SVE Instruction List by Dougall Johnson
SQSHRUN: Signed saturating shift right narrow by immediate to interleaved unsigned integer
SQSHRUN Zd.B, { Zn1.H, Zn2.H }, #const (SVE2.3 (SME2.3
128-bit SVE
For each signed 16-bit integer element e from (1) and (2) compute e >> const, truncating to 8-bit with unsigned saturation to 0 (if e is negative) or 0xFF. 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). The shift amount is limited to 1 ≤ const ≤ 8.
256-bit SVE
For each signed 16-bit integer element e from (1) and (2) compute e >> const, truncating to 8-bit with unsigned saturation to 0 (if e is negative) or 0xFF. 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). The shift amount is limited to 1 ≤ const ≤ 8.
512-bit SVE
For each signed 16-bit integer element e from (1) and (2) compute e >> const, truncating to 8-bit with unsigned saturation to 0 (if e is negative) or 0xFF. 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). The shift amount is limited to 1 ≤ const ≤ 8.
Larger sizes
1024-bit SVE
For each signed 16-bit integer element e from (1) and (2) compute e >> const, truncating to 8-bit with unsigned saturation to 0 (if e is negative) or 0xFF. 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). The shift amount is limited to 1 ≤ const ≤ 8.
2048-bit SVE
For each signed 16-bit integer element e from (1) and (2) compute e >> const, truncating to 8-bit with unsigned saturation to 0 (if e is negative) or 0xFF. 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). The shift amount is limited to 1 ≤ const ≤ 8.
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Inspired by and based on the x86/x64 SIMD Instruction List by Daytime.