pcmpistri

Packed Compare Implicit Length Strings, Return Index

PCMPISTRI xmm1, xmm2/m128, imm8

String search (null-terminated); returns index in ECX.

Details

The Packed Compare Implicit Length Strings, Return Index instruction string search (null-terminated); returns index in ECX.

Pseudocode Operation

// String search (null-terminated); returns index in ECX

Example

PCMPISTRI xmm1, xmm2/m128, 3

Encoding

Binary Layout
66
+0
0F
+1
3A
+2
63
+3
 
Format SSE4.2
Opcode 66 0F 3A 63
Extension SSE4.2

Operands

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