Практика

Практика/Практика учебная 3 курс 2 семестр/Ассемблер/Makefile

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+ifdef SystemRoot
+   format = win32
+   rm = del
+   ext = .exe
+else
+   format = elf
+   rm = rm -f
+   ext = 
+endif
+
+all: primes.o
+	gcc primes.o -o primes$(ext)
+	$(rm) primes.o
+
+primes.o:
+	nasm -f $(format) main.asm -o primes.o

Практика/Практика учебная 3 курс 2 семестр/Ассемблер/functions.asm

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+;
+;
+; ÔÓÍÊÖÈÈ
+; Ðåçóëüòàò çàïèñûâàåòñÿ â EAX, ñòàòóñ - â EDX.
+;  ñëó÷àå óñïåõà EDX ñîäåðæèò çíà÷åíèå SUCCESS (0),
+; èí÷àå - àäðåñ ñîîáùåíèÿ îá îøèáêå.
+;
+;
+
+; Ââåñòè ìàêñèìàëüíîå ÷èñëî
+; Ðåçóëüòàò: EAX - ìàêñèìàëüíîå ÷èñëî
+input_max_number:	
+	;ñîçäàòü ñòåê-ôðåéì,
+	;4 áàéòà äëÿ ëîêàëüíûõ ïåðåìåííûõ
+	enter 4, 1
+
+	;ïîêàçûâàåì ïîäïèñü
+	push str_max_number_label ;ñì. string_constants.asm
+	call _printf
+	add esp, 4
+
+	;âûçûâàåì scanf
+	mov eax, ebp
+	sub eax, 4
+	
+	push eax
+	push str_max_number_input_format ;ñì. string_constants.asm
+	call _scanf
+	add esp, 8
+	
+	mov eax, [ebp-4]
+
+	;ïðîâåðêà
+	cmp eax, MIN_MAX_NUMBER
+	jb .number_too_little
+	cmp eax, MAX_MAX_NUMBER
+	ja .number_too_big
+	jmp .success
+
+	;âûõîä
+	.number_too_little:
+		mov edx, str_error_max_num_too_little ;ñì. string_constants.asm
+		jmp .return	
+		
+	.number_too_big:
+		mov edx, str_error_max_num_too_big ;ñì. string_constants.asm
+		jmp .return	
+
+	.success:
+		push eax
+		push str_max_number_output_format ;ñì. string_constants.asm
+		call _printf
+		add esp, 4
+		pop eax
+		mov edx, SUCCESS
+	
+	.return:
+		leave
+		ret
+
+
+; Âûäåëèòü ïàìÿòü äëÿ ìàññèâà ôëàãîâ
+; Àðãóìåíò: EAX - ìàêñèìàëüíîå ÷èñëî
+; Ðåçóëüòàò: EAX - óêàçàòåëü íà ïàìÿòü
+allocate_flags_memory:
+	enter 8, 1
+
+	;âûäåëèòü EAX+1 áàéò
+	inc eax
+	mov [ebp-4], eax
+	
+	push eax
+	call _malloc
+	add esp, 4
+	
+	;ïðîâåðêà
+	cmp eax, 0
+	je .fail
+	mov [ebp-8], eax
+	
+	;èíèöèàëèçàöèÿ
+	mov byte [eax], 0
+	
+	cld
+	mov edi, eax
+	inc edi
+	mov edx, [ebp-4]
+	add edx, eax
+	
+	mov al, 1
+	.write_true:
+		stosb
+		cmp edi, edx
+		jb .write_true
+	
+	;âûõîä
+	mov eax, [ebp-8]
+	jmp .success
+	
+	.fail:
+		mov edx, str_error_malloc_failed ;ñì. string_constants.asm
+		jmp .return
+	
+	.success:
+		mov edx, SUCCESS
+			
+	.return:
+		leave
+		ret
+
+; Îñâîáîäèòü ïàìÿòü îò ìàññèâà ôëàãîâ
+; Àðãóìåíò: EAX - óêàçàòåëü íà ïàìÿòü
+free_flags_memory:
+	enter 0, 1
+	
+	push eax
+	call _free
+	add esp, 4
+	
+	leave
+	ret
+	
+	
+;Íàéòè ïðîñòûå ÷èñëà ñ ïîìîùüþ ðåøåòà Ýðàòîñôåíà
+;Àðãóìåíòû: EAX - óêàçàòåëü íà ìàññèâ ôëàãîâ, EBX - ìàêñèìàëüíîå ÷èñëî	
+find_primes_with_eratosthenes_sieve:
+	enter 8, 1
+	mov [ebp-4], eax
+		
+	add eax, ebx
+	inc eax
+	mov [ebp-8], eax
+	
+	;âû÷åðêèâàåì ñîñòàâíûå ÷èñëà
+	cld
+	mov edx, 2 ;p = 2
+	mov ecx, 2 ;ìíîæèòåëü ñ = 2
+	.strike_out_cycle:
+		;x = c*p
+		mov eax, edx
+		push edx
+		mul ecx
+		pop edx
+		
+		cmp eax, ebx
+		jbe .strike_out_number
+		jmp .increase_p
+		
+		.strike_out_number:
+			mov edi, [ebp-4]
+			add edi, eax
+			mov byte [edi], 0
+			inc ecx ;c = c + 1
+			jmp .strike_out_cycle
+			
+		.increase_p:
+			mov esi, [ebp-4]
+			add esi, edx
+			inc esi
+			
+			mov ecx, edx
+			inc ecx
+			.check_current_number:
+				mov eax, ecx
+				mul eax
+				cmp eax, ebx
+				ja .return
+			
+				lodsb
+				inc ecx
+				cmp al, 0
+				jne .new_p_found
+				jmp .check_current_number
+			
+				.new_p_found:
+					mov edx, ecx
+					dec edx
+					mov ecx, 2
+					jmp .strike_out_cycle			
+	
+	.return:
+		leave
+		ret
+		
+
+; Âûâåñòè ïðîñòûå ÷èñëà
+; Ïàðàìåòðû: EAX - óêàçàòåëü íà ìàññèâ ôëàãîâ, EBX - ìàêñèìàëüíîå ÷èñëî
+print_primes:
+	enter 12, 1
+	mov [ebp-4], eax
+	mov [ebp-8], ebx
+	
+	push str_print_primes_label
+	call _printf
+	add esp, 4
+	
+	cld
+	mov esi, [ebp-4]
+	mov edx, esi
+	add edx, [ebp-8]
+	inc edx
+	
+	mov [ebp-12], edx
+	mov ecx, 0
+	.print_cycle:
+		lodsb
+		cmp al, 0
+		jne .print
+		jmp .check_finish
+		.print:
+			push esi
+			push ecx
+			push str_prime ;ñì. string_constants.asm
+			call _printf
+			add esp, 4
+			pop ecx
+			pop esi
+			mov edx, [ebp-12]
+		.check_finish:
+			inc ecx
+			cmp esi, edx
+			jb .print_cycle
+			
+	push str_cr_lf
+	call _printf
+	add esp, 4
+			
+	leave
+	ret

