FMAXP

Floating-point maximum pairwise

Compute the maximum value of each pair of adjacent floating-point elements within each source vector, and interleave the results from corresponding lanes. The interleaved result values are destructively placed in the first source vector.

When FPCR.AH is 0, the behavior is as follows for each pairwise operation:

• Negative zero compares less than positive zero.
• When FPCR.DN is 0, if either element is a NaN, the result is a quiet NaN.
• When FPCR.DN is 1, if either element is a NaN, the result is Default NaN.

When FPCR.AH is 1, the behavior is as follows for each pairwise operation:

• If both elements are zeros, regardless of the sign of either zero, the result is the second element.
• If either element is a NaN, regardless of the value of FPCR.DN, the result is the second element.

if !HaveSVE2() && !HaveSME() then UNDEFINED; if size == '00' then UNDEFINED; constant integer esize = 8 << UInt(size); integer g = UInt(Pg); integer m = UInt(Zm); integer dn = UInt(Zdn);