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Solaris Studio 12.4: Numerical Computation Guide
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Updated: January 2015
Oracle
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Solaris Studio 12.4: Numerical Computation Guide
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Chapter 1 Introduction
1.1 Floating-Point Environment
Chapter 2 IEEE Arithmetic
2.1 IEEE Arithmetic Model
2.1.1 What Is IEEE Arithmetic?
2.2 IEEE Formats
2.2.1 Storage Formats
2.2.2 Single Format
2.2.3 Double Format
2.2.4 Quadruple Format
2.2.5 Double-Extended Format (x86)
2.2.6 Ranges and Precisions in Decimal Representation
2.2.7 Base Conversion in the Oracle Solaris Environment
2.3 Underflow
2.3.1 Underflow Thresholds
2.3.2 How Does IEEE Arithmetic Treat Underflow?
2.3.3 Why Gradual Underflow?
2.3.4 Error Properties of Gradual Underflow
2.3.5 Two Examples of Gradual Underflow Versus Abrupt Underflow
2.3.6 Does Underflow Matter?
2.4 IEEE Standard 754-2008
Chapter 3 The Math Libraries
3.1 Oracle Solaris Math Libraries
3.1.1 Standard Math Library
3.1.2 Vector Math Library
3.2 Oracle Solaris Studio Math Libraries
3.2.1 Oracle Math Library
3.2.2 Optimized Libraries
3.3 Single, Double, and Extended/Quadruple Precision
3.4 IEEE Support Functions
3.4.1 ieee_functions(3m) and ieee_sun(3m)
3.4.2 ieee_values(3m)
3.4.3 ieee_flags(3m)
3.4.4 ieee_retrospective(3m)
3.4.5 nonstandard_arithmetic(3m)
3.5 C99 Floating-Point Environment Functions
3.5.1 Exception Flag Functions
3.5.2 Rounding Control
3.5.3 Environment Functions
3.6 Implementation Features of libm and libsunmath
3.6.1 About the Algorithms
3.6.2 Argument Reduction for Trigonometric Functions
3.6.3 Data Conversion Routines
3.6.4 Random Number Facilities
Chapter 4 Exceptions and Exception Handling
4.1 Exception Handling Objectives
4.2 What Is an Exception?
4.2.1 Notes for Table 4-1
4.3 Detecting Exceptions
4.3.1 ieee_flags(3m)
4.3.2 C99 Exception Flag Functions
4.4 Locating an Exception
4.4.1 Using the Debugger to Locate an Exception
4.4.1.1 Using dbx to Locate the Instruction Causing an Exception
4.4.1.2 Enabling Traps Without Recompilation
4.4.2 Using a Signal Handler to Locate an Exception
4.4.2.1 ieee_handler (3m)
4.4.2.2 Reporting an Exception From a Signal Handler
4.4.3 Using libm Exception Handling Extensions to Locate an Exception
4.4.3.1 fex_set_handling(3m)
4.4.3.2 Retrospective Diagnostics
4.5 Handling Exceptions
4.5.1 Substituting IEEE Trapped Under/Overflow Results
Chapter 5 Compiler Code Generation
5.1 Supported Operation Systems, Hardware, and Memory Model
5.2 Code Generation Options
5.3 Default Address Model and Code Generation
5.4 Compilation Options
5.5 Reproducible Results
5.5.1 Transcendental Functions
5.5.2 Associative Operations
5.5.3 Indeterminate Evaluation
5.5.4 Non-Portable Types
5.5.5 Implicit Higher Precision
5.6 Independent Confirmation
Appendix A Examples
A.1 IEEE Arithmetic
A.2 The Math Libraries
A.2.1 Random Number Generator
A.2.2 IEEE Recommended Functions
A.2.3 IEEE Special Values
A.2.4 ieee_flags — Rounding Direction
A.2.5 C99 Floating-Point Environment Functions
A.3 Exceptions and Exception Handling
A.3.1 ieee_flags — Accrued Exceptions
A.3.2 ieee_handler: Trapping Exceptions
A.3.3 ieee_handler: Abort on Exceptions
A.3.4 libm Exception Handling Features
A.3.5 Using libm Exception Handling With Fortran Programs
A.4 Miscellaneous
A.4.1 sigfpe: Trapping Integer Exceptions
A.4.2 Calling Fortran From C
A.4.3 Useful Debugging Commands
Appendix B SPARC Behavior and Implementation
B.1 Floating-Point Hardware
B.1.1 Floating-Point Status Register and Queue
B.1.2 Special Cases Requiring Software Support
B.1.2.1 IEEE Floating-Point Exceptions, NaNs, and Infinities
B.1.2.2 Subnormal Numbers and Nonstandard Arithmetic
B.1.2.3 Nonstandard Arithmetic and Kernel Emulation
B.2 fpversion(1) Function: Finding Information About the FPU
Appendix C x86 Behavior and Implementation
C.1 Code Generation for Supported Systems
C.2 Differences from SPARC
Appendix D Addendum to What Every Computer Scientist Should Know About Floating-Point Arithmetic
D.1 Differences Among IEEE 754 Implementations
D.1.1 Current IEEE 754 Implementations
D.1.2 Pitfalls in Computations on Extended-Based Systems
D.1.2.1 Theorem 7'
D.1.2.2 Proof
D.1.3 Programming Language Support for Extended Precision
D.1.4 Conclusion
Appendix E Standards Compliance
E.1 libm Special Cases
E.1.1 Other Compiler Flags Affecting Standard Conformance
E.1.2 Additional Notes on C99 Conformance
E.2 LIA-1 Conformance
E.2.1 a. TYPES (LIA 5.1):
E.2.2 b. PARAMETERS (LIA 5.1):
E.2.3 d. DIV/REM/MOD (LIA 5.1.3):
E.2.4 i. NOTATION (LIA 5.1.3):
E.2.5 j. EXPRESSION EVALUATION:
E.2.6 k. METHOD OF OBTAINING PARAMETERS:
E.2.7 n. NOTIFICATION:
E.2.8 o. SELECTION MECHANISM:
Appendix F References
F.1 Chapter 2: “IEEE Arithmetic”
F.2 Chapter 3: “The Math Libraries”
F.3 Chapter 4: “Exceptions and Exception Handling”
F.4 Standards
F.5 Test Programs
Glossary
Index
Index Numbers and Symbols
Index A
Index B
Index C
Index D
Index E
Index F
Index G
Index I
Index L
Index N
Index O
Index P
Index Q
Index R
Index S
Index T
Index U
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examine the accrued exception bits
C example
ieee_flags — Accrued Exceptions
examine the accrued exception flags
C example
Examining the Accrued Exception Flags
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