Page 368 - ARM 64 Bit Assembly Language

358 Chapter 10

10.6.7.1 Syntax

(s|u)<op>{p} Vd.T, Vn.T, Vm.T
f<op>{p} Vd.Tf, Vn.Tf, Vm.Tf

• <op> is either max or min.
• T must be 8b, 16b, 4h, 8h, 2s,or 4s.
• Tf must be 2s, 4s,or 2d.
• If nm is present, then the result is as described in Chapter 9, Section 9.7.5,onpage 311.

10.6.7.2 Operations

Name Effect Description
(s|u|f)max n ← # of elements Compare corresponding elements
for 0 ≤ i< n do and copy the greater of each pair
if Vn[i] > Vm[i] then into the corresponding element in
Vd[i]← Vn[i] the destination vector.
else
Vd[i]← Vm[i]
end if
end for
(s|u|f)maxp n ← # of elements Compare elements pairwise and
for 0 ≤ i< (n ÷ 2) do copy the greater of each pair into
if Vm[i] > Vm[i + 1] then an element in the destination vec-
Vd[i]← Vm[i] tor.
else
Vd[i]← Vm[i + 1]
end if
end for
for (n ÷ 2) ≤ i< n do
if Vn[i] > Vn[i + 1] then
Vd[i + (n ÷ 2)]← Vn[i]
else
Vd[i + (n ÷ 2)]←
Vn[i + 1]
end if
end for
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