objdump of CVomit::UpdateAbility() + proposed patch

cvomit_updateability.asm

/opt/srcds/left4dead2/left4dead2/bin/server.so:     file format elf32-i386


Disassembly of section .text:

002af3f2 <_ZN6CVomit13UpdateAbilityEv>:
- snip - 
  2af6dd:	8d 50 08             	lea    edx,[eax+0x8]
  2af6e0:	89 95 64 fe ff ff    	mov    DWORD PTR [ebp-0x19c],edx
  2af6e6:	8b 45 b8             	mov    eax,DWORD PTR [ebp-0x48]
  2af6e9:	89 45 94             	mov    DWORD PTR [ebp-0x6c],eax
  2af6ec:	8b 45 bc             	mov    eax,DWORD PTR [ebp-0x44]
  2af6ef:	89 45 98             	mov    DWORD PTR [ebp-0x68],eax
  2af6f2:	8b 45 c0             	mov    eax,DWORD PTR [ebp-0x40]
  2af6f5:	89 45 9c             	mov    DWORD PTR [ebp-0x64],eax
  2af6f8:	8b 8b fc f4 ff ff    	mov    ecx,DWORD PTR [ebx-0xb04]  ; replace with mov eax, 3D088889h (0.0333335); NOP : b8 89 88 08 3d 90
  2af6fe:	8b 01                	mov    eax,DWORD PTR [ecx] ; replace with NOP; NOP; 90 90
  2af700:	d9 40 10             	fld    DWORD PTR [eax+0x10] ; replace with fld eax; NOP; : d9 c0 90
  2af703:	d9 85 7c fe ff ff    	fld    DWORD PTR [ebp-0x184]
  2af709:	d8 c9                	fmul   st,st(1)
  2af70b:	d8 45 bc             	fadd   DWORD PTR [ebp-0x44]
  2af70e:	d9 85 78 fe ff ff    	fld    DWORD PTR [ebp-0x188]
  2af714:	d8 ca                	fmul   st,st(2)
  2af716:	d8 45 c0             	fadd   DWORD PTR [ebp-0x40]
  2af719:	d9 ca                	fxch   st(2)
  2af71b:	d8 8d 80 fe ff ff    	fmul   DWORD PTR [ebp-0x180]
  2af721:	d8 45 b8             	fadd   DWORD PTR [ebp-0x48]
  2af724:	d9 5d b8             	fstp   DWORD PTR [ebp-0x48]
  2af727:	d9 5d bc             	fstp   DWORD PTR [ebp-0x44]
  2af72a:	d9 5d c0             	fstp   DWORD PTR [ebp-0x40]
  2af72d:	d9 85 70 fe ff ff    	fld    DWORD PTR [ebp-0x190]
  2af733:	d8 40 10             	fadd   DWORD PTR [eax+0x10]  ; replace with fadd eax; NOP : d8 c0 90
  2af736:	d9 95 70 fe ff ff    	fst    DWORD PTR [ebp-0x190]
  2af73c:	d9 85 60 fe ff ff    	fld    DWORD PTR [ebp-0x1a0]
  2af742:	d9 c9                	fxch   st(1)
  2af744:	df e9                	fucomip st,st(1)
  2af746:	dd d8                	fstp   st(0)
  2af748:	0f 87 5e 06 00 00    	ja     2afdac <_ZN6CVomit13UpdateAbilityEv+0x9ba>
  2af74e:	8b 83 a8 c6 08 00    	mov    eax,DWORD PTR [ebx+0x8c6a8]
  2af754:	8b 48 30             	mov    ecx,DWORD PTR [eax+0x30]
  2af757:	85 c9                	test   ecx,ecx
  2af759:	0f 85 f7 04 00 00    	jne    2afc56 
-snip-