> "Richard" == Richard Henderson <[EMAIL PROTECTED]> writes:
Richard> On Tue, Aug 23, 2005 at 04:32:42PM -0400, Paul Koning wrote:
>> 1. Why do _builtin_ia32_paddusb and similar functions take signed
>> vector arguments, when the hardware primitive is defined to
>> operate on unsigned vect
On Tue, Aug 23, 2005 at 04:32:42PM -0400, Paul Koning wrote:
> 1. Why do _builtin_ia32_paddusb and similar functions take signed
>vector arguments, when the hardware primitive is defined to operate
>on unsigned vectors?
Because the interface you're actually supposed to be using
is _mm_adds
Two things I'm wondering about:
1. Why do _builtin_ia32_paddusb and similar functions take signed
vector arguments, when the hardware primitive is defined to operate
on unsigned vectors?
2. Why are there no sse equivalents of those functions, ones that
operate on 128 bit values (i.e., pa
