decb

SVE Decrement Scalar by Byte Count

DECB <Xdn>, <pattern> {, MUL #<imm>}

Decrements a register by the number of active bytes.

Details

The SVE Decrement Scalar by Byte Count instruction decrements a register by the number of active bytes.

Pseudocode Operation

// Decrements a register by the number of active bytes

Example

DECB Xdn, pattern

Encoding

Binary Layout
00000100
00
1
10001
pat
imm4
Xdn
 
Format SVE Inc/Dec
Opcode 0x04310000
Extension SVE

Operands

  • Xdn
    Register
  • pattern
    Predicate Pattern