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GNU Development Tools AS(1)

NAME

AS - the portable GNU assembler.

SYNOPSIS

as [-a[cdghlns][=file]] [--alternate] [-D]

[--debug-prefix-map old=new]

[--defsym sym=val] [-f] [-g] [--gstabs]

[--gstabs+] [--gdwarf-2] [--help] [-I dir] [-J]

[-K] [-L] [--listing-lhs-width=NUM]

[--listing-lhs-width2=NUM] [--listing-rhs-width=NUM]

[--listing-cont-lines=NUM] [--keep-locals] [-o

objfile] [-R] [--reduce-memory-overheads] [--statistics]

[-v] [-version] [--version] [-W] [--warn]

[--fatal-warnings] [-w] [-x] [-Z] [@FILE]

[--target-help] [target-options]

[--|files ...]

Target Alpha options:

[-mcpu]

[-mdebug | -no-mdebug]

[-relax] [-g] [-Gsize]

[-F] [-32addr]

Target ARC options:

[-marc[5|6|7|8]]

[-EB|-EL]

Target ARM options:

[-mcpu=processor[+extension...]]

[-march=architecture[+extension...]]

[-mfpu=floating-point-format]

[-mfloat-abi=abi]

[-meabi=ver]

[-mthumb]

[-EB|-EL]

[-mapcs-32|-mapcs-26|-mapcs-float|

-mapcs-reentrant]

[-mthumb-interwork] [-k]

Target CRIS options:

[--underscore | --no-underscore]

[--pic] [-N]

[--emulation=criself | --emulation=crisaout]

[--march=v0_v10 | --march=v10 | --march=v32 |

--march=common_v10_v32]

Target D10V options:

[-O]

Target D30V options:

[-O|-n|-N]

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GNU Development Tools AS(1) Target H8/300 options:

[-h-tick-hex]

Target i386 options:

[--32|--64] [-n]

[-march=CPU[+EXTENSION...]] [-mtune=CPU]

Target i960 options:

[-ACA|-ACA_A|-ACB|-ACC|-AKA|-AKB|

-AKC|-AMC]

[-b] [-no-relax]

Target IA-64 options:

[-mconstant-gp|-mauto-pic]

[-milp32|-milp64|-mlp64|-mp64]

[-mle|mbe]

[-mtune=itanium1|-mtune=itanium2]

[-munwind-check=warning|-munwind-check=error]

[-mhint.b=ok|-mhint.b=warning|-mhint.b=error]

[-x|-xexplicit] [-xauto] [-xdebug]

Target IP2K options:

[-mip2022|-mip2022ext]

Target M32C options:

[-m32c|-m16c] [-relax] [-h-tick-hex]

Target M32R options:

[--m32rx|--[no-]warn-explicit-parallel-conflicts|

--W[n]p]

Target M680X0 options:

[-l] [-m68000|-m68010|-m68020|...]

Target M68HC11 options:

[-m68hc11|-m68hc12|-m68hcs12]

[-mshort|-mlong]

[-mshort-double|-mlong-double]

[--force-long-branches] [--short-branches]

[--strict-direct-mode] [--print-insn-syntax]

[--print-opcodes] [--generate-example]

Target MCORE options:

[-jsri2bsr] [-sifilter] [-relax]

[-mcpu=[210|340]]

Target MIPS options:

[-nocpp] [-EL] [-EB] [-O[optimization level]]

[-g[debug level]] [-G num] [-KPIC] [-call_shared]

[-non_shared] [-xgot [-mvxworks-pic]

[-mabi=ABI] [-32] [-n32] [-64] [-mfp32] [-mgp32]

[-march=CPU] [-mtune=CPU] [-mips1] [-mips2]

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GNU Development Tools AS(1)

[-mips3] [-mips4] [-mips5] [-mips32] [-mips32r2]

[-mips64] [-mips64r2]

