FAMAX

Floating-point absolute maximum. This instruction determines the maximum absolute value from floating-point elements of the first source vector and the corresponding floating-point elements of the second source vector, and places the results in the corresponding elements of the destination vector.

The behavior is as follows:

• 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 the Default NaN.
• Denormalized inputs and results are never flushed to zero, as if FPCR.{FZ, FZ16, FIZ} is {0, 0, 0}.
• Denormalized inputs never generate an Input Denormal floating-point exception.

It has encodings from 2 classes: Half-precision and Single-precision and double-precision

Half-precision
(FEAT_FAMINMAX)

if !IsFeatureImplemented(FEAT_FAMINMAX) then UNDEFINED; constant integer esize = 16; integer n = UInt(Rn); integer m = UInt(Rm); integer d = UInt(Rd); constant integer datasize = if Q == '1' then 128 else 64; integer elements = datasize DIV esize; boolean ismax = U == '0';

Single-precision and double-precision
(FEAT_FAMINMAX)

if !IsFeatureImplemented(FEAT_FAMINMAX) then UNDEFINED; if Q == '0' && size == '11' then UNDEFINED; constant integer esize = 8 << UInt(size); integer n = UInt(Rn); integer m = UInt(Rm); integer d = UInt(Rd); constant integer datasize = if Q == '1' then 128 else 64; integer elements = datasize DIV esize; boolean ismax = U == '0';