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Beginner
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IA32 ISA

Opcode,ISA Encode,Decode
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Beginner
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Quoting - miro5566
Opcode,ISA Encode,Decode

Hello, I create this thread And I miss the Q :)
Where Can I find detailed information about encoding instructions I mean I want to make a simple assembler>
the information in cpu manuals hard to understand and there is no examples to show you how is the actual work done.

Please anyone have have any idea are welcome.

thanks
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Black Belt
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You could take ideas from gnu as, if you're willing to comply with the license.
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New Contributor I
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I found sandpile.orginvaluable for writing my assembler; SoftWire. The source is available under LGPL so you should be able to use it for your own project.

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Quoting - c0d1f1ed

I found sandpile.orginvaluable for writing my assembler; SoftWire. The source is available under LGPL so you should be able to use it for your own project.


I know you already said that you dont want to read CPU manual. But there is an appendix B in
"Intel 64 and IA-32 Architectures Software Developer's Manual
Volume 2B: Instruction Set Reference, N-Z" http://www.intel.com/products/processor/manuals/
that details encoding for all the instrunctions in one place. May be helpful.
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Employee
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There is very nice multi platform open source assembler available YASM http://www.tortall.net/projects/yasm/
it supports nasm and GNU syntax, supports AVX ... it handles all instructions' definitions gracefully in one single python script file gen_x86_insn.py - suggest you to take a look.
-Max

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