SQRSHRNT

Signed saturating rounding shift right narrow by immediate (top)

Shift each signed integer value in the source vector elements right by an immediate value, and place the rounded results in the odd-numbered half-width destination elements, leaving the even-numbered elements unchanged. Each result element is saturated to the half-width N-bit element's signed integer range -2^(N-1) to (2^(N-1) )-1. The immediate shift amount is an unsigned value in the range 1 to number of bits per element. This instruction is unpredicated.

if !IsFeatureImplemented(FEAT_SVE2) && !IsFeatureImplemented(FEAT_SME) then UNDEFINED; constant bits(3) tsize = tszh:tszl; if tsize == '000' then UNDEFINED; constant integer esize = 8 << HighestSetBit(tsize); constant integer n = UInt(Zn); constant integer d = UInt(Zd); constant integer shift = (2 * esize) - UInt(tsize:imm3);