On Mon, 2004-10-11 at 17:04, Robert Snyder wrote:
> SSE was to help video and audio applications ( does this sound filimiar
> yet) Long story short best way to describe the functions of SSE is to
> say it took over for MMX..... While it more than simply MMX2 it tooks
> expanded on MMX and supposely the MMX2 project got merged into SSE and SSE2
Yeah. MMX was largely for 32-bit integer matrix operations. SSE was
basically 32-bit single precision floating point.
> SIMD <http://computing-dictionary.thefreedictionary.com/SIMD>
> instructions to handle 64-bit floating point numbers. SSE-2 was
> introduced with the Pentium 4.
To largely offset Intel actually having to completely redesign a new
IA-32 core. They try to off-load various 64-bit double-precision off of
the 2-issue FPU onto the, now in the P4, 2-issue SSE. The Pentium Pro
can only do either (2) ADD or (1) complex instruction.
But the SSE pipe is _not_ a FPU, it does _not_ have it accuracy.
If you want SSE performance with x87 accuracy, you _have_ to go Athlon.
Ironic, isn't it?
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