vtbl4_p8
SIMD ISA | Return Type | Name | Arguments | Instruction Group | |
---|---|---|---|---|---|
Neon | poly8x8_t | vtbl4_p8 | (poly8x8x4_t a, uint8x8_t idx) | Table lookup / Table lookup | |
Description Table vector Lookup. This instruction reads each value from the vector elements in the index source SIMD&FP register, uses each result as an index to perform a lookup in a table of bytes that is described by one to four source table SIMD&FP registers, places the lookup result in a vector, and writes the vector to the destination SIMD&FP register. If an index is out of range for the table, the result for that lookup is 0. If more than one source register is used to describe the table, the first source register describes the lowest bytes of the table. Results Vd.8B result This intrinsic compiles to the following instructions: TBL Argument Preparation a register: Vn.16Bidx Architectures v7, A32, A64 Operation
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