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

SEL (predicates): Conditionally select elements from two predicates

SEL Pd.B, Pg, Pn.B, Pm.B (SVE (SME
svbool_t svsel[_b](svbool_t pg, svbool_t op1, svbool_t op2)

128-bit SVE

For each bit, if (1) is non-zero, set (4) to (2), otherwise, set (4) to (1).

256-bit SVE

For each bit, if (1) is non-zero, set (4) to (2), otherwise, set (4) to (1).

512-bit SVE

For each bit, if (1) is non-zero, set (4) to (2), otherwise, set (4) to (1).

Larger sizes

1024-bit SVE

For each bit, if (1) is non-zero, set (4) to (2), otherwise, set (4) to (1).

2048-bit SVE

For each bit, if (1) is non-zero, set (4) to (2), otherwise, set (4) to (1).

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