Zilog Z80380 Manuale Utente Pagina 27
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UM004001-COR1103 1–15
Introduction Sample Session
Configuring Optimization Levels
The C-Compiler Optimizations page allows the user to select an optimization level for the C-
compiler. See
Optimization Levels on page 2-9 for a detailed description of the different opti-
mization levels.
Perform the following steps to configure the Optimizations page .
1. Select Optimizations from the Category pop-up list in the C-Compiler Settings Options
dialog box. The Optimizations page appears.
2. Select Level 4 optimization.
3. Click Apply.
FIGURE 1-8. C-COMPILER OPTIMIZATIONS PAGE
The following optimization levels are available in the C-Compiler Optimizations page.
• The No optimization option disables all optimizations.
• The Level 1 optimization option performs:
– constant folding
– dead object removal
– simple jump optimization
- 380 C-Compiler 1
- User’s Manual 1
- 380 C-COMPILER USER’S MANUAL 3
- ABOUT THIS MANUAL 3
- TABLE OF CONTENTS 5
- Chapter 3 6
- Linking Files 6
- Chapter 4 7
- Run Time Environment 7
- LIST OF TABLES 9
- LIST OF FIGURES 11
- CHAPTER 1 13
- INTRODUCTION 13
- ZDS ENVIRONMENT 14
- RUN-TIME MODEL 15
- MINIMUM REQUIREMENTS 15
- INSTALLING THE 380 C-COMPILER 16
- REGISTRY KEYS 16
- INSTALLING ZDS 17
- SAMPLE SESSION 18
- UM004001-COR1103 1–7 19
- Introduction Sample Session 19
- Sample Session Introduction 20
- 1–8 UM004001-COR1103 20
- Create a File 20
- • Target settings 21
- 1–10 UM004001-COR1103 22
- CONFIGURE SETTINGS 23
- • Warnings 24
- • Optimization levels 24
- UM004001-COR1103 1–13 25
- 1–14 UM004001-COR1103 26
- Configuring Warnings 26
- UM004001-COR1103 1–15 27
- 1–16 UM004001-COR1103 28
- 1–18 UM004001-COR1103 30
- Code Generation Configuration 30
- COMPILING AND DOWNLOADING 31
- COMPILE A PROJECT 31
- DOWNLOADING A COMPILED FILE 32
- TECHNICAL SUPPORT 33
- OVERVIEW 35
- LANGUAGE EXTENSIONS 36
- ASSIGNING TYPES 36
- DEFAULT MEMORY QUALIFIERS 36
- POINTERS 37
- SIZE OF POINTERS 37
- I/O ADDRESS SPACES 37
- ACCCESING I/O ADDRESS SPACE 38
- INTERRUPT FUNCTIONS 39
- USING THE DOS COMMAND LINE 40
- COMMAND LINE FORMAT 40
- COMMAND LINE SWITCHES 41
- COMMAND LINE EXAMPLES 42
- • Level 1 optimization 43
- • Level 2 optimization 43
- LEVEL 2 OPTIMIZATIONS 44
- LEVEL 3 OPTIMIZATIONS 45
- LEVEL 4 OPTIMIZATIONS 45
- UNDERSTANDING ERRORS 45
- ENABLING WARNING MESSAGES 45
- INCLUDED FILES 46
- PREDEFINED NAMES 46
- GENERATED ASSEMBLY FILE 46
- OBJECT SIZES 46
- • Code Section (.text) 47
- INCORPORATING ASSEMBLY WITH C 48
- INCORPORATING C WITH ASSEMBLY 48
- UM004001-COR1103 2–15 49
- Referenced C file 49
- CHAPTER 3 51
- LINKING FILES 51
- • COFF Format Executable File 53
- RUN TIME INITIALIZATION FILE 54
- INSTALLED FILES 54
- INVOKING THE LINKER 54
- USING THE LINKER IN ZDS 54
- LINKER SYMBOLS 56
- LINKER COMMAND FILE 57
- 3–8 UM004001-COR1103 58
- Linker Command DEFINE 58
- LINKER COMMAND LINE 60
- COMMAND LINE SPECIFICATIONS 61
- LINKER COMMAND LINE OPTIONS 62
- USING THE LIBRARIAN 63
- COMMAND LINE OPTIONS 64
- RUN TIME ENVIRONMENT 65
- CHAPTER 4 65
- IGURE 4-1. FRAME LAYOUT 66
- USING THE RUN-TIME LIBRARY 67
- LIBRARY FUNCTIONS 69
- _asm FUNCTION 69
- abs FUNCTION 69
- atof, atoi, atol FUNCTIONS 70
- FUNCTION 71
- FUNCTIONS 71
- 4–8 UM004001-COR1103 72
- Parameter Description 72
- srand FUNCTION 77
- UM004001-COR1103 4–23 87
- Return Value 87
- 4–26 UM004001-COR1103 90
- APPENDIX A 91
- LINK FILE 93
- APPENDIX B 95
- APPENDIX C 101
- GLOSSARY 103
- Glossary 104
- Glossary-2 UM004001-COR1103 104
- UM004001-COR1103 Glossary-3 105
- Glossary-4 UM004001-COR1103 106
- UM004001-COR1103 Glossary-5 107
- Glossary-6 UM004001-COR1103 108
- UM004001-COR1103 Glossary-7 109
- Glossary-8 UM004001-COR1103 110
- UM004001-COR1103 Glossary-9 111
- Glossary-10 UM004001-COR1103 112
- UM004001-COR1103 Glossary-11 113
- UM004001-COR1103 Index-1 115
- Index-2 UM004001-COR1103 116
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