SVE Instruction List by Dougall Johnson
SQRSHLR: Signed saturating rounding shift left reversed vectors (predicated)
SQRSHLR Zdn.B, Pg/M, Zdn.B, Zm.B (SVE2 (SME
128-bit SVE
Shift each signed 8-bit integer from (2) by the corresponding signed 8-bit integer from (1), rounding if shifting right, with signed saturation to 0x7F or −0x80 on overflow, setting (3) to the result. If (2) ≥ 0, the result is (2) << (1), otherwise it is ( (2) + ( 1 << ( −(1) − 1 ) ) ) >> −(1).
256-bit SVE
Shift each signed 8-bit integer from (2) by the corresponding signed 8-bit integer from (1), rounding if shifting right, with signed saturation to 0x7F or −0x80 on overflow, setting (3) to the result. If (2) ≥ 0, the result is (2) << (1), otherwise it is ( (2) + ( 1 << ( −(1) − 1 ) ) ) >> −(1).
512-bit SVE
Shift each signed 8-bit integer from (2) by the corresponding signed 8-bit integer from (1), rounding if shifting right, with signed saturation to 0x7F or −0x80 on overflow, setting (3) to the result. If (2) ≥ 0, the result is (2) << (1), otherwise it is ( (2) + ( 1 << ( −(1) − 1 ) ) ) >> −(1).
Larger sizes
1024-bit SVE
Shift each signed 8-bit integer from (2) by the corresponding signed 8-bit integer from (1), rounding if shifting right, with signed saturation to 0x7F or −0x80 on overflow, setting (3) to the result. If (2) ≥ 0, the result is (2) << (1), otherwise it is ( (2) + ( 1 << ( −(1) − 1 ) ) ) >> −(1).
2048-bit SVE
Shift each signed 8-bit integer from (2) by the corresponding signed 8-bit integer from (1), rounding if shifting right, with signed saturation to 0x7F or −0x80 on overflow, setting (3) to the result. If (2) ≥ 0, the result is (2) << (1), otherwise it is ( (2) + ( 1 << ( −(1) − 1 ) ) ) >> −(1).
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Inspired by and based on the x86/x64 SIMD Instruction List by Daytime.