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Add $size() function. At the moment it works only on expressions, not on memories.

This commit is contained in:
Udi Finkelstein 2017-09-26 06:25:42 +03:00
parent 29f8acf095
commit 64eb8f29ad
2 changed files with 29 additions and 0 deletions
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14
frontends/ast/simplify.cc
View File

@ -1870,6 +1870,20 @@ skip_dynamic_range_lvalue_expansion:;
goto apply_newNode;
}
if (str == "\\$size")
{
if (children.size() != 1)
log_error("System function %s got %d arguments, expected 1 at %s:%d.\n",
RTLIL::unescape_id(str).c_str(), int(children.size()), filename.c_str(), linenum);
AstNode *buf = children[0]->clone();
buf->detectSignWidth(width_hint, sign_hint);
delete buf;
newNode = mkconst_int(width_hint, false);
goto apply_newNode;
}
if (str == "\\$ln" || str == "\\$log10" || str == "\\$exp" || str == "\\$sqrt" || str == "\\$pow" ||
str == "\\$floor" || str == "\\$ceil" || str == "\\$sin" || str == "\\$cos" || str == "\\$tan" ||
str == "\\$asin" || str == "\\$acos" || str == "\\$atan" || str == "\\$atan2" || str == "\\$hypot" ||

15
tests/simple/functions01.sv Normal file
View File

@ -0,0 +1,15 @@
module functions01;
wire [3:0]x;
wire [$size(x)-1:0]x_size;
wire [$size({x, x})-1:0]xx_size;
wire [3:0]w[0:5];
//
// The following are not supported yet:
//
//wire [$size(w)-1:0]w_s;
//wire [$bits(x)-1:0]x_bits;
//wire [$bits({x, x})-1:0]xx_bits;
endmodule