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MPLAB® XC32 C/C++ Compiler User's Guide for PIC32M MCUs
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12
Fixed-Point Arithmetic Support
12.13
Mixed-Mode Operations
Notice to Development Tools Customers
1
Preface
2
Compiler Overview
3
How To's
4
XC32 Toolchain and MPLAB X IDE
5
Command-line Driver
6
ANSI C Standard Issues
7
Device-Related Features
8
Code Coverage
9
Supported Data Types and Variables
10
Memory Allocation and Access
11
Floating-point Support
12
Fixed-Point Arithmetic Support
12.1
Enabling Fixed-Point Arithmetic Support
12.2
Data Types
12.3
Fixed-point Library Functions
12.4
Integer Representations
12.5
SIMD Variables
12.6
Accessing Elements in SIMD Variables
12.7
Array Alignment and Data Layout
12.8
Operations on Fixed-Point Variables
12.9
Operations on SIMD Variables
12.10
DSP Built-In Functions
12.11
DSP Control Register
12.12
Using Accumulators
12.13
Mixed-Mode Operations
12.13.1
Multiply "32-bit int * 32-bit int = 64-bit long long int"
12.13.2
Multiply and Add "32-bit int * 32-bit int + 64-bit long long = 64-bit long long int"
12.14
Auto-Vectorization to SIMD
12.15
FIR Filter Example Project
12.16
Unsupported Features
13
Operators and Statements
14
Register Usage
15
Stack
16
Functions
17
Interrupts
18
Main, Runtime Start-up and Reset
19
Library Routines
20
Mixing C/C++ and Assembly Language
21
Optimizations
22
Preprocessing
23
Linking Programs
24
Embedded Compiler Compatibility Mode
25
Common C Interface
26
C Implementation-Defined Behavior
27
C++ Implementation-Defined Behavior
28
Deprecated Features
29
Built-In Functions
30
Built-In DSP Functions
31
PIC32 DSP Library
32
PIC32 Debug-Support Library
33
DSP Wrapper Functions
34
ASCII Character Set
35
Document Revision History
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12.13 Mixed-Mode Operations
