Special instructions in inline assembler
Tue Dec 16 16:59:00 GMT 2003
Falk Hueffner <falk dot hueffner at student dot uni-tuebingen dot de> wrote:
> You can declare two fixed registers with something like
> register uint32_t r2 asm("r2");
> register uint32_t r3 asm("r3");
> and use them. Of course this will not be as efficient as if the
> compiler were to chose them itself, but at least you need no copying.
Thanks so much for your suggestion. I think this is sufficiently useful
that someone ought to add it to one of the inline assembler FAQ's. Several
other GCC hackers I asked hadn't seen this way of nailing down the registers.
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