Load 2 single-precision (32-bit) floating-point elements from memory into the upper 2 elements of result, and copy the lower 2 elements from a to result. mem_addr does not need to be aligned on any particular boundary.
See Implementation
Load 2 single-precision (32-bit) floating-point elements from memory into the upper 2 elements of result, and copy the lower 2 elements from a to result. mem_addr does not need to be aligned on any particular boundary.