SQRSHRUNB

Signed saturating rounding shift right unsigned narrow by immediate (bottom)

Shift each signed integer value in the source vector elements right by an immediate value, and place the rounded results in the even-numbered half-width destination elements, while setting the odd-numbered elements to zero. Each result element is saturated to the half-width N-bit element's unsigned integer range 0 to (2^N)-1. The immediate shift amount is an unsigned value in the range 1 to number of bits per element. This instruction is unpredicated.

if !HaveSVE2() && !HaveSME() then UNDEFINED; bits(3) tsize = tszh:tszl; integer esize; case tsize of when '000' UNDEFINED; when '001' esize = 8; when '01x' esize = 16; when '1xx' esize = 32; integer n = UInt(Zn); integer d = UInt(Zd); integer shift = (2 * esize) - UInt(tsize:imm3);