From: David Gow <david@ingeniumdigital.com>
Date: Fri, 4 Jul 2014 13:47:33 +0000 (+0800)
Subject: Use the lea instruction to reduce number of "inc"s
X-Git-Url: https://git.ucc.asn.au/?p=ipdf%2Fcode.git;a=commitdiff_plain;h=35e78b378435e37ffdb6e53a97f6fa0998999f67

Use the lea instruction to reduce number of "inc"s
---

diff --git a/src/tests/add_digits.s b/src/tests/add_digits.s
index 09d4ea3..39f4af9 100644
--- a/src/tests/add_digits.s
+++ b/src/tests/add_digits.s
@@ -16,23 +16,9 @@ add_digits:
 		jz end_loop # We are done
 		
 		# Move to next element in the first array
-		inc %rdi
-		inc %rdi
-		inc %rdi
-		inc %rdi
-		inc %rdi
-		inc %rdi
-		inc %rdi
-		inc %rdi
+		leaq 8(,%rdi,1), %rdi
 		# Move to next element in the second array
-		inc %rsi
-		inc %rsi
-		inc %rsi
-		inc %rsi
-		inc %rsi
-		inc %rsi
-		inc %rsi
-		inc %rsi
+		leaq 8(,%rsi,1), %rsi
 		jmp loop # Repeat
 	end_loop:
 		movq $0, %rax