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vlog95: Add support for undefined selects.

This commit is contained in:
Cary R 2013-01-25 12:44:29 -08:00
parent 350369f3fc
commit 59ce217ce2
1 changed files with 28 additions and 15 deletions
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43
tgt-vlog95/misc.c
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@ -1,5 +1,5 @@
/*
* Copyright (C) 2011-2012 Cary R. (cygcary@yahoo.com)
* Copyright (C) 2011-2013 Cary R. (cygcary@yahoo.com)
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
@ -281,14 +281,12 @@ static int64_t get_valid_int64_from_number(ivl_expr_t expr, int *rtype,
ivl_expr_file(expr), ivl_expr_lineno(expr),
msg, *rtype);
vlog_errors += 1;
return 0;
} else if (*rtype < 0) {
fprintf(vlog_out, "<invalid>");
fprintf(stderr, "%s:%u: vlog95 error: Scaled %s has an undefined "
"bit and cannot be represented.\n",
ivl_expr_file(expr), ivl_expr_lineno(expr), msg);
vlog_errors += 1;
return 0;
}
return value;
}
@ -350,22 +348,35 @@ static unsigned is_scaled_expr(ivl_expr_t expr, int msb, int lsb)
return 1;
}
static int64_t get_in_range_int64_from_number(ivl_expr_t expr, int *rtype,
const char *msg)
{
int64_t value = get_int64_from_number(expr, rtype);
if (*rtype > 0) {
fprintf(vlog_out, "<invalid>");
fprintf(stderr, "%s:%u: vlog95 error: Scaled %s is greater than "
"64 bits (%d) and cannot be safely represented.\n",
ivl_expr_file(expr), ivl_expr_lineno(expr),
msg, *rtype);
vlog_errors += 1;
}
return value;
}
void emit_scaled_range(ivl_scope_t scope, ivl_expr_t expr, unsigned width,
int msb, int lsb)
{
int rtype;
int64_t value = get_in_range_int64_from_number(expr, &rtype,
"range value");
if (rtype < 0) fprintf(vlog_out, "[1'bx:1'bx]");
if (rtype) return;
if (msb >= lsb) {
int rtype;
int64_t value = get_valid_int64_from_number(expr, &rtype,
"range value");
if (rtype) return;
value += lsb;
fprintf(vlog_out, "[%"PRId64":%"PRId64"]",
value + (int64_t)(width - 1), value);
} else {
int rtype;
int64_t value = get_valid_int64_from_number(expr, &rtype,
"range value");
if (rtype) return;
value = (int64_t)lsb - value;
fprintf(vlog_out, "[%"PRId64":%"PRId64"]",
value - (int64_t)(width - 1), value);
@ -377,8 +388,9 @@ void emit_scaled_expr(ivl_scope_t scope, ivl_expr_t expr, int msb, int lsb)
if (msb >= lsb) {
if (ivl_expr_type(expr) == IVL_EX_NUMBER) {
int rtype;
int64_t value = get_valid_int64_from_number(expr, &rtype,
"value");
int64_t value = get_in_range_int64_from_number(expr, &rtype,
"value");
if (rtype < 0) fprintf(vlog_out, "1'bx");
if (rtype) return;
value += lsb;
fprintf(vlog_out, "%"PRId64, value);
@ -393,8 +405,9 @@ void emit_scaled_expr(ivl_scope_t scope, ivl_expr_t expr, int msb, int lsb)
} else {
if (ivl_expr_type(expr) == IVL_EX_NUMBER) {
int rtype;
int64_t value = get_valid_int64_from_number(expr, &rtype,
"value");
int64_t value = get_in_range_int64_from_number(expr, &rtype,
"value");
if (rtype < 0) fprintf(vlog_out, "1'bx");
if (rtype) return;
value = (int64_t)lsb - value;
fprintf(vlog_out, "%"PRId64, value);