SVE Instruction List by Dougall Johnson
See "UXTB, UXTH, UXTW" in the exploration tools

UXTB: Unsigned byte extend (predicated)

UXTB Zd.S, Pg/M, Zn.S (SVE (SME
svuint32_t svextb[_u32]_m(svuint32_t inactive, svbool_t pg, svuint32_t op)

128-bit SVE

For each 32-bit value integer set (2) to ( (1) & 0xFF ). This takes the low 8-bits of (1), and zero-extends it to 32-bit.

256-bit SVE

For each 32-bit value integer set (2) to ( (1) & 0xFF ). This takes the low 8-bits of (1), and zero-extends it to 32-bit.

512-bit SVE

For each 32-bit value integer set (2) to ( (1) & 0xFF ). This takes the low 8-bits of (1), and zero-extends it to 32-bit.

Larger sizes

1024-bit SVE

For each 32-bit value integer set (2) to ( (1) & 0xFF ). This takes the low 8-bits of (1), and zero-extends it to 32-bit.

2048-bit SVE

For each 32-bit value integer set (2) to ( (1) & 0xFF ). This takes the low 8-bits of (1), and zero-extends it to 32-bit.

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