http://bugs.winehq.org/show_bug.cgi?id=7284
--- Comment #34 from H. Verbeet hverbeet@gmail.com 2009-03-29 07:38:57 --- FWIW, I think clamping makes sense for 1.x pshaders. Shader constants for example are clamped there as well, and it'd be consistent with the hardware capabilities at the time.