Re: SSE ABI change proof for Jan's old patch

[Richard Henderson <rth at redhat dot com>]

On Mon, Dec 29, 2003 at 06:58:32PM -0500, Daniel Berlin wrote:
> This is SSE. arch=i686 doesn't support SSE, so you'd never be able to 
> compile the same code anyway.

You forget about our generalized vector support.

	typedef __attribute__((vector_size(16))) int v4si;

	v4si foo(v4si x, v4si y)
	{
	  return x + y;
	}

	void bar (v4si x, v4si y, v4si *p)
	{
	  *p = x + y;
	}

I do note that we already warn: 

z.c: In function `foo':
z.c:4: warning: SSE vector return without SSE enabled changes the ABI

so I suppose a similar warning for parameter passing would be
acceptable.


r~