MMIX LOGO

MMIX Instruction Set

Table of Content

Content

LDUNC and STUNC

Name:

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.

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