                 jnp Lret;
>>         }
>>         end:
>>                 return real.nan;
>>         Lret:
>>                 ;
>> }
>> void main() {
>>         real r = sin(1);
>>         Stdout(r);
>> }
>>
>> hansen@hansen-lx:~/dd/tango$ rebuild fsin_gdc.d ./nmd_fsin_gdc.o: In function `_D8fsin_gdc3sinFeZe': fsin_gdc.d:(.text+0xe): undefined reference to `.LDASM1' collect2: ld returned 1 exit status
>>
>> I think the problem is the "jnp Lret; command.
> 
> [snip]
> 
>> Is a jump outside the asm block not possible with gdc?
> 
> http://d.puremagic.com/issues/show_bug.cgi?id=747
> 
> Thomas
> 
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