YES IT DOES NOT SEGFAULT

Makefile

@@ -8,8 +8,8 @@ DEBUG_LD_FLAGS := -g
 DEBUG_NASM_FLAGS := -g -F dwarf
 
 # check for avx2 support
-ifeq ($(shell grep -o 'avx2[^ ]*' /proc/cpuinfo | head -n 1),avx2)
+ifeq ($(shell grep -o 'avx512[^ ]*' /proc/cpuinfo | head -n 1),avx512)
-    NASM_FLAGS += -DAVX2
+    NASM_FLAGS += -DAVX512
 endif
 
 

src/alloc.asm

@@ -16,8 +16,8 @@ global alloc
 alloc:; Takes lenght of data in rdi and returns pointer in rax
 	mov rax, SYS_BRK
 	mov qword rcx, [brk_pointer]
-	add rdi, rcx; calculate new BRK address
 	push rcx
+	add rdi, rcx; calculate new BRK address
 	syscall
 	mov [brk_pointer], rax
 	pop rax

src/drawing.asm

@@ -12,7 +12,10 @@ section .rodata
 	clear: 		db ESC_CHAR, "[2J", 0
 	reset:		db ESC_CHAR, "[0m", 0
 
-	statusbar:	db ESC_CHAR, "[100m", "Use arrow keys to move cursor, enter to invert cell, p to       simulation", 0 
+	home_cursor:	db ESC_CHAR, "[H", 0
+
+	statusbar:	db ESC_CHAR, "[100m", "Use arrow keys to move cursor, enter to invert cell h/j to change simulation speed, p to       simulation", 0
+	%define START_STOP_position $-statusbar-16
 	
 	start_str:	db "START", 0
 	stop_str:	db "STOP", 0
@@ -20,39 +23,55 @@ section .rodata
 section .text 
 extern print_str
 extern string_copy
+extern memory_set
 
+global init_gameboard
 init_gameboard:
+	xor rax, rax
+	xor rcx, rcx
+
 	mov ax, [term_cols]
 	mov cx, [term_rows]
 	mul rcx
+	
+	push rax
+	push rcx
+	mov rdi, [gameboard_ptr]
+	mov rsi, 0x20; set rsi to SPACE character
+	mov rdx, rax
+	call memory_set
+	pop rcx
+	pop rax
 
 	mov rdx, rax
 	sub rdx, rcx; get pointer to start of last line
 	
-	lea rdi, [gameboard_ptr]
+	mov rdi, [gameboard_ptr]
 	add rdi, rax; get end of gameboard 
 	
-	sub rdi, 5; get space for reset sequence
+	sub rdi, 4; get space for reset sequence
 	
 	lea rsi, [reset]
 
 	push rdx
 	call string_copy
 
+
 	pop rdx
 	mov rdi, rdx
+	add rdi, [gameboard_ptr]
 	lea rsi, [statusbar]
 	call string_copy
 
 	ret
 	
-
+global print_game_ui
 print_game_ui:
-	lea rdi, [clear]
+	lea rdi, [home_cursor]
+	call print_str
+	
+	mov qword rdi, [gameboard_ptr]
 	call print_str
-
-
-
 	
 	
 	ret

src/main.asm

@@ -21,6 +21,9 @@ extern unsigned_int_to_ascii
 extern init_alloc
 extern alloc
 
+extern init_gameboard
+extern print_game_ui
+
 global _start
 _start:
 	; get terminal dimensions
@@ -45,12 +48,20 @@ _start:
 
 	call init_alloc
 
+	xor rax, rax
+	xor rcx, rcx
+
 	mov ax, [term_rows]
 	mov cx, [term_cols]
 	mul rcx
 	mov rdi, rax
+	inc rdi; addition byte for NULL BYTE
 	call alloc
 	mov [gameboard_ptr], rax; stores pointer to gameboard array
+	call init_gameboard
+
+	call print_game_ui	
+
 
 
 

src/str.asm

@@ -64,7 +64,7 @@ global string_copy
 string_copy:; takes pointer to destination in rdi and pointer to source in rsi
 	
 	xor rax, rax
-
+	xor rcx, rcx
 	.copy_next_byte:
 	mov byte cl, [rsi+rax]
 	test cl, cl
@@ -84,17 +84,20 @@ memory_set:; takes  destination in rdi, byte in sil and lenght in rdx
 
 	mov rax, rdi
 	and rax, 0xF; offset is stored in rax
+
+	mov r11, 0x0101010101010101; to extend across whoule register
+	movzx rsi, sil
+	imul r11, rsi; to extend across whoule register
+
 	test al, al; check if resault is 0
 	jz .addr_is_16_Byte_alligned
+	mov rax, r11
+
 	mov r8b, 16
 	sub r8b, al; now offset to first higher 16 byte alligned address is stored in r8
 	sub rdx, r8; we will write these bytes now
 	
-	movzx rax, sil
+		;add rdi, rdx
-	imul rax, 0x01010101; to extend across whoule register
-	shl rax, 32; to extend across whoule register
-
-	;add rdi, rdx
 	; we know that rdi has initial address and rdx offset so well fill just add to it
 	mov rcx, 1; we will allwais copy only once
 	
@@ -123,10 +126,10 @@ memory_set:; takes  destination in rdi, byte in sil and lenght in rdx
 	.addr_is_16_Byte_alligned:
 	shr rdx, 4; set it to how many 128bit(16Byte) chunk we need 
 	
-	%ifdef AVX2
+	%ifdef AVX512
-		vpbroadcastq xmm8, rax
+		vpbroadcastq xmm8, r11
 	%else
-		movq xmm8, rax
+		movq xmm8, r11
 		shufpd xmm8, xmm8, 0x00
 	%endif