COMPACT: Copy Active vector elements to lower-numbered elements

COMPACT Zd.H, Pg, Zn.H (SVE2.2+NS (SME2.2

128-bit SVE

Select the 16-bit lanes from (1) where the corresponding predicate bit in (2) is set, and pack them into low lanes of (3), preserving their order, zeroing any high lanes.

256-bit SVE

Select the 16-bit lanes from (1) where the corresponding predicate bit in (2) is set, and pack them into low lanes of (3), preserving their order, zeroing any high lanes.

512-bit SVE

Select the 16-bit lanes from (1) where the corresponding predicate bit in (2) is set, and pack them into low lanes of (3), preserving their order, zeroing any high lanes.

Larger sizes

1024-bit SVE

Select the 16-bit lanes from (1) where the corresponding predicate bit in (2) is set, and pack them into low lanes of (3), preserving their order, zeroing any high lanes.

2048-bit SVE

Select the 16-bit lanes from (1) where the corresponding predicate bit in (2) is set, and pack them into low lanes of (3), preserving their order, zeroing any high lanes.

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