You have to check that something that isn't standard C actually exists
before trying to use it...
Cc: Colin Ian King <colin.i.king@intel.com>
Signed-off-by: H. Peter Anvin (Intel) <hpa@zytor.com>
Turns out that the hotspots of nasm are mainly on string hashing
when accessing memory. A simple performance improvement is to
prefetch the first cacheline of a string to be hashed. Ran 50 tests
on an i9-12900 building intel-ipsec-mb that heavily uses nasm and
improved wall clock build times from 56.1 seconds to 53.2 seconds or
around 5% speed improvement.
Signed-off-by: Colin Ian King <colin.i.king@intel.com>
SPDX is an international standard for documenting software license
requirements. Remove the existing headers and replace with a brief
SPDX preamble.
See: https://spdx.dev/use/specifications/
The script used to convert the files is added to "tools", and the
file header templates in headers/ are updated.
Signed-off-by: H. Peter Anvin (Intel) <hpa@zytor.com>
There is absolutely no reason not to include <string.h> globally, and
with the inline function for mempcpy() we need it there anyway.
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
Add binary key support to the hash table interface. Clean up the
interface to contain less extraneous crud.
Signed-off-by: H. Peter Anvin (Intel) <hpa@zytor.com>
Add hash_free_all() to factor common code of iterating over all
members of a hash to free them with a single nasm_free().
Split strtbl_find() into strtbl_find() and strtbl_add(). It is very
unlikely that the same call site will want to have both of these
functionalities, and in the end the code for the two functions are
surprisingly different.
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
Make the source code easier to understand and keep track of by
organizing it into subdirectories depending on the function.
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
