(as.info.gz) Overview

Info Catalog (as.info.gz) Top (as.info.gz) Top (as.info.gz) Invoking
 
 1 Overview
 **********
 
 Here is a brief summary of how to invoke 'as'.  For details, see 
 Command-Line Options Invoking.
 
      as [-a[cdghlns][=FILE]] [-alternate] [-D]
       [-compress-debug-sections]  [-nocompress-debug-sections]
       [-debug-prefix-map OLD=NEW]
       [-defsym SYM=VAL] [-f] [-g] [-gstabs]
       [-gstabs+] [-gdwarf-2] [-gdwarf-sections]
       [-help] [-I DIR] [-J]
       [-K] [-L] [-listing-lhs-width=NUM]
       [-listing-lhs-width2=NUM] [-listing-rhs-width=NUM]
       [-listing-cont-lines=NUM] [-keep-locals]
       [-no-pad-sections]
       [-o OBJFILE] [-R]
       [-hash-size=NUM] [-reduce-memory-overheads]
       [-statistics]
       [-v] [-version] [-version]
       [-W] [-warn] [-fatal-warnings] [-w] [-x]
       [-Z] [@FILE]
       [-sectname-subst] [-size-check=[error|warning]]
       [-elf-stt-common=[no|yes]]
       [-target-help] [TARGET-OPTIONS]
       [-|FILES ...]
 
      _Target AArch64 options:_
         [-EB|-EL]
         [-mabi=ABI]
 
      _Target Alpha options:_
         [-mCPU]
         [-mdebug | -no-mdebug]
         [-replace | -noreplace]
         [-relax] [-g] [-GSIZE]
         [-F] [-32addr]
 
      _Target ARC options:_
         [-mcpu=CPU]
         [-mA6|-mARC600|-mARC601|-mA7|-mARC700|-mEM|-mHS]
         [-mcode-density]
         [-mrelax]
         [-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 Blackfin options:_
         [-mcpu=PROCESSOR[-SIREVISION]]
         [-mfdpic]
         [-mno-fdpic]
         [-mnopic]
 
      _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 EPIPHANY options:_
         [-mepiphany|-mepiphany16]
 
      _Target H8/300 options:_
         [-h-tick-hex]
 
      _Target i386 options:_
         [-32|-x32|-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|-mm9s12x|-mm9s12xg]
         [-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 Meta options:_
         [-mcpu=CPU] [-mfpu=CPU] [-mdsp=CPU]
      _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]
         [-mfp64] [-mgp64] [-mfpxx]
         [-modd-spreg] [-mno-odd-spreg]
         [-march=CPU] [-mtune=CPU] [-mips1] [-mips2]
         [-mips3] [-mips4] [-mips5] [-mips32] [-mips32r2]
         [-mips32r3] [-mips32r5] [-mips32r6] [-mips64] [-mips64r2]
         [-mips64r3] [-mips64r5] [-mips64r6]
         [-construct-floats] [-no-construct-floats]
         [-mnan=ENCODING]
         [-trap] [-no-break] [-break] [-no-trap]
         [-mips16] [-no-mips16]
         [-mmicromips] [-mno-micromips]
         [-msmartmips] [-mno-smartmips]
         [-mips3d] [-no-mips3d]
         [-mdmx] [-no-mdmx]
         [-mdsp] [-mno-dsp]
         [-mdspr2] [-mno-dspr2]
         [-mdspr3] [-mno-dspr3]
         [-mmsa] [-mno-msa]
         [-mxpa] [-mno-xpa]
         [-mmt] [-mno-mt]
         [-mmcu] [-mno-mcu]
         [-minsn32] [-mno-insn32]
         [-mfix7000] [-mno-fix7000]
         [-mfix-rm7000] [-mno-fix-rm7000]
         [-mfix-vr4120] [-mno-fix-vr4120]
         [-mfix-vr4130] [-mno-fix-vr4130]
         [-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 Nios II options:_
         [-relax-all] [-relax-section] [-no-relax]
         [-EB] [-EL]
 
