SVE Instruction List by Dougall Johnson
FCVTZSN: Floating-point narrowing convert to interleaved signed integer, rounding toward zero
FCVTZSN Zd.B, { Zn1.H, Zn2.H } (SVE2.3 (SME2.3
128-bit SVE

Convert each 16-bit float from (1) and (2) to a 8-bit signed integer, rounding toward zero. Set the even 8-bit elements of (3) to the results from (1), and the odd 8-bit elements of (3) to the results from (2).
256-bit SVE

Convert each 16-bit float from (1) and (2) to a 8-bit signed integer, rounding toward zero. Set the even 8-bit elements of (3) to the results from (1), and the odd 8-bit elements of (3) to the results from (2).
512-bit SVE

Convert each 16-bit float from (1) and (2) to a 8-bit signed integer, rounding toward zero. Set the even 8-bit elements of (3) to the results from (1), and the odd 8-bit elements of (3) to the results from (2).
Larger sizes
1024-bit SVE

Convert each 16-bit float from (1) and (2) to a 8-bit signed integer, rounding toward zero. Set the even 8-bit elements of (3) to the results from (1), and the odd 8-bit elements of (3) to the results from (2).
2048-bit SVE

Convert each 16-bit float from (1) and (2) to a 8-bit signed integer, rounding toward zero. Set the even 8-bit elements of (3) to the results from (1), and the odd 8-bit elements of (3) to the results from (2).
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Inspired by and based on the x86/x64 SIMD Instruction List by Daytime.