Using as: i386-Dependent

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9.15 80386 Dependent Features

The i386 version as 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.

• i386-Options:    Options
• i386-Directives:    X86 specific directives
• i386-Syntax:    Syntactical considerations
• i386-Mnemonics:    Instruction Naming
• i386-Regs:    Register Naming
• i386-Prefixes:    Instruction Prefixes
• i386-Memory:    Memory References
• i386-Jumps:    Handling of Jump Instructions
• i386-Float:    Floating Point
• i386-SIMD:    Intel’s MMX and AMD’s 3DNow! SIMD Operations
• i386-LWP:    AMD’s Lightweight Profiling Instructions
• i386-BMI:    Bit Manipulation Instruction
• i386-TBM:    AMD’s Trailing Bit Manipulation Instructions
• i386-16bit:    Writing 16-bit Code
• i386-Arch:    Specifying an x86 CPU architecture
• i386-Bugs:    AT&T Syntax bugs
• i386-Notes:    Notes