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Synopsys:
peekl NENC,ENDIAN,BITS
Given an IOS descriptor and a bit-offset, peek a long value of width BITS bits. The negative encoding and endianness to be used are specified in the instruction arguments.
If there is a problem performing the operation, this function pushes an exception in the stack. Otherwise, it pushes the peeked value and PVM_NULL.
Stack: ( INT ULONG -- [LONG] EXCEPTION|null )