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9. SOC Consortium Course Material. Data Size and Instruction set. ?ARM processor is a 32-bit architecture. ?Most ARM's implement two instruction sets. – 32-bit ARM instruction set. – 16-bit Thumb instruction set
ARM Instruction Set. Computer Organization and Assembly Languages p. g z. y g g. Yung-Yu Chuang with slides by Peng-Sheng Chen. Page 2. Introduction. • The ARM processor is easy to program at the assembly level (It is a RISC) assembly . R2 unchanged. Example: 1010 00 0011 0000. Before R2=0xA0000030.
cost applications. ? Mobile phones. ? Communication modems. ? Automotive engine management systems. ? Hand-held digital systems. ? This chapter introduces the ARM instruction sets based on the ARM7 processor. ? Different versions of ARM processors share the same basic machine instruction sets
4.5.6 TEQ, TST, CMP and CMN opcodes. Note. TEQ, TST, CMP and CMN do not write the result of their operation but do set flags in the CPSR. An assembler should always set the S flag for these instructions even if this is not specified in the mnemonic. The TEQP form of the TEQ instruction used in earlier ARM processors
If Z is set, the ADD will be skipped and the flags remain unaltered. Immediate operands. Immediate operands are written as a # followed by a number. For example, to increment R0, we would use: ADD R0, R0, #1. Now, as we know, an ARM instruction has 32 bits in which to encode the instruction type, condition, operands
8 Apr 2016 Instruction Set Architecture • Describes how processor processes instructions • Makes available instructions, binary codes, syntax, addressing modes, . Example of using 'BX' instruction ; ARM state codes CODE32 ; 32-bit instructions follow LDR r0,=tcode+1 ; address of tcode to r0, ; +1 to enter Thumb
McGraw-Hill Education. 1. ADVANCED PROCESSOR ARCHITECTURES ARM7 instruction set: Data Transfer. Instructions. Register-load a byte (LDRB). Register- byte store (STRB). Register Half Word store (STRH). [A word in ARM is of 32 bits]. Register-load Half Word and CS (carry bit set). • Example: MOVLT r3, #10.
4.5.6 TEQ, TST, CMP and CMN opcodes. Note. TEQ, TST, CMP and CMN do not write the result of their operation but do set flags in the CPSR. An assembler should always set the S flag for these instructions even if this is not specified in the mnemonic. The TEQP form of the TEQ instruction used in earlier ARM processors
The ARM processor has a powerful instruction set. But only a subset required to understand the examples in this tutorial will be discussed here. The ARM has a load store architecture, meaning that all arithmetic and logical instructions take only register operands. They cannot directly operate on operands to memory.
22 Aug 2008 Processor Modes. ? The ARM has six operating modes: – User (unprivileged mode under which most tasks run). – FIQ (entered when a high priority (fast) . EE382N-4 Embedded Systems Architecture. Logical Instruction. Arithmetic Instruction. Flag. Negative. No meaning. Bit 31 of the result has been set.
     

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