RISC-V Interpreter

Input your RISC-V code here:

The most recent instructions will be shown here when stepping.

Features

Reset to load the code, Step one instruction, or Run all instructions
Set a breakpoint by clicking on the line number (only for Run)
View registers on the right, memory on the bottom of this page

Supported Instructions

lui

[lui, rd, ,, imm20]


    auipc

[auipc, rd, ,, imm20]


    addi

[addi, rd, ,, rs1, ,, imm]


    slti

[slti, rd, ,, rs1, ,, imm]


    sltiu

[sltiu, rd, ,, rs1, ,, imm]


    xori

[xori, rd, ,, rs1, ,, imm]

ori

[ori, rd, ,, rs1, ,, imm]


    andi

[andi, rd, ,, rs1, ,, imm]


    slli

[slli, rd, ,, rs1, ,, shamt]


    srli

[srli, rd, ,, rs1, ,, shamt]


    srai

[srai, rd, ,, rs1, ,, shamt]

add

[add, rd, ,, rs1, ,, rs2]

sub

[sub, rd, ,, rs1, ,, rs2]

sll

[sll, rd, ,, rs1, ,, rs2]

slt

[slt, rd, ,, rs1, ,, rs2]


    sltu

[sltu, rd, ,, rs1, ,, rs2]

xor

[xor, rd, ,, rs1, ,, rs2]

srl

[srl, rd, ,, rs1, ,, rs2]

sra

[sra, rd, ,, rs1, ,, rs2]

or

[or, rd, ,, rs1, ,, rs2]

and

[and, rd, ,, rs1, ,, rs2]


    fence

[fence, pred, ,, succ]


    fence.i

[fence.i]


    csrrw

[csrrw, rd, ,, offset, ,, rs1]


    csrrs

[csrrs, rd, ,, offset, ,, rs1]


    csrrc

[csrrc, rd, ,, offset, ,, rs1]


    csrrwi

[csrrwi, rd, ,, offset, ,, uimm]


    csrrsi

[csrrsi, rd, ,, offset, ,, uimm]


    csrrci

[csrrci, rd, ,, offset, ,, uimm]


    ecall

[ecall]


    ebreak

[ebreak]


    uret

[uret]


    sret

[sret]


    mret

[mret]

wfi

[wfi]


    sfence.vma

[sfence.vma, rs1, ,, rs2]

lb

[lb, rd, ,, offset, (, rs1, )]

lh

[lh, rd, ,, offset, (, rs1, )]

lw

[lw, rd, ,, offset, (, rs1, )]

lbu

[lbu, rd, ,, offset, (, rs1, )]

lhu

[lhu, rd, ,, offset, (, rs1, )]

sb

[sb, rs2, ,, offset, (, rs1, )]

sh

[sh, rs2, ,, offset, (, rs1, )]

sw

[sw, rs2, ,, offset, (, rs1, )]

jal

[jal, rd, ,, offset]


    jalr

[jalr, rd, ,, offset, (, rs1, )]

beq

[beq, rs1, ,, rs2, ,, offset]

bne

[bne, rs1, ,, rs2, ,, offset]

blt

[blt, rs1, ,, rs2, ,, offset]

bge

[bge, rs1, ,, rs2, ,, offset]


    bltu

[bltu, rs1, ,, rs2, ,, offset]


    bgeu

[bgeu, rs1, ,, rs2, ,, offset]


    addiw

[addiw, rd, ,, rs1, ,, imm]


    slliw

[slliw, rd, ,, rs1, ,, shamt]


    srliw

[srliw, rd, ,, rs1, ,, shamt]


    sraiw

[sraiw, rd, ,, rs1, ,, shamt]


    addw

[addw, rd, ,, rs1, ,, rs2]


    subw

[subw, rd, ,, rs1, ,, rs2]


    sllw

[sllw, rd, ,, rs1, ,, rs2]


    srlw

[srlw, rd, ,, rs1, ,, rs2]


    sraw

[sraw, rd, ,, rs1, ,, rs2]

lwu

[lwu, rd, ,, offset, (, rs1, )]

ld

[ld, rd, ,, offset, (, rs1, )]

sd

[sd, rs2, ,, offset, (, rs1, )]

