What is R0 arm?
What is R0 arm?
The Procedure Call Standard for the ARM Architecture defines how to use registers in subroutine calls. By convention, you use registers R0 to R3 to pass arguments to subroutines, and R0 to pass a result back to the callers.
What does PC mean in arm?
The Program Counter (PC) is accessed as PC (or R15). It is incremented by the size of the instruction executed (which is always four bytes in ARM state).
What does LDR mean in arm?
Memory Instructions: Load and Store (Part 4) | Azeria Labs. Memory Instructions: Load and Store. ARM uses a load-store model for memory access which means that only load/store (LDR and STR) instructions can access memory.
How many registers are there in ARM 7?
37 registers
ARM7TDMI has 37 registers (31 GPR and 6 SPR). All these designs use a Von Neumann architecture, thus the few versions containing a cache do not separate data and instruction caches.
What are Tdmi stands for ARM7TDMI?
TDMI may refer to: TD Management, Inc. ARM7TDMI (16 bit Thumb + JTAG Debug + fast Multiplier + enhanced ICE) ARM9TDMI.
What do arm subs do?
The SUB instruction subtracts the value of Operand2 or imm12 from the value in Rn . In certain circumstances, the assembler can substitute one instruction for another.
What is Mvn in arm?
The MVN instruction takes the value of Operand2 , performs a bitwise logical NOT operation on the value, and places the result into Rd . In certain circumstances, the assembler can substitute MVN for MOV , or MOV for MVN . See Instruction substitution for details.
