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Merge pull request #1551 from whitequark/manual-cell-operands

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Clarify semantics of comb cells, in particular shifts
This commit is contained in:
Clifford Wolf 2019-12-05 08:24:24 -08:00 • committed by GitHub
commit 7dece7955e
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3 changed files with 82 additions and 43 deletions
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10
frontends/verilog/verilog_parser.y
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@ -2242,7 +2242,7 @@ gen_stmt:
ast_stack.back()->children.push_back(node);
ast_stack.push_back(node);
} opt_arg_list ';'{
ast_stack.pop_back();
ast_stack.pop_back();
};
gen_stmt_block:
@ -2413,19 +2413,19 @@ basic_expr:
append_attr($$, $2);
} |
basic_expr OP_SHL attr basic_expr {
$$ = new AstNode(AST_SHIFT_LEFT, $1, $4);
$$ = new AstNode(AST_SHIFT_LEFT, $1, new AstNode(AST_TO_UNSIGNED, $4));
append_attr($$, $3);
} |
basic_expr OP_SHR attr basic_expr {
$$ = new AstNode(AST_SHIFT_RIGHT, $1, $4);
$$ = new AstNode(AST_SHIFT_RIGHT, $1, new AstNode(AST_TO_UNSIGNED, $4));
append_attr($$, $3);
} |
basic_expr OP_SSHL attr basic_expr {
$$ = new AstNode(AST_SHIFT_SLEFT, $1, $4);
$$ = new AstNode(AST_SHIFT_SLEFT, $1, new AstNode(AST_TO_UNSIGNED, $4));
append_attr($$, $3);
} |
basic_expr OP_SSHR attr basic_expr {
$$ = new AstNode(AST_SHIFT_SRIGHT, $1, $4);
$$ = new AstNode(AST_SHIFT_SRIGHT, $1, new AstNode(AST_TO_UNSIGNED, $4));
append_attr($$, $3);
} |
basic_expr '<' attr basic_expr {