Add x86_64 asm

Signed-off-by: Carlos Maiolino <[email protected]>

1 files changed, 17 insertions, 0 deletions

diff --git a/x86_64/reg_size.s b/x86_64/reg_size.s
new file mode 100644
index 0000000..e374922
--- /dev/null
+++ b/x86_64/reg_size.s
@@ -0,0 +1,17 @@
+# Program to play around with different register sizes
+
+.set exit_num, 60
+
+.section .text
+.globl _start
+
+_start:
+	movw	$0b0000101000000101, %bx  #10d and 5d into high and low registers
+	addb	%bh, %bl
+	movb	$0, %bh
+
+	# %bh now contains 10+5, use it as an argument to exit()
+
+	movq	%rbx, %rdi
+	movq	$exit_num, %rax
+	syscall