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http://en.wikipedia.org/wiki/I386
http://en.wikipedia.org/wiki/I486
http://en.wikipedia.org/wiki/I586

man gcc

-mtune=cpu-type
           Tune to cpu-type everything applicable about the generated code,
           except for the ABI and the set of available instructions.  The
           choices for cpu-type are:

           i386
               Original Intel's i386 CPU.

           i486
               Intel's i486 CPU.  (No scheduling is implemented for this
               chip.)

           i586, pentium
               Intel Pentium CPU with no MMX support.

           pentium-mmx
               Intel PentiumMMX CPU based on Pentium core with MMX instruction
               set support.

           i686, pentiumpro
               Intel PentiumPro CPU.

           pentium2
               Intel Pentium2 CPU based on PentiumPro core with MMX instruc-
               tion set support.

           pentium3, pentium3m
               Intel Pentium3 CPU based on PentiumPro core with MMX and SSE
               instruction set support.

           pentium-m
               Low power version of Intel Pentium3 CPU with MMX, SSE and SSE2
               instruction set support.  Used by Centrino notebooks.

           pentium4, pentium4m
               Intel Pentium4 CPU with MMX, SSE and SSE2 instruction set sup-
               port.

           prescott
               Improved version of Intel Pentium4 CPU with MMX, SSE, SSE2 and
               SSE3 instruction set support.

           nocona
               Improved version of Intel Pentium4 CPU with 64-bit extensions,
               MMX, SSE, SSE2 and SSE3 instruction set support.

           k6  AMD K6 CPU with MMX instruction set support.

           k6-2, k6-3
               Improved versions of AMD K6 CPU with MMX and 3dNOW! instruction
               set support.

           athlon, athlon-tbird
               AMD Athlon CPU with MMX, 3dNOW!, enhanced 3dNOW! and SSE
               prefetch instructions support.

           athlon-4, athlon-xp, athlon-mp
               Improved AMD Athlon CPU with MMX, 3dNOW!, enhanced 3dNOW! and
               full SSE instruction set support.

           k8, opteron, athlon64, athlon-fx
               AMD K8 core based CPUs with x86-64 instruction set support.
               (This supersets MMX, SSE, SSE2, 3dNOW!, enhanced 3dNOW! and
               64-bit instruction set extensions.)

           winchip-c6
               IDT Winchip C6 CPU, dealt in same way as i486 with additional
               MMX instruction set support.

           winchip2
               IDT Winchip2 CPU, dealt in same way as i486 with additional MMX
               and 3dNOW!  instruction set support.

           c3  Via C3 CPU with MMX and 3dNOW!  instruction set support.  (No
               scheduling is implemented for this chip.)

           c3-2
               Via C3-2 CPU with MMX and SSE instruction set support.  (No
               scheduling is implemented for this chip.)

           While picking a specific cpu-type will schedule things appropri-
           ately for that particular chip, the compiler will not generate any
           code that does not run on the i386 without the -march=cpu-type
           option being used.

Это сообщение отредактировал(а) giner - 24.5.2007, 14:48