[yuubi]

In at least the ADT assembler and gas a few years back, the assembler provided syntactic sugar:

    ldr r0,=0x123456578

assembles to

    ldr r0,pc+xxx
    ... and then somewhere later ...
    .word 0x12345678

The assembler had some default places it would put constant pools (end of a module?), or you could explicitly tell it to generate a constant pool if the default place would be outside the limit of the pc-relative addressing mode.