《ARM和Thumb-2指令集快速参考卡》ARM and Thumb-2 Instruction Set Quick Reference Card Key to Tables Rm {, } See Table Register, optionally shifted by constant See Table Flexible Operand 2. Shift and rotate are only available as part of Operand2. A comma-separated list of registers, enclosed in braces { and }. See Table PSR fields. As , must not include the PC. Either CPSR (Current Processor Status Register) or SPSR (Saved Processor Status Register) As , including the PC. C*, V* Flag is unpredictable in Architecture v4 and earlier, unchanged in Architecture v5 and later. +/- ……