 C166 User's Guide | |
| Home Products Events Support | |
On-Line Manuals
C166 User's Guide
C166 Introduction Compiling Programs Language Extensions Preprocessor Advanced Programming Sections, Classes, and Groups
Special Sections Locating Sections Customization Files Startup Code STARTUP.A66 START167.A66 Basic I/O Memory Allocation TRAPS.C Optimizer Optimizer Options General Optimizations 80C166-Specific Optimizations Global Register Coloring DPP Registers Stacks System Stack User Stack Stack Sizes System Stack Size User Stack Size XBUS Memory and Peripherals On-chip XRAM XBUS Peripherals Interfacing C to Assembler Function Parameters Function Return Values Using the SRC Directive Register Usage Example Routines TINY Model SMALL Model COMPACT Model MEDIUM Model LARGE Model Data Storage Formats Bit Variables 1-byte Scalars 2-byte Scalars 4-byte Scalars float Scalars float Errors double Scalars double Errors near Pointers far Pointers huge Pointers xhuge Pointers Absolute Memory Access Absolute Access Macros Linker Location Controls Debugging Error Messages Library Reference Appendixdouble Errors
The C16x/ST10/XC16x does not contain an interrupt vector to trap floating-point errors. Therefore, your software must be prepared to respond to these error conditions.
In addition to the normal floating-point values, a double number can contain a binary error value. Binary error values are defined as a part of the IEEE standard and used whenever an error occurs during normal processing of floating-point operations. Your code should check for possible arithmetic errors at the end of each floating-point operation.
| Name | Value | Meaning |
|---|---|---|
| NaN | 0xFFFFFFF FFFFFFFF | Not a number |
| +INF | 0x7FF0000 00000000 | Positive infinity (positive overflow) |
| -INF | 0xFFF0000 00000000 | Negative infinity (negative overflow) |
Note
- The C166 library function _chkdouble_ allows you to quickly check the floating-point status of double numbers.
| Contact Site Map Press Privacy | Copyright © 2008 Keil™, An ARM® Company. All rights reserved. |
