From cde9cf2e6507bff9c81173b11061a8b120837c79 Mon Sep 17 00:00:00 2001 From: kokke Date: Mon, 2 Jun 2014 22:35:03 +0200 Subject: Update README.md --- README.md | 13 +++++++++++++ 1 file changed, 13 insertions(+) (limited to 'README.md') diff --git a/README.md b/README.md index 0076869..a3dce0a 100644 --- a/README.md +++ b/README.md @@ -17,12 +17,25 @@ GCC size output when compiled for ARM: $ size aes.o text data bss dec hex filename 1079 0 204 1283 503 aes.o + $ arm-none-eabi-gcc -O2 -c aes.c -o aes.o $ size aes.o text data bss dec hex filename 1024 0 204 1228 4cc aes.o +And if we're compiling for the Thumb ISA: + + $ arm-none-eabi-gcc -O2 -c -mthumb aes.c -o aes.o + $ size aes.o + text data bss dec hex filename + 856 0 204 1060 424 aes.o + $ arm-none-eabi-gcc -Os -c -mthumb aes.c -o aes.o + $ size aes.o + text data bss dec hex filename + 867 0 204 1071 42f aes.o + + Somehow, -O2 is a bit smaller than -Os with this compiler. I am using Mentor Graphics ARM toolchain: -- cgit v1.2.3