;this file holds code for speed testing (note: smaller #s are faster!!)

c1 macro
  ;place code here
  inc esi
  inc esi
endm

c2 macro
  ;place alternate code here
  add esi,2
endm

COMMENT !  The following are examples it's tested.

c1 macro      ;7 cylces
  xor cx,cx
  dec cx
endm

c2 macro
  mov cx,-1   ;5 cycles  ;faster
endm

c1 macro
  xor ebx,ebx    ;535 (faster)
  mov bl,al
endm

;This is the 2nd code to be compared
c2 macro
  movzx ebx,al   ;753
endm

;This is the 1st code to be compared
c1 macro
  xor ebx,ebx    ;640 (faster)
  mov bx,ax
endm

;This is the 2nd code to be compared
c2 macro
  movzx ebx,ax   ;747
endm

c1 macro
  push eax
  push ebx
  push ecx
  push edx
  push esi
  push edi
  push ebp
  push esp
  xor eax,eax
  pop esp
  pop ebp
  pop edi
  pop esi
  pop edx
  pop ecx
  pop ebx
  pop eax
endm
c2 macro
  pushad
  xor eax,eax
  popad
endm

;Finding #1 loop vs. dec/jnz
c1 macro         ;5647 (faster)
  mov ecx,10
t1:
  dec ecx
  jnz t1
endm
c2 macro         ;9193
  mov ecx,10
t2:
  loop t2
endm

;Finding #2 mov vs. xor (clearing)
c1 macro         ;same
  mov ecx,0
endm
c2 macro         ;same ? - (only because of caching) - once I disable cache
  xor ecx,ecx    ;the proper anwser should arise
endm

;Finding #3 xor vs. movzx (word)
c1 macro         ;640 (faster)
  xor eax,eax
  xor ebx,ebx
  mov bx,ax
endm
c2 macro         ;870
  xor eax,eax
  movzx ebx,ax
endm

;Finding #4 xor vs. movzx (byte)
c1 macro         ;533 (faster)
  xor eax,eax
  xor ebx,ebx
  mov bl,al
endm
c2 macro         ;833
  xor eax,eax
  movzx ebx,al
endm

;Finding #5 imul vs. lea
c1 macro
  mov eax,2      ;1386
  imul eax,3
endm
c2 macro
  mov eax,2      ;640 (faster)
  lea eax,[eax+eax*2]
endm

;Finding #6 Pipeline cache
c1 macro                 ; These are both identical but I was testing out
  cld                    ; my new Pipeline cache
  mov esi,offset junk    ; w/o Pipeline = 20170
  mov edi,offset junk    ;  w/ Pipeline = 15486  (23% faster)
  mov ecx,0ffffh
  rep movsb
endm
c2 macro
  cld
  mov esi,offset junk
  mov edi,offset junk
  mov ecx,0ffffh
  rep movsb
endm
.data
  junk db 10000h dup (12h)
.code

!