adding 3 NOPs.

The purpose of this directive is to improve performance for cases like loops
where better alignment (8 or 16 instead of 4) might be helpful. This directive
exists in PPC64 assembler and is frequently used by PPC64 assembler writers.

PCALIGN $16
PCALIGN $8

By default, functions in Go are aligned to 16 bytes, as is the case in all

may include command line options.

The cgo tool will always invoke the C compiler with the source file's
directory in the include path; i.e. -I${SRCDIR} is always implied. This
means that if a header file foo/bar.h exists both in the source
directory and also in the system include directory (or some other place
specified by a -I flag), then "#include <foo/bar.h>" will always find the
local version in preference to any other version.