From e618f37cf0be91c4ce7bdb3c02867b452883bcd2 Mon Sep 17 00:00:00 2001
From: Camden Dixie O'Brien <cdo@wip.sh>
Date: Fri, 8 Nov 2024 17:52:52 +0000
Subject: [PATCH] Print result

---
 postfix.s | 42 +++++++++++++++++++++++++++++++++++++++---
 1 file changed, 39 insertions(+), 3 deletions(-)

diff --git a/postfix.s b/postfix.s
index 5da174a..64b16a2 100644
--- a/postfix.s
+++ b/postfix.s
@@ -106,10 +106,9 @@ dodivide:
 	mov $1,%rdx
 
 endword:
-	## Go back to start if the terminating character (which is in R8)
-	## of the word was a line feed
+	## Handle end of line
 	cmp $0x0a, %r8
-	je _start
+	je endline
 
 	## Add the word length to RSI and increment until non-space is
 	## found
@@ -124,6 +123,43 @@ spaceloop:
 	mov $0, %rdx
 	jmp wordloop
 
+endline:
+	mov $buf,%rsi
+	add $100,%rsi
+	mov $1,%rcx
+
+	## Add line feed at end of buffer
+	movb $0x0a,(%rsi)
+
+	## Set base and pop value
+	mov $10,%r8
+	pop %rax
+formatloop:
+	dec %rsi
+	inc %rcx
+
+	## Divide RAX by ten to get unformatted value (RAX) and current
+	## digit value (RDX)
+	mov $0,%rdx
+	idiv %r8
+
+	## Write character for digit into buffer
+	add $0x30,%rdx
+	movb %dl,(%rsi)
+
+	## Loop if the unformatted value is non-zero
+	cmp $0,%rax
+	jne formatloop
+
+	## Print value
+	mov $1,%rax
+	mov $1,%rdi
+	mov %rcx,%rdx
+	syscall
+
+	## Return to top
+	jmp _start
+
 exit:
 	## Exit with code 0
 	mov $60, %rax