Section 26.4.4

LRM-363

Changes (add bold red ; to end of production):

dpi_import_export ::= // from Annex A.2.6

import "DPI" [ dpi_import_property ] [ c_identifier = ] dpi_function_proto;

LRM-361

Changes:

The following are examples of external declarations.

import "DPI" function void myInit();

// from standard math library

import "DPI" pure function real sin(real);

// from standard C library: memory management

import "DPI" function chandle malloc(int size); // standard C function

import "DPI" function void free(chandle ptr); // standard C function

// abstract data structure: queue

import "DPI" function chandle newQueue(input string name_of_queue);

// Note the following import uses the same foreign function for

// implementation as the prior import, but has different SystemVerilog name

// and provides a default value for the argument.

import "DPI" newQueue=function chandle newAnonQueue(input string s=null);

import "DPI" function chandle newElem(bit [15:0]);

import "DPI" function void enqueue(chandle queue, chandle elem);

import "DPI" function chandle dequeue(chandle queue);

// miscellanea

import "DPI" function bit [15:0] getStimulus();

import "DPI” context function void processTransaction(chandle elem,

output logic [64:1] arr [0:63]);

Section 26.4.5

LRM-362

Changes:

Function result types are restricted to small values. The following SystemVerilog data types are allowed for imported function results:

— void, byte, shortint, int, longint, real, shortreal, chandle, and string.

— packed bit arrays up to 32 bits and all types that are eventually equivalent to packed bit arrays up to 32 bits.

The same restrictions apply for the result types of exported functions.

Section 26.6

LRM-363

Changes (add bold red ; to end of production):

dpi_import_export ::= // from Annex A.2.6

| export "DPI" [ c_identifier = ] function function_identifier;