Hi all,
I would appreciate if somebody knows whether there is a way to specify, through the gcc extended inline assembly construct, a precise kind of registers.
To be more specific, I would like to indicate that the given instruction operand must be a SPARC output register.
e.g.
int var;
asm volatile("instructionname %1"
: /* no output */
: "xxx"(var)
: /* no clobbered regs */
);
In this case, I would like to find, if existing, the right constraint to use instead of xxx to ask the compiler to pick one of the o0 - o7 registers.
I state beforehand that I have read the related gcc documentation, unfortunately without finding anything related to my question. I think that gcc focuses strictly on the SPARC ABI compliance rather than allowing a wide range of customization to the inline assembly, but I hope I am wrong and there is a possibility to do this trick.
Thank you in advance,
J.
