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Predeclared ARM Register Names

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By default, the assembler predeclares the following register names:

  • R0–R15 and r0–r15
  • c0–c15 coprocessor registers
  • p0–p15 coprocessor registers
  • a1-a4 scratch registers, synonymous with r0-r3
  • v1-v8 variable registers, synonymous with r4-r11
  • sb and SB stack base, synonymous with r9
  • sl and SL stack base, synonymous with r10
  • fp and FP frame pointer, synonymous with r11
  • ip and IP intra-procedure call scratch register, synonymous with r12
  • sp and SP stack pointer, synonymous with r13
  • lr and LR link register, synonymous with r14
  • pc and PC program counter, synonymous with r15

See Also

ARM Assembler | Built-in ARM Assembler Variables

 Last updated on Thursday, April 08, 2004

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