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Update README.md
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README.md
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README.md
@ -13,31 +13,14 @@ I've successfully used the code on 64bit x86, 32bit ARM and 8 bit AVR platforms.
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GCC size output when compiled for ARM:
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$ arm-none-eabi-gcc -Os -c aes.c -o aes.o
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$ size aes.o
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text data bss dec hex filename
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1079 0 204 1283 503 aes.o
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$ arm-none-eabi-gcc -O2 -c aes.c -o aes.o
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$ size aes.o
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text data bss dec hex filename
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1024 0 204 1228 4cc aes.o
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And if we're compiling for the Thumb ISA:
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$ arm-none-eabi-gcc -O2 -c -mthumb aes.c -o aes.o
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$ size aes.o
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text data bss dec hex filename
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856 0 204 1060 424 aes.o
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$ arm-none-eabi-gcc -Os -c -mthumb aes.c -o aes.o
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$ size aes.o
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text data bss dec hex filename
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867 0 204 1071 42f aes.o
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1107 0 204 1311 51f aes.o
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Somehow, -O2 is a bit smaller than -Os with this compiler. I am using Mentor Graphics ARM toolchain:
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I am using Mentor Graphics ARM toolchain:
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$ arm-none-eabi-gcc --version
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