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Allow SystemVerilog [size] dimension for unpacked arrays. 

IEEE 1800-2005/9 says "each fixed-size dimension shall be represented by
an address range, such as [1:1024], or a single positive number to
specify the size of a fixed-size unpacked array, as in C. In other
words, [size] becomes the same as [0:size-1]."

This patch implements that translation in the parser.  It issues a
warning when doing so when the generation flag is less than 2005-sv.
This commit is contained in:
Jared Casper 2010-11-20 18:25:47 -08:00 committed by Stephen Williams
parent ce5c263b4a
commit 97d2389cb0
1 changed files with 26 additions and 0 deletions
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parse.y
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@ -3463,6 +3463,19 @@ dimensions
tmp->push_back(index); tmp->push_back(index);
$$ = tmp; $$ = tmp;
} }
| '[' expression ']'
{ if (generation_flag < GN_VER2005_SV) {
warn_count += 1;
cerr << @2 << ": warning: Use of SystemVerilog [size] dimension. "
<< "Use at least -g2005-sv to remove this warning." << endl;
}
list<index_component_t> *tmp = new list<index_component_t>;
index_component_t index;
index.msb = new PENumber(new verinum((uint64_t)0, integer_width));
index.lsb = new PEBinary('-', $2, new PENumber(new verinum((uint64_t)1, integer_width)));
tmp->push_back(index);
$$ = tmp;
}
| dimensions '[' expression ':' expression ']' | dimensions '[' expression ':' expression ']'
{ list<index_component_t> *tmp = $1; { list<index_component_t> *tmp = $1;
index_component_t index; index_component_t index;
@ -3471,6 +3484,19 @@ dimensions
tmp->push_back(index); tmp->push_back(index);
$$ = tmp; $$ = tmp;
} }
| dimensions '[' expression ']'
{ if (generation_flag < GN_VER2005_SV) {
warn_count += 1;
cerr << @2 << ": warning: Use of SystemVerilog [size] dimension. "
<< "Use at least -g2005-sv to remove this warning." << endl;
}
list<index_component_t> *tmp = $1;
index_component_t index;
index.msb = new PENumber(new verinum((uint64_t)0, integer_width));
index.lsb = new PEBinary('-', $3, new PENumber(new verinum((uint64_t)1, integer_width)));
tmp->push_back(index);
$$ = tmp;
}
/* This is used to express the return type of a function. */ /* This is used to express the return type of a function. */
function_range_or_type_opt function_range_or_type_opt