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Improvements to $display system task

This commit is contained in:
Andrew Zonenberg 2015-09-19 00:00:00 +00:00 committed by Clifford Wolf
parent 598a475724
commit c469f22144
1 changed files with 22 additions and 9 deletions
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31
frontends/ast/simplify.cc
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@ -212,6 +212,19 @@ bool AstNode::simplify(bool const_fold, bool at_zero, bool in_lvalue, int stage,
// format specifier
if(sformat[i] == '%')
{
// If there's no next character, that's a problem
if(i+1 >= sformat.length())
log_error("System task `%s' called with `%%' at end of string at %s:%d.\n", str.c_str(), filename.c_str(), linenum);
char cformat = sformat[++i];
// %% is special, does not need a matching argument
if(cformat == '%')
{
sout += '%';
continue;
}
// If we're out of arguments, that's a problem!
if(next_arg >= nargs)
log_error("System task `%s' called with more format specifiers than arguments at %s:%d.\n", str.c_str(), filename.c_str(), linenum);
@ -222,18 +235,9 @@ bool AstNode::simplify(bool const_fold, bool at_zero, bool in_lvalue, int stage,
if (node_arg->type != AST_CONSTANT)
log_error("Failed to evaluate system task `%s' with non-constant argument at %s:%d.\n", str.c_str(), filename.c_str(), linenum);
// If there's no next character, that's a problem
if(i+1 >= sformat.length())
log_error("System task `%s' called with `%%' at end of string at %s:%d.\n", str.c_str(), filename.c_str(), linenum);
// Everything from here on depends on the format specifier
char cformat = sformat[++i];
switch(cformat)
{
case '%':
sout += '%';
break;
case 's':
case 'S':
sout += node_arg->bitsAsConst().decode_string();
@ -248,6 +252,15 @@ bool AstNode::simplify(bool const_fold, bool at_zero, bool in_lvalue, int stage,
}
break;
case 'x':
case 'X':
{
char tmp[128];
snprintf(tmp, sizeof(tmp), "%x", node_arg->bitsAsConst().as_int());
sout += tmp;
}
break;
default:
log_error("System task `%s' called with invalid format specifier at %s:%d.\n", str.c_str(), filename.c_str(), linenum);
break;