SW006015 Microchip Technology, SW006015 Datasheet - Page 61

• Manufacturer Part Number: SW006015
• Description: C COMPILER MPLAB C32
• Manufacturer: Microchip Technology
• Type: Compilerr
• Series: PIC32r

Specifications of SW006015

• Supported Families: PIC32MX5, MX6, And MX7
• Core Architecture: PIC
• Kit Contents: Software And Docs
• Mcu Supported Families: PIC32 MCUs
• Tool Function: Compiler
• Supported Devices: PIC32 MCUs
• Tool Type: Compiler
• Processor Series: PIC32
• Lead Free Status / RoHS Status: Not applicable / Not applicable
• For Use With/related Products: PIC32
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

5.1
5.2
5.3
© 2007 Microchip Technology Inc.
INTRODUCTION
HIGHLIGHTS
REGISTER CONVENTIONS
Chapter 5. Compiler Runtime Environment
This chapter discusses the MPLAB C32 C compiler runtime environment.
Items discussed in this chapter are:
• Register Conventions
• Stack Usage
• Heap Usage
• Function Calling Convention
• Startup and Initialization
• Contents of the Default Linker Script
• RAM Functions
TABLE 5-1:
$0
$1
$2-$3
$4-$7
$8-$15
$16-$23
$24-$25
$26-$27
$28
$29
$30
$31
Register Name
REGISTER CONVENTIONS
zero
at
v0-v1
a0-a3
t0-t7
s0-s7
t8-t9
k0-k1
gp
sp
fp or s8
ra
Software Name
MPLAB
Always 0 when read.
Assembler temporary variable.
Return value from functions.
Used for passing arguments to functions.
Temporary registers used by compiler for expression
evaluation. Values not saved across function calls.
Temporary registers whose values are saved across
function calls.
Temporary registers used by compiler for expression
evaluation. Values not saved across function calls.
Reserved for interrupt/trap handler.
Global pointer.
Stack Pointer.
Frame Pointer if needed. Additional temporary saved
register if not.
Return address for functions.
®
C32 C COMPILER
USER’S GUIDE
Use
DS51686A-page 57