BEXTI

Bit Extract Immediate

BEXTI rd, rs1, imm

Extracts the value of a single bit (0 or 1) at the index specified by an immediate.

Details

BEXTI extracts the single bit of rs1 selected by the immediate, zero-extending to XLEN and writing to rd.

Pseudocode Operation

R[rd] = (R[rs1] >> imm) & 1;

Example

BEXTI x10, x11, 31

Encoding

Binary Layout
010010
31:26
shamtd
25:20
rs1
19:15
101
14:12
rd
11:7
0010011
6:0
 
Format I-Type
Opcode 0x48005013
Extension Zbs

Operands

  • rd
    Dest (0 or 1)
  • rs1
    Source
  • imm
    Index