Couple other benchmark comparisons for wp-x86_64.pl.

# to 32-bit MMX version executed on same CPU. So why did I bother?

# Well, it's faster than gcc 3.3.2 generated code by over 50%, and

# over 80% faster than PathScale 1.4, an "ambitious" commercial

# compiler. What is it with x86_64 compilers? It's not the first

# example when they fail to generate more optimal code, when I

# believe they had *all* chances to...

# compiler. Furthermore it surpasses gcc 3.4.3 by 170% and Sun Studio

# 10 - by 360%[!]... What is it with x86_64 compilers? It's not the

# first example when they fail to generate more optimal code, when

# I believe they had *all* chances to...

#

# Note that register and stack frame layout are virtually identical

# to 32-bit MMX version, except that %r8-15 are used instead of