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-rw-r--r--preveven.asm44
1 files changed, 44 insertions, 0 deletions
diff --git a/preveven.asm b/preveven.asm
new file mode 100644
index 0000000..89aa327
--- /dev/null
+++ b/preveven.asm
@@ -0,0 +1,44 @@
+format ELF64
+
+extrn printf
+extrn puts
+extrn scanf
+public main
+
+section '.text' executable
+
+main:
+ push rbp
+ mov rbp,rsp
+
+ mov edi,prompt
+ call puts
+
+ sub rsp,16
+
+ mov rsi,rsp
+ mov edi,readint
+ xor eax,eax
+ call scanf
+
+ mov rax,[rsp]
+
+ add rsp,16
+
+ mov rdx,rax
+ and rdx,1
+ sub rax,rdx
+
+ mov rsi,rax
+ mov edi,msg
+ xor eax,eax
+ call printf
+
+ leave
+ ret
+
+section '.data' writable align 16
+
+msg db "Next even integer is %ld",0xA,0
+prompt db "Enter an odd integer.",0
+readint db "%ld",0