The 68040 CPU had two rounding modes to support interval arithmetic. From the M68040 User’s Manual (https://www.nxp.com/docs/en/reference-manual/MC68040UM.pdf

The 68040 CPU had two rounding modes to support interval arithmetic. From the M68040 User’s Manual (https://www.nxp.com/docs/en/reference-manual/MC68040UM.pdf https://www.nxp.com/docs/en/reference-manual/MC68040UM.pdf): "The processor supports four rounding modes specified by the IEEE 754 standard. These modes are: round to nearest (RN), round toward zero (RZ), round toward plus infinity (RP), and round toward minus infinity (RM). The RP and RM modes are directed rounding modes that are useful in interval arithmetic."