MMIX Instruction Set

LDUNC and STUNC

LDUNC $X,$Y,$Z
STUNC $X,$Y,$Z

Specification:

s($X)	← s(M8[$Y + $Z]) or
s(M8[$Y + $Z])	← $X

Timing:

1υ + 1μ

Description:

Load or store an octabyte, similar to LDO and STO, without using the cache.

LDUNC | STUNC:

"preload data" These instructions, which have the same meaning as LDO | STO, also inform the computer that the loaded | stored octabyte (and its neighbors in a cache block) will probably not be read or written in the near future. This is why the cache is not used.

See also:

LDO and STO.