Init Value	Register	Hex	Binary
0	x0 (zero)	0x0000000000000000	0b... 0b0000000000000000000000000000000000000000000000000000000000000000
	x1 (ra)	0x0000000000000000	0b... 0b0000000000000000000000000000000000000000000000000000000000000000
	x2 (sp)	0x0000000000000000	0b... 0b0000000000000000000000000000000000000000000000000000000000000000
	x3 (gp)	0x0000000000000000	0b... 0b0000000000000000000000000000000000000000000000000000000000000000
	x4 (tp)	0x0000000000000000	0b... 0b0000000000000000000000000000000000000000000000000000000000000000
	x5 (t0)	0x0000000000000000	0b... 0b0000000000000000000000000000000000000000000000000000000000000000
	x6 (t1)	0x0000000000000000	0b... 0b0000000000000000000000000000000000000000000000000000000000000000
	x7 (t2)	0x0000000000000000	0b... 0b0000000000000000000000000000000000000000000000000000000000000000
	x8 (s0, fp)	0x0000000000000000	0b... 0b0000000000000000000000000000000000000000000000000000000000000000
	x9 (s1)	0x0000000000000000	0b... 0b0000000000000000000000000000000000000000000000000000000000000000
	x10 (a0)	0x0000000000000000	0b... 0b0000000000000000000000000000000000000000000000000000000000000000
	x11 (a1)	0x0000000000000000	0b... 0b0000000000000000000000000000000000000000000000000000000000000000
	x12 (a2)	0x0000000000000000	0b... 0b0000000000000000000000000000000000000000000000000000000000000000
	x13 (a3)	0x0000000000000000	0b... 0b0000000000000000000000000000000000000000000000000000000000000000
	x14 (a4)	0x0000000000000000	0b... 0b0000000000000000000000000000000000000000000000000000000000000000
	x15 (a5)	0x0000000000000000	0b... 0b0000000000000000000000000000000000000000000000000000000000000000
	x16 (a6)	0x0000000000000000	0b... 0b0000000000000000000000000000000000000000000000000000000000000000
	x17 (a7)	0x0000000000000000	0b... 0b0000000000000000000000000000000000000000000000000000000000000000
	x18 (s2)	0x0000000000000000	0b... 0b0000000000000000000000000000000000000000000000000000000000000000
	x19 (s3)	0x0000000000000000	0b... 0b0000000000000000000000000000000000000000000000000000000000000000
	x20 (s4)	0x0000000000000000	0b... 0b0000000000000000000000000000000000000000000000000000000000000000
	x21 (s5)	0x0000000000000000	0b... 0b0000000000000000000000000000000000000000000000000000000000000000
	x22 (s6)	0x0000000000000000	0b... 0b0000000000000000000000000000000000000000000000000000000000000000
	x23 (s7)	0x0000000000000000	0b... 0b0000000000000000000000000000000000000000000000000000000000000000
	x24 (s8)	0x0000000000000000	0b... 0b0000000000000000000000000000000000000000000000000000000000000000
	x25 (s9)	0x0000000000000000	0b... 0b0000000000000000000000000000000000000000000000000000000000000000
	x26 (s10)	0x0000000000000000	0b... 0b0000000000000000000000000000000000000000000000000000000000000000
	x27 (s11)	0x0000000000000000	0b... 0b0000000000000000000000000000000000000000000000000000000000000000
	x28 (t3)	0x0000000000000000	0b... 0b0000000000000000000000000000000000000000000000000000000000000000
	x29 (t4)	0x0000000000000000	0b... 0b0000000000000000000000000000000000000000000000000000000000000000
	x30 (t5)	0x0000000000000000	0b... 0b0000000000000000000000000000000000000000000000000000000000000000
	x31 (t6)	0x0000000000000000	0b... 0b0000000000000000000000000000000000000000000000000000000000000000