branches: 1.9.16;
It is just the __ffssi2 alias we do not want in rump kernel

Do not build arm toolchain symbols in the rump kernel

These symbols will be provided at link time and will be
duplicate symbols in rump kernel and libc if defined.

Many have been fixed previously, but these were missed
as did not have a test.

PR port-arm/48543: do provide __ffssi2 as strong alias (in case libgcc.a gets
not linked in) for now.
OK: skrll@

More (stylistic) whitespace.

Appease new gas

Add END() and clarify thumb/arm

Convert some more conditional instructions to unified syntax

branches: 1.2.2; 1.2.8;
Add a weak symbol definition for __ffssi2 so that __builtin_ffs will use
this if no strong defintion of __ffssi2 is available.

branches: 1.1.18;
Merge libkern + libc common files. As requested by core.

branches: 1.5.16;
Don't build the __eabi_ aliases in the arm rump kernel.

These are provided by libc in userspace, so leave out of kernel

Improve EABI handling of string functions. Most importantly, fix
__aeabi_memset, which has the arguments in the wrong order.

Add END()

Switch to unified syntax
use RET/RETc
use push/pop

branches: 1.1.18; 1.1.50; 1.1.56;
Merge libkern + libc common files. As requested by core.

branches: 1.8.16;
Add ARM EABI aliases for aligned arguments.

Don't build the __eabi_ aliases in the arm rump kernel.

These are provided by libc in userspace, so leave out of kernel

branches: 1.6.4;
Improve EABI handling of string functions. Most importantly, fix
__aeabi_memset, which has the arguments in the wrong order.

Unless we are using an XSCALE, default to the normal arm version of memcpy.

#include <arm/cdefs.h> to get _ARM_ARCH_DWORD_OK

Fix typo.

Change __XSCALE__ to _ARM_ARCH_DWORD_OK so that any cpu with dword load/store
can use it.

branches: 1.1.50; 1.1.54; 1.1.56;
Merge libkern + libc common files. As requested by core.

Fix two signed comparisons that were missed in the last patch.
Found be rillig@

Use unsigned comparisons for pointers and size_t values.

branches: 1.5.26; 1.5.40;
Improve EABI handling of string functions. Most importantly, fix
__aeabi_memset, which has the arguments in the wrong order.

Switch to unified syntax
use RET/RETc
use push/pop

Add aeabi strong aliases.

branches: 1.2.4; 1.2.24; 1.2.26;
Remove clause 3 and 4 from TNF licenses

branches: 1.1.18; 1.1.26;
Merge libkern + libc common files. As requested by core.

Fix various typos in comments.

branches: 1.2.6;
Use unsigned comparisons for pointers and size_t values.

branches: 1.1.2; 1.1.4; 1.1.8; 1.1.38; 1.1.52;
This is a working version of memcpy implemented using NEON instructions.
Still needs tuning as it is still about 15% than the non-NEON version.

Use unsigned comparisons for pointers and size_t values.

branches: 1.5.26; 1.5.40;
Write out register pairs for strd.

Add END(memcpy)

Switch to unified syntax
use RET/RETc
use push/pop

branches: 1.2.4; 1.2.34; 1.2.40;
Apply the patch, with some minor tweaks, supplied in PR/36513.
This prevents a possible prefetch past the end of the source buffer.

Note that the semantics of the pld instruction mean that it is unlikely
that this would have caused any problems except in very specific
circumstances in some types of device drivers.

branches: 1.1.6; 1.1.14;
Merge libkern + libc common files. As requested by core.

Use unsigned comparisons for pointers and size_t values.

branches: 1.10.12; 1.10.26;
Comment alignment. No functional change.

branches: 1.9.2; 1.9.4;
Don't build the __eabi_ aliases in the arm rump kernel.

These are provided by libc in userspace, so leave out of kernel

Improve EABI handling of string functions. Most importantly, fix
__aeabi_memset, which has the arguments in the wrong order.

Use PLT_SYM.

