Fast access to/from GPMC Enabled FPGA Memory

Hello.  I'm wondering if anyway has discovered a method to implement fast memcpy using load multiple/store multiple on an FPGA memory mapped as a GPMCdevice.  I've implemented a fast memcpy on the ARMv7 using load/store multiple like this:

loop:

    ldmia r1!, { r5-r8 } @load four registers
    stmia r0!, { r5-r8 } @store four registers

loop_test:
    cmp r4, #0
    subne r4, r4, #1
    bne loop

but in order to achieve this, the source/target access must be 32-bits.

Does anyone know of a way to implement multiple load/store on ARM using 16 bit accesses?