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Optimizing for SIMD Integer Applications 4
4-9
Figure 4-2 illustrates two values interleaved in the destination register,
and Example 4-4 shows code that uses the operation. The two signed
doublewords are used as source operands and the result is interleaved
signed words. The pack instructions can be performed with or without
saturation as needed.
Figure 4-1 PACKSSDW mm, mm/mm64 Instruction Example
Figure 4-2 Interleaved Pack with Saturation
OM15159
D C B A
D
1
C
1
B
1
A
1
mm/m64 mm
mm
OM15160
D C B A
D
1
B
1
C
1
A
1
MM/M64 mm
mm