AssemblyLanguage Tanka

SAKAI Hiroaki(KOZOS Project)TwitterID:kozossakai

AssemblyLanguageTanka?

What's assemblylanguage tanka?

Write program in 5+7+5+7+7 machine codes.

It's cool and exciting!

Example

68 72 6c 64 2168 6f 20 57 6f 90 9068 48 65 6c 6c89 e5 6a 0c 55 6a 0250 90 6a 04 58 cd 80

Write on Japanese

Tanka card.

Result

Hello World!

in otherlanguages,

Tanka is impossible in other programming

languages.

For example,Shell script

#!/bin/sh(9 letters!)

For example,Language C

#include <stdio.h>

(18 letters!)

XSS Tanka?

XSS tanka has no tankism

Assembly is most tankable

language

in SECCONNagano,

What's displayed?

Assemblylanguagetanka's

hangingscroll!

See well.

Title: Niigata

So,

Let's tanking!

Title: Summer vacationTankist: Me

Check points

See assemblypush $0pop %eaxpush %eaxinc %eax

push $0x616d6179push %eaxinc %eax

push $8pop %edxpop %ebxinc %eax

push $0x616b6157push %espinc %eax

pop %ecxint $0x80pop %eaxpop %eaxpop %eaxret

Uppersection Lower

section

See assemblypush $0pop %eaxpush %eaxinc %eax

push $0x616d6179push %eaxinc %eax

push $8pop %edxpop %ebxinc %eax

push $0x616b6157push %espinc %eax

pop %ecxint $0x80pop %eaxpop %eaxpop %eaxret

Uppersection Lower

section

Same instructionin last position.

That is,

Stepped onthe rhyme.

Stepped on the rhyme

by 0x40

Otherpoints

push $0pop %eaxpush %eaxinc %eax

push $0x616d6179push %eaxinc %eax

push $8pop %edxpop %ebxinc %eax

push $0x616b6157push %espinc %eax

pop %ecxint $0x80pop %eaxpop %eaxpop %eaxret

push $0pop %eaxpush %eaxinc %eax

push $0x616d6179push %eaxinc %eax

push $8pop %edxpop %ebxinc %eax

push $0x616b6157push %espinc %eax

pop %ecxint $0x80pop %eaxpop %eaxpop %eaxret

Set up registers by value of EAX.

That is,

Like a flowof a brook.

See instructions

push $0pop %eaxpush %eaxinc %eax

push $0x616d6179push %eaxinc %eax

push $8pop %edxpop %ebxinc %eax

push $0x616b6157push %espinc %eax

pop %ecxint $0x80pop %eaxpop %eaxpop %eaxret

push $0pop %eaxpush %eaxinc %eax

push $0x616d6179push %eaxinc %eax

push $8pop %edxpop %ebxinc %eax

push $0x616b6157push %espinc %eax

pop %ecxint $0x80pop %eaxpop %eaxpop %eaxret

Mnemonic has a rhythm, "push-pop-inc".

Comments While EAX first set as zero increases every sectionby the inc instruction, the value of EAX was divertedand other parameters are set. This seems to be the

flow of a brook. There is a rhythm which is skipped ina mnemonic like "push-pop-push-inc, push-push-inc"and "push-pop-pop-inc, push-push-inc". The sight ofthe children who play the side of a brook is made toconsider. The theme the "summer vacation" is often

expressed.

Muchtankassion!

Information

Book of assembly

language tanka!

Assembly programming in 31 bytes

World of assemblylanguage tanka

Tankists:Sakai Hiroaki

Aiko Kenji Matsuda Kazuki Sakai Takeyasu

Takesako Yoshinori

Now on sale!

Event for book! (January 20) "2014 Let's try assembly language tanka!"

at Mynavi Room

Today'smain

subject!

What is the most tankaful architecture?

RISC architecture: Instruction is fixed in 4 bytes.

If flexible instruction, most architecture has

machine code of even length.

Untankable!

Tankablearchitectures

x86(Intel) M32C(Mitsubishi) MN10300(Panasonic)

RL78(Renesas) RX(Renesas) Xtensa(Tensilica)

Results

RX(Renesas Electronics)

Assemblymov.l #1, r1mov.l #10, r3nop

mov.l #0x6c6c6548, [r0]nop

mov.l #0x6c72, 8[r0] mov.l #0x6f57206f, 4[r0]

mov.l r0, r2mov.l #5, r5int #255

Uppersection

Lowersection

Execution

Hello Worl

(10 letters)

RL78(Renesas Electronics)

Hello Wor

(9 letters)

Others

MN10300

M32CHello Wo

Hello!

(8 letters)

(6 letters)

i386/FreeBSD

x86/LinuxHello World!

Hello World!!

(12 letters)

(13 letters)

Let'scompare.

Beforecomparison

For quantification, a unit is needed.

Define a unitBPT (Byte per Tanka)

How tankafulfor tanking.

Example on RXhello Worl

10 letters: 10BPT

Aggregation

M32C 6BPTMN10300 8BPTRL78 9BPTRX 10BPTi386/FreeBSD12BPTx86/Linux 13BPT

x86 is very tankaful

architecture! (and, Linux too)

Thank youfor my tanking!