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2 Instructions

2-36

CP1E CPU Unit Instructions Reference Manual(W483)

 Differences between MILH(517) and MILR(518)

Differentiated instructions (DIFU, DIFD, or instructions with a @ or % prefix) operate differently in inter-

locks created with MILH(517) and MILR(518).

The operation of differentiated instructions in an interlock created with MILH(517) is identical to the

operation in an interlock created with IL(002).

For details, refer to MULTI-INTERLOCK DIFFERENTIATION HOLD, MULTI-INTERLOCK DIFFEREN-

TIATION RELEASE, and MULTI-INTERLOCK CLEAR: MILH(517), MILR(518), and MILC(519).

 Precautions

Do not combine interlocks created with different interlock instructions (IL-ILC, MILH-MILC, and MILR-

MILC). The interlocks may not operate properly if different interlock methods are used together. For

details on combining instructions, refer to MULTI-INTERLOCK DIFFERENTIATION HOLD, MULTI-

INTERLOCK DIFFERENTIATION RELEASE, and MULTI-INTERLOCK CLEAR: MILH(517),

MILR(518), and MILC(519).

For example, an MILH(517) instruction cannot be inserted between IL(002) and IL(003).

Note The different interlocks (IL-ILC, MILH-MILC, and MILR-MILC) can be used together as long as the inter-

locked program sections do not overlap.

For example, all three interlock methods can be used without overlapping, as shown in the following

diagram.

MILH

ILC

MILH(517) is in an interlocked area

between IL(002) and ILC.(003).

MILH

MILC

ILC

MILR

MILC

Different interlock methods can be

used as long as the interlocked

areas do not overlap.

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