[-construct-floats] [-no-construct-floats]

[-trap] [-no-break] [-break] [-no-trap]

[-mfix7000] [-mno-fix7000]

[-mips16] [-no-mips16]

[-msmartmips] [-mno-smartmips]

[-mips3d] [-no-mips3d]

[-mdmx] [-no-mdmx]

[-mdsp] [-mno-dsp]

[-mdspr2] [-mno-dspr2]

[-mmt] [-mno-mt]

[-mdebug] [-no-mdebug]

[-mpdr] [-mno-pdr]

Target MMIX options:

[--fixed-special-register-names] [--globalize-symbols]

[--gnu-syntax] [--relax] [--no-predefined-symbols]

[--no-expand] [--no-merge-gregs] [-x]

[--linker-allocated-gregs]

Target PDP11 options:

[-mpic|-mno-pic] [-mall] [-mno-extensions]

[-mextension|-mno-extension]

[-mcpu] [-mmachine]

Target picoJava options:

[-mb|-me]

Target PowerPC options:

-m403|-m405|-mppc64|-m620|-mppc64bridge|-mbooke|

-mbooke32|-mbooke64]

[-mcom|-many|-maltivec|-mvsx] [-memb]

[-mregnames|-mno-regnames]

[-mrelocatable|-mrelocatable-lib]

[-mlittle|-mlittle-endian|-mbig|-mbig-endian]

[-msolaris|-mno-solaris]

Target SPARC options:

[-Av6|-Av7|-Av8|-Asparclet|-Asparclite

-Av8plus|-Av8plusa|-Av9|-Av9a]

[-xarch=v8plus|-xarch=v8plusa] [-bump]

[-32|-64]

Target TIC54X options:

[-mcpu=54[123589]|-mcpu=54[56]lp] [-mfar-mode|-mf]

[-merrors-to-file |-me ]

Target Z80 options:

[-z80] [-r800]

[ -ignore-undocumented-instructions] [-Wnud]

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GNU Development Tools AS(1)

[ -ignore-unportable-instructions] [-Wnup]

[ -warn-undocumented-instructions] [-Wud]

[ -warn-unportable-instructions] [-Wup]

[ -forbid-undocumented-instructions] [-Fud]

[ -forbid-unportable-instructions] [-Fup]

Target Xtensa options:

[--[no-]text-section-literals] [--[no-]absolute-literals]

[--[no-]target-align] [--[no-]longcalls]

[--[no-]transform]

[--rename-section oldname=newname]

DESCRIPTION

GNU as is really a family of assemblers. If you use (or

have used) the GNU assembler on one architecture, you should

find a fairly similar environment when you use it on another

architecture. Each version has much in common with the

others, including object file formats, most assembler

directives (often called pseudo-ops) and assembler syntax.

as is primarily intended to assemble the output of the GNU C

compiler "gcc" for use by the linker "ld". Nevertheless,

we've tried to make as assemble correctly everything that

other assemblers for the same machine would assemble. Any

exceptions are documented explicitly. This doesn't mean as

always uses the same syntax as another assembler for the

same architecture; for example, we know of several

incompatible versions of 680x0 assembly language syntax.

Each time you run as it assembles exactly one source

program. The source program is made up of one or more files. (The standard input is also a file.)

You give as a command line that has zero or more input file

names. The input files are read (from left file name to

right). A command line argument (in any position) that has

no special meaning is taken to be an input file name.

If you give as no file names it attempts to read one input

file from the as standard input, which is normally your

terminal. You may have to type ctl-D to tell as there is no

more program to assemble.

Use -- if you need to explicitly name the standard input

file in your command line.

If the source is empty, as produces a small, empty object

file.

as may write warnings and error messages to the standard

error file (usually your terminal). This should not happen

when a compiler runs as automatically. Warnings report an

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GNU Development Tools AS(1)

assumption made so that as could keep assembling a flawed

program; errors report a grave problem that stops the

assembly.

