What is UDIV in ARM assembly?
UDIV performs an unsigned integer division of the value in Rn by the value in Rm . For both instructions, if the value in Rn is not divisible by the value in Rm , the result is rounded towards zero.
What is the instruction set used by ARM Cortex-M3?
Cortex-M3 instructions. The processor implements the ARMv7-M Thumb instruction set.
What is LDR Assembly?
The LDR Rd,= label pseudo-instruction places an address in a literal pool and then loads the address into a register. LDR Rd,= label can load any 32-bit numeric value into a register. It also accepts PC-relative expressions such as labels, and labels with offsets.
How does STR work Assembly?
STR instructions store a register value into memory. The memory address to load from or store to is at an offset from the register Rn . The offset is specified by the register Rm and can be shifted left by up to 3 bits using LSL . The value to load or store can be a byte, halfword, or word.
How does MUL work in ARM assembly?
The MUL instruction multiplies the values from Rm and Rs , and places the least significant 32 bits of the result in Rd . The MLA instruction multiplies the values from Rm and Rs , adds the value from Rn , and places the least significant 32 bits of the result in Rd .
How do you find the remainder of a number in ALP?
DIV or IDIV takes only one operand where it divides a certain register with this operand, the operand can be register or memory location only. When operand is a byte: AL = AL / operand, AH = remainder (modulus). when operand is a word: AX = (AX) / operand, DX = remainder (modulus).
Is ARM Cortex-M3 microcontroller or microprocessor?
Arm® Cortex®-M3 in a nutshell. The 32-bit Arm® Cortex®-M3 core processor is designed for high-performance, real-time processing in cost-constrained applications and can handle complex tasks. Any Arm® Cortex®-M3 microcontroller offers high scalability combined with an optimal trade-off between performance and cost.
What is the difference between LDR AND MOV?
After it is assembled, yes, absolutely the ldr is a memory access operation and mov is a register operation.
What is Strb assembly?
Store Register Byte (register) calculates an address from a base register value and an offset register value, and stores a byte from a register to memory. The offset register value can optionally be shifted.
What is the difference between LDR AND STR?
Generally, LDR is used to load something from memory into a register, and STR is used to store something from a register to a memory address.
What is the difference between MUL AND Imul?
The MUL instruction multiplies unsigned numbers. IMUL multiplies signed numbers. For both instructions, one factor must be in the accumulator register (AL for 8-bit numbers, AX for 16-bit numbers, EAX for 32-bit numbers). The other factor can be in any single register or memory operand.
What is SHR in assembly?
The SHR (shift right) instruction performs a logical right shift on the destination operand. The highest bit position is filled with a zero.
What is the ARM Cortex M3?
The ARM Cortex M3 is designed in a such way to enhance debug features and a higher level of system integration. It clocks at a CPU frequency of 100 MHz, and incorporates a 3-stage pipeline and uses a Harvard architecture with separate local instruction and data buses for third bus peripherals.
What is the CPU frequency of the ARM Cortex-M3?
It clocks at a CPU frequency of 100 MHz, and incorporates a 3-stage pipeline and uses a Harvard architecture with separate local instruction and data buses for third bus peripherals. The ARM Cortex- M3 CPU have an internal pre-fetch unit to support speculative branching.
What are the key features of the Cortex-M3?
Achieve more with Cortex-M3, which features exceptional 32-bit performance with low dynamic power. It also delivers leading system energy efficiency, thanks to integrated software-controlled sleep modes, extensive clock gating, and optional state retention.
What is the pre-fetch unit in the ARM Cortex-M3?
The ARM Cortex- M3 CPU have an internal pre-fetch unit to support speculative branching.