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Added wire->upto flag for signals such as "wire [0:7] x;"

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This commit is contained in:
Clifford Wolf 2014-07-28 12:12:13 +02:00
parent 7bd2d1064f
commit 3c45277ee0
6 changed files with 13 additions and 2 deletions
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3
frontends/ast/genrtlil.cc
View file

@ -786,10 +786,12 @@ RTLIL::SigSpec AstNode::genRTLIL(int width_hint, bool sign_hint)
log_error("Signal `%s' with non-constant width at %s:%d!\n",
str.c_str(), filename.c_str(), linenum);
bool wire_upto = false;
if (range_left < range_right && (range_left != -1 || range_right != 0)) {
int tmp = range_left;
range_left = range_right;
range_right = tmp;
wire_upto = true;
}
RTLIL::Wire *wire = current_module->addWire(str, range_left - range_right + 1);
@ -798,6 +800,7 @@ RTLIL::SigSpec AstNode::genRTLIL(int width_hint, bool sign_hint)
wire->port_id = port_id;
wire->port_input = is_input;
wire->port_output = is_output;
wire->upto = wire_upto;
for (auto &attr : attributes) {
if (attr.second->type != AST_CONSTANT)

1
frontends/ilang/lexer.l
View file

@ -51,6 +51,7 @@
"wire" { return TOK_WIRE; }
"memory" { return TOK_MEMORY; }
"width" { return TOK_WIDTH; }
"upto" { return TOK_UPTO; }
"offset" { return TOK_OFFSET; }
"size" { return TOK_SIZE; }
"input" { return TOK_INPUT; }

5
frontends/ilang/parser.y
View file

@ -54,7 +54,7 @@ using namespace ILANG_FRONTEND;
%token TOK_CELL TOK_CONNECT TOK_SWITCH TOK_CASE TOK_ASSIGN TOK_SYNC
%token TOK_LOW TOK_HIGH TOK_POSEDGE TOK_NEGEDGE TOK_EDGE TOK_ALWAYS TOK_INIT
%token TOK_UPDATE TOK_PROCESS TOK_END TOK_INVALID TOK_EOL TOK_OFFSET
%token TOK_PARAMETER TOK_ATTRIBUTE TOK_MEMORY TOK_SIZE TOK_SIGNED
%token TOK_PARAMETER TOK_ATTRIBUTE TOK_MEMORY TOK_SIZE TOK_SIGNED TOK_UPTO
%type <sigspec> sigspec sigspec_list
%type <integer> sync_type
@ -135,6 +135,9 @@ wire_options:
wire_options TOK_WIDTH TOK_INT {
current_wire->width = $3;
} |
wire_options TOK_UPTO {
current_wire->upto = true;
} |
wire_options TOK_OFFSET TOK_INT {
current_wire->start_offset = $3;
} |