If you are invoking as via the GNU C compiler, you can use

the -Wa option to pass arguments through to the assembler.

The assembler arguments must be separated from each other

(and the -Wa) by commas. For example:

gcc -c -g -O -Wa,-alh,-L file.c

This passes two options to the assembler: -alh (emit a

listing to standard output with high-level and assembly

source) and -L (retain local symbols in the symbol table).

Usually you do not need to use this -Wa mechanism, since

many compiler command-line options are automatically passed

to the assembler by the compiler. (You can call the GNU

compiler driver with the -v option to see precisely what

options it passes to each compilation pass, including the

assembler.)

OPTIONS @file

Read command-line options from file. The options read

are inserted in place of the original @file option. If file does not exist, or cannot be read, then the option will be treated literally, and not removed. Options in file are separated by whitespace. A whitespace character may be included in an option by surrounding the entire option in either single or double

quotes. Any character (including a backslash) may be

included by prefixing the character to be included with

a backslash. The file may itself contain additional

@file options; any such options will be processed recursively.

-a[cdghlmns]

Turn on listings, in any of a variety of ways:

-ac omit false conditionals

-ad omit debugging directives

-ag include general information, like as version and

options passed

-ah include high-level source

-al include assembly

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GNU Development Tools AS(1)

-am include macro expansions

-an omit forms processing

-as include symbols

=file set the name of the listing file

You may combine these options; for example, use -aln for

assembly listing without forms processing. The =file

option, if used, must be the last one. By itself, -a

defaults to -ahls.

--alternate

Begin in alternate macro mode.

-D Ignored. This option is accepted for script

compatibility with calls to other assemblers.

--debug-prefix-map old=new

When assembling files in directory old, record debugging

information describing them as in new instead.

--defsym sym=value

Define the symbol sym to be value before assembling the

input file. value must be an integer constant. As in C, a leading 0x indicates a hexadecimal value, and a leading 0 indicates an octal value. The value of the symbol can be overridden inside a source file via the

use of a ".set" pseudo-op.

-f "fast"---skip whitespace and comment preprocessing

(assume source is compiler output).

-g

--gen-debug

Generate debugging information for each assembler source

line using whichever debug format is preferred by the target. This currently means either STABS, ECOFF or DWARF2.

--gstabs

Generate stabs debugging information for each assembler

line. This may help debugging assembler code, if the

debugger can handle it.

--gstabs+

Generate stabs debugging information for each assembler

line, with GNU extensions that probably only gdb can

handle, and that could make other debuggers crash or

refuse to read your program. This may help debugging

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GNU Development Tools AS(1)

assembler code. Currently the only GNU extension is the

location of the current working directory at assembling

time.

--gdwarf-2

Generate DWARF2 debugging information for each assembler

line. This may help debugging assembler code, if the

debugger can handle it. Note---this option is only

supported by some targets, not all of them.

--help

Print a summary of the command line options and exit.

--target-help

Print a summary of all target specific options and exit.

-I dir

Add directory dir to the search list for ".include" directives.

-J Don't warn about signed overflow.

-K Issue warnings when difference tables altered for long

displacements.

-L

--keep-locals

Keep (in the symbol table) local symbols. These symbols

start with system-specific local label prefixes,

typically .L for ELF systems or L for traditional a.out systems.

--listing-lhs-width=number

Set the maximum width, in words, of the output data

column for an assembler listing to number.

--listing-lhs-width2=number

Set the maximum width, in words, of the output data

column for continuation lines in an assembler listing to

number.

--listing-rhs-width=number

Set the maximum width of an input source line, as

displayed in a listing, to number bytes.

--listing-cont-lines=number

Set the maximum number of lines printed in a listing for a single line of input to number + 1.

-o objfile

Name the object-file output from as objfile.

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GNU Development Tools AS(1)

-R Fold the data section into the text section.

