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Implement the unary ! operator.

This commit is contained in:
steve 2001-04-01 21:47:29 +00:00
parent 7a8135c703
commit f8e6d782e1
1 changed files with 23 additions and 1 deletions
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24
tgt-vvp/eval_expr.c
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@ -17,7 +17,7 @@
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
*/
#if !defined(WINNT)
#ident "$Id: eval_expr.c,v 1.9 2001/04/01 07:22:42 steve Exp $"
#ident "$Id: eval_expr.c,v 1.10 2001/04/01 21:47:29 steve Exp $"
#endif
# include "vvp_priv.h"
@ -442,6 +442,25 @@ static struct vector_info draw_unary_expr(ivl_expr_t exp, unsigned wid)
fprintf(vvp_out, " %%inv %u, %u;\n", res.base, res.wid);
break;
case '!':
if (res.wid > 1) {
/* a ! on a vector is implemented with a reduction
nor. Generate the result into the first bit of
the input vector and free the rest of the
vector. */
struct vector_info tmp;
assert(res.base >= 4);
tmp.base = res.base+1;
tmp.wid = res.wid - 1;
fprintf(vvp_out, " %%nor/r %u, %u, %u;\n",
res.base, res.base, res.wid);
clr_vector(tmp);
res.wid = 1;
} else {
fprintf(vvp_out, " %%inv %u, 1;\n", res.base);
}
break;
default:
fprintf(stderr, "vvp error: unhandled unary: %c\n",
ivl_expr_opcode(exp));
@ -496,6 +515,9 @@ struct vector_info draw_eval_expr(ivl_expr_t exp)
/*
* $Log: eval_expr.c,v $
* Revision 1.10 2001/04/01 21:47:29 steve
* Implement the unary ! operator.
*
* Revision 1.9 2001/04/01 07:22:42 steve
* Generate code for < and <=.
*