Small Vectors Proposal

[Chad J]

Another thing I realized it would be nice to have is some intrinsic 
functions.

Here are some things I can think of off hand:

/// Saturated componentwise addition of two vectors.
adds( T vector1, T vector2 );

/// Multiply Add.
madd( T vector1, T vector2 );

/// Shifts all bits in "vector" right or left, respectively.
shiftr( T vector );
shiftl( T vector );

/** Comparison routines that return masks.
     Compare the operands in the appropriate way.  If the comparison is
       true for a particular set of components, the resulting component
       will be filled with all 1's, otherwise it will be filled with all
       0's.
     These should be hardware defined CPUs with SSEs and MMX, which are
       used on most desktops today and probably for a looong time.
*/
compareLess( T vector1, T vector2 ); // returns vector1 < vector2
compareLessEquals( T vector1, T vector2 ); // returns vector1 <= vector2
compareGreater( T vector1, T vector2 ); // returns vector1 > vector2
... (you get the idea)


I'm looking forward to some slick SIMD support in D!  I'm getting 
excited just to see this considered.  *stoked*

Oh and speaking of intrinsics, std.intrinsics is lacking the kinda 
obvious rotate left and rotate right (rol/ror) :(