[Bug target/71677] PowerPC ISA 3.0 DImode load/store needs a fix

[meissner at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71677

--- Comment #3 from Michael Meissner <meissner at gcc dot gnu.org> ---
Author: meissner
Date: Thu Jun 30 21:54:47 2016
New Revision: 237898

URL: https://gcc.gnu.org/viewcvs?rev=237898&root=gcc&view=rev
Log:
2016-06-30  Michael Meissner  <meiss...@linux.vnet.ibm.com>

        PR target/71677
        * config/rs6000/constraints.md (wY constraint): New constraint to
        match the requirements for the LXSD and STXSD instructions.
        * config/rs6000/predicates.md (offsettable_mem_14bit_operand): New
        predicate to match the requirements for the LXSD and STXSD
        instructions.
        * config/rs6000/rs6000.md (mov<mode>_hardfloat32, FMOVE64 case):
        Use constaint wY for LXSD/STXSD instructions instead of 'o' or 'Y'
        to make sure that the bottom 2 bits of offset are 0, the address
        form is offsettable, and no updating is done in the address mode.
        (mov<mode>_hardfloat64, FMOVE64 case): Likewise.
        (movdi_internal32): Likewise
        (movdi_internal64): Likewise.


Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/config/rs6000/constraints.md
    trunk/gcc/config/rs6000/predicates.md
    trunk/gcc/config/rs6000/rs6000.md