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MIPSpro N32 ABI Handbook
(document number: 007-2816-005 / published: 2002-11-19) table of contents | additional info | download
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Index

32-bit ABI

Limitations of the 32-bit ABI

32-bit mode

limitations

Limitations of the 32-bit ABI

64-bit ABI

Limitations of the 64-bit ABI

64-bit mode

limitations

Limitations of the 64-bit ABI

ABI

attribute summary

ABI Attribute Summary

definition

Purpose of the n32 ABI

addressing scheme

n32 and Native 64-Bit (n64) Subprogram Interface for MIPS Architectures

argument registers

n32 and Native 64-Bit (n64) Subprogram Interface for MIPS Architectures

arguments

passing

Argument Passing

assembly language programs

N32 Migration Requirements
Assembly Language Programming Guidelines

global pointer

Caller $gp (o32) vs. Callee Saved $gp (n32 and n64)

issues

Assembly Language Issues

leaf routine

An Example Application

porting

Source Code Changes
Assembly Language Issues

predefined variables

Predefined Variables

attribute summary

ABI Attribute Summary

build

multiple versions

Building Multiple Versions of the Application

n32 application

Building and Running the N32 Application

o32 program

Building and Running the o32 Application

build procedure

Build Procedure

C functions

floating point

Source Code Changes

calling convention

Calling Convention Implementations

char

Implementation Differences

code

PIC

n32 and Native 64-Bit (n64) Subprogram Interface for MIPS Architectures

compiling

for n32 and o32

Putting It Together

n32 program

Building and Running the N32 Application

o32 program

Building and Running the o32 Application

composite types

n32 and Native 64-Bit (n64) Subprogram Interface for MIPS Architectures

.cpload

gp Register

.cpload register

Caller $gp (o32) vs. Callee Saved $gp (n32 and n64)

.cprestore

gp Register

.cprestore register

Caller $gp (o32) vs. Callee Saved $gp (n32 and n64)

.cpsetup register

Caller $gp (o32) vs. Callee Saved $gp (n32 and n64)

data types

Implementation Differences

char

Implementation Differences

double

Implementation Differences

float

Implementation Differences

int

Implementation Differences

pointer

Implementation Differences

short int

Implementation Differences

differences

hardware

Run-time Issues

double

Implementation Differences

doublewords

n32 and Native 64-Bit (n64) Subprogram Interface for MIPS Architectures

executing

n32 program

Building and Running the N32 Application

float

Implementation Differences

floating points

n32 and Native 64-Bit (n64) Subprogram Interface for MIPS Architectures

arguments

n32 and Native 64-Bit (n64) Subprogram Interface for MIPS Architectures

C functions

Source Code Changes

quad-precision

n32 and Native 64-Bit (n64) Subprogram Interface for MIPS Architectures

registers

n32 and Native 64-Bit (n64) Subprogram Interface for MIPS Architectures
Using More Floating Point Registers

FPU

Using More Floating Point Registers

FR bit

Using More Floating Point Registers

function

C

Source Code Changes

get_regs()

Argument Passing

regs.s

An Example Application

get_regs() function

Argument Passing

GOT

Caller $gp (o32) vs. Callee Saved $gp (n32 and n64)

$gp register

Caller $gp (o32) vs. Callee Saved $gp (n32 and n64)
An Example Application
gp Register

implementation differences

Implementation Differences

include files

Build Procedure

int

Implementation Differences

integer parameters

n32 and Native 64-Bit (n64) Subprogram Interface for MIPS Architectures

integer registers

n32 and Native 64-Bit (n64) Subprogram Interface for MIPS Architectures

internal subprogram interface

n32 and Native 64-Bit (n64) Subprogram Interface for MIPS Architectures

ints

sign-extended

n32 and Native 64-Bit (n64) Subprogram Interface for MIPS Architectures

leaf routine

An Example Application

libraries

N32 Migration Requirements
Compatibility

porting

Porting Environment

linking

Using a Different Subroutine Linkage

macros

sys/asm.h

gp Register

main() function

An Example Application

makefiles

porting

Porting Environment

memory

n32 and Native 64-Bit (n64) Subprogram Interface for MIPS Architectures

migrating to n32

N32 Migration Requirements

multiple versions

Building Multiple Versions of the Application

n32

addresses

n32 and Native 64-Bit (n64) Subprogram Interface for MIPS Architectures

and assembly language

N32 Migration Requirements

argument passing

Argument Passing

argument registers

What is N32?

build procedure

Build Procedure

calling convention

What is N32?
Calling Convention Implementations

compiling varargs

Varargs Routines

data types

Implementation Differences

debug format

What is N32?

doublewords

n32 and Native 64-Bit (n64) Subprogram Interface for MIPS Architectures

examples

N32 Examples and Case Studies

floating point registers

What is N32?

floating points

parameters

n32 and Native 64-Bit (n64) Subprogram Interface for MIPS Architectures

FR bit

Using More Floating Point Registers

implementation differences

Implementation Differences

integer model

What is N32?

integer parameters

n32 and Native 64-Bit (n64) Subprogram Interface for MIPS Architectures

ISA

What is N32?

