Replacing the PSHUFB Instruction

The Packed Shuffle Bytes (PSHUFB) instruction is used to look up data from the table in the target register by index.

PSHUFB xmm1, xmm2/m128

Shuffle bytes in xmm1 according to contents ofxmm2/m128.

The PSHUFB instruction is replaced with TBL on Arm.

TBL Vd.<T>, {Vn*.16B}, Vm.<T>

Table lookup (vector). Where <T> may be 8B or 16B, and Vn* is a list of between one and four consecutively numbered vector registers each holding sixteen 8-bit table elements. The list braces "{}" are concrete symbols, and do not indicate an optional field as elsewhere in this manual.