Table of Contents
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4.5.4
OC Data Array ..................................................................................................... 78
4.6
Store Queues ..................................................................................................................... 79
4.6.1
SQ Configuration................................................................................................. 79
4.6.2
SQ Writes............................................................................................................. 79
4.6.3
Transfer to External Memory............................................................................... 79
4.6.4
SQ Protection....................................................................................................... 81
Section 5
5.1
Overview........................................................................................................................... 83
5.1.1
Features................................................................................................................ 83
5.1.2
Register Configuration......................................................................................... 83
5.2
Register Descriptions ........................................................................................................ 84
5.3
Exception Handling Functions.......................................................................................... 85
5.3.1
Exception Handling Flow .................................................................................... 85
5.3.2
Exception Handling Vector Addresses ................................................................ 85
5.4
Exception Types and Priorities ......................................................................................... 86
5.5
Exception Flow ................................................................................................................. 88
5.5.1
Exception Flow .................................................................................................... 88
5.5.2
Exception Source Acceptance.............................................................................. 89
5.5.3
Exception Requests and BL Bit ........................................................................... 91
5.5.4
Return from Exception Handling......................................................................... 91
5.6
Description of Exceptions................................................................................................. 91
5.6.1
Resets................................................................................................................... 92
5.6.2
General Exceptions .............................................................................................. 97
5.6.3
Interrupts.............................................................................................................. 111
5.6.4
Priority Order with Multiple Exceptions ............................................................. 114
5.7
Usage Notes ...................................................................................................................... 115
5.8
Restrictions ....................................................................................................................... 116
Section 6
6.1
Overview........................................................................................................................... 117
6.2
Data Formats..................................................................................................................... 117
6.2.1
Floating-Point Format.......................................................................................... 117
6.2.2
Non-Numbers (NaN) ........................................................................................... 119
6.2.3
Denormalized Numbers ....................................................................................... 120
6.3
Registers............................................................................................................................ 121
6.3.1
Floating-Point Registers....................................................................................... 121
6.3.2
Floating-Point Status/Control Register (FPSCR)................................................. 123
6.3.3
Floating-Point Communication Register (FPUL) ................................................ 124
6.4
Rounding........................................................................................................................... 124
6.5
Floating-Point Exceptions................................................................................................. 125
6.6
Graphics Support Functions.............................................................................................. 126
6.6.1
Geometric Operation Instructions........................................................................ 126
........................................................................................................ 83
........................................................................................ 117
Rev. 4.0, 04/00, page xi of 20
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