RISC-V ISA Explorer · Vector Subsets (Zv/Zve)

Zvbb: Vector Bitmanip Base

Ratified 2023-09 · version 1.0.0

Bit-level operations on vector elements such as and-not, bit and byte reversal, zero counts, and rotations.

Typical use: Vectorized scalar Zbb ops

Open Zvbb in the explorer

Dependencies

Requires

Zvkb

Instructions (16)

Mnemonic	Name	Encoding	Match	Mask
`VANDN.VV`	Vector AND-NOT	`000001-----------000-----1010111`	`0x4000057`	`0xfc00707f`
`VANDN.VX`	Vector AND-NOT with scalar	`000001-----------100-----1010111`	`0x4004057`	`0xfc00707f`
`VBREV.V`	Vector bit reverse	`010010------01010010-----1010111`	`0x48052057`	`0xfc0ff07f`
`VBREV8.V`	Vector byte reverse within elements	`010010------01000010-----1010111`	`0x48042057`	`0xfc0ff07f`
`VCLZ.V`	Vector count leading zeros	`010010------01100010-----1010111`	`0x48062057`	`0xfc0ff07f`
`VCPOP.V`	Vector population count	`010010------01110010-----1010111`	`0x48072057`	`0xfc0ff07f`
`VCTZ.V`	Vector count trailing zeros	`010010------01101010-----1010111`	`0x4806a057`	`0xfc0ff07f`
`VREV8.V`	Vector byte reverse	`010010------01001010-----1010111`	`0x4804a057`	`0xfc0ff07f`
`VROL.VV`	Vector rotate left by vector	`010101-----------000-----1010111`	`0x54000057`	`0xfc00707f`
`VROL.VX`	Vector rotate left by scalar	`010101-----------100-----1010111`	`0x54004057`	`0xfc00707f`
`VROR.VI`	Vector rotate right by immediate	`01010------------011-----1010111`	`0x50003057`	`0xf800707f`
`VROR.VV`	Vector rotate right by vector	`010100-----------000-----1010111`	`0x50000057`	`0xfc00707f`
`VROR.VX`	Vector rotate right by scalar	`010100-----------100-----1010111`	`0x50004057`	`0xfc00707f`
`VWSLL.VI`	Vector widening shift left logical by immediate	`110101-----------011-----1010111`	`0xd4003057`	`0xfc00707f`
`VWSLL.VV`	Vector widening shift left logical by vector	`110101-----------000-----1010111`	`0xd4000057`	`0xfc00707f`
`VWSLL.VX`	Vector widening shift left logical by scalar	`110101-----------100-----1010111`	`0xd4004057`	`0xfc00707f`