Re: [PATCH] KVM: 'asm' operand has impossible constraints

From: Avi Kivity
Date: Sun Jan 28 2007 - 04:42:17 EST


PaweÅ Sikora wrote:
On Saturday 27 of January 2007 10:05:53 Avi Kivity wrote:

"g" appears to be equivalent to "rmi", if "i" is impossible, gcc is free
to use "r" or "m", no?

`r'
A register operand is allowed provided that it is in a general
register.
`g'
Any register, memory or immediate integer operand is allowed,
except for registers that are not general registers.

so, it looks like g == !r for registers ( not general vs. general regs ).

I read it as g == !!r for registers ("except" and "not" constitute a double negative).


--
error compiling committee.c: too many arguments to function

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