FMAXNMQV

Floating-point maximum number recursive reduction of quadword vector segments

Floating-point maximum number of the same element numbers from each 128-bit source vector segment using a recursive pairwise reduction, placing each result into the corresponding element number of the 128-bit SIMD&FP destination register. Inactive elements in the source vector are treated as the default NaN.

Regardless of the value of FPCR.AH, the behavior is as follows:

• Negative zero compares less than positive zero.
• If one value is numeric and the other is a quiet NaN, the result is the numeric value.
• When FPCR.DN is 0, if either value is a signaling NaN or if both values are NaNs, the result is a quiet NaN.
• When FPCR.DN is 1, if either value is a signaling NaN or if both values are NaNs, the result is Default NaN.

SVE2
(FEAT_SVE2p1)

if !HaveSVE2p1() && !HaveSME2p1() then UNDEFINED; if size == '00' then UNDEFINED; constant integer esize = 8 << UInt(size); integer g = UInt(Pg); integer n = UInt(Zn); integer d = UInt(Vd);