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Initial implementation of elaboration system tasks

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(IEEE1800-2017 section 20.11)
This PR allows us to use $info/$warning/$error/$fatal **at elaboration time** within a generate block.
This is very useful to stop a synthesis of a parametrized block when an
illegal combination of parameters is chosen.
This commit is contained in:
Udi Finkelstein 2019-05-03 03:10:43 +03:00
parent 98925f6c4b
commit ac10e7d96d
10 changed files with 107 additions and 5 deletions
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4
frontends/ast/ast.h
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@ -137,7 +137,8 @@ namespace AST
AST_GENIF,
AST_GENCASE,
AST_GENBLOCK,
AST_TECALL,
AST_POSEDGE,
AST_NEGEDGE,
AST_EDGE,
@ -233,6 +234,7 @@ namespace AST
bool mem2reg_check(pool<AstNode*> &mem2reg_set);
void mem2reg_remove(pool<AstNode*> &mem2reg_set, vector<AstNode*> &delnodes);
void meminfo(int &mem_width, int &mem_size, int &addr_bits);
bool check_elab_tasks(void);
// additional functionality for evaluating constant functions
struct varinfo_t { RTLIL::Const val; int offset; bool is_signed; };