glibc-memcmp-avx2-notes

1. A simple note for reading glibc memcmp asm code

2. A new version of memcmp which add a fourth parameter to return the first memory addr that diff.

Compile

Put two file in same dir, compile with command

gcc -ggdb -o memcmpGlibcASMTester memcmpGlibcASMTester.c memcmp-avx2-addr.S

run with

./memcmpGlibcASM

Performance

Tested with all zeros.