ARM Software reference manual

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Chapter 2 23.1 [Rn,#off] is a pre-indexing addressing mode Rn is the index register, modified by the 12-bit binary offset before it is used. The calculated address Rn+offset is only written back to Rn if the Wb bit is I. For example: Action: LOAD/STORE to/from the indexed address Then only if Wb=1: An
Instruction set 2.3.4 [Rn],Rm is a post-indexed addressing mode The index register is Rn, but in this case the offset is in register Rm, and may be optionally modified before it is used. As described in section 2.3.3, Rn takes on its new value after it has been used. For example: Action: LOAD/STORE to/from the address in Rn then always: Rn
Page 1: eference manual ARM Evaluation Syst
Page 4 and 5: 0 Copyright Acorn Computers Limited
Page 6 and 7: Contents 1. Architectural descripti
Page 9 and 10: 1. Architectural description 1.1 In
Page 11 and 12: The format of register 15 is as fol
Page 13 and 14: Value of mode bits 0 1 2 3 Architec
Page 15 and 16: 2. Instruction set There are fourte
Page 17 and 18: Instruction set In spite of the pre
Page 19 and 20: Instruction se! MOV causes the oper
Page 21 and 22: Instruction set ARM registers are l
Page 23 and 24: Instruction set The n most signific
Page 25 and 26: Eg: Mnemonic Rd,#&FF ; ■ 11111111
Page 27: Instruction set Any one of the 16 c
Page 31 and 32: Instruction set Any one of the 16 c
Page 33 and 34: Instruction set F and E refer to no
Page 35 and 36: 3. Interrupts Interrupts are channe
Page 37 and 38: When successfully aborted, the ARM
Page 39 and 40: Interrupts Return from SWI by trans
Page 41 and 42: Appendix A With the initial second-
Page 43 and 44: 6. Appendix C 6.1 Instruction set s
Page 45 and 46: 7. Appendix E 7.1 Notional stacking
Page 47 and 48: LDMEA Empty stack, Ascending. (uses

ARM Software reference manual

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