[Bug target/52607] v4df __builtin_shuffle with {0,2,1,3} or {1,3,0,2}

[marc.glisse at normalesup dot org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52607

--- Comment #1 from Marc Glisse <marc.glisse at normalesup dot org> 2012-03-17 01:05:57 UTC ---
Note that {1,2,0,3} seems harder, I need one extra vpermilpd. Actually, it
looks like every v4df shuffle can be realized as a vblendpd of a vpermilpd and
a vpermilpd+vperm2f128. For v8sf, it also seems true but may require the
version of vpermilps that takes its controls from a register/memory.