[Paul_Clayton]

The Motorola 88k and 68k both supported (eventually) extended precision, and, of course, Itanium supported it for x87 compatibility.

https://en.wikipedia.org/wiki/Motorola_88000 (under "Registers": "32 80-bit (88110 only)")

https://en.wikipedia.org/wiki/Extended_precision (see section titled "IEEE 754 extended-precision formats")