Re: What exactly is our CRC algorithm? - Mailing list pgsql-hackers

At 2014-12-29 18:44:18 +0530, ams@2ndQuadrant.com wrote:
>
> > > +#ifdef __GNUC__
> > > +    __asm__ ("crc32b %[data], %[crc]\n" : [crc] "+r" (crc) : [data] "rm" (data));
> > 
> > Have you checked which version of gcc introduced named references to
> > input/output parameters?

OK, here we go:
   «As of GCC version 3.1, it is also possible to specify input and   output operands using symbolic names which can be
referencedwithin   the assembler code.»
 

GCC 3.1 was released on May 15, 2002. So it should be quite safe to use
this feature.

-- Abhijit