Is it possible to tell the inline assembler to output something to the resulting assembler file even though it doesn't recognise the opcode?
Mailing lists / fpc-devel / 2012-07
Inline assembler.
4 messages · 3 people · –
- Jonas Maebe 2
- Konstantin 1
- peter green 1
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peter green wroteIs it possible to tell the inline assembler to output something to the resulting assembler file even though it doesn't recognise the opcode?
No. We used to have a "direct" assembler reader that allowed this, but that's incompatible with the concept of having an internal assembler and also in general just a hack.
Jonas
On 19 Jul 2012, at 23:54, peter green wrote: > Is it possible to tell the inline assembler to output something to the resulting assembler file even though it doesn't recognise the opcode? No. We used to have a "direct" assembler reader that allowed this, but that's incompatible with the concept of having an internal assembler and also in general just a hack.
An even dirtier hack would be entering machine code like this:
ASM
mov ax,dx
db $98,$90,$f8,$fc,
add eax,ecx
END;
With some more dirty hacks you can add addresses and other stuff to the machine code but this is probably not the way you want to go ;-).
Konstantin
Konstantin wrote 12 lines
Jonas Maebe schrieb:
> On 19 Jul 2012, at 23:54, peter green wrote:
>
>> Is it possible to tell the inline assembler to output something to the resulting assembler file even though it doesn't recognise the opcode?
> No. We used to have a "direct" assembler reader that allowed this, but that's incompatible with the concept of having an internal assembler and also in general just a hack.
An even dirtier hack would be entering machine code like this:
ASM
mov ax,dx
db $98,$90,$f8,$fc,
add eax,ecx
END;
That's actually cleaner, because this can be parsed by the assembler reader and be assembled correctly by the internal assembler.
Jonas