SVE Instruction List by Dougall Johnson
See "ST4B (scalar plus immediate)" in the exploration tools

ST4B (scalar plus immediate): Contiguous store four-byte structures from four vectors (immediate index)

ST4B { Zt1.B, Zt2.B, Zt3.B, Zt4.B }, Pg, [Xn{, #imm, MUL VL}] (SVE (SME
void svst4_vnum[_s8](svbool_t pg, int8_t *base, int64_t vnum, svint8x4_t data)
void svst4_vnum[_u8](svbool_t pg, uint8_t *base, int64_t vnum, svuint8x4_t data)

128-bit SVE

Interleave 8-bit elements from four consecutive registers (2), (3), (4), and (5), and store them to the memory operand (6). If the predicate bit from (1) corresponding to an element in (2), (3), (4), and (5) is zero, those four 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 four consecutive registers (2), (3), (4), and (5), and store them to the memory operand (6). If the predicate bit from (1) corresponding to an element in (2), (3), (4), and (5) is zero, those four 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 four consecutive registers (2), (3), (4), and (5), and store them to the memory operand (6). If the predicate bit from (1) corresponding to an element in (2), (3), (4), and (5) is zero, those four 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 four consecutive registers (2), (3), (4), and (5), and store them to the memory operand (6). If the predicate bit from (1) corresponding to an element in (2), (3), (4), and (5) is zero, those four 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 four consecutive registers (2), (3), (4), and (5), and store them to the memory operand (6). If the predicate bit from (1) corresponding to an element in (2), (3), (4), and (5) is zero, those four 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.