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

RSUBHNB: Rounding subtract narrow high part (bottom)

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

128-bit SVE

For each 64-bit integer set the even 32-bit elements of (3) to ( (1) − (2) + 0x80000000 ) >> 32, and zero odd elements.

256-bit SVE

For each 64-bit integer set the even 32-bit elements of (3) to ( (1) − (2) + 0x80000000 ) >> 32, and zero odd elements.

512-bit SVE

For each 64-bit integer set the even 32-bit elements of (3) to ( (1) − (2) + 0x80000000 ) >> 32, and zero odd elements.

Larger sizes

1024-bit SVE

For each 64-bit integer set the even 32-bit elements of (3) to ( (1) − (2) + 0x80000000 ) >> 32, and zero odd elements.

2048-bit SVE

For each 64-bit integer set the even 32-bit elements of (3) to ( (1) − (2) + 0x80000000 ) >> 32, and zero odd elements.

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