pcmpestri

Packed Compare Explicit Length Strings, Return Index

PCMPESTRI xmm1, xmm2/m128, imm8

Complex string search/compare; returns index in ECX.

Details

The Packed Compare Explicit Length Strings, Return Index instruction complex string search/compare; returns index in ECX.

Pseudocode Operation

// Complex string search/compare; returns index in ECX

Example

PCMPESTRI xmm1, xmm2/m128, 3

Encoding

Binary Layout
66
+0
0F
+1
3A
+2
61
+3
 
Format SSE4.2
Opcode 66 0F 3A 61
Extension SSE4.2

Operands

  • dest
    128-bit XMM SIMD register
  • src1
    128-bit XMM SIMD register or Memory operand
  • src2
    8-bit signed immediate