SVE Instruction List by Dougall Johnson
SMAXQV: Signed maximum reduction of quadword vector segments
SMAXQV Vd.8H, Pg, Zn.H (SVE2.1 (SME2.1
128-bit SVE

Take the minimum across corresponding active signed 16-bit integer elements from each 128-bit segment of (1), storing the result in (3). For any element where the corresponding predicate bit in (2) is 0, interpret it as −0x8000.
256-bit SVE

Take the minimum across corresponding active signed 16-bit integer elements from each 128-bit segment of (1), storing the result in (3). For any element where the corresponding predicate bit in (2) is 0, interpret it as −0x8000.
512-bit SVE

Take the minimum across corresponding active signed 16-bit integer elements from each 128-bit segment of (1), storing the result in (3). For any element where the corresponding predicate bit in (2) is 0, interpret it as −0x8000.
Larger sizes
1024-bit SVE

Take the minimum across corresponding active signed 16-bit integer elements from each 128-bit segment of (1), storing the result in (3). For any element where the corresponding predicate bit in (2) is 0, interpret it as −0x8000.
2048-bit SVE

Take the minimum across corresponding active signed 16-bit integer elements from each 128-bit segment of (1), storing the result in (3). For any element where the corresponding predicate bit in (2) is 0, interpret it as −0x8000.
Report mistakes or give feedback
Inspired by and based on the x86/x64 SIMD Instruction List by Daytime.