See "UMULLB (indexed)" in the exploration tools

UMULLB (indexed): Unsigned multiply long (bottom, indexed)

UMULLB Zd.D, Zn.S, Zm.S[imm] (SVE2 (SME

svuint64_t svmullb_lane[_u64](svuint32_t op1, svuint32_t op2, uint64_t imm_index)

128-bit SVE

Within each 128-bit segment, for each even unsigned 32-bit integer from (2), set the double-width (3) to (2) multiplied by the element from (1) specified by imm.

256-bit SVE

Within each 128-bit segment, for each even unsigned 32-bit integer from (2), set the double-width (3) to (2) multiplied by the element from (1) specified by imm.

512-bit SVE

Within each 128-bit segment, for each even unsigned 32-bit integer from (2), set the double-width (3) to (2) multiplied by the element from (1) specified by imm.

Larger sizes

1024-bit SVE

Within each 128-bit segment, for each even unsigned 32-bit integer from (2), set the double-width (3) to (2) multiplied by the element from (1) specified by imm.

2048-bit SVE

Within each 128-bit segment, for each even unsigned 32-bit integer from (2), set the double-width (3) to (2) multiplied by the element from (1) specified by imm.

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