Generate code to handle real valued muxes.
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steve
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4902c222fb
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c39976fbf1
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@ -19,7 +19,7 @@
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
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*/
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#ifdef HAVE_CVS_IDENT
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#ident "$Id: ivl_target.h,v 1.159 2005/08/06 17:58:16 steve Exp $"
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#ident "$Id: ivl_target.h,v 1.160 2005/09/01 04:11:37 steve Exp $"
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#endif
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#ifdef __cplusplus
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@ -920,7 +920,8 @@ extern const char* ivl_udp_name(ivl_udp_t net);
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* The ivl_lpm_data() method returns the inputs of the MUX device. The
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* ivl_lpm_size() method returns the number of data inputs there
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* are. All the data inputs have the same width, the width of the
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* ivl_lpm_q output.
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* ivl_lpm_q output. The type of the device is devined from the
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* inputs and the Q. All the types must be exactly the same.
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*
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* - D-FlipFlop (IVL_LPM_FF)
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* This data is an edge sensitive register. The ivl_lpm_q output and
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@ -1670,6 +1671,9 @@ _END_DECL
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/*
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* $Log: ivl_target.h,v $
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* Revision 1.160 2005/09/01 04:11:37 steve
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* Generate code to handle real valued muxes.
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*
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* Revision 1.159 2005/08/06 17:58:16 steve
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* Implement bi-directional part selects.
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*
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11
netlist.h
11
netlist.h
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@ -19,7 +19,7 @@
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
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*/
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#ifdef HAVE_CVS_IDENT
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#ident "$Id: netlist.h,v 1.348 2005/08/31 05:07:31 steve Exp $"
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#ident "$Id: netlist.h,v 1.349 2005/09/01 04:11:37 steve Exp $"
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#endif
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/*
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@ -876,6 +876,12 @@ class NetMult : public NetNode {
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* width -- Width of the result and each possible Data input
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* size -- Number of Data input (each of width)
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* selw -- Width in bits of the select input
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*
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* All the data inputs must have the same type, and are the type of
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* the result. The actual type does not matter, as the mux does not
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* process data, just selects alternatives.
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*
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* The select input must be an integral type of some sort. Not real.
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*/
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class NetMux : public NetNode {
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@ -3436,6 +3442,9 @@ extern ostream& operator << (ostream&, NetNet::Type);
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/*
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* $Log: netlist.h,v $
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* Revision 1.349 2005/09/01 04:11:37 steve
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* Generate code to handle real valued muxes.
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*
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* Revision 1.348 2005/08/31 05:07:31 steve
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* Handle memory references is continuous assignments.
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*
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@ -17,7 +17,7 @@
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
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*/
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#ifdef HAVE_CVS_IDENT
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#ident "$Id: draw_mux.c,v 1.11 2005/08/27 04:32:08 steve Exp $"
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#ident "$Id: draw_mux.c,v 1.12 2005/09/01 04:11:37 steve Exp $"
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#endif
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# include "vvp_priv.h"
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@ -33,7 +33,7 @@
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* This draws a simple A/B mux. The mux can have any width, enough
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* MUXZ nodes are created to support the vector.
