Write C for ARM

下载资料简介：
Table of Contents
1 Introduction 2
2 Setting Compiler Options 3
2.1 Selecting processor/architecture 3
2.2 Debugging options 3
2.3 Optimization options 4
2.4 APCS options 4
3 Division and Remainder 6
3.1 Combining division and remainder 6
3.2 Division and remainder by powers of two 7
3.3 Alternatives to remainder for modulo arithmetic 7
3.4 Division by a constant 8
3.5 Using lookup tables 8
4 Conditional Execution 9
5 Boolean Expressions 10
5.1 Range checking 10
5.2 Compares with zero 11
6 Loops 12
6.1 Loop termination 12
6.2 Loop unrolling 13
7 Switch Statement 14
7.1 Switch statement vs. lookup tables 14
8 Register Allocation 16
8.1 Register allocatable variables 16
8.2 Aliasing 16
8.3 Live variables and spilling 20
9 Variable Types 21
9.1 Local variables 21
9.2 Use of shorts/signed bytes on ARM 22
9.3 Space occupied by global data 22
10 Function Design 23
10.1 Function call overhead 23
10.2 Leaf functions 25
10.3 Tail continued functions 26
10.4 Pure functions 27
10.5 Inline functions 28
10.6 Function definitions 29
11 Using Lookup Tables 30
12 Floating-Point Arithmetic 31
13 Cross Jump Optimization 32
14 Portability of C Code 33
15 Further Information

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