Set the default size of GAS's hash tables to a prime

number close to number. Increasing this value can

reduce the length of time it takes the assembler to

perform its tasks, at the expense of increasing the

assembler's memory requirements. Similarly reducing

this value can reduce the memory requirements at the expense of speed.

--reduce-memory-overheads

This option reduces GAS's memory requirements, at the

expense of making the assembly processes slower.

Currently this switch is a synonym for --hash-size=4051,

but in the future it may have other effects as well.

--statistics

Print the maximum space (in bytes) and total time (in

seconds) used by assembly.

--strip-local-absolute

Remove local absolute symbols from the outgoing symbol table.

-v

-version

Print the as version.

--version

Print the as version and exit.

-W

--no-warn

Suppress warning messages.

--fatal-warnings

Treat warnings as errors.

--warn

Don't suppress warning messages or treat them as errors.

-w Ignored.

-x Ignored.

-Z Generate an object file even after errors.

-- | files ...

Standard input, or source files to assemble.

The following options are available when as is configured

for an ARC processor.

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GNU Development Tools AS(1)

-marc[5|6|7|8]

This option selects the core processor variant.

-EB | -EL

Select either big-endian (-EB) or little-endian (-EL)

output.

The following options are available when as is configured

for the ARM processor family.

-mcpu=processor[+extension...]

Specify which ARM processor variant is the target.

-march=architecture[+extension...]

Specify which ARM architecture variant is used by the target.

-mfpu=floating-point-format

Select which Floating Point architecture is the target.

-mfloat-abi=abi

Select which floating point ABI is in use.

-mthumb

Enable Thumb only instruction decoding.

-mapcs-32 | -mapcs-26 | -mapcs-float | -mapcs-reentrant

Select which procedure calling convention is in use.

-EB | -EL

Select either big-endian (-EB) or little-endian (-EL)

output.

-mthumb-interwork

Specify that the code has been generated with

interworking between Thumb and ARM code in mind.

-k Specify that PIC code has been generated.

See the info pages for documentation of the CRIS-specific

options.

The following options are available when as is configured

for a D10V processor.

-O Optimize output by parallelizing instructions.

The following options are available when as is configured

for a D30V processor.

-O Optimize output by parallelizing instructions.

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GNU Development Tools AS(1)

-n Warn when nops are generated.

-N Warn when a nop after a 32-bit multiply instruction is

generated.

The following options are available when as is configured

for the Intel 80960 processor.

-ACA | -ACA_A | -ACB | -ACC | -AKA | -AKB | -AKC | -AMC

Specify which variant of the 960 architecture is the target.

-b Add code to collect statistics about branches taken.

-no-relax

Do not alter compare-and-branch instructions for long

displacements; error if necessary.

The following options are available when as is configured

for the Ubicom IP2K series.

-mip2022ext

Specifies that the extended IP2022 instructions are allowed.

-mip2022

Restores the default behaviour, which restricts the

permitted instructions to just the basic IP2022 ones.

The following options are available when as is configured

for the Renesas M32C and M16C processors.

-m32c

Assemble M32C instructions.

-m16c

Assemble M16C instructions (the default).

-relax

Enable support for link-time relaxations.

-h-tick-hex

Support H'00 style hex constants in addition to 0x00 style.

The following options are available when as is configured

for the Renesas M32R (formerly Mitsubishi M32R) series.

--m32rx

Specify which processor in the M32R family is the target. The default is normally the M32R, but this option changes it to the M32RX.

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GNU Development Tools AS(1)

--warn-explicit-parallel-conflicts or --Wp

Produce warning messages when questionable parallel constructs are encountered.

--no-warn-explicit-parallel-conflicts or --Wnp

Do not produce warning messages when questionable parallel constructs are encountered.

The following options are available when as is configured

for the Motorola 68000 series.

-l Shorten references to undefined symbols, to one word

instead of two.

