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<h3 class="section">9.15 80386 Dependent Features</h3>
<p><a name="index-i386-support-980"></a><a name="index-i80386-support-981"></a><a name="index-x86_002d64-support-982"></a>
The i386 version <code>as</code> supports both the original Intel 386
architecture in both 16 and 32-bit mode as well as AMD x86-64 architecture
extending the Intel architecture to 64-bits.
<ul class="menu">
<li><a accesskey="1" href="i386_002dOptions.html#i386_002dOptions">i386-Options</a>: Options
<li><a accesskey="2" href="i386_002dDirectives.html#i386_002dDirectives">i386-Directives</a>: X86 specific directives
<li><a accesskey="3" href="i386_002dSyntax.html#i386_002dSyntax">i386-Syntax</a>: Syntactical considerations
<li><a accesskey="4" href="i386_002dMnemonics.html#i386_002dMnemonics">i386-Mnemonics</a>: Instruction Naming
<li><a accesskey="5" href="i386_002dRegs.html#i386_002dRegs">i386-Regs</a>: Register Naming
<li><a accesskey="6" href="i386_002dPrefixes.html#i386_002dPrefixes">i386-Prefixes</a>: Instruction Prefixes
<li><a accesskey="7" href="i386_002dMemory.html#i386_002dMemory">i386-Memory</a>: Memory References
<li><a accesskey="8" href="i386_002dJumps.html#i386_002dJumps">i386-Jumps</a>: Handling of Jump Instructions
<li><a accesskey="9" href="i386_002dFloat.html#i386_002dFloat">i386-Float</a>: Floating Point
<li><a href="i386_002dSIMD.html#i386_002dSIMD">i386-SIMD</a>: Intel's MMX and AMD's 3DNow! SIMD Operations
<li><a href="i386_002dLWP.html#i386_002dLWP">i386-LWP</a>: AMD's Lightweight Profiling Instructions
<li><a href="i386_002dBMI.html#i386_002dBMI">i386-BMI</a>: Bit Manipulation Instruction
<li><a href="i386_002dTBM.html#i386_002dTBM">i386-TBM</a>: AMD's Trailing Bit Manipulation Instructions
<li><a href="i386_002d16bit.html#i386_002d16bit">i386-16bit</a>: Writing 16-bit Code
<li><a href="i386_002dArch.html#i386_002dArch">i386-Arch</a>: Specifying an x86 CPU architecture
<li><a href="i386_002dBugs.html#i386_002dBugs">i386-Bugs</a>: AT&T Syntax bugs
<li><a href="i386_002dNotes.html#i386_002dNotes">i386-Notes</a>: Notes
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