Intel iapx 432 manual IP Operators

CI3JECrS AND OPERATORS

Table 2-1 IP/GOP System Object Comparison

Object	IP Implementation-
Processor Object	similar
Process Obj ect	similar
Context Object	similar
Operand Stack	none
Instruction Segment	none
Object Table	identical
IkInain	identical
Port	identical
Carrier	identical
Storage Resource	none
Type Definition	identical
Communication Segment	identical
Descriptor Controller	identical
Refinement Controller	identical

Legend:
identical	IP and GOP ~lementations are identical
similar	While conceptually similar, IP implements object
	differently than GOP
none	IP does not implement object

IP OPERATORS

Table 2-2compares the operators available in the IP's function set to those provided in the GOP's instruction set. Since windows are unique to Interface Processors, the ALTER MAP AND SELECr DATA SEGMENT function has no counterpart in the GOP. Conversely, the IP has no functions for performing arithmetic (except for the exclusion function INDIVISIBLE ADD SHORI' ORDINAL) or logical operations on numeric or character data types, nor any operators to alter the flow of execution (e.g., branch or call functions). To the extent that these classes of operators are needed in a Peripheral Subsystem interface, they can be provined by the cornbinatlon of the Attached

Processor's instruction set and the IP's window facility. For example, by opening a windCM on a message received fran a GOP process, the I/O controller can use AP instructions to test and branch on the value of a message field read through the window.

2-3