* config/rs6000/rs6000.md (cmptf_internal1): Correct branch offset.
(UNSPEC_FIX_TRUNC_TF): New constant.
(movtf_internal): Make splitter active only when insn is active.
(extenddftf2): Rewrite to properly load zero into low part.
(extenddftf2_internal): New.
(extendsftf2): Rewrite.
(truncdftf2): Correct length.
(floatditf2): Delete.
(fix_trunc_helper): New.
(fix_trunctfdi2): Use fix_trunc_helper.
(fix_trunctfsi2): Likewise.fix_trunc
(fix_trunctfsi2_internal): New.