Subversion Repositories openrisc_2011-10-31

@c Copyright 2001, 2002, 2003, 2005, 2006, 2007, 2008

@c Free Software Foundation, Inc.

@c This is part of the GAS manual.

@c For copying conditions, see the file as.texinfo.

@ifset GENERIC

@page

@node PPC-Dependent

@chapter PowerPC Dependent Features

@end ifset

@ifclear GENERIC

@node Machine Dependencies

@chapter PowerPC Dependent Features

@end ifclear

@cindex PowerPC support

@menu

* PowerPC-Opts::                Options

* PowerPC-Pseudo::              PowerPC Assembler Directives

@end menu

@node PowerPC-Opts

@section Options

@cindex options for PowerPC

@cindex PowerPC options

@cindex architectures, PowerPC

@cindex PowerPC architectures

The PowerPC chip family includes several successive levels, using the same

core instruction set, but including a few additional instructions at

each level.  There are exceptions to this however.  For details on what

instructions each variant supports, please see the chip's architecture

reference manual.

The following table lists all available PowerPC options.

@table @code

@item -mpwrx | -mpwr2

Generate code for POWER/2 (RIOS2).

@item -mpwr

Generate code for POWER (RIOS1)

@item -m601

Generate code for PowerPC 601.

@item -mppc, -mppc32, -m603, -m604

Generate code for PowerPC 603/604.

@item -m403, -m405

Generate code for PowerPC 403/405.

@item -m440

Generate code for PowerPC 440.  BookE and some 405 instructions.

@item -m476

Generate code for PowerPC 476.

@item -m7400, -m7410, -m7450, -m7455

Generate code for PowerPC 7400/7410/7450/7455.

@item -m750cl

Generate code for PowerPC 750CL.

@item -mppc64, -m620

Generate code for PowerPC 620/625/630.

@item -me500, -me500x2

Generate code for Motorola e500 core complex.

@item -mspe

Generate code for Motorola SPE instructions.

@item -mppc64bridge

Generate code for PowerPC 64, including bridge insns.

@item -mbooke

Generate code for 32-bit BookE.

@item -ma2

Generate code for A2 architecture.

@item -me300

Generate code for PowerPC e300 family.

@item -maltivec

Generate code for processors with AltiVec instructions.

@item -mvsx

Generate code for processors with Vector-Scalar (VSX) instructions.

@item -mpower4

Generate code for Power4 architecture.

@item -mpower5

Generate code for Power5 architecture.

@item -mpower6

Generate code for Power6 architecture.

@item -mpower7

Generate code for Power7 architecture.

@item -mcell

Generate code for Cell Broadband Engine architecture.

@item -mcom

Generate code Power/PowerPC common instructions.

@item -many

Generate code for any architecture (PWR/PWRX/PPC).

@item -mregnames

Allow symbolic names for registers.

@item -mno-regnames

Do not allow symbolic names for registers.

@item -mrelocatable

Support for GCC's -mrelocatable option.

@item -mrelocatable-lib

Support for GCC's -mrelocatable-lib option.

@item -memb

Set PPC_EMB bit in ELF flags.

@item -mlittle, -mlittle-endian

Generate code for a little endian machine.

@item -mbig, -mbig-endian

Generate code for a big endian machine.

@item -msolaris

Generate code for Solaris.

@item -mno-solaris

Do not generate code for Solaris.

@end table

@node PowerPC-Pseudo

@section PowerPC Assembler Directives

@cindex directives for PowerPC

@cindex PowerPC directives

A number of assembler directives are available for PowerPC.  The

following table is far from complete.

@table @code

@item .machine "string"

This directive allows you to change the machine for which code is

generated.  @code{"string"} may be any of the -m cpu selection options

(without the -m) enclosed in double quotes, @code{"push"}, or

@code{"pop"}.  @code{.machine "push"} saves the currently selected

cpu, which may be restored with @code{.machine "pop"}.

@end table