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<title>Using as: V850 Options</title>
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<a name="V850-Options"></a>
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<div class="header">
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<p>
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Next: <a href="V850-Syntax.html#V850-Syntax" accesskey="n" rel="next">V850 Syntax</a>, Up: <a href="V850_002dDependent.html#V850_002dDependent" accesskey="u" rel="up">V850-Dependent</a> [<a href="index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="AS-Index.html#AS-Index" title="Index" rel="index">Index</a>]</p>
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<hr>
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<a name="Options-28"></a>
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<h4 class="subsection">9.49.1 Options</h4>
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<a name="index-V850-options-_0028none_0029"></a>
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<a name="index-options-for-V850-_0028none_0029"></a>
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<p><code>as</code> supports the following additional command-line options
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for the V850 processor family:
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</p>
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<a name="index-command_002dline-options_002c-V850"></a>
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<a name="index-V850-command_002dline-options"></a>
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<dl compact="compact">
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<dd>
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<a name="index-_002dwsigned_005foverflow-command_002dline-option_002c-V850"></a>
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</dd>
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<dt><code>-wsigned_overflow</code></dt>
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<dd><p>Causes warnings to be produced when signed immediate values overflow the
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space available for then within their opcodes. By default this option
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is disabled as it is possible to receive spurious warnings due to using
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exact bit patterns as immediate constants.
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</p>
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<a name="index-_002dwunsigned_005foverflow-command_002dline-option_002c-V850"></a>
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</dd>
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<dt><code>-wunsigned_overflow</code></dt>
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<dd><p>Causes warnings to be produced when unsigned immediate values overflow
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the space available for then within their opcodes. By default this
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option is disabled as it is possible to receive spurious warnings due to
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using exact bit patterns as immediate constants.
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</p>
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<a name="index-_002dmv850-command_002dline-option_002c-V850"></a>
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</dd>
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<dt><code>-mv850</code></dt>
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<dd><p>Specifies that the assembled code should be marked as being targeted at
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the V850 processor. This allows the linker to detect attempts to link
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such code with code assembled for other processors.
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</p>
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<a name="index-_002dmv850e-command_002dline-option_002c-V850"></a>
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</dd>
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<dt><code>-mv850e</code></dt>
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<dd><p>Specifies that the assembled code should be marked as being targeted at
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the V850E processor. This allows the linker to detect attempts to link
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such code with code assembled for other processors.
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</p>
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<a name="index-_002dmv850e1-command_002dline-option_002c-V850"></a>
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</dd>
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<dt><code>-mv850e1</code></dt>
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<dd><p>Specifies that the assembled code should be marked as being targeted at
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the V850E1 processor. This allows the linker to detect attempts to link
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such code with code assembled for other processors.
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</p>
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<a name="index-_002dmv850any-command_002dline-option_002c-V850"></a>
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</dd>
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<dt><code>-mv850any</code></dt>
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<dd><p>Specifies that the assembled code should be marked as being targeted at
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the V850 processor but support instructions that are specific to the
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extended variants of the process. This allows the production of
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binaries that contain target specific code, but which are also intended
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to be used in a generic fashion. For example libgcc.a contains generic
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routines used by the code produced by GCC for all versions of the v850
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architecture, together with support routines only used by the V850E
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architecture.
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</p>
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<a name="index-_002dmv850e2-command_002dline-option_002c-V850"></a>
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</dd>
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<dt><code>-mv850e2</code></dt>
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<dd><p>Specifies that the assembled code should be marked as being targeted at
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the V850E2 processor. This allows the linker to detect attempts to link
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such code with code assembled for other processors.
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</p>
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<a name="index-_002dmv850e2v3-command_002dline-option_002c-V850"></a>
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</dd>
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<dt><code>-mv850e2v3</code></dt>
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<dd><p>Specifies that the assembled code should be marked as being targeted at
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the V850E2V3 processor. This allows the linker to detect attempts to link
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such code with code assembled for other processors.
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</p>
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<a name="index-_002dmv850e2v4-command_002dline-option_002c-V850"></a>
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</dd>
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<dt><code>-mv850e2v4</code></dt>
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<dd><p>This is an alias for <samp>-mv850e3v5</samp>.
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</p>
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<a name="index-_002dmv850e3v5-command_002dline-option_002c-V850"></a>
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</dd>
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<dt><code>-mv850e3v5</code></dt>
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<dd><p>Specifies that the assembled code should be marked as being targeted at
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the V850E3V5 processor. This allows the linker to detect attempts to link
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such code with code assembled for other processors.
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</p>
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<a name="index-_002dmrelax-command_002dline-option_002c-V850"></a>
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</dd>
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<dt><code>-mrelax</code></dt>
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<dd><p>Enables relaxation. This allows the .longcall and .longjump pseudo
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ops to be used in the assembler source code. These ops label sections
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of code which are either a long function call or a long branch. The
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assembler will then flag these sections of code and the linker will
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attempt to relax them.
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</p>
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<a name="index-_002dmgcc_002dabi-command_002dline-option_002c-V850"></a>
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</dd>
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<dt><code>-mgcc-abi</code></dt>
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<dd><p>Marks the generated object file as supporting the old GCC ABI.
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</p>
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<a name="index-_002dmrh850_002dabi-command_002dline-option_002c-V850"></a>
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</dd>
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<dt><code>-mrh850-abi</code></dt>
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<dd><p>Marks the generated object file as supporting the RH850 ABI. This is
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the default.
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</p>
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<a name="index-_002dm8byte_002dalign-command_002dline-option_002c-V850"></a>
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</dd>
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<dt><code>-m8byte-align</code></dt>
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<dd><p>Marks the generated object file as supporting a maximum 64-bits of
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alignment for variables defined in the source code.
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</p>
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<a name="index-_002dm4byte_002dalign-command_002dline-option_002c-V850"></a>
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</dd>
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<dt><code>-m4byte-align</code></dt>
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<dd><p>Marks the generated object file as supporting a maximum 32-bits of
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alignment for variables defined in the source code. This is the
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default.
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</p>
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<a name="index-_002dmsoft_002dfloat-command_002dline-option_002c-V850"></a>
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</dd>
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<dt><code>-msoft-float</code></dt>
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<dd><p>Marks the generated object file as not using any floating point
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instructions - and hence can be linked with other V850 binaries
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that do or do not use floating point. This is the default for
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binaries for architectures earlier than the <code>e2v3</code>.
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</p>
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<a name="index-_002dmhard_002dfloat-command_002dline-option_002c-V850"></a>
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</dd>
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<dt><code>-mhard-float</code></dt>
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<dd><p>Marks the generated object file as one that uses floating point
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instructions - and hence can only be linked with other V850 binaries
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that use the same kind of floating point instructions, or with
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binaries that do not use floating point at all. This is the default
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for binaries the <code>e2v3</code> and later architectures.
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</p>
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</dd>
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</dl>
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<hr>
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<div class="header">
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<p>
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Next: <a href="V850-Syntax.html#V850-Syntax" accesskey="n" rel="next">V850 Syntax</a>, Up: <a href="V850_002dDependent.html#V850_002dDependent" accesskey="u" rel="up">V850-Dependent</a> [<a href="index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="AS-Index.html#AS-Index" title="Index" rel="index">Index</a>]</p>
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