# LDR 不一定是 LDR ```cpp= LDR r0, =42 ; => MOV R0, #42 LDR r1, =0x55555555 ; => LDR R1, [PC, #offset to ; Literal Pool 1] LDR r2, =0xFFFFFFFF ; => MVN R2, #0 ``` offset 大小：32 bit 不能超過 4k，16 bit 不能超過 1k > http://infocenter.arm.com/help/topic/com.arm.doc.dui0801g/DUI0801G_armasm_user_guide.pdf > 6.8 Literal pools > 6.7 Load immediate values using LDR Rd, =const > 13.54 LDR pseudo-instruction