Section 15.3

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An input skew of #0 forces a skew of zero. Inputs with zero skew are sampled at the same time as their corresponding clocking event, but to avoid races, they are sampled in the observed region. Likewise, outputs with zero skew are driven at the same time as their specified clocking event, as nonblocking assignments (in the NBA region).

 

Skews are declarative constructs, thus, they are semantically very different from the syntactically similar procedural delay statement.  In particular, a #0 skew, does not suspend any process nor does it execute or sample values in the Inactive region.

Section 15.4

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However, hierarchical expressions are not limited to simple names or signals in other scopes. They can be used to declare slices, and concatenations, (or combinations thereof) of signals in other scopes or in the current scope.

Section 15.10

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Example:

 

## 5;         // wait 5 cycles (clocking events) using the default clocking

 

## j + 1;     // wait j+1 cycles (clocking events) using the default clocking

Section 15.11

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Use the BNF from A.1.5 for syntax of default clocking clocking_identifier;

Remove editor’s note:

Editor’s Note: I was not able to match the first version of the original syntax with what is in the BNF. Nor does the BNF seem to support example 2, below.

Section 15.14

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Use the BNF from Section A.6.4 and Section A.6.11

Remove editor’s note:

Editor’s Note: I could not find this syntax in the BNF.