static void emit_stmt_case(ivl_scope_t scope, ivl_statement_t stmt)
{
char *case_type;
unsigned idx, default_case, count = ivl_stmt_case_count(stmt);
switch(ivl_statement_type(stmt)) {
case IVL_ST_CASE:
case IVL_ST_CASER:
case_type = "case";
break;
case IVL_ST_CASEX:
case_type = "casex";
break;
case IVL_ST_CASEZ:
case_type = "casez";
break;
default:
assert(0);
}
fprintf(vlog_out, "%*c%s (", get_indent(), ' ', case_type);
emit_expr(scope, ivl_stmt_cond_expr(stmt), 0);
fprintf(vlog_out, ")");
emit_stmt_file_line(stmt);
fprintf(vlog_out, "\n");
indent += indent_incr;
default_case = count;
for (idx = 0; idx < count; idx += 1) {
ivl_expr_t expr = ivl_stmt_case_expr(stmt, idx);
/* This is the default case so emit it last. */
if (expr == 0) {
assert(default_case == count);
default_case = idx;
continue;
}
fprintf(vlog_out, "%*c", get_indent(), ' ');
emit_expr(scope, expr, 0);
fprintf(vlog_out, ":");
single_indent = 1;
emit_stmt(scope, ivl_stmt_case_stmt(stmt, idx));
}
if (default_case < count) {
fprintf(vlog_out, "%*cdefault:", get_indent(), ' ');
single_indent = 1;
emit_stmt(scope, ivl_stmt_case_stmt(stmt, default_case));
}
assert(indent >= indent_incr);
indent -= indent_incr;
fprintf(vlog_out, "%*cendcase\n", get_indent(), ' ');
}
static int show_stmt_case_r(ivl_statement_t net, ivl_scope_t sscope)
{
ivl_expr_t exp = ivl_stmt_cond_expr(net);
int cond = draw_eval_real(exp);
unsigned count = ivl_stmt_case_count(net);
unsigned local_base = local_count;
unsigned idx, default_case;
local_count += count + 1;
/* First draw the branch table. All the non-default cases
generate a branch out of here, to the code that implements
the case. The default will fall through all the tests. */
default_case = count;
for (idx = 0 ; idx < count ; idx += 1) {
ivl_expr_t cex = ivl_stmt_case_expr(net, idx);
int cvec;
if (cex == 0) {
default_case = idx;
continue;
}
cvec = draw_eval_real(cex);
fprintf(vvp_out, " %%cmp/wr %d, %d;\n", cond, cvec);
fprintf(vvp_out, " %%jmp/1 T_%d.%d, 4;\n",
thread_count, local_base+idx);
/* Done with the guard expression value. */
clr_word(cvec);
}
/* Done with the case expression. */
clr_word(cond);
/* Emit code for the case default. The above jump table will
fall through to this statement. */
if (default_case < count) {
ivl_statement_t cst = ivl_stmt_case_stmt(net, default_case);
show_statement(cst, sscope);
}
/* Jump to the out of the case. */
fprintf(vvp_out, " %%jmp T_%d.%d;\n", thread_count,
local_base+count);
for (idx = 0 ; idx < count ; idx += 1) {
ivl_statement_t cst = ivl_stmt_case_stmt(net, idx);
if (idx == default_case)
continue;
fprintf(vvp_out, "T_%d.%d ;\n", thread_count, local_base+idx);
clear_expression_lookaside();
show_statement(cst, sscope);
fprintf(vvp_out, " %%jmp T_%d.%d;\n", thread_count,
local_base+count);
}
/* The out of the case. */
fprintf(vvp_out, "T_%d.%d ;\n", thread_count, local_base+count);
return 0;
}
static int show_stmt_case(ivl_statement_t net, ivl_scope_t sscope)
{
ivl_expr_t exp = ivl_stmt_cond_expr(net);
struct vector_info cond = draw_eval_expr(exp, 0);
unsigned count = ivl_stmt_case_count(net);
unsigned local_base = local_count;
unsigned idx, default_case;
local_count += count + 1;
/* First draw the branch table. All the non-default cases
generate a branch out of here, to the code that implements
the case. The default will fall through all the tests. */
default_case = count;
for (idx = 0 ; idx < count ; idx += 1) {
ivl_expr_t cex = ivl_stmt_case_expr(net, idx);
struct vector_info cvec;
if (cex == 0) {
default_case = idx;
continue;
}
/* Is the guard expression something I can pass to a
%cmpi/u instruction? If so, use that instead. */
if ((ivl_statement_type(net) == IVL_ST_CASE)
&& (ivl_expr_type(cex) == IVL_EX_NUMBER)
&& (! number_is_unknown(cex))
&& number_is_immediate(cex, 16)) {
unsigned long imm = get_number_immediate(cex);
fprintf(vvp_out, " %%cmpi/u %u, %lu, %u;\n",
cond.base, imm, cond.wid);
fprintf(vvp_out, " %%jmp/1 T_%d.%d, 6;\n",
thread_count, local_base+idx);
continue;
}
/* Oh well, do this case the hard way. */
cvec = draw_eval_expr_wid(cex, cond.wid, 0);
assert(cvec.wid == cond.wid);
switch (ivl_statement_type(net)) {
case IVL_ST_CASE:
fprintf(vvp_out, " %%cmp/u %u, %u, %u;\n",
cond.base, cvec.base, cond.wid);
fprintf(vvp_out, " %%jmp/1 T_%d.%d, 6;\n",
thread_count, local_base+idx);
break;
case IVL_ST_CASEX:
fprintf(vvp_out, " %%cmp/x %u, %u, %u;\n",
cond.base, cvec.base, cond.wid);
fprintf(vvp_out, " %%jmp/1 T_%d.%d, 4;\n",
thread_count, local_base+idx);
break;
case IVL_ST_CASEZ:
fprintf(vvp_out, " %%cmp/z %u, %u, %u;\n",
cond.base, cvec.base, cond.wid);
fprintf(vvp_out, " %%jmp/1 T_%d.%d, 4;\n",
thread_count, local_base+idx);
break;
default:
assert(0);
}
/* Done with the case expression */
clr_vector(cvec);
}
/* Done with the condition expression */
clr_vector(cond);
/* Emit code for the default case. */
if (default_case < count) {
ivl_statement_t cst = ivl_stmt_case_stmt(net, default_case);
show_statement(cst, sscope);
}
/* Jump to the out of the case. */
fprintf(vvp_out, " %%jmp T_%d.%d;\n", thread_count,
local_base+count);
for (idx = 0 ; idx < count ; idx += 1) {
ivl_statement_t cst = ivl_stmt_case_stmt(net, idx);
if (idx == default_case)
continue;
fprintf(vvp_out, "T_%d.%d ;\n", thread_count, local_base+idx);
clear_expression_lookaside();
show_statement(cst, sscope);
fprintf(vvp_out, " %%jmp T_%d.%d;\n", thread_count,
local_base+count);
}
/* The out of the case. */
fprintf(vvp_out, "T_%d.%d ;\n", thread_count, local_base+count);
clear_expression_lookaside();
return 0;
}
