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(as) Invoking
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Here is a brief summary of how to invoke `as'. For details, see
Command-Line Options Invoking.
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]
[-replace | -noreplace]
[-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]
_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 MICROBLAZE options:_
_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]
[-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:_
[-mpwrx|-mpwr2|-mpwr|-m601|-mppc|-mppc32|-m603|-m604|
-m403|-m405|-mppc64|-m620|-mppc64bridge|-mbooke]
[-mcom|-many|-maltivec|-mvsx] [-memb]
[-mregnames|-mno-regnames]
[-mrelocatable|-mrelocatable-lib]
[-mlittle|-mlittle-endian|-mbig|-mbig-endian]
[-msolaris|-mno-solaris]
_Target RX options:_
[-mlittle-endian|-mbig-endian]
[-m32bit-ints|-m16bit-ints]
[-m32bit-doubles|-m64bit-doubles]
_Target s390 options:_
[-m31|-m64] [-mesa|-mzarch] [-march=CPU]
[-mregnames|-mno-regnames]
[-mwarn-areg-zero]
_Target SCORE options:_
[-EB][-EL][-FIXDD][-NWARN]
[-SCORE5][-SCORE5U][-SCORE7][-SCORE3]
[-march=score7][-march=score3]
[-USE_R1][-KPIC][-O0][-G NUM][-V]
_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 <FILENAME>|-me <FILENAME>]
_Target Z80 options:_
[-z80] [-r800]
[ -ignore-undocumented-instructions] [-Wnud]
[ -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]
`@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
`-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. `.altmacro' Altmacro.
`-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 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. Symbol
Names.
`--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.
`-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.
`-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.
`-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.
`--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 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.
`--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.
`-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'
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'
`--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.
`-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 the
s390 processor family.
`-m31'
`-m64'
Select the word size, either 31/32 bits or 64 bits.
`-mesa'
`-mzarch'
Select the architecture mode, either the Enterprise System
Architecture (esa) or the z/Architecture mode (zarch).
`-march=PROCESSOR'
Specify which s390 processor variant is the target, `g6', `g6',
`z900', `z990', `z9-109', `z9-ec', or `z10'.
`-mregnames'
`-mno-regnames'
Allow or disallow symbolic names for registers.
`-mwarn-areg-zero'
Warn whenever the operand for a base or index register has been
specified but evaluates to zero.
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'
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.
`-forbid-unportable-instructions'
`-Fup'
Treat undocumented Z80 instructions that do not work on R800 as
errors.
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* Manual Structure of this Manual
* GNU Assembler The GNU Assembler
* Object Formats Object File Formats
* Command Line Command Line
* Input Files Input Files
* Object Output (Object) File
* Errors Error and Warning Messages
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