RISC-V Instruction encoding（Opcode, Funct3, Funct6/7）

Instruction encoding of RISC-V

I note Opcode, Funct 3, Funct 6/7 of each instruction type of RISC - V.

Format	Instruction	Opcode	Funct3	Funct6/7
R-type	add	0110011	000	0000000
	sub	0110011	000	0100000
	sll	0110011	001	0000000
	xor	0110011	100	0000000
	sri	0110011	101	0000000
	sra	0110011	101	0000000
	or	0110011	110	0000000
	and	0110011	111	0000000
	lr.d	0110011	011	0001000
	sc.d	0110011	011	0001100
I-type	lb	0000011	000	N/A
	lh	0000011	001	N/A
	lw	0000011	010	N/A
	ld	0000011	011	N/A
	lbu	0000011	100	N/A
	lhu	0000011	101	N/A
	lwu	0000011	110	N/A
	addi	0010011	000	N/A
	slli	0010011	001	000000
	xori	0010011	100	N/A
	srli	0010011	101	000000
	srai	0010011	101	010000
	ori	0010011	110	N/A
	andi	0010011	111	N/A
	jalr	1100111	000	N/A
S-type	sb	0100011	000	N/A
	sh	0100011	001	N/A
	sw	0100011	010	N/A
	sd	0100011	111	N/A
SB-type	beq	1100111	000	N/A
	bne	1100111	001	N/A
	blt	1100111	100	N/A
	bqe	1100111	101	N/A
	bltu	1100111	110	N/A
	bqeu	1100111	111	N/A
U-type	lui	0110111	N/A	N/A
UJ-type	jalr	1101111	N/A	N/A