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>
The actual pointer value in offsetin() cancels out, but clang still
miscompiles offsetin() for an uninitialized pointer, considering the
value to be completely undefined. Initialize pointer being passed to
offsetin() to make clang happy; both the gcc and clang optimizers
discover later in the code that the initialization is unused and
removes it from the code.
Although technically undefined behavior, this is in my opinion a
severe quality of implementation bug in clang, and I will file a bug
report accordingly.
Reported-by: Jasper Lievisse Adriaanse <r+nasm@jasper.la>
Reported-by: David Bohman <debohman@gmail.com>
Signed-off-by: H. Peter Anvin (Intel) <hpa@zytor.com>
The single-line macro argument parsing was completely broken as a
comma would not be recognized as an argument separator.
In the process of fixing this, make a fair bit of code cleanups.
Note: reverse tokens for smacro->expansion doesn't actually make any
sense anymore, might reconsider that.
This checkin also removes the distinction between "magic" and plain
smacros; the only difference is which specific expand method is being
invoked.
Finally, extend the allocating-string functions such that *all* the
allocating string functions support querying the length of the string
a posteori.
Signed-off-by: H. Peter Anvin (Intel) <hpa@zytor.com>
New macro which defines the offset on an object rather than a
type. This macro, as far as I know, ought to be fully portable, unlike
the fallback version of offsetof().
Signed-off-by: H. Peter Anvin (Intel) <hpa@zytor.com>
Make strlist_free() take a pointer to a pointer, so we can set it to
NULL.
Buffer warnings on a strlist until we either get an error or we are in
pass 2. Hopefully this should let us get rid of a lot of the ERR_PASS*
bullshit, which far too often causes messages to get lost.
asm/labels.c contains one example of a warning that cannot be made
correct with a specific pass number.
Signed-off-by: H. Peter Anvin (Intel) <hpa@zytor.com>
Make it a selectable option at allocation time if a strlist should
contain only unique strings or not. If not, we omit the hash table and
strlist_find() will not do anything.
Add printf()-style functions to a strlist.
Signed-off-by: H. Peter Anvin (Intel) <hpa@zytor.com>
The currently-unused strtbl was basically a slightly different version
of strlist, with the find and linearize capabilities. Merge these two
together by augmenting strlist to have the same capabilities.
Signed-off-by: H. Peter Anvin (Intel) <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>
Use a hash table to enforce uniqueness in a string list. It is still
an ordered list, however, and can be walked in insertion order.
Signed-off-by: H. Peter Anvin (Intel) <hpa@zytor.com>
