On 07/giu/2006, at 18:22, H. J. Lu wrote:

The x86 psABI is very old and doesn't cover XMM registers. I'd like to
update x86 Linux calling convention for XMM register usage. I am not
sure if I should update stack alignment requirement.

Maybe you'll want to check how this is handled in Darwin/x86, which requires 16-byte stack alignment because it is internally using XMM registers.

Cheers,
  Sandro

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