-m68000 | -m68008 | -m68010 | -m68020 | -m68030

| -m68040 | -m68060 | -m68302 | -m68331 | -m68332

| -m68333 | -m68340 | -mcpu32 | -m5200

Specify what processor in the 68000 family is the target. The default is normally the 68020, but this can be changed at configuration time.

-m68881 | -m68882 | -mno-68881 | -mno-68882

The target machine does (or does not) have a floating-

point coprocessor. The default is to assume a

coprocessor for 68020, 68030, and cpu32. Although the

basic 68000 is not compatible with the 68881, a

combination of the two can be specified, since it's possible to do emulation of the coprocessor instructions with the main processor.

-m68851 | -mno-68851

The target machine does (or does not) have a memory-

management unit coprocessor. The default is to assume

an MMU for 68020 and up.

For details about the PDP-11 machine dependent features

options, see PDP-11-Options.

-mpic | -mno-pic

Generate position-independent (or position-dependent)

code. The default is -mpic.

-mall

-mall-extensions

Enable all instruction set extensions. This is the default.

-mno-extensions

Disable all instruction set extensions.

-mextension | -mno-extension

Enable (or disable) a particular instruction set

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GNU Development Tools AS(1) extension.

-mcpu

Enable the instruction set extensions supported by a particular CPU, and disable all other extensions.

-mmachine

Enable the instruction set extensions supported by a particular machine model, and disable all other extensions.

The following options are available when as is configured

for a picoJava processor.

-mb Generate "big endian" format output.

-ml Generate "little endian" format output.

The following options are available when as is configured

for the Motorola 68HC11 or 68HC12 series.

-m68hc11 | -m68hc12 | -m68hcs12

Specify what processor is the target. The default is defined by the configuration option when building the

assembler.

-mshort

Specify to use the 16-bit integer ABI.

-mlong

Specify to use the 32-bit integer ABI.

-mshort-double

Specify to use the 32-bit double ABI.

-mlong-double

Specify to use the 64-bit double ABI.

--force-long-branches

Relative branches are turned into absolute ones. This concerns conditional branches, unconditional branches and branches to a sub routine.

-S | --short-branches

Do not turn relative branches into absolute ones when the offset is out of range.

--strict-direct-mode

Do not turn the direct addressing mode into extended addressing mode when the instruction does not support direct addressing mode.

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GNU Development Tools AS(1)

--print-insn-syntax

Print the syntax of instruction in case of error.

--print-opcodes

print the list of instructions with syntax and then exit.

--generate-example

print an example of instruction for each possible instruction and then exit. This option is only useful

for testing as.

The following options are available when as is configured

for the SPARC architecture:

-Av6 | -Av7 | -Av8 | -Asparclet | -Asparclite

-Av8plus | -Av8plusa | -Av9 | -Av9a

Explicitly select a variant of the SPARC architecture.

-Av8plus and -Av8plusa select a 32 bit environment.

-Av9 and -Av9a select a 64 bit environment.

-Av8plusa and -Av9a enable the SPARC V9 instruction set

with UltraSPARC extensions.

-xarch=v8plus | -xarch=v8plusa

For compatibility with the Solaris v9 assembler. These

options are equivalent to -Av8plus and -Av8plusa,

respectively.

-bump

Warn when the assembler switches to another

architecture.

The following options are available when as is configured

for the 'c54x architecture.

-mfar-mode

Enable extended addressing mode. All addresses and

relocations will assume extended addressing (usually 23

bits).

-mcpu=CPU_VERSION

Sets the CPU version being compiled for.

-merrors-to-file FILENAME

Redirect error output to a file, for broken systems which don't support such behaviour in the shell.

The following options are available when as is configured

for a MIPS processor.

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GNU Development Tools AS(1)

-G num

This option sets the largest size of an object that can be referenced implicitly with the "gp" register. It is

only accepted for targets that use ECOFF format, such as

a DECstation running Ultrix. The default value is 8.