      _Target NDS32 options:_
          [-EL] [-EB] [-O] [-Os] [-mcpu=CPU]
          [-misa=ISA] [-mabi=ABI] [-mall-ext]
          [-m[no-]16-bit]  [-m[no-]perf-ext] [-m[no-]perf2-ext]
          [-m[no-]string-ext] [-m[no-]dsp-ext] [-m[no-]mac] [-m[no-]div]
          [-m[no-]audio-isa-ext] [-m[no-]fpu-sp-ext] [-m[no-]fpu-dp-ext]
          [-m[no-]fpu-fma] [-mfpu-freg=FREG] [-mreduced-regs]
          [-mfull-regs] [-m[no-]dx-regs] [-mpic] [-mno-relax]
          [-mb2bb]
 
      _Target PDP11 options:_
         [-mpic|-mno-pic] [-mall] [-mno-extensions]
         [-mEXTENSION|-mno-EXTENSION]
         [-mCPU] [-mMACHINE]
 
      _Target picoJava options:_
         [-mb|-me]
 
      _Target PowerPC options:_
         [-a32|-a64]
         [-mpwrx|-mpwr2|-mpwr|-m601|-mppc|-mppc32|-m603|-m604|-m403|-m405|
          -m440|-m464|-m476|-m7400|-m7410|-m7450|-m7455|-m750cl|-mppc64|
          -m620|-me500|-e500x2|-me500mc|-me500mc64|-me5500|-me6500|-mppc64bridge|
          -mbooke|-mpower4|-mpwr4|-mpower5|-mpwr5|-mpwr5x|-mpower6|-mpwr6|
          -mpower7|-mpwr7|-mpower8|-mpwr8|-mpower9|-mpwr9-ma2|
          -mcell|-mspe|-mtitan|-me300|-mcom]
         [-many] [-maltivec|-mvsx|-mhtm|-mvle]
         [-mregnames|-mno-regnames]
         [-mrelocatable|-mrelocatable-lib|-K PIC] [-memb]
         [-mlittle|-mlittle-endian|-le|-mbig|-mbig-endian|-be]
         [-msolaris|-mno-solaris]
         [-nops=COUNT]
 
      _Target RL78 options:_
         [-mg10]
         [-m32bit-doubles|-m64bit-doubles]
 
      _Target RX options:_
         [-mlittle-endian|-mbig-endian]
         [-m32bit-doubles|-m64bit-doubles]
         [-muse-conventional-section-names]
         [-msmall-data-limit]
         [-mpid]
         [-mrelax]
         [-mint-register=NUMBER]
         [-mgcc-abi|-mrx-abi]
 
      _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 TIC6X options:_
         [-march=ARCH] [-mbig-endian|-mlittle-endian]
         [-mdsbt|-mno-dsbt] [-mpid=no|-mpid=near|-mpid=far]
         [-mpic|-mno-pic]
 
      _Target TILE-Gx options:_
         [-m32|-m64][-EB][-EL]
 
      _Target Visium options:_
         [-mtune=ARCH]
 
      _Target Xtensa options:_
       [-[no-]text-section-literals] [-[no-]auto-litpools]
       [-[no-]absolute-literals]
       [-[no-]target-align] [-[no-]longcalls]
       [-[no-]transform]
       [-rename-section OLDNAME=NEWNAME]
       [-[no-]trampolines]
 
      _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]
 
 
 '@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.
 
 '--compress-debug-sections'
      Compress DWARF debug sections using zlib with SHF_COMPRESSED from
      the ELF ABI. The resulting object file may not be compatible with
      older linkers and object file utilities.  Note if compression would
      make a given section _larger_ then it is not compressed.
 
 '--compress-debug-sections=none'
 '--compress-debug-sections=zlib'
 '--compress-debug-sections=zlib-gnu'
 '--compress-debug-sections=zlib-gabi'
      These options control how DWARF debug sections are compressed.
      '--compress-debug-sections=none' is equivalent to
      '--nocompress-debug-sections'.  '--compress-debug-sections=zlib'
      and '--compress-debug-sections=zlib-gabi' are equivalent to
      '--compress-debug-sections'.  '--compress-debug-sections=zlib-gnu'
      compresses DWARF debug sections using zlib.  The debug sections are
      renamed to begin with '.zdebug'.  Note if compression would make a
      given section _larger_ then it is not compressed nor renamed.
 
