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

SEL (vectors): Conditionally select elements from two vectors

SEL Zd.D, Pv, Zn.D, Zm.D (SVE (SME
svfloat64_t svsel[_f64](svbool_t pg, svfloat64_t op1, svfloat64_t op2)
svint64_t svsel[_s64](svbool_t pg, svint64_t op1, svint64_t op2)
svuint64_t svsel[_u64](svbool_t pg, svuint64_t op1, svuint64_t op2)

128-bit SVE

For each 64-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 64-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 64-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 64-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 64-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.