Add END()

Switch to unified syntax
use RET/RETc
use push/pop

Add aeabi strong aliases.

branches: 1.3.4; 1.3.24; 1.3.26;
Remove clause 3 and 4 from TNF licenses

branches: 1.2.4; 1.2.10;
Apply the patch supplied in PR/36512 to fix the buffer overlap check.

branches: 1.1.6; 1.1.14;
Merge libkern + libc common files. As requested by core.

Use unsigned comparisons for pointers and size_t values.

branches: 1.8.16; 1.8.30;
Don't build the __eabi_ aliases in the arm rump kernel.

These are provided by libc in userspace, so leave out of kernel

Improve EABI handling of string functions. Most importantly, fix
__aeabi_memset, which has the arguments in the wrong order.

Use explicit form of register pair operations by specifying both.

Add END()

Switch to unified syntax
use RET/RETc
use push/pop

Add aeabi strong aliases.

Change __XSCALE__ to _ARM_ARCH_DWORD_OK so that any cpu with strd can use it.

branches: 1.1.18; 1.1.50; 1.1.54; 1.1.56;
Merge libkern + libc common files. As requested by core.

branches: 1.2.2; 1.2.4; 1.2.8; 1.2.38;
Fix two typos

A version of memset that can do NEON, VFP as well as normal arm instructions

Use unsigned comparisons for pointers and size_t values.

branches: 1.1.2; 1.1.4; 1.1.8; 1.1.38; 1.1.52;
Add a simplier version of memset which is less than 1/2 the size of the
current one. On a Cortex-A9, this is about 15%-30% faster than the current
libc version. This is not a trivial implementation since that was an order
magnitude slower than the existing libc version.

branches: 1.1.2; 1.1.4; 1.1.8; 1.1.38;
Add a NEON(only) implementation of memset.
This is a work in progress.

branches: 1.1.2; 1.1.6; 1.1.14; 1.1.38;
Switch to using ARM assembly versions of strcat, strchr, strrchr.

branches: 1.6.24;
Make EHABI optional.

branches: 1.5.2;
Use __ARM_EABI__ and new __UNWIND_TABLES__ to decide when to use .cfi ops

Don't include .cfi info if _KERNEL || _STANDALONE

Add .cfi ops if EABI.
Thumbify.

branches: 1.2.2; 1.2.4; 1.2.8;
Add missing ! on str

Add a native version of strcat which uses the optimized strlen and strcpy
routines.

branches: 1.3.26;
cbnz/cbz can not branch backwards so nuke 'em.
Use the same register usage in strlen as in strnlen

Thumbify

branches: 1.1.2; 1.1.4; 1.1.8;
Add a simple version of strcat.

branches: 1.4.4; 1.4.28;
Use the arm versions of strlen/strchr/strrchr if compiling thumb2

For Thumb, use naive version

branches: 1.2.2; 1.2.6;
Add index/rindex strong aiases.

Switch to using ARM assembly versions of strcat, strchr, strrchr.

branches: 1.8.26;
Add two thumb2 bits.

Missing one teq -> cmp

Swap use of r1 and ip
teq -> cmp.
add s to few instructions
(thumbify part 1)

branches: 1.5.4;
Fix corner cases when searching for NUL.

branches: 1.4.2;
orrne wants 3 registers

Fix bug in detecting EOS/match on armv6+.

branches: 1.2.2;
Fix case when searching for NUL.

Add an ARM optimized version of strchr.

branches: 1.4.26;
cbnz/cbz can not branch backwards so nuke 'em.
Use the same register usage in strlen as in strnlen

Thumbify

ip -> r2
teq -> cmp

branches: 1.1.2; 1.1.4; 1.1.8;
Add simple/small versions of strchr/strrchr for ARM.

branches: 1.2.26;
Thumbify

branches: 1.1.18; 1.1.50; 1.1.56;
Merge libkern + libc common files. As requested by core.

branches: 1.5.26;
If compiling standalone with Thumb, use the thumb version instead of the
naive version.

branches: 1.4.2; 1.4.4; 1.4.8;
use #if defined(xxx) instead of ifdef

Depending on _STANDALONE include the "naive" version or the normal arm version.