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*/
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static void draw_lpm_mux_ab(ivl_lpm_t net)
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static void draw_lpm_mux_ab(ivl_lpm_t net, const char*muxz)
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{
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unsigned width = ivl_lpm_width(net);
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@ -41,14 +41,14 @@ static void draw_lpm_mux_ab(ivl_lpm_t net)
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assert(ivl_lpm_size(net) == 2);
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assert(ivl_lpm_selects(net) == 1);
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fprintf(vvp_out, "L_%p .functor MUXZ %u", net, width);
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fprintf(vvp_out, "L_%p .functor %s %u", net, muxz, width);
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fprintf(vvp_out, ", %s", draw_net_input(ivl_lpm_data(net,0)));
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fprintf(vvp_out, ", %s", draw_net_input(ivl_lpm_data(net,1)));
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fprintf(vvp_out, ", %s", draw_net_input(ivl_lpm_select(net)));
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fprintf(vvp_out, ", C4<>;\n");
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}
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static void draw_lpm_mux_nest(ivl_lpm_t net)
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static void draw_lpm_mux_nest(ivl_lpm_t net, const char*muxz)
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{
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int idx, level;
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unsigned width = ivl_lpm_width(net);
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@ -63,8 +63,8 @@ static void draw_lpm_mux_nest(ivl_lpm_t net)
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net, select_input);
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for (idx = 0 ; idx < ivl_lpm_size(net) ; idx += 2) {
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fprintf(vvp_out, "L_%p/0/%d .functor MUXZ %u",
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net, idx/2, width);
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fprintf(vvp_out, "L_%p/0/%d .functor %s %u",
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net, idx/2, muxz, width);
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fprintf(vvp_out, ", %s", draw_net_input(ivl_lpm_data(net,idx+0)));
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fprintf(vvp_out, ", %s", draw_net_input(ivl_lpm_data(net,idx+1)));
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fprintf(vvp_out, ", L_%p/0s, C4<>;\n", net);
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@ -75,8 +75,8 @@ static void draw_lpm_mux_nest(ivl_lpm_t net)
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net, level, select_input, level);
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for (idx = 0 ; idx < (ivl_lpm_size(net) >> level); idx += 2) {
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fprintf(vvp_out, "L_%p/%d/%d .functor MUXZ %u",
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net, width, level,idx);
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fprintf(vvp_out, "L_%p/%d/%d .functor %s %u",
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net, width, level, muxz, idx);
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fprintf(vvp_out, ", L_%p/%d/%d", net, level-1, idx/2+0);
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fprintf(vvp_out, ", L_%p/%d/%d", net, level-1, idx/2+1);
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fprintf(vvp_out, ", L_%p/%ds", net, level);
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@ -90,28 +90,46 @@ static void draw_lpm_mux_nest(ivl_lpm_t net)
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net, swidth-1, select_input, swidth-1, swidth-1);
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fprintf(vvp_out, "L_%p .functor MUXZ %u", net, width);
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fprintf(vvp_out, "L_%p .functor %s %u", net, muxz, width);
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fprintf(vvp_out, ", L_%p/%d/0", net, swidth-2);
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fprintf(vvp_out, ", L_%p/%d/1", net, swidth-2);
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fprintf(vvp_out, ", L_%p/%ds", net, swidth-1);
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fprintf(vvp_out, ", C4<>;\n");
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free(select_input);}
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free(select_input);
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}
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void draw_lpm_mux(ivl_lpm_t net)
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{
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const char*muxz = "MUXZ";
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/* The output of the mux defines the type of the mux. the
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ivl_target should guarantee that all the inputs are the
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same type as the output. */
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switch (data_type_of_nexus(ivl_lpm_q(net,0))) {
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case IVL_VT_REAL:
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muxz = "MUXR";
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break;
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default:
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muxz = "MUXZ";
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break;
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}
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if ((ivl_lpm_size(net) == 2) && (ivl_lpm_selects(net) == 1)) {
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draw_lpm_mux_ab(net);
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draw_lpm_mux_ab(net, muxz);
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return;
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}
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/* Here we are at the worst case, we generate a tree of MUXZ
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devices to handle the arbitrary size. */
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draw_lpm_mux_nest(net);
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draw_lpm_mux_nest(net, muxz);
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}
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/*
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* $Log: draw_mux.c,v $
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* Revision 1.12 2005/09/01 04:11:37 steve
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* Generate code to handle real valued muxes.
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*
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* Revision 1.11 2005/08/27 04:32:08 steve
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* Handle synthesis of fully packed case statements.
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*
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@ -19,7 +19,7 @@
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
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*/
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#ifdef HAVE_CVS_IDENT
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#ident "$Id: vvp_priv.h,v 1.32 2005/08/06 17:58:16 steve Exp $"
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#ident "$Id: vvp_priv.h,v 1.33 2005/09/01 04:11:37 steve Exp $"
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#endif
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# include "vvp_config.h"
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@ -49,6 +49,9 @@ extern const char* vvp_signal_label(ivl_signal_t sig);
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*/
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extern const char* vvp_memory_label(ivl_memory_t mem);
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extern unsigned width_of_nexus(ivl_nexus_t nex);
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extern ivl_variable_type_t data_type_of_nexus(ivl_nexus_t nex);
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/*
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* This function draws a process (initial or always) into the output
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* file. It normally returns 0, but returns !0 of there is some sort
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@ -198,6 +201,9 @@ extern unsigned thread_count;
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/*
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* $Log: vvp_priv.h,v $
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* Revision 1.33 2005/09/01 04:11:37 steve
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* Generate code to handle real valued muxes.
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*
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* Revision 1.32 2005/08/06 17:58:16 steve
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* Implement bi-directional part selects.
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*
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