SVE Instruction List by Dougall Johnson
See "ADDHNT" in the exploration tools

ADDHNT: Add narrow high part (top)

ADDHNT Zd.S, Zn.D, Zm.D (SVE2 (SME
svint32_t svaddhnt[_s64](svint32_t even, svint64_t op1, svint64_t op2)
svuint32_t svaddhnt[_u64](svuint32_t even, svuint64_t op1, svuint64_t op2)

128-bit SVE

For each 64-bit integer set the odd 32-bit elements of (3) to ( (1) + (2) ) >> 32, preserving even elements.

256-bit SVE

For each 64-bit integer set the odd 32-bit elements of (3) to ( (1) + (2) ) >> 32, preserving even elements.

512-bit SVE

For each 64-bit integer set the odd 32-bit elements of (3) to ( (1) + (2) ) >> 32, preserving even elements.

Larger sizes

1024-bit SVE

For each 64-bit integer set the odd 32-bit elements of (3) to ( (1) + (2) ) >> 32, preserving even elements.

2048-bit SVE

For each 64-bit integer set the odd 32-bit elements of (3) to ( (1) + (2) ) >> 32, preserving even elements.

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