* config/arm/arm.c (arm_output_fldmx): Output FLDMD instead ofcsl/renesas/4.1-8

        FLDMX if target supports FLDMD.
        (vfp_output_fstmx): Output FSTMD instead of FSTMX if target supports
        FLDMD.
        (vfp_emit_fstmx): Don't leave space in the frame layout for the
        FSTMX format word if using FSTMD.
        (arm_get_vfp_saved_size): Don't add in space for the FSTMX format word
        if using FSTMD/FLDMD instead of FSTMX/FLDMX.
        (arm_output_epilogue): Adjust comment to reflect use of FSTMD.
        (arm_unwind_emit_sequence): Don't compensate for the FSTMX format
        word if emitting FSTMD.  Also emit "vsave" assembler directives in
        such cases rather than "save".
        * config/arm/libunwind.S (gnu_Unwind_Restore_VFP,
        gnu_Unwind_Save_VFP): Adjust comments.
        (gnu_Unwind_Restore_VFP_D, gnu_Unwind_Save_VFP_D): New functions
        for saving and restoring using FSTMD and FLDMD, rather than
        FSTMX and FLDMX.
        (gnu_Unwind_Restore_VFP_D_16_to_31, gnu_Unwind_Restore_VFP_D_16_to_31):
        New functions for saving and restoring the VFPv3 registers 16 .. 31.
        * config/arm/pr-support.c (gnu_unwind_execute): Add conditional
        compilation case to correctly handle unwind opcode 0xc8 when using
        VFP.
        * config/arm/unwind-arm.c (struct vfpv3_regs): New.
        (DEMAND_SAVE_VFP_D, DEMAND_SAVE_VFP_V3): New flags.
        (__gnu_Unwind_Save_VFP_D, __gnu_Unwind_Restore_VFP_D,
        __gnu_Unwind_Save_VFP_D_16_to_31, __gnu_Unwind_Restore_VFP_D_16_to_31):
        Declare.
        (restore_non_core_regs): Restore registers using FLDMD rather than
        FLDMX if required.  Also handle restoration of VFPv3 registers.
        (_Unwind_VRS_Pop): Handle saving and restoring of registers using
        FSTMD and FLDMD if required; also handle VFPv3 registers 16 .. 31,
        including cases where the caller specifies a range of registers
        that overlaps the d15/d16 boundary.
        * config/arm/arm.h (TARGET_FLDMX): New.


git-svn-id: https://gcc.gnu.org/svn/gcc/branches/csl/sourcerygxx-4_1@116239 138bc75d-0d04-0410-961f-82ee72b054a4

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