SSE3 Instruction Set Architecture (ISA) Extension

SSE3 instructions added with the Pentium 4 processors:

• LDDQU
  Load Unaligned Integer 128 Bits

SSE3 Floating-Point (FP) instructions added with the Pentium 4 processors:

• FISTTP
  Store Integer with Truncation

SSE3 SIMD Floating-Point (FP) instructions added with the Pentium 4 processors:

• ADDSUBPD
  Packed Double-FP Add/Subtract
• ADDSUBPS
  Packed Single-FP Add/Subtract
• HADDPD
  Packed Double-FP Horizontal Add
• HADDPS
  Packed Single-FP Horizontal Add
• HSUBPD
  Packed Double-FP Horizontal Subtract
• HSUBPS
  Packed Single-FP Horizontal Subtract
• MOVDDUP
  Move One Double-FP and Duplicate
• MOVSHDUP
  Move Packed Single-FP High and Duplicate
• MOVSLDUP
  Move Packed Single-FP Low and Duplicate