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Re: Bug in x86-64 psABI or in gcc?
On 12/09/2009 06:56 AM, Michael Matz wrote:
>>
>> Aren't bits in the _Bool byte of"bar" specified by the psABI
>
> Right now they are specified in the psABI, you suggested to remove that
> specification.
>
The intent of H.J.'s proposal is to require bits <7:1> == 0 in all cases
(and higher bits as don't cares, the same way a char is passed), as
opposed to the current text which requires <63:1> == 0 when passed as
registers or on the stack (and <7:1> == 0 when stored in a memory
object.) Furthermore, the current psABI text is inconsistent for
arguments are return values; this is a bug in the wordsmithing of the
text rather than intentional, if I remember the original discussions
correctly.
-hpa
--
H. Peter Anvin, Intel Open Source Technology Center
I work for Intel. I don't speak on their behalf.