Level Epsilon Architecture Support Reference Manual

Contents
Numeric-Interpretation Operators ..................................... 5–19
Bit Vector Interpretation .................................................... 5–29
Linear Index-Function Operator ......................................... 5–39
Reference Generation and Evaluation Operators ............................... 5–41
Double Precision ................................................................ 5–41
Stack References .............................................................. 5–41
Environment Link Evaluation ............................................. 5–41
Evaluation of References ................................................... 5–41
Reference Generation Operators ...................................... 5–44
Reference Modification Operators .................................... 5–50
Descriptor Attribute Extraction Operators ......................... 5–51
Read Evaluation Operators ................................................ 5–52
Normal Store Operators .................................................... 5–59
Overwrite Operators .......................................................... 5–61
Character Reference Evaluation Operators ....................... 5–63
Processor State Operators .................................................................. 5–65
Code Stream Pointer Distribution ...................................... 5–65
Branching Operators .......................................................... 5–65
Stack Frame Operators ...................................................... 5–67
Assertion Operators .......................................................... 5–73
Top-Of-Stack Operators ..................................................... 5–73
Processor-State Manipulation Operators .......................... 5–75
Data Array Operators .......................................................................... 5–77
Paged Array Operations ..................................................... 5–77
Searching Operators .......................................................... 5–78
Pointer Operators .............................................................. 5–80
Vector Operators ............................................................. 5–109
Miscellaneous Operators .................................................................. 5–121
Program Restrictions Due to Hidden State ....................................... 5–122
Section 6. Restricted Operators
Restricted General Operators ............................................................... 6–1
Restricted Reference Operators.......................................... 6–1
Program Restrictions Due to Hidden State ......................... 6–3
Restricted Processor State Operators ................................. 6–4
Restricted Task Control Operators ...................................... 6–8
Restricted Time of Day Operators ..................................... 6–10
Restricted Platform Operators ............................................................ 6–11
Restricted Memory Access Functions .............................. 6–11
Restricted System Interrupt Functions ............................. 6–15
Restricted Time of Day Functions (Libra 6xx and
7xx Systems) ................................................................. 6–21
Time Management (Libra 4000 System) ........................... 6–23
System-Specific Platform Support Operator ..................... 6–26
Restricted I/O Support Operator........................................ 6–27
Restricted Word Extension Operators ................................................ 6–28
Appendix A. Alphabetical Operator Code List
6878 7530–007 v