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Expression lookaside cannot hold complex expressions

This commit is contained in:
steve 2007-02-06 04:43:53 +00:00
parent 326329d497
commit 2b3acfb344
1 changed files with 22 additions and 1 deletions
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23
tgt-vvp/vector.c
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@ -16,7 +16,7 @@
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
*/
#ifdef HAVE_CVS_IDENT
#ident "$Id: vector.c,v 1.10 2007/01/19 02:30:19 steve Exp $"
#ident "$Id: vector.c,v 1.11 2007/02/06 04:43:53 steve Exp $"
#endif
# include "vvp_priv.h"
@ -105,6 +105,7 @@ static unsigned allocate_vector_no_lookaside(unsigned wid, int skip_lookaside)
for (idx = 0 ; idx < wid ; idx += 1) {
allocation_map[base+idx].alloc += 1;
set_exp(base+idx, 0, 0);
set_sig(base+idx, 0, 0, 0);
}
return base;
@ -147,12 +148,29 @@ void clear_expression_lookaside(void)
lookaside_top = 0;
}
static int test_expression_savable(ivl_expr_t exp)
{
switch (ivl_expr_type(exp)) {
case IVL_EX_NUMBER:
case IVL_EX_STRING:
return 1;
default:
return 0;
}
}
void save_expression_lookaside(unsigned addr, ivl_expr_t exp, unsigned wid)
{
unsigned idx;
assert(addr >= 8);
assert((addr+wid) <= MAX_VEC);
/* Only certain types of expressions are savable. */
if ( ! test_expression_savable(exp))
return;
/* When saving an expression to the lookaside, also clear the
signal saved in the lookaside for these bits. The reason is
that an expression calculation will replace any signal
@ -354,6 +372,9 @@ unsigned allocate_vector_exp(ivl_expr_t exp, unsigned wid,
/*
* $Log: vector.c,v $
* Revision 1.11 2007/02/06 04:43:53 steve
* Expression lookaside cannot hold complex expressions
*
* Revision 1.10 2007/01/19 02:30:19 steve
* Fix bad lookaside references in vvp thread code generator.
*