how to find the clock cycles using microblaze

Question

I'm a beginner with the Microblaze.

I just want to know how much clock cycles will use some instructions.

Variable s0 would be mapped to a register (in register file) x5, and s1 to x6; the assembly code would be

• load s0 from memory to register file (how many clock cycle it takes?)
• load s1 from memory to register file (how many clock cycle it takes?)
• do the logical AND (how many clock cycle it takes?)
• address calculation and store instruction (how many clock cycle it takes?)

Answer 1

load s0 from memory to register file (how many clock cycle it takes?)

load s1 from memory to register file (how many clock cycle it takes?)

address calculation and store instruction (how many clock cycle it takes?)

The lw, sw, and other similar assembly instructions have a latency that is dependent on how che Microblaze has been syntesized; they take

• 1 clock cycle when Microblaze is synthesized with the C_AREA_OPTIMIZED parameter to 0
• 2 clock cycles when C_AREA_OPTIMIZED=1

This assumes the use of local BRAM memory resources; if you are using a memory over another bus interface, you should add the memory bus latency.

do the logical AND (how many clock cycle it takes?)

The and, andi, andn, andni (and many other assembly instructions) take 1 clock cycle on the Microblaze.

In general, you know your assembler code: you should look at the Microblaze PDF documentation (a version for ISE 14.7 can be found here)