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

SHSUBR: Signed halving subtract reversed vectors

SHSUBR Zdn.D, Pg/M, Zdn.D, Zm.D (SVE2 (SME
svint64_t svhsubr[_s64]_m(svbool_t pg, svint64_t op1, svint64_t op2)

128-bit SVE

For each signed 64-bit integer set (3) to ( (2) − (1) ) >> 1.

256-bit SVE

For each signed 64-bit integer set (3) to ( (2) − (1) ) >> 1.

512-bit SVE

For each signed 64-bit integer set (3) to ( (2) − (1) ) >> 1.
Larger sizes

1024-bit SVE

For each signed 64-bit integer set (3) to ( (2) − (1) ) >> 1.

2048-bit SVE

For each signed 64-bit integer set (3) to ( (2) − (1) ) >> 1.
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Inspired by and based on the x86/x64 SIMD Instruction List by Daytime.