 '--nocompress-debug-sections'
      Do not compress DWARF debug sections.  This is usually the default
      for all targets except the x86/x86_64, but a configure time option
      can be used to override this.
 
 '-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.
 
 '--gdwarf-sections'
      Instead of creating a .debug_line section, create a series of
      .debug_line.FOO sections where FOO is the name of the corresponding
      code section.  For example a code section called .TEXT.FUNC will
      have its dwarf line number information placed into a section called
      .DEBUG_LINE.TEXT.FUNC.  If the code section is just called .TEXT
      then debug line section will still be called just .DEBUG_LINE
      without any suffix.
 
 '--size-check=error'
 '--size-check=warning'
      Issue an error or warning for invalid ELF .size directive.
 
 '--elf-stt-common=no'
 '--elf-stt-common=yes'
      These options control whether the ELF assembler should generate
      common symbols with the 'STT_COMMON' type.  The default can be
      controlled by a configure option '--enable-elf-stt-common'.
 
 '--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.
 
 '--no-pad-sections'
      Stop the assembler for padding the ends of output sections to the
      alignment of that section.  The default is to pad the sections, but
      this can waste space which might be needed on targets which have
      tight memory constraints.
 
 '-o OBJFILE'
      Name the object-file output from 'as' OBJFILE.
 
 '-R'
      Fold the data section into the text section.
 
 '--hash-size=NUMBER'
      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.
 
 '--sectname-subst'
      Honor substitution sequences in section names.  *Note '.section
      NAME': Section Name Substitutions.
 
 '--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.
 
     AArch64 Options, for the options available when as is
 configured for the 64-bit mode of the ARM Architecture (AArch64).
 
     Alpha Options, for the options available when as is
 configured for an Alpha processor.
 
    The following options are available when as is configured for an ARC
 processor.
 
 '-mcpu=CPU'
      This option selects the core processor variant.
 '-EB | -EL'
      Select either big-endian (-EB) or little-endian (-EL) output.
 '-mcode-density'
      Enable Code Density extenssion instructions.
 
    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.
 '-mccs'
      Turns on CodeComposer Studio assembly syntax compatibility mode.
 '-k'
      Specify that PIC code has been generated.
 
     Blackfin Options, for the options available when as is
 configured for the Blackfin processor family.
 
    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
 Adapteva EPIPHANY series.
 
     Epiphany Options, for the options available when as is
 configured for an Epiphany processor.
 
     i386-Options, for the options available when as is configured
 for an i386 processor.
 
    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.
 
     Nios II Options, for the options available when as is
 configured for an Altera Nios II processor.
 
    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 | -mm9s12x | -mm9s12xg'
      Specify what processor is the target.  The default is defined by
      the configuration option when building the assembler.
 
 '--xgate-ramoffset'
      Instruct the linker to offset RAM addresses from S12X address space
      into XGATE address space.
 
 '-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'
 '-mips32r3'
 '-mips32r5'
 '-mips32r6'
 '-mips64'
 '-mips64r2'
 '-mips64r3'
 '-mips64r5'
 '-mips64r6'
      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', '-mips32r3', '-mips32r5', '-mips32r6', '-mips64',
      '-mips64r2', '-mips64r3', '-mips64r5', and '-mips64r6' correspond
      to generic MIPS V, MIPS32, MIPS32 Release 2, MIPS32 Release 3,
      MIPS32 Release 5, MIPS32 Release 6, MIPS64, MIPS64 Release 2,
      MIPS64 Release 3, MIPS64 Release 5, and MIPS64 Release 6 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.
 
 '-mfix-rm7000'
 '-mno-fix-rm7000'
      Cause nops to be inserted if a dmult or dmultu instruction is
      followed by a load instruction.
 
 '-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.
 
 '-mgp64'
 '-mfp64'
      The register sizes are normally inferred from the ISA and ABI, but
      these flags force a certain group of registers to be treated as 64
      bits wide at all times.  '-mgp64' controls the size of
      general-purpose registers and '-mfp64' controls the size of
      floating-point registers.
 
