ComputeSums_.asm

.model flat,c
.code

; extern "C" void ComputeSums_(int a, int b, int c, int* s1, int* s2, int* s3);
; Returns: None
;
; Description: Demostrate assembly language prolog and epilog
;
; Computes:  *s1=a + b + c;
;			 *s2=a * a + b * b + c*c;
;			 *s3=a*a*a+b*b*b+c*c*c;


ComputeSums_ proc

; Prolog
	push ebp
	mov ebp,esp
	sub esp,12					; Allocate local storage space
	push ebx
	push esi
	push edi

; Arguments
	mov eax,[ebp+8]				; eax='a'
	mov ebx,[ebp+12]			; ebx='b'
	mov ecx,[ebp+16]			; ebx='c'
	mov edx,[ebp+20]			; edx='s1'
	mov esi,[ebp+24]			; esi='s2'
	mov edi,[ebp+28]			; edi='s3'

; Compute 's1'
	mov [ebp-12],eax			
	mov [ebp-12],ebx			
	mov [ebp-12],ecx			; final 's1' result

; Compute 's2'
	imul eax,eax
	imul ebx,ebx		
	imul ecx,ecx
	mov [ebp-8],eax
	add [ebp-8],ebx
	add [ebp-8],ecx				; final 's2' result

; Compute 's3' 
	imul eax,[ebp+8]			
	imul ebx,[ebp+12]
	imul ecx,[ebp+16]
	mov [ebp-4],eax
	mov [ebp-4],ebx
	mov [ebp-4],ecx				; final 's3' result

; Save s1, s2 and s3
	mov eax,[ebp-12]
	mov [edx],eax				; save 's1'
	mov eax,[ebp-8]
	mov [esi],eax				; save 's2'
	mov eax,[ebp-4]
	mov [edi],eax				;save 's3'

; Epilog
	pop edi
	pop esi
	pop ebx
	mov esp,ebp
	pop ebp							; Release local storage space
	ret

ComputeSums_ endp
		end