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Synopsys:
peeklu ENDIAN,BITS
Given an IOS descriptor and a bit-offset, peek an unsigned long value of width BITS bits. The endianness to be used is 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 -- [ULONG] EXCEPTION|null )