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

RSUBHNT: Rounding subtract narrow high part (top)

RSUBHNT Zd.B, Zn.H, Zm.H (SVE2 (SME
svint8_t svrsubhnt[_s16](svint8_t even, svint16_t op1, svint16_t op2)
svuint8_t svrsubhnt[_u16](svuint8_t even, svuint16_t op1, svuint16_t op2)

128-bit SVE

For each 16-bit integer set the odd 8-bit elements of (3) to ( (1) − (2) + 0x80 ) >> 8, preserving even elements.

256-bit SVE

For each 16-bit integer set the odd 8-bit elements of (3) to ( (1) − (2) + 0x80 ) >> 8, preserving even elements.

512-bit SVE

For each 16-bit integer set the odd 8-bit elements of (3) to ( (1) − (2) + 0x80 ) >> 8, preserving even elements.
Larger sizes

1024-bit SVE

For each 16-bit integer set the odd 8-bit elements of (3) to ( (1) − (2) + 0x80 ) >> 8, preserving even elements.

2048-bit SVE

For each 16-bit integer set the odd 8-bit elements of (3) to ( (1) − (2) + 0x80 ) >> 8, preserving even elements.
Report mistakes or give feedback
Inspired by and based on the x86/x64 SIMD Instruction List by Daytime.