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README.md

@@ -1,4 +1,6 @@
-2-nd-Term-MIPT-Info
+2-nd-Term-MIPT-Info
 ===================
 
-Информатика 2 семестр МФТИ, преподаватель - Васюков
+Home Tasks
+
+У нас были достаточно специфичные задания, но, в целом, почему бы и нет

Зачет по ассемблеру 2 семестр/00.asm

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+; Declare some external functions
+;
+        extern	printf		; the C function, to be called
+
+        SECTION .data		; Data section, initialized variables
+
+a:	dd	5
+b:	dd	-1
+c:	dd	8
+fmt:    db "Res = %d", 10, 0 ; The printf format, "\n",'0'
+
+
+        SECTION .text                   ; Code section.
+
+        global main		; the standard gcc entry point
+main:				; the program label for the entry point
+        push    ebp		; set up stack frame
+        mov     ebp,esp
+
+	push	dword [a]
+	push	dword [b]
+	push	dword [c]
+	call	maxofthree
+	add	esp, 12
+	
+        push    dword eax	; value of variable
+        push    dword fmt	; address of ctrl string
+        call    printf		; Call C function
+        add     esp, 8
+
+        mov     esp, ebp	; takedown stack frame
+        pop     ebp
+
+	mov	eax,0		; normal, no error, return value
+	ret			; return
+
+maxofthree:
+	mov	eax, [esp+4]
+	mov	ecx, [esp+8]
+	mov	edx, [esp+12]
+	cmp	eax, ecx
+	cmovl	eax, ecx
+	cmp	eax, edx
+	cmovl	eax, edx
+	ret

Зачет по ассемблеру 2 семестр/01.asm

@@ -0,0 +1,43 @@
+; Declare some external functions
+;
+        extern	printf		; the C function, to be called
+
+        SECTION .data		; Data section, initialized variables
+
+a:	dd	5
+b:	dd	6
+res:	dd	0
+fmt:    db "Res = %d", 10, 0 ; The printf format, "\n",'0'
+
+
+        SECTION .text                   ; Code section.
+
+        global main		; the standard gcc entry point
+main:				; the program label for the entry point
+        push    ebp		; set up stack frame
+        mov     ebp,esp
+
+	mov	eax, [a]
+	mov	ebx, [b]
+	imul	eax, ebx
+	mov	ecx, eax
+	mov	eax, [a]
+	add	eax, ebx
+	imul	eax, 2
+	cmp	eax, ecx
+	jle	ltmp1
+	mov	dword [res], 1
+	jmp	ltmp2
+ltmp1:	mov	dword [res], -1
+ltmp2:
+	
+        push    dword [res]	; value of variable a
+        push    dword fmt	; address of ctrl string
+        call    printf		; Call C function
+        add     esp, 8		; pop stack 3 push times 4 bytes
+
+        mov     esp, ebp	; takedown stack frame
+        pop     ebp
+
+	mov	eax,0		; normal, no error, return value
+	ret			; return

Зачет по ассемблеру 2 семестр/02.asm

@@ -0,0 +1,37 @@
+; Declare some external functions
+;
+        extern printf                   ; the C function to be called
+
+        SECTION .data                   ; Data section
+fmt:    db "Res = %d", 10, 0 ; The printf format, "\n",'0'
+
+	global	main
+	
+	section .text
+main:
+	push	8
+	push	7
+	push	15
+	push	3
+	call	sum
+	add	esp, 16
+
+	push	dword eax
+	push	dword fmt
+	call	printf
+	add	esp, 8
+	ret
+
+sum:
+	mov	ecx, [esp+4]		; length of array
+	mov     edx, 8                  ; address of first element
+	mov	eax, 0			; initial value
+	cmp	ecx, 0			; guard against non-positive lengths!
+	jle	done
+next:
+	add	eax, [esp+edx]
+	add	edx, 4
+	dec	ecx
+	jnz	next
+done:
+	ret              		; return value already in eax

Зачет по ассемблеру 2 семестр/03.asm

@@ -0,0 +1,50 @@
+; Declare some external functions
+;
+
+	extern	printf
+	extern	atoi
+
+	section	.data
+
+count:	dd	0
+sum:	dd	0
+format:	db	'%.15f', 10, 0
+error:	db	'There are no command line arguments to average', 10, 0
+
+	section .text
+
+	global	main
+
+main:
+	mov	ecx, [esp+4]		; argc
+	dec	ecx			; don't count program name
+	jz	nothingToAverage
+	mov	[count], ecx		; save number of real arguments
+	mov	edx, [esp+8]		; argv
+accumulate:
+	push	ecx			; save values across call to atoi
+	push	edx
+	push	dword [edx+ecx*4]	; argv[ecx]
+	call	atoi			; now eax has the int value of arg
+	add	esp, 4
+	pop	edx			; restore registers after atoi call
+	pop	ecx
+	add	[sum], eax
+	dec	ecx
+	jnz	accumulate		; more arguments?
+average:
+	fild	dword [sum]
+	fild	dword [count]
+	fdivp	st1, st0		; sum / count
+	sub	esp, 8			; make room for quotient on stack
+	fstp	qword [esp]		; "push" quotient
+	push	format			; push format string
+	call	printf
+	add	esp, 12			; 4 bytes format, 8 bytes number
+	ret
+
+nothingToAverage:
+	push	error
+	call	printf
+	add	esp, 4
+	ret

