SVE Instruction List by Dougall Johnson
See "ST2B (scalar plus immediate)" in the exploration tools

ST2B (scalar plus immediate): Contiguous store two-byte structures from two vectors (immediate index)

ST2B { Zt1.B, Zt2.B }, Pg, [Xn{, #imm, MUL VL}] (SVE (SME
void svst2_vnum[_s8](svbool_t pg, int8_t *base, int64_t vnum, svint8x2_t data)
void svst2_vnum[_u8](svbool_t pg, uint8_t *base, int64_t vnum, svuint8x2_t data)

128-bit SVE

Interleave 8-bit elements from two consecutive registers (2) and (3), and store them to the memory operand (4). If the predicate bit from (1) corresponding to an element in (2) and (3) is zero, those two contiguous stores are skipped, and cannot cause a fault, and the corresponding values in memory are unchanged.

256-bit SVE

Interleave 8-bit elements from two consecutive registers (2) and (3), and store them to the memory operand (4). If the predicate bit from (1) corresponding to an element in (2) and (3) is zero, those two contiguous stores are skipped, and cannot cause a fault, and the corresponding values in memory are unchanged.

512-bit SVE

Interleave 8-bit elements from two consecutive registers (2) and (3), and store them to the memory operand (4). If the predicate bit from (1) corresponding to an element in (2) and (3) is zero, those two contiguous stores are skipped, and cannot cause a fault, and the corresponding values in memory are unchanged.

Larger sizes

1024-bit SVE

Interleave 8-bit elements from two consecutive registers (2) and (3), and store them to the memory operand (4). If the predicate bit from (1) corresponding to an element in (2) and (3) is zero, those two contiguous stores are skipped, and cannot cause a fault, and the corresponding values in memory are unchanged.

2048-bit SVE

Interleave 8-bit elements from two consecutive registers (2) and (3), and store them to the memory operand (4). If the predicate bit from (1) corresponding to an element in (2) and (3) is zero, those two contiguous stores are skipped, and cannot cause a fault, and the corresponding values in memory are unchanged.

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