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ARM Instruction Set - 國立臺灣大學

ARM Instruction SetComputer Organization and Assembly Languages pgzyggYung-Yu Chuang with slides by Peng-Sheng ChenIntroduction The ARM processor is easy to program at the assembly level (It is a RISC)assembly level. (It is a RISC) We will learn ARM assembly programming at the ll d it il tuser level and run it on a programmer model The state of an ARM system is determined by the content of visible registers and memorythe content of visible registers and memory. A user-mode program can see 15 32-bit general- it (R0R14) t purpose registers (R0-R14), program counter (PC) and CPSR. Instruction set defines the operations that can change the system Memory is a linear array of bytes addressed from 0 to 000x00000000bytes addressed from 0 to 232-1Wd hlfd b t10200x000000010x00000002 Word, half-word, byte Little-endian30FF0x000000030x00000004 FFFF0x000000040x000000050x00000006000x00 0000060 FFFFFFFD00000xFFFFFFFE0xFFFFFFFD0xFFFFFF FFByte ordering Big EndianLeast significant byte has 000x00000000 Least significant byte has highest addressWord address 0x00000000 0010200x0000000

Instruction set defines the operations that can change the state. Memory system • Memory is a linear array of bytes addressed from 0 to 0x00000000 00 232-1 Wdf hl d bt 10 20 0x00000001 ... • See the reference manual (4 1 33)See the reference manual (4.1.33) Multiplication

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