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Branches are parts of islands. 

Expose the island information for branches to the ivl_target API.
This commit is contained in:
Stephen Williams 2008-11-24 22:00:33 -08:00
parent 87177087c4
commit 16e5197325
5 changed files with 17 additions and 2 deletions
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1
ivl.def
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@ -1,5 +1,6 @@
EXPORTS EXPORTS
ivl_branch_island
ivl_branch_terminal ivl_branch_terminal
ivl_design_const ivl_design_const

10
ivl_target.h
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@ -422,11 +422,17 @@ typedef const struct ivl_attribute_s*ivl_attribute_t;
/* BRANCH /* BRANCH
* Branches are analog constructs, a pair of terminals that is used in * Branches are analog constructs, a pair of terminals that is used in
* branch access functions. Terminal-1 is the reference node for the * branch access functions. Terminal-1 is the reference node (The
* purposes of the access function that accesses it. * "ground") for the purposes of the access function that accesses it.
*
* SEMANTIC NOTES
* All the branches in an island are connected by terminals or by
* expressions. The island is the connection of branches that must be
* solved together.
*/ */
/* extern ivl_scope_t ivl_branch_scope(ivl_branch_t obj); */ /* extern ivl_scope_t ivl_branch_scope(ivl_branch_t obj); */
extern ivl_nexus_t ivl_branch_terminal(ivl_branch_t obj, int idx); extern ivl_nexus_t ivl_branch_terminal(ivl_branch_t obj, int idx);
extern ivl_island_t ivl_branch_island(ivl_branch_t obj);
/* DELAYPATH /* DELAYPATH
* Delaypath objects represent delay paths called out by a specify * Delaypath objects represent delay paths called out by a specify

1
ivl_target_priv.h
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@ -64,6 +64,7 @@ struct ivl_design_s {
*/ */
struct ivl_branch_s { struct ivl_branch_s {
ivl_nexus_t pins[2]; ivl_nexus_t pins[2];
ivl_island_t island;
}; };
/* /*

5
t-dll-api.cc
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@ -31,6 +31,11 @@ static StringHeap api_strings;
/* THE FOLLOWING ARE FUNCTIONS THAT ARE CALLED FROM THE TARGET. */ /* THE FOLLOWING ARE FUNCTIONS THAT ARE CALLED FROM THE TARGET. */
extern "C" ivl_island_t ivl_branch_island(ivl_branch_t net)
{
return net->island;
}
extern "C" ivl_nexus_t ivl_branch_terminal(ivl_branch_t net, int idx) extern "C" ivl_nexus_t ivl_branch_terminal(ivl_branch_t net, int idx)
{ {
assert(idx >= 0); assert(idx >= 0);

2
t-dll.cc
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@ -798,6 +798,8 @@ bool dll_target::branch(const NetBranch*net)
obj->pins[1] = net->pin(1).nexus()->t_cookie(); obj->pins[1] = net->pin(1).nexus()->t_cookie();
nexus_bra_add(obj->pins[1], obj, 1); nexus_bra_add(obj->pins[1], obj, 1);
obj->island = net->get_island();
return true; return true;
} }