-EB Generate "big endian" format output.

-EL Generate "little endian" format output.

-mips1

-mips2

-mips3

-mips4

-mips5

-mips32

-mips32r2

-mips64

-mips64r2

Generate code for a particular MIPS Instruction Set

Architecture level. -mips1 is an alias for

-march=r3000, -mips2 is an alias for -march=r6000,

-mips3 is an alias for -march=r4000 and -mips4 is an

alias for -march=r8000. -mips5, -mips32, -mips32r2,

-mips64, and -mips64r2 correspond to generic MIPS V,

MIPS32, MIPS32 Release 2, MIPS64, and MIPS64 Release 2

ISA processors, respectively.

-march=CPU

Generate code for a particular MIPS cpu.

-mtune=cpu

Schedule and tune for a particular MIPS cpu.

-mfix7000

-mno-fix7000

Cause nops to be inserted if the read of the destination register of an mfhi or mflo instruction occurs in the following two instructions.

-mdebug

-no-mdebug

Cause stabs-style debugging output to go into an ECOFF-

style .mdebug section instead of the standard ELF .stabs sections.

-mpdr

-mno-pdr

Control generation of ".pdr" sections.

-mgp32

-mfp32

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GNU Development Tools AS(1) The register sizes are normally inferred from the ISA and ABI, but these flags force a certain group of

registers to be treated as 32 bits wide at all times.

-mgp32 controls the size of general-purpose registers

and -mfp32 controls the size of floating-point

registers.

-mips16

-no-mips16

Generate code for the MIPS 16 processor. This is equivalent to putting ".set mips16" at the start of the

assembly file. -no-mips16 turns off this option.

-msmartmips

-mno-smartmips

Enables the SmartMIPS extension to the MIPS32 instruction set. This is equivalent to putting ".set

smartmips" at the start of the assembly file.

-mno-smartmips turns off this option.

-mips3d

-no-mips3d

Generate code for the MIPS-3D Application Specific

Extension. This tells the assembler to accept MIPS-3D

instructions. -no-mips3d turns off this option.

-mdmx

-no-mdmx

Generate code for the MDMX Application Specific

Extension. This tells the assembler to accept MDMX

instructions. -no-mdmx turns off this option.

-mdsp

-mno-dsp

Generate code for the DSP Release 1 Application Specific

Extension. This tells the assembler to accept DSP

Release 1 instructions. -mno-dsp turns off this option.

-mdspr2

-mno-dspr2

Generate code for the DSP Release 2 Application Specific

Extension. This option implies -mdsp. This tells the

assembler to accept DSP Release 2 instructions.

-mno-dspr2 turns off this option.

-mmt

-mno-mt

Generate code for the MT Application Specific Extension.

This tells the assembler to accept MT instructions.

-mno-mt turns off this option.

--construct-floats

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GNU Development Tools AS(1)

--no-construct-floats

The --no-construct-floats option disables the

construction of double width floating point constants by loading the two halves of the value into the two single width floating point registers that make up the double

width register. By default --construct-floats is

selected, allowing construction of these floating point constants.

--emulation=name

This option causes as to emulate as configured for some

other target, in all respects, including output format (choosing between ELF and ECOFF only), handling of

pseudo-opcodes which may generate debugging information

or store symbol table information, and default endianness. The available configuration names are: mipsecoff, mipself, mipslecoff, mipsbecoff, mipslelf, mipsbelf. The first two do not alter the default endianness from that of the primary target for which the

assembler was configured; the others change the default

to little- or big-endian as indicated by the b or l in

the name. Using -EB or -EL will override the endianness

selection in any case.

This option is currently supported only when the primary

target as is configured for is a MIPS ELF or ECOFF

target. Furthermore, the primary target or others

specified with --enable-targets=... at configuration

time must include support for the other format, if both are to be available. For example, the Irix 5 configuration includes support for both. Eventually, this option will support more

configurations, with more fine-grained control over the

assembler's behavior, and will be supported for more

processors.

