MOV32 pseudo-instruction
Load a register with either a 32-bit immediate value or any address.
Syntax
MOV32{condRdexpr
where:
condis an optional condition code.
Rdis the register to be loaded.
Rdexprcan be any one of the following:
symbollabel in this or another program area.
#constantAny 32-bit immediate value.
symbol+constantA label plus a 32-bit immediate value.
Usage
MOV32 always generates two 32-bit instructions, a MOV,
MOVT pair. This enables you to load any 32-bit immediate, or to access
the whole 32-bit address space.
The main purposes of the MOV32 pseudo-instruction
are:
- To generate literal constants when an immediate value cannot be generated in a single instruction.
To load a PC-relative or external address into a register. The address remains valid regardless of where the linker places the ELF section containing the
MOV32.Note
An address loaded in this way is fixed at link time, so the code is not position-independent.
MOV32 sets the T32 bit (bit 0) of the
address if the label referenced is in T32 code.
Architectures
This pseudo-instruction is available in A32 and T32.
Examples
MOV32 r3, #0xABCDEF12 ; loads 0xABCDEF12 into R3
MOV32 r1, Trigger+12 ; loads the address that is 12 bytes
; higher than the address Trigger into R1