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User's Manual - chipdb.org

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12<br />

6.3.9 XContext Register (20)...............................................................176<br />

6.3.10 Parity Error (PErr) Register (26) ................................................178<br />

6.3.11 Cache Error (CacheErr) Register (27)........................................178<br />

6.3.12 Error Exception Program Counter (Error EPC)<br />

Register (30) ...............................................................................179<br />

6.4 Exception Details ......................................................................180<br />

6.4.1 Exception Types .........................................................................180<br />

6.4.2 Exception Vector Locations .......................................................180<br />

6.4.3 Priority of Exceptions.................................................................182<br />

6.4.4 Cold Reset Exception .................................................................183<br />

6.4.5 Soft Reset Exception ..................................................................184<br />

6.4.6 Non-Maskable Interrupt (NMI) Exception.................................185<br />

6.4.7 Address Error Exception ............................................................186<br />

6.4.8 TLB Exceptions..........................................................................187<br />

6.4.9 Bus Error Exception ...................................................................190<br />

6.4.10 System Call Exception ...............................................................191<br />

6.4.11 Breakpoint Exception .................................................................192<br />

6.4.12 Coprocessor Unusable Exception...............................................193<br />

6.4.13 Reserved Instruction Exception..................................................194<br />

6.4.14 Trap Exception ...........................................................................195<br />

6.4.15 Integer Overflow Exception .......................................................196<br />

6.4.16 Floating-Point Exception............................................................197<br />

6.4.17 Watch Exception ........................................................................198<br />

6.4.18 Interrupt Exception.....................................................................199<br />

6.5 Exception Handling and Servicing Flowcharts .....................200<br />

Chapter 7 Floating-Point Operations.........................................207<br />

7.1 Overview....................................................................................208<br />

7.2 FPU Programming Model .......................................................208<br />

7.2.1 Floating-Point General Purpose Register (FGR)........................208<br />

7.2.2 Floating-Point Registers (FPR) ..................................................210<br />

7.2.3 Floating-Point Control Registers (FCRs) ...................................211<br />

7.2.4 Control/Status Register (FCR31) ...............................................211<br />

7.2.5 Implementation/Revision Register (FCR0)................................216<br />

7.3 Floating-Point Formats............................................................217<br />

User’s <strong>Manual</strong> U10504EJ7V0UM00

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