even_odd

even_odd/.vscode/launch.json

@@ -0,0 +1,29 @@
+{
+    "version": "0.2.0",
+    "configurations": [
+        {
+            "name": "(lldb) Launch x64",
+            "type": "lldb",
+            "request": "launch",
+            "program": "${workspaceFolder}/build/even_odd",
+            "cwd": "${workspaceFolder}/build",
+            "preLaunchTask": "asm64",
+        },
+        {
+            "name": "(gdb) Launch x64",
+            "type": "cppdbg",
+            "request": "launch",
+            "program": "${workspaceFolder}/build/even_odd",
+            "cwd": "${workspaceFolder}/build",
+            "preLaunchTask": "asm64"
+        },
+        {
+            "name": "(gdb+gcc) Launch x64",
+            "type": "cppdbg",
+            "request": "launch",
+            "program": "${workspaceFolder}/build/even_odd",
+            "cwd": "${workspaceFolder}/build",
+            "preLaunchTask": "asm64+gcc"
+        }
+    ]
+}

even_odd/.vscode/tasks.json

@@ -0,0 +1,53 @@
+{
+    "version": "2.0.0",
+    "tasks": [
+        {
+            "label": "asm64",
+            "type": "shell",
+            "command": [
+                "builddir=${workspaceFolder}/build;",
+                "mkdir -p $builddir;",
+                "rawfilename=$builddir/even_odd;",
+                "nasm -gdwarf -f elf64 -o $rawfilename.o ${workspaceFolder}/even_odd.asm;",
+                "ld -g -o $rawfilename $rawfilename.o;"
+            ],
+            "problemMatcher": {
+                "pattern": {
+                    "regexp": "error"
+                }
+            },
+            "presentation": {
+                "focus": true,
+                "panel": "dedicated",
+                "reveal": "silent",
+                "clear": true
+            },
+            "group": {
+                "kind": "build",
+                "isDefault": true
+            }
+        },
+        {
+            "label": "asm64+gcc",
+            "type": "shell",
+            "command": [
+                "builddir=${workspaceFolder}/build;",
+                "mkdir -p $builddir;",
+                "rawfilename=$builddir/even_odd;",
+                "nasm -gdwarf -f elf64 -o $rawfilename.o ${workspaceFolder}/even_odd.asm;",
+                "gcc -o $rawfilename $rawfilename.o;"
+            ],
+            "problemMatcher": {
+                "pattern": {
+                    "regexp": "error"
+                }
+            },
+            "presentation": {
+                "focus": true,
+                "panel": "dedicated",
+                "reveal": "silent",
+                "clear": true
+            },
+        }
+    ]
+}

even_odd/even_odd.asm

@@ -0,0 +1,80 @@
+global _start
+
+section .data
+buff times 32 db 0
+count dq 0
+even db "Even"
+evenCount dq $-even
+odd db "Odd"
+oddCount dq $-odd
+
+section .text
+default rel
+
+_start:
+    call read_text
+    
+    lea rsi, [buff]
+    add rsi, qword [count]
+    sub rsi, 2
+    mov rax, [rsi]
+
+    test rax, 0x1
+    jnz .even
+.odd:
+    lea rsi, [even]
+    mov rdx, [evenCount]
+    jmp .write
+.even:
+    lea rsi, [odd]
+    mov rdx, [oddCount]
+
+.write:
+    call write_text
+
+    mov rax, 60
+    mov rdi, 0
+    syscall
+
+; Функция читает текст в буффер
+; Регистры не изменяет
+read_text:
+    push rax
+    push rdi
+    push rsi
+    push rdx
+
+    mov rax, 0          ; sys_read
+    mov rdi, 0          ; stdin
+    lea rsi, [rel buff]       ; адрес буфера
+    mov rdx, 256        ; количество байт
+    syscall
+    mov [count], rax
+
+    pop rdx
+    pop rsi
+    pop rdi
+    pop rax
+    ret
+
+; Функция выводит buff
+; In:
+;   - RSI - начало буфера
+;   - RDX - размер буфера
+; Регистры не изменяет
+write_text:
+    push rax
+    push rdi
+    push rsi
+    push rdx
+
+    mov rax, 1          ; sys_write
+    mov rdi, 1          ; stdout
+    syscall
+    mov [count], rax
+
+    pop rdx
+    pop rsi
+    pop rdi
+    pop rax
+    ret

nasm.code-workspace

@@ -6,6 +6,9 @@
 		{
 			"path": "sum"
 		},
+		{
+			"path": "even_odd"
+		},
 		{
 			"path": "docs"
 		}

sum/sum.asm

@@ -1,7 +1,7 @@
 global _start
 
 section .data
-buff times 256 db 0
+buff times 32 db 0
 buffend:
 count dq 0