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Thumb states
Thumb States The Thumb States are a special memory space in the ARM RISC processor that allows the processor to execute multiple instructions concurrently....
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Thumb States The Thumb States are a special memory space in the ARM RISC processor that allows the processor to execute multiple instructions concurrently....
Thumb States
The Thumb States are a special memory space in the ARM RISC processor that allows the processor to execute multiple instructions concurrently. Each Thumb State corresponds to a specific set of functional registers, which are used to perform specific operations.
Thumb States are implemented using special instructions called Thumb-Up and Thumb-Down instructions. These instructions use the PC (Program Counter) to load the necessary registers from memory into the specified Thumb State.
There are four Thumb States, each with 16 registers. The Thumb State registers are organized as follows:
Thumb State 0: contains the most recently used register.
Thumb State 1: contains the second-most recently used register.
Thumb State 2: contains the third-most recently used register.
Thumb State 3: contains the fourth-most recently used register.
The Thumb States are used to improve the performance of ARM RISC processors by allowing the processor to execute multiple instructions at the same time. This is particularly useful when performing operations that require data from multiple memory locations