Зачет по ассемблеру 2 семестр/04.asm

@@ -0,0 +1,46 @@
+; Declare some external functions
+;
+
+	extern	printf
+
+	section .data
+fmt:	db	'Stage = %d', 10, 0
+resfmt:	db	'Res = %d', 10, 0
+
+	section .text
+
+	global main
+
+main:
+	push	4
+	call	factorial
+	add	esp, 4
+
+	push	dword eax
+	push	resfmt
+	call	printf
+	add	esp, 8
+
+	mov	eax,0
+	ret
+
+factorial:
+        mov     eax, [esp+4]
+	push	eax
+	push	dword eax
+	push	fmt
+	call	printf
+	add	esp, 8
+	pop	eax
+        cmp	eax, 1			; n <= 1
+        jnle	L1			; if not, go do a recursive call
+        mov	eax, 1			; otherwise return 1
+        jmp	L2
+L1:
+	dec	eax			; n-1
+	push	eax			; push argument
+	call	factorial		; do the call, result goes in eax
+	add	esp, 4			; get rid of argument
+	imul	eax, [esp+4]
+L2:
+	ret

Зачет по ассемблеру 2 семестр/05.asm

@@ -0,0 +1,45 @@
+; Declare some external functions
+;
+
+	extern	printf
+	extern	atoi
+
+	section	.data
+
+res:	dd	1
+format:	db	'Res = %d', 10, 0
+error:	db	'There are no command line arguments to process', 10, 0
+
+	section .text
+
+	global	main
+
+main:
+	mov	ecx, [esp+4]		; argc
+	dec	ecx			; don't count program name
+	jz	nothingToProcess
+	mov	edx, [esp+8]		; argv
+process:
+	push	ecx			; save values across call to atoi
+	push	edx
+	push	dword [edx+ecx*4]	; argv[ecx]
+	call	atoi			; now eax has the int value of arg
+	add	esp, 4
+	pop	edx			; restore registers after atoi call
+	pop	ecx
+	imul	eax, [res]
+	mov	[res], eax
+	dec	ecx
+	jnz	process			; more arguments?
+
+	push	dword eax
+	push	format			; push format string
+	call	printf
+	add	esp, 8			; 4 bytes format, 8 bytes number
+	ret
+
+nothingToProcess:
+	push	error
+	call	printf
+	add	esp, 4
+	ret

Зачет по ассемблеру 2 семестр/06.asm

@@ -0,0 +1,46 @@
+; Declare some external functions
+;
+
+	extern	printf
+
+	section .data
+fmt:	db	'Stage = %d', 10, 0
+resfmt:	db	'Res = %d', 10, 0
+
+	section .text
+
+	global main
+
+main:
+	push	4
+	call	recursion
+	add	esp, 4
+
+	push	dword eax
+	push	resfmt
+	call	printf
+	add	esp, 8
+
+	mov	eax,0
+	ret
+
+recursion:
+        mov     eax, [esp+4]
+	push	eax
+	push	dword eax
+	push	fmt
+	call	printf
+	add	esp, 8
+	pop	eax
+        cmp	eax, 1			; n <= 1
+        jnle	L1			; if not, go do a recursive call
+        mov	eax, 1			; otherwise return 1
+        jmp	L2
+L1:
+	dec	eax			; n-1
+	push	eax			; push argument
+	call	recursion		; do the call, result goes in eax
+	add	esp, 4			; get rid of argument
+	add	eax, [esp+4]
+L2:
+	ret

Зачет по ассемблеру 2 семестр/07.asm

@@ -0,0 +1,41 @@
+; Declare some external functions
+;
+
+	extern	printf
+
+	section .data
+fmt:	db	'String = %s', 10, 0
+str:	db	'Test String', 0
+len:	equ $-str
+
+	section .text
+
+	global main
+
+main:
+	push	dword str
+	push	dword fmt
+	call	printf
+	add	esp, 8
+
+	xor	ecx, ecx
+process:
+	mov	al, [str+ecx]
+	test	al, al
+	jz	done
+	cmp	al, 97
+	jl	next
+	cmp	al, 122
+	jg	next
+	sub	al, 32
+next:	mov	[str+ecx], al
+	inc	ecx
+	jmp	process
+
+done:
+	push	dword str
+	push	dword fmt
+	call	printf
+	add	esp, 8
+	mov	eax,0
+	ret