* Question
| What is the relationship between the ARM status register and the Thumb status register? |
* Answer
| The 1Thumb states R0 to R7 are the same as the ARM states R0 to R7.The 2Thumb state CPSR (without SPSR) is the same as the ARM state CPSR.The 3Thumb state SP is mapped to the ARM state Rl3.The 4Thumb state LR is mapped to the ARM state Rl4.The 5Thumb state PC is mapped to the ARM state Rl5 (PC). |
COMMENTS