SVE Instruction List by Dougall Johnson
See "UMLALB (vectors)" in the exploration tools

UMLALB (vectors): Unsigned multiply-add long to accumulator (bottom)

UMLALB Zda.S, Zn.H, Zm.H (SVE2 (SME
svuint32_t svmlalb[_u32](svuint32_t op1, svuint16_t op2, svuint16_t op3)

128-bit SVE

For each even unsigned 16-bit integer calculate (1) * (2), and add that to the 32-bit integer from (3), then set (4) to the result.

256-bit SVE

For each even unsigned 16-bit integer calculate (1) * (2), and add that to the 32-bit integer from (3), then set (4) to the result.

512-bit SVE

For each even unsigned 16-bit integer calculate (1) * (2), and add that to the 32-bit integer from (3), then set (4) to the result.

Larger sizes

1024-bit SVE

For each even unsigned 16-bit integer calculate (1) * (2), and add that to the 32-bit integer from (3), then set (4) to the result.

2048-bit SVE

For each even unsigned 16-bit integer calculate (1) * (2), and add that to the 32-bit integer from (3), then set (4) to the result.

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