ThumbstatevsARMstate

ARM有兩套指令集，一套是ARM，另一套是Thumb。Thumb的目地是要增加code的密度，Thumbinstructionset實作的是ARMinstructionset的子集，指令用了16bits ...,,Thumb-stater0-r7andARM-stater0-r7areidentical.Thumb-stateCPSRandSPSRsandARM-stateCPSRandSPSRsareidentical.Thumb-stateSPmapsontothe ...,ARMinstructionsare32bitswide.Thumbinstructionsare16or32-bitswide.TheARMinstructionsetisasetof32-bitinstructionsprov...

參考資訊如下
ARM Introduction - wdv4758h

ARM 有兩套指令集， 一套是ARM， 另一套是Thumb。 Thumb 的目地是要增加code 的密度， Thumb instruction set 實作的是ARM instruction set 的子集， 指令用了16 bits ...

ARM Instruction set (Part 3)

ARM7TDMI Technical Reference Manual r4p1

Thumb-state r0-r7 and ARM-state r0-r7 are identical. Thumb-state CPSR and SPSRs and ARM-state CPSR and SPSRs are identical. Thumb-state SP maps onto the ...

ARM, Thumb, and ThumbEE instruction sets

ARM instructions are 32 bits wide. Thumb instructions are 16 or 32-bits wide. The ARM instruction set is a set of 32-bit instructions providing a comprehensive ...

What is the difference between the ARM, Thumb and ...

2015年2月23日 — Both ARM and Thumb-2 support 8-bit immediates while ARM can rotate bits only to the right and only by even bits, while Thumb can do rotations to ...

ARM Thumb Instruction Set

The ARM contains only one instruction set: the 32-bit set. When it's operating in the Thumb state , the processor simply expands the smaller shorthand ...

What is the difference between an ARM and a Thumb ...

2023年2月3日 — ARM instructions are 32-bits wide, while Thumb instructions are 16-bits wide, making them more compact and efficient for memory-constrained ...

Thumb Instruction Set

The ARM instruction set is only active when the processor is in ARM state. Similarly the Thumb instruction set is only active when the processor is in Thumb ...