ARM Architecture Reference Manual ARMv7-A and ARMv7-R edition

Assembler syntax
PLD Normal form
PLD [PC, #+/-] Alternative form
where:
Instruction Details
See Standard assembler syntax fields on page A8-7. An ARM PLD instruction must be
unconditional.
The label of the literal data item that is likely to be accessed in the near future. The
assembler calculates the required value of the offset from the Align(PC,4) value of this
instruction to the label. The offset must be in the range –4095 to 4095.
If the offset is zero or positive, imm32 is equal to the offset and add == TRUE.
If the offset is negative, imm32 is equal to minus the offset and add == FALSE.
+/- Is + or omitted to indicate that the immediate offset is added to the Align(PC,4) value
(add == TRUE), or – to indicate that the offset is to be subtracted (add == FALSE). Different
instructions are generated for #0 and #-0.
The immediate offset used to form the address. Values are in the range 0-4095.
The alternative syntax permits the addition or subtraction of the offset and the immediate offset to be
specified separately, including permitting a subtraction of 0 that cannot be specified using the normal
syntax. For more information, see Use of labels in UAL instruction syntax on page A4-5.
Operation
if ConditionPassed() then
EncodingSpecificOperations();
address = if add then (Align(PC,4) + imm32) else (Align(PC,4) - imm32);
Hint_PreloadData(address);
Exceptions
None.
ARM DDI 0406B Copyright © 1996-1998, 2000, 2004-2008 ARM Limited. All rights reserved. A8-239