93 lines
3.5 KiB
C
93 lines
3.5 KiB
C
#ifndef __device_H
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#define __device_H
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/*
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* Copyright (c) 2005-2010 Stephen Williams
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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# include <ivl_target.h>
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/*
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* This code generator supports a variety of device types. It does
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* this by keeping a device "driver" structure for each device
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* type. The device structure contains pointers to functions that emit
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* the proper XNF for a given type of device.
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*
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* If a device supports a method, the function pointer is filled in
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* with a pointer to the proper function.
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*
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* If a device does not support the method, then the pointer is null.
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*/
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typedef const struct device_s* device_t;
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struct device_s {
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/* These methods draw leading and trailing format text. */
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void (*show_header)(ivl_design_t des);
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void (*show_footer)(ivl_design_t des);
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/* Draw scopes marked by ivl_synthesis_cell */
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void (*show_cell_scope)(ivl_scope_t net);
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/* Draw pads connected to the specified signal. */
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void (*show_pad)(ivl_signal_t sig, const char*str);
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/* Draw basic logic devices. */
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void (*show_logic)(ivl_net_logic_t net);
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/* This method emits a D type Flip-Flop */
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void (*show_dff)(ivl_lpm_t net);
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/* These methods show various comparators */
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void (*show_cmp_eq)(ivl_lpm_t net);
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void (*show_cmp_ne)(ivl_lpm_t net);
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void (*show_cmp_ge)(ivl_lpm_t net);
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void (*show_cmp_gt)(ivl_lpm_t net);
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/* This method draws MUX devices */
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void (*show_mux)(ivl_lpm_t net);
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/* This method draws ADD devices */
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void (*show_add)(ivl_lpm_t net);
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void (*show_sub)(ivl_lpm_t net);
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/* These methods draw SHIFT devices */
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void (*show_shiftl)(ivl_lpm_t net);
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void (*show_shiftr)(ivl_lpm_t net);
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/* Multipliers */
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void (*show_mult)(ivl_lpm_t net);
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/* Constants */
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void (*show_constant)(ivl_net_const_t net);
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};
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/*
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* Return the device_t cookie given the name of the architecture. If
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* the device is not found, return 0.
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*
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* This function is used if the user specifies the architecture
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* explicitly, with the -parch=name flag.
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*/
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extern device_t device_from_arch(const char*arch);
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/*
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*/
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extern const struct device_table_s {
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const char*name;
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device_t driver;
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} edif_device_table[];
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#endif
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