61 lines
1.8 KiB
C
61 lines
1.8 KiB
C
// Copyright 2020 Google LLC
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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// Based on http://en.wikipedia.org/wiki/Verilog_Procedural_Interface.
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//
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// Simple VPI plug-in to test the toolchain.
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#include "vpi_user.h"
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// Implements the increment system task
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static PLI_INT32 increment(PLI_BYTE8 *userdata) {
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// Obtains a handle to the argument list
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vpiHandle systfref = vpi_handle(vpiSysTfCall, NULL);
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vpiHandle args_iter = vpi_iterate(vpiArgument, systfref);
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// Grabs the value of the first argument
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vpiHandle argh = vpi_scan(args_iter);
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struct t_vpi_value argval;
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argval.format = vpiIntVal;
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vpi_get_value(argh, &argval);
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int value = argval.value.integer;
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vpi_printf("Input %d\n", value);
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// Increments the value and puts it back as first argument
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argval.value.integer = value + 1;
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vpi_put_value(argh, &argval, NULL, vpiNoDelay);
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// Cleans up and returns.
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vpi_free_object(args_iter);
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return 0;
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}
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// Registers the $increment task with the system.
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static void registerIncrementTask() {
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s_vpi_systf_data task;
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task.type = vpiSysTask;
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task.tfname = "$increment";
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task.calltf = increment;
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task.compiletf = 0;
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vpi_register_systf(&task);
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}
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// Registers the new system task here.
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void (*vlog_startup_routines[]) () = {
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registerIncrementTask,
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0
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};
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