 '-mfpxx'
      The register sizes are normally inferred from the ISA and ABI, but
      using this flag in combination with '-mabi=32' enables an ABI
      variant which will operate correctly with floating-point registers
      which are 32 or 64 bits wide.
 
 '-modd-spreg'
 '-mno-odd-spreg'
      Enable use of floating-point operations on odd-numbered
      single-precision registers when supported by the ISA. '-mfpxx'
      implies '-mno-odd-spreg', otherwise the default is '-modd-spreg'.
 
 '-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.
 
 '-mmicromips'
 '-mno-micromips'
      Generate code for the microMIPS processor.  This is equivalent to
      putting '.set micromips' at the start of the assembly file.
      '-mno-micromips' turns off this option.  This is equivalent to
      putting '.set nomicromips' at the start of the assembly file.
 
 '-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.
 
 '-mdspr3'
 '-mno-dspr3'
      Generate code for the DSP Release 3 Application Specific Extension.
      This option implies '-mdsp' and '-mdspr2'.  This tells the
      assembler to accept DSP Release 3 instructions.  '-mno-dspr3' turns
      off this option.
 
 '-mmsa'
 '-mno-msa'
      Generate code for the MIPS SIMD Architecture Extension.  This tells
      the assembler to accept MSA instructions.  '-mno-msa' turns off
      this option.
 
 '-mxpa'
 '-mno-xpa'
      Generate code for the MIPS eXtended Physical Address (XPA)
      Extension.  This tells the assembler to accept XPA instructions.
      '-mno-xpa' 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.
 
 '-mmcu'
 '-mno-mcu'
      Generate code for the MCU Application Specific Extension.  This
      tells the assembler to accept MCU instructions.  '-mno-mcu' turns
      off this option.
 
 '-minsn32'
 '-mno-insn32'
      Only use 32-bit instruction encodings when generating code for the
      microMIPS processor.  This option inhibits the use of any 16-bit
      instructions.  This is equivalent to putting '.set insn32' at the
      start of the assembly file.  '-mno-insn32' turns off this option.
      This is equivalent to putting '.set noinsn32' at the start of the
      assembly file.  By default '-mno-insn32' is selected, allowing all
      instructions to be used.
 
 '--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.
 
 '--relax-branch'
 '--no-relax-branch'
      The '--relax-branch' option enables the relaxation of out-of-range
      branches.  By default '--no-relax-branch' is selected, causing any
      out-of-range branches to produce an error.
 
 '-mnan=ENCODING'
      Select between the IEEE 754-2008 ('-mnan=2008') or the legacy
      ('-mnan=legacy') NaN encoding format.  The latter is the default.
 
 '--emulation=NAME'
      This option was formerly used to switch between ELF and ECOFF
      output on targets like IRIX 5 that supported both.  MIPS ECOFF
      support was removed in GAS 2.24, so the option now serves little
      purpose.  It is retained for backwards compatibility.
 
      The available configuration names are: 'mipself', 'mipslelf' and
      'mipsbelf'.  Choosing 'mipself' now has no effect, since the output
      is always ELF. 'mipslelf' and 'mipsbelf' select little- and
      big-endian output respectively, but '-EL' and '-EB' are now the
      preferred options instead.
 
 '-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.
 
     Meta Options, for the options available when as is configured
 for a Meta processor.
 
    See the info pages for documentation of the MMIX-specific options.
 
     NDS32 Options, for the options available when as is
 configured for a NDS32 processor.
 
     PowerPC-Opts, for the options available when as is configured
 for a PowerPC processor.
 
    See the info pages for documentation of the RX-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', 'z10', 'z196', 'zEC12', or 'z13'
      (or 'arch11'), or 'arch12'.
 '-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.
 
     TIC6X Options, for the options available when as is
 configured for a TMS320C6000 processor.
 
     TILE-Gx Options, for the options available when as is
 configured for a TILE-Gx processor.
 
     Visium Options, for the options available when as is
 configured for a Visium processor.
 
     Xtensa Options, for the options available when as is
 configured for an Xtensa processor.
 
    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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