Quadruple accuracy
In computer science, four times the accuracy ( English quad precision ) is a term for a number format that has four storage units in the computer. The exact details therefore depend on the computer manufacturer and its memory architecture. The 128-bit data type shown in the following figure is described in the current version of the IEEE 754-2008 standard:
The designation is not only reserved for floating point numbers , but can also be used for integer formats (double quadword).