-nocpp

as ignores this option. It is accepted for

compatibility with the native tools.

--trap

--no-trap

--break

--no-break

Control how to deal with multiplication overflow and

division by zero. --trap or --no-break (which are

synonyms) take a trap exception (and only work for Instruction Set Architecture level 2 and higher);

--break or --no-trap (also synonyms, and the default)

take a break exception.

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GNU Development Tools AS(1)

-n When this option is used, as will issue a warning every

time it generates a nop instruction from a macro.

The following options are available when as is configured

for an MCore processor.

-jsri2bsr

-nojsri2bsr

Enable or disable the JSRI to BSR transformation. By default this is enabled. The command line option

-nojsri2bsr can be used to disable it.

-sifilter

-nosifilter

Enable or disable the silicon filter behaviour. By default this is disabled. The default can be overridden

by the -sifilter command line option.

-relax

Alter jump instructions for long displacements.

-mcpu=[210|340]

Select the cpu type on the target hardware. This

controls which instructions can be assembled.

-EB Assemble for a big endian target.

-EL Assemble for a little endian target.

See the info pages for documentation of the MMIX-specific

options.

The following options are available when as is configured

for an Xtensa processor.

--text-section-literals | --no-text-section-literals

With --text-section-literals, literal pools are

interspersed in the text section. The default is

--no-text-section-literals, which places literals in a

separate section in the output file. These options only

affect literals referenced via PC-relative "L32R"

instructions; literals for absolute mode "L32R" instructions are handled separately.

--absolute-literals | --no-absolute-literals

Indicate to the assembler whether "L32R" instructions

use absolute or PC-relative addressing. The default is

to assume absolute addressing if the Xtensa processor

includes the absolute "L32R" addressing option.

Otherwise, only the PC-relative "L32R" mode can be used.

--target-align | --no-target-align

binutils-2.18.92 Last change: 2008-10-02 17

GNU Development Tools AS(1) Enable or disable automatic alignment to reduce branch penalties at the expense of some code density. The

default is --target-align.

--longcalls | --no-longcalls

Enable or disable transformation of call instructions to allow calls across a greater range of addresses. The

default is --no-longcalls.

--transform | --no-transform

Enable or disable all assembler transformations of

Xtensa instructions. The default is --transform;

--no-transform should be used only in the rare cases

when the instructions must be exactly as specified in

the assembly source.

--rename-section oldname=newname

When generating output sections, rename the oldname section to newname.

The following options are available when as is configured

for a Z80 family processor.

-z80

Assemble for Z80 processor.

-r800

Assemble for R800 processor.

-ignore-undocumented-instructions

-Wnud

Assemble undocumented Z80 instructions that also work on R800 without warning.

-ignore-unportable-instructions

-Wnup

Assemble all undocumented Z80 instructions without warning.

-warn-undocumented-instructions

-Wud

Issue a warning for undocumented Z80 instructions that also work on R800.

-warn-unportable-instructions

-Wup

Issue a warning for undocumented Z80 instructions that do not work on R800.

-forbid-undocumented-instructions

-Fud

Treat all undocumented instructions as errors.

binutils-2.18.92 Last change: 2008-10-02 18

GNU Development Tools AS(1)

-forbid-unportable-instructions

-Fup

Treat undocumented Z80 instructions that do not work on

R800 as errors.

ATTRIBUTES

See attributes(5) for descriptions of the following attributes:

______________________________________________

| ATTRIBUTE TYPE | ATTRIBUTE VALUE |

|____________________|_________________________|_

| Availability | developer/gnu-binutils|

|____________________|_________________________|_

| Interface Stability| Uncommitted |

|____________________|________________________|

NOTES Source for GNU binutils is available on http://opensolaris.org.