| #
d1f8f830 |
|
29-Oct-2018 |
Augustin Cavalier <waddlesplash@gmail.com> |
kernel: Tolerate "count" argument to memcpy being 0.
It seems GCC2 occasionally will inline a call to memcpy with
a count of 0, which this function did not previously expect
and would result in a "Divide Error Exception."
Hopefully fixes #14613.
|
| #
6156a508 |
|
06-Sep-2014 |
Paweł Dziepak <pdziepak@quarnos.org> |
kernel/x86[_64]: remove get_optimized_functions from cpu modules
The possibility to specify custom memcpy and memset implementations
in cpu modules is currently unused and there is generally no point
in such feature.
There are only 2 x86 vendors that really matter and there isn't
very big difference in performance of the generic optmized versions
of these funcions across different models. Even if we wanted different
versions of memset and memcpy depending on the processor model or
features much better solution would be to use STT_GNU_IFUNC and save
one indirect call.
Long story short, we don't really benefit in any way from
get_optimized_functions and the feature it implements and it only adds
unnecessary complexity to the code.
Signed-off-by: Paweł Dziepak <pdziepak@quarnos.org>
|
| #
1b3b00c2 |
|
10-Oct-2008 |
Ingo Weinhold <ingo_weinhold@gmx.de> |
memset() returned the wrong value. Fascinatingly there's even software
(APR) that uses it.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@27960 a95241bf-73f2-0310-859d-f6bbb57e9c96
|
| #
78594e1f |
|
10-Oct-2008 |
Ingo Weinhold <ingo_weinhold@gmx.de> |
Save one byte of code.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@27959 a95241bf-73f2-0310-859d-f6bbb57e9c96
|
| #
b18c9b97 |
|
10-Oct-2008 |
Ingo Weinhold <ingo_weinhold@gmx.de> |
* Implemented x86 assembly version of memset().
* memset() is now available through the commpage.
* CPU modules can provide a model-optimized memset().
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@27952 a95241bf-73f2-0310-859d-f6bbb57e9c96
|
| #
379ad6d0 |
|
09-Oct-2008 |
Ingo Weinhold <ingo_weinhold@gmx.de> |
* Moved the arch specific stuff in src/system/kernel/lib into arch/...
subdirectories. Also moved the x86 kernel arch_string.S there.
* Moved memcpy.c from src/system/libroot/posix/string into the
arch/generic subdirectory.
* Dealt with the consequences of moving things around. Affected are also
the boot loader and runtime loader builds.
Adjust the m68k and ppc parts, too, but only the x86 build is tested.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@27947 a95241bf-73f2-0310-859d-f6bbb57e9c96
|
| #
6156a508adb812153113f01aa1e547fff1e41bdb |
|
06-Sep-2014 |
Paweł Dziepak <pdziepak@quarnos.org> |
kernel/x86[_64]: remove get_optimized_functions from cpu modules
The possibility to specify custom memcpy and memset implementations
in cpu modules is currently unused and there is generally no point
in such feature.
There are only 2 x86 vendors that really matter and there isn't
very big difference in performance of the generic optmized versions
of these funcions across different models. Even if we wanted different
versions of memset and memcpy depending on the processor model or
features much better solution would be to use STT_GNU_IFUNC and save
one indirect call.
Long story short, we don't really benefit in any way from
get_optimized_functions and the feature it implements and it only adds
unnecessary complexity to the code.
Signed-off-by: Paweł Dziepak <pdziepak@quarnos.org>
|
| #
1b3b00c2a1d930fac55e2fd60297e755306c7aaf |
|
10-Oct-2008 |
Ingo Weinhold <ingo_weinhold@gmx.de> |
memset() returned the wrong value. Fascinatingly there's even software
(APR) that uses it.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@27960 a95241bf-73f2-0310-859d-f6bbb57e9c96
|
| #
78594e1f210cb58d756e034727a29bffcc4d287d |
|
10-Oct-2008 |
Ingo Weinhold <ingo_weinhold@gmx.de> |
Save one byte of code.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@27959 a95241bf-73f2-0310-859d-f6bbb57e9c96
|
| #
b18c9b97aeb4a7af1c5bca0bc99f02ad19e716f4 |
|
10-Oct-2008 |
Ingo Weinhold <ingo_weinhold@gmx.de> |
* Implemented x86 assembly version of memset().
* memset() is now available through the commpage.
* CPU modules can provide a model-optimized memset().
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@27952 a95241bf-73f2-0310-859d-f6bbb57e9c96
|
| #
379ad6d0372d6b3242b4a56925f5b8512d63500f |
|
09-Oct-2008 |
Ingo Weinhold <ingo_weinhold@gmx.de> |
* Moved the arch specific stuff in src/system/kernel/lib into arch/...
subdirectories. Also moved the x86 kernel arch_string.S there.
* Moved memcpy.c from src/system/libroot/posix/string into the
arch/generic subdirectory.
* Dealt with the consequences of moving things around. Affected are also
the boot loader and runtime loader builds.
Adjust the m68k and ppc parts, too, but only the x86 build is tested.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@27947 a95241bf-73f2-0310-859d-f6bbb57e9c96
|