Mar 27, 2013 · I've googled BEQ and I have found it means branch on result zero, but I still don't really understand what it does. Does it compare the result of the last instruction to 0, and if it is 0, it goes back to the LOOP line?

It uses the Euclid algorithm for the Greatest Common Divisor (gcd) to demonstrate how conditional instructions improve code size and speed. In C the gcd algorithm can be expressed as: while (a != b) if (a > b) a = a - b; else. b = b - a; return a;

Jul 8, 2018 · I'm having some issues understanding the order of instructions in this code. Let's say beqz is true and it branches to the label next, does the program end there or does label next2 also execute? Since there is no syscall to end the program. add $t0,$t1,$t2 beqz $t0, next b next2 addi $t0,$t0,2 next: addi $t2,$t0,3 next2: addi $t1,$t1,2

The beq command is at address 1004, but by the time the command is being executed the PC has already been incremented to 1008. So, we calculate the offset from the PC to the desired label (which is at address 1028 ) as (1028 - 1008) = 20 .

本文主要讨论ARM指令中的beq和bnq指令。先介绍了ARM指令基本格式，指出beq、bnq等指令是opcode指令助记符b和cond指令条件的结合，还提及b指令使用方法和cond指令条件信息，涉及CPSR寄存器，最后通过示例解析beq和bnq指令。

Mar 19, 2024 · This RISC-V assembler post covers branch and set instructions, such as beq, bltu, bgez, and slt. We’ll also cover the zero register, program counter, condition codes, and multi-word addition.

Aug 25, 2016 · There are 4 instructions from instruction 1 and NEXT, so the format for beq is now: op | rs | rd | 16-bit constant or address 000100 | 01011 | 01101 | 0000 0000 0001 0000 Where rs is $t3 and rd is $t5.

Use beq and bne, just as for conditional statements, and add the j instruction. # Initialize loop variable, e.g., i = 0 . beq/bne ... # branch based on loop condition. # do something (body of loop) # step to make next iteration different, e.g., i++ . j loop. endLoop: # is there more to do here? Assume that R is an array of int.

It demonstrates how you can use conditional execution to improve code density and execution speed. The detailed analysis of execution speed only applies to an ARM7 processor. The code density calculations apply to all ARM processors. In C the algorithm can be expressed as: while (a != b) if (a > b) a = a - b; else b = b - a; . return a; .

Jan 6, 2020 · BEQ (short for "Branch if EQual") is the mnemonic for a machine language instruction which branches, or "jumps", to the address specified if, and only if the zero flag is set. If the zero flag is clear when the CPU encounters a BEQ instruction, the CPU will continue at the instruction following the BEQ rather than taking the jump.