SVE Instruction List by Dougall Johnson
See "SEL (vectors)" in the exploration tools

SEL (vectors): Conditionally select elements from two vectors

SEL Zd.B, Pv, Zn.B, Zm.B (SVE (SME
svint8_t svsel[_s8](svbool_t pg, svint8_t op1, svint8_t op2)
svuint8_t svsel[_u8](svbool_t pg, svuint8_t op1, svuint8_t op2)

128-bit SVE

For each 8-bit value, if the corresponding predicate bit in (1) is set, set (4) to (2), otherwise set (4) to (3).

256-bit SVE

For each 8-bit value, if the corresponding predicate bit in (1) is set, set (4) to (2), otherwise set (4) to (3).

512-bit SVE

For each 8-bit value, if the corresponding predicate bit in (1) is set, set (4) to (2), otherwise set (4) to (3).

Larger sizes

1024-bit SVE

For each 8-bit value, if the corresponding predicate bit in (1) is set, set (4) to (2), otherwise set (4) to (3).

2048-bit SVE

For each 8-bit value, if the corresponding predicate bit in (1) is set, set (4) to (2), otherwise set (4) to (3).

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Inspired by and based on the x86/x64 SIMD Instruction List by Daytime.