libraries

N32 Migration Requirements
Compatibility

migration

N32 Migration Requirements

native calling sequence

n32 and Native 64-Bit (n64) Subprogram Interface for MIPS Architectures

native subprogram interface

n32 and Native 64-Bit (n64) Subprogram Interface for MIPS Architectures

optimizer

Run-time Issues

parameter passing

n32 and Native 64-Bit (n64) Subprogram Interface for MIPS Architectures

pointers

n32 and Native 64-Bit (n64) Subprogram Interface for MIPS Architectures

porting

N32 Porting Guidelines

recompile programs

N32 Migration Requirements

register conventions

n32 and Native 64-Bit (n64) Subprogram Interface for MIPS Architectures

register sizes

Different Register Sizes
Register Size

requirements

N32 Migration Requirements

runtime issues

Run-time Issues

source code

Source Code Changes

stack parameter

n32 and Native 64-Bit (n64) Subprogram Interface for MIPS Architectures

subroutine linkage

Using a Different Subroutine Linkage

n64

data types

Implementation Differences

implementation differences

Implementation Differences

libraries

Compatibility

native calling sequence

n32 and Native 64-Bit (n64) Subprogram Interface for MIPS Architectures

native subprogram interface

n32 and Native 64-Bit (n64) Subprogram Interface for MIPS Architectures

NARGSAVE

Using a Different Subroutine Linkage

native calling sequence

n32 and Native 64-Bit (n64) Subprogram Interface for MIPS Architectures

native subprogram interface

n32 and Native 64-Bit (n64) Subprogram Interface for MIPS Architectures

o32

build

Building and Running the o32 Application

FR bit

Using More Floating Point Registers

libraries

Compatibility

optimizer

Run-time Issues

parameter passing

n32 and Native 64-Bit (n64) Subprogram Interface for MIPS Architectures

passing arguments

Argument Passing

PIC

n32 and Native 64-Bit (n64) Subprogram Interface for MIPS Architectures

pointers

n32 and Native 64-Bit (n64) Subprogram Interface for MIPS Architectures
Implementation Differences

porting

assembly language code

Source Code Changes
Assembly Language Programming Guidelines
Assembly Language Issues

example

An Example Application

for n32 and o32

Putting It Together

libraries

Porting Environment

macros

gp Register

makefiles

Porting Environment

porting environment

Porting Environment

porting guidelines

N32 Porting Guidelines

porting to n32

N32 Migration Requirements

position-independent code

n32 and Native 64-Bit (n64) Subprogram Interface for MIPS Architectures

predefined variables

Predefined Variables

prototypes

n32 and Native 64-Bit (n64) Subprogram Interface for MIPS Architectures

quad-precision floating point

n32 and Native 64-Bit (n64) Subprogram Interface for MIPS Architectures

registers

argument

n32 and Native 64-Bit (n64) Subprogram Interface for MIPS Architectures

conventions

n32 and Native 64-Bit (n64) Subprogram Interface for MIPS Architectures

.cpload

Caller $gp (o32) vs. Callee Saved $gp (n32 and n64)

.cprestore

Caller $gp (o32) vs. Callee Saved $gp (n32 and n64)

.cpsetup

Caller $gp (o32) vs. Callee Saved $gp (n32 and n64)

floating point

n32 and Native 64-Bit (n64) Subprogram Interface for MIPS Architectures
n32 and Native 64-Bit (n64) Subprogram Interface for MIPS Architectures
Using More Floating Point Registers

$gp

Caller $gp (o32) vs. Callee Saved $gp (n32 and n64)
An Example Application
gp Register

integer

n32 and Native 64-Bit (n64) Subprogram Interface for MIPS Architectures

reserving memory

n32 and Native 64-Bit (n64) Subprogram Interface for MIPS Architectures

size

Different Register Sizes
Register Size

reg.s function

An Example Application

routines

n32 and Native 64-Bit (n64) Subprogram Interface for MIPS Architectures

leaf

An Example Application

varargs

Varargs Routines

run

o32 program

Building and Running the o32 Application

runtime issues

Run-time Issues

scalar parameters

n32 and Native 64-Bit (n64) Subprogram Interface for MIPS Architectures

short int

Implementation Differences

source code

changes

Source Code Changes

stack parameter slots

n32 and Native 64-Bit (n64) Subprogram Interface for MIPS Architectures

stack pointer

n32 and Native 64-Bit (n64) Subprogram Interface for MIPS Architectures

stack regions

n32 and Native 64-Bit (n64) Subprogram Interface for MIPS Architectures

structs

n32 and Native 64-Bit (n64) Subprogram Interface for MIPS Architectures

subroutine linkage

Using a Different Subroutine Linkage

sys/asm.h file

gp Register

types

composite

n32 and Native 64-Bit (n64) Subprogram Interface for MIPS Architectures

data

Implementation Differences

structs

n32 and Native 64-Bit (n64) Subprogram Interface for MIPS Architectures

unions

n32 and Native 64-Bit (n64) Subprogram Interface for MIPS Architectures

unions

n32 and Native 64-Bit (n64) Subprogram Interface for MIPS Architectures

varargs

n32 and Native 64-Bit (n64) Subprogram Interface for MIPS Architectures

function

An Example Application

routine

Varargs Routines

variable argument routines

n32 and Native 64-Bit (n64) Subprogram Interface for MIPS Architectures

variables

predefined

Predefined Variables

versions

multiple

Building Multiple Versions of the Application

Prev	Table of Contents
Chapter 4. N32 Examples and Case Studies

MIPSpro N32 ABI Handbook
(document number: 007-2816-005 / published: 2002-11-19)    table of contents  |  additional info  |  download

    Front Matter
    About This Guide
    Chapter 1. N32 ABI Overview
    Chapter 2. Calling Convention Implementations
    Chapter 3. Compatibility, Porting, and Assembly Language Programming Issues
    Chapter 4. N32 Examples and Case Studies
    Index

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