(movxf, tstxf, extendsfxf2, extenddfxf2): New patterns.

(truncxfdf2, truncxfsf2, floatsixf2, floathixf2, floatqixf2): Likewise.
(ftruncxf2, fixxfqi2, fixxfhi2, fixxfsi2): Likewise.
(addxf3, subxf3, mulxf3, divxf3, negxf2, absxf2, sqrtxf2): Likewise.

From-SVN: r3973