78IV datasheet(15/523 Pages) NEC

15 / 523 page

User’s Manual U15556EJ1V0UM

(2)

Location and order of storing arguments...................................................................... 463

(3)

Location and order of storing automatic variables........................................................ 465

11.7.5

Pascal function call interface................................................................................................. 467

CHAPTER 12 REFERENCING THE ASSEMBLER .......................................................................470

12.1 Accessing Arguments/Automatic Variables ....................................................................471

12.2 Storing Return Values ........................................................................................................474

12.3 Calling an Assembly Language Routine from C..............................................................475

(1)

Calling an assembly language routine function (C source) ........................................................ 475

(2)

Saving and restoring the information of assembly language routine (assembler source) ......... 476

12.4 Calling C Language Routine from Assembly Language Routine ..................................479

(1)

Calling a C language function from assembly language (assembler source)............................. 479

12.5 Referencing Variables Defined by Other Languages ......................................................481

(1)

How to refer to C-defined variables ............................................................................................ 481

(2)

How to refer to assembler-defined variables from C .................................................................. 482

12.6 Other Important Hints .........................................................................................................483

(1)

“_” (underscore).......................................................................................................................... 483

(2)

Placement of arguments on the stack ........................................................................................ 483

CHAPTER 13 EFFECTIVE UTILIZATION OF COMPILER...........................................................484

13.1 Efficient Coding...................................................................................................................484

(1)

Using external variables ............................................................................................................. 485

(2)

1-bit data .................................................................................................................................... 485

(3)

Function definitions .................................................................................................................... 486

(4)

Optimization option..................................................................................................................... 486

(5)

Using extended functions ........................................................................................................... 487

APPENDIX A LIST OF LABELS FOR saddr AREA...................................................................490

A.1

Arguments of norec Functions..........................................................................................490

A.2

Automatic variables of norec Functions ..........................................................................491

A.3

Register Variables...............................................................................................................491

APPENDIX B LIST OF SEGMENT NAMES ..................................................................................492

B.1

List of Segment Names ......................................................................................................494

B.1.1

Program area and data area ................................................................................................. 494

B.1.2

Flash memory area ............................................................................................................... 498

B.2

Location of Segment ..........................................................................................................500

B.3

Example of C Source ..........................................................................................................501

B.4

Example of Output Assembler Module .............................................................................502

APPENDIX C LIST OF RUNTIME LIBRARIES .............................................................................505

APPENDIX D LIST OF LIBRARY STACK CONSUMPTION .......................................................510

APPENDIX E INDEX .........................................................................................................................517

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