Compare the lower single-precision (32-bit) floating-point elements in a and b, store the maximum value in the lower element of result, and copy the upper 3 packed elements from a to the upper element of result.
See Implementation
Compare the lower single-precision (32-bit) floating-point elements in a and b, store the maximum value in the lower element of result, and copy the upper 3 packed elements from a to the upper element of result.