SVE Instruction List by Dougall Johnson
BGRP: Group bits to right or left as selected by bitmask
BGRP Zd.B, Zn.B, Zm.B (SVE2+BitPerm+NS
svuint8_t svbgrp[_u8](svuint8_t op1, svuint8_t op2)
128-bit SVE
Within each 8-bit lane, group bits from (1) at positions indicated by the non-zero bits from (2) into the least-significant bits of (3), and group bits from (1) at positions indicated by the zero bits from (2) into the most-significant bits of (3). The order of the bits is preserved.
256-bit SVE
Within each 8-bit lane, group bits from (1) at positions indicated by the non-zero bits from (2) into the least-significant bits of (3), and group bits from (1) at positions indicated by the zero bits from (2) into the most-significant bits of (3). The order of the bits is preserved.
512-bit SVE
Within each 8-bit lane, group bits from (1) at positions indicated by the non-zero bits from (2) into the least-significant bits of (3), and group bits from (1) at positions indicated by the zero bits from (2) into the most-significant bits of (3). The order of the bits is preserved.
Larger sizes
1024-bit SVE
Within each 8-bit lane, group bits from (1) at positions indicated by the non-zero bits from (2) into the least-significant bits of (3), and group bits from (1) at positions indicated by the zero bits from (2) into the most-significant bits of (3). The order of the bits is preserved.
2048-bit SVE
Within each 8-bit lane, group bits from (1) at positions indicated by the non-zero bits from (2) into the least-significant bits of (3), and group bits from (1) at positions indicated by the zero bits from (2) into the most-significant bits of (3). The order of the bits is preserved.
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Inspired by and based on the x86/x64 SIMD Instruction List by Daytime.