Commit [491b55] Maximize Restore History

Fix instruction encoding for XMM shifts with immediate count

x86 keeps getting more and more devious: the source/dest operand
is in the r/m field for these instructions, so REX.B must be set,
rather than REX.R, to access > xmm7. Intel's new documentation
seems clearer about these issues, at least.

Paul Khuong Paul Khuong 2013-06-18

changed src/compiler/x86-64/insts.lisp
src/compiler/x86-64/insts.lisp Diff Switch to side-by-side view
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