From 3cc99fdcc68b96a93f1ad81f2dc89f16a67abcd0 Mon Sep 17 00:00:00 2001
From: Noah Weninger
Date: Mon, 31 Oct 2022 17:44:14 -0400
Subject: Golf x86 elf to 70 bytes & add UBC affiliation

---
 entries/nwoeanhinnogaehr/fib.asm | 59 +++++++++++++++-------------------------
 1 file changed, 22 insertions(+), 37 deletions(-)

(limited to 'entries')

diff --git a/entries/nwoeanhinnogaehr/fib.asm b/entries/nwoeanhinnogaehr/fib.asm
index 729958f..76ef7c8 100644
--- a/entries/nwoeanhinnogaehr/fib.asm
+++ b/entries/nwoeanhinnogaehr/fib.asm
@@ -1,7 +1,8 @@
-; assembles with nasm to an 81-byte ELF binary that works on x86 Linux
+; assembles with nasm to an 70-byte ELF binary that works on x86 Linux
+; is 64 bytes possible???
 
 bits 32
-org $25430000
+org $0d470000
     db $7F,"ELF" ; e_ident
     dd 1 ; p_type
     dd 0 ; p_offset
@@ -12,48 +13,32 @@ org $25430000
     dw (entry-$$)&0xffff ; e_entry, p_memsz
 
 entry:
-    inc ebx
-    and eax,strict dword 4 ;nop
-    inc esi ; 1
-    inc edi ; 1
-            ; 2
-            ; 3
-            ; 5
-            ; 8
-            ; ...
+    inc edi
+main:
+    ; print
+    or eax, strict dword 4
+    mov edx,esp
+    sub edx,ecx
+    inc edx
+    mov bl,1
+    int 0x80
 
-loop:
-    mov eax,esi
-    push 10
+    push $00010020
     mov ecx,esp
-    jmp skip
-    dw $20 ; e_phentsize
-    dw 1 ; e_phnum
-skip:
-    pop ebp
+    mov eax,edi
+
+    ; update fibbo
+    add edi,esi
+    xchg esi,eax
 
+    mov bl,10
 format:
     cdq
-    div ebp
-    inc ebx
-    dec ecx
+    div ebx ; SIGFPE on overflow
     or edx,'0'
+    dec ecx
     mov [ecx],dl
     test eax,eax
     jnz format
 
-print:
-    mov al,4
-    mov edx,ebx
-    mov bl,1
-    int 0x80
-
-    ;update fibbo
-    mov eax,edi
-    add edi,esi
-    xchg esi,eax
-
-    ;exit on overflow
-    jno loop
-    xchg eax,ebx
-    int 0x80
+    jmp main
-- 
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