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#include <svdpi.h> in the C
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non context functions with output/inout instantiated more than once will crash
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imported tasks always return a void value
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context required for functions with output/input arguments
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imported functions can retun a result or be a void function
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svLogic/svLogicVecVal are 4 states elements
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svLogicVecVal is 32 bits only
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vectors >32 bits will require use of mda in C
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SV int sized array will be passed seamlessly
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Ex: int a[2][2] in SV is mapped with const int[2][2]
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logic array mapped with const svLogicVecVal array
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unpacked struct will be redefined in the C like in the SV
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pure functions can be removed or replaced by simulator to optimize objects, previous values computed for given argument values can be reused
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pure functions have their result depending exclusively on their input arguments
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ONLY non-void functions without output/inout can be pure
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pure functions cannot perform fileoperations, read/write i/o,env variables, OS/program/process/shared memory objects, glocal/static variables
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implicit scope for context methods
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SV methods from other scopes can be called after modifying current scope
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svSetScope to modify current scope
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svGetScope to retrieve current scope
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svGetNameFromScope
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svGetScopeFromName
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dimension unspecified a[][]
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Not a dynamic array!!
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limited to single packed dimension
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C code access through query functions
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svLeft, svRight, svLow,svHigh,svIncrement,svSize, svDimention
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Access functions: svGetArrayPtr/ svSizeOfArray/ svGetArrElemPtr{,1,2,3}
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SV
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C input
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C output/inout
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description
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int
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int
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int*
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int passed by value
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reg/logic
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svLogic
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svLogic*
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reg/logic passed by value
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shortint
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short int
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short int*
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shortint(16 bits) passed by value
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longint
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long int
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long int*
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longint (64bits) passed by value
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real
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double
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double*
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real passed by value
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string
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char*
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char**
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string passed by value
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SV
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C input
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C output/inout
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description
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logic/reg[]
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svLogicVecVal
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svLogicVecVal*
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logic vector passed by value
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bit[]
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const svBitVecVal*
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svBitVecVal*
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bit vector assed by value
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open array(import only)
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const svOpenArrayHandle
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svOpenArrayHandle
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array passed by value
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chandle
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const void*
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void*
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allows C to allocate memory
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Exported methods have only the routine name
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No argument or return type!!
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Map SV method name if it conflicts with exisiting C name :
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in C use "extern" keyword
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export "DPI-C" yoman = function hellosir;
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extern void morning(int,int*)
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