Практика/Практика учебная 3 курс 2 семестр/Ассемблер/main.asm

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+%define SUCCESS 0
+%define MIN_MAX_NUMBER 3
+%define MAX_MAX_NUMBER 4294967294
+
+global _main
+extern _printf
+extern _scanf
+extern _malloc
+extern _free
+
+SECTION .text
+_main:
+	enter 0, 0
+	
+	;ââîä ìàêñèìàëüíîãî ÷èñëà
+	call input_max_number
+	cmp edx, SUCCESS
+	jne .custom_exit
+	mov [max_number], eax
+	
+	;âûäåëÿåì ïàìÿòü äëÿ ìàññèâà ôëàãîâ
+	mov eax, [max_number]
+	call allocate_flags_memory
+	cmp edx, SUCCESS
+	jne .custom_exit
+	mov [primes_pointer], eax
+	
+	;îòñåÿòü ñîñòàâíûå ÷èñëà
+	mov eax, [primes_pointer]
+	mov ebx, [max_number]
+	call find_primes_with_eratosthenes_sieve
+	
+	;âûâåñòè ÷èñëà
+	mov eax, [primes_pointer]
+	mov ebx, [max_number]
+	call print_primes
+	
+	;îñâîáîäèòü ïàìÿòü îò ìàññèâà ôëàãîâ
+	mov eax, [primes_pointer]
+	call free_flags_memory
+	
+	;âûõîä
+	.success:
+		push str_exit_success
+		call _printf
+		jmp .return
+			
+	.custom_exit:
+		push edx
+		call _printf
+		
+	.return:
+		mov eax, SUCCESS
+		leave
+		ret
+	
+	%include "functions.asm"
+
+SECTION .data
+	max_number: dd 0
+	primes_pointer: dd 0
+	
+	%include "string_constatns.asm"

Практика/Практика учебная 3 курс 2 семестр/Ассемблер/string_constatns.asm

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+;ïîäïèñè ââîäà-âûâîäà, ôîðìàòû
+str_max_number_label: db "Max number (>=3): ", 0
+str_max_number_input_format: db "%u", 0
+str_max_number_output_format: db "Using max number %u", 0xD, 0xA, 0
+
+str_print_primes_label: db "Primes:", 0xD, 0xA, 0
+str_prime: db "%u", 0x9, 0
+str_cr_lf: db 0xD, 0xA, 0
+	
+;ñîîáùåíèÿ âûõîäà
+str_exit_success: db "Success!", 0xD, 0xA, 0
+str_error_max_num_too_little: db "Max number is too little!", 0xD, 0xA, 0
+str_error_max_num_too_big: db "Max number is too big!", 0xD, 0xA, 0
+str_error_malloc_failed: db "Can't allocate memory!", 0xD, 0xA, 0