Deal with _LIBC (aliases, etc).
Add missing #endif.

Add an assembly version of strcpy/strncpy/strlcpy.
(they all use a common source with defines to determine which to build).

fix misplaced or missing "e" in words with "ment" ending (argument, implement,
increment, decrement, alignment), in comments, documentation, log messages.

branches: 1.6.14;
fix rump

fix weak symbols. More work needs to be done for memcpy/strlen etc.

No need to include namespace.h; no other assembly code does.

branches: 1.3.8;
Switch to unified syntax
use RET/RETc
use push/pop

branches: 1.2.2; 1.2.4; 1.2.8;
Fix a typo in strlcpy which caused to not deal with NULs predecing the
string properly.

Rename strlen.S and strcpy.S to strlen_arm.S and strcpy_arm.S

branches: 1.8.14;
fix standalone

fix standalone

fix rump

No need to include namespace.h; no other assembly code does.

branches: 1.4.8;
write of final NUL in strlcpy doesn't need to be post-incremented

Convert some more conditional instructions to unified syntax

branches: 1.2.2; 1.2.4; 1.2.8;
Add weak alias for strlcpy

Add simple/small versions of the str* functions. Suitable for libsa, etc.

branches: 1.3.14;
fix weak symbols. More work needs to be done for memcpy/strlen etc.

No need to include namespace.h; no other assembly code does.

branches: 1.1.4; 1.1.8; 1.1.12;
Thumb versions of strcpy/strlcpy/strncpy

branches: 1.4.14;
fix weak symbols. More work needs to be done for memcpy/strlen etc.

No need to include namespace.h; no other assembly code does.

branches: 1.2.4; 1.2.10;
strlcat_arm.S is smaller than strlcat_naive.S so always use it.

branches: 1.1.2; 1.1.6;
Enable ARM assembly versions of strlcat and strnlen.

branches: 1.6.2; 1.6.26;
Make EHABI optional.

branches: 1.5.2;
Use __ARM_EABI__ and new __UNWIND_TABLES__ to decide when to use .cfi ops

Don't include .cfi info if _KERNEL || _STANDALONE

fix cfi_register -> cfi_offset

Add .cfi for __ARM_EABI__
Thumbify

branches: 1.1.2; 1.1.6;
Add ARM assembly of strlcat which is implemented using (the ARM optimized)
strnlen and strlcpy.

branches: 1.3.26;
Don't include .cfi info if _KERNEL || _STANDALONE

Convert some more conditional instructions to unified syntax

branches: 1.1.2; 1.1.4; 1.1.8;
Simple version of strlcat for ARM.

branches: 1.5.26;
If compiling standalone with Thumb, use the thumb version instead of the
naive version.

branches: 1.4.2; 1.4.4; 1.4.8;
Back out workaround.

Use the naive version of strlcpy until the longer one is fixed (it's still
faster than the C version).

use #if defined(xxx) instead of ifdef

Add an assembly version of strcpy/strncpy/strlcpy.
(they all use a common source with defines to determine which to build).

branches: 1.4.26;
Use the arm versions of strlen/strchr/strrchr if compiling thumb2

For Thumb, use naive version

branches: 1.2.2; 1.2.4; 1.2.8;
Depending on _STANDALONE include the "naive" version or the normal arm version.

Rename strlen_armv6.S to strlen.S since this is no longer armv6 dependent.

Fix strnlen with a large maxlen argument by using unsigned comparison
conditions - from mlelstv.

I had a similar, but not quite as good patch.

branches: 1.10.2;
Fix some comments

branches: 1.9.24; 1.9.26;
Make EHABI optional.

branches: 1.8.2;
Use __ARM_EABI__ and new __UNWIND_TABLES__ to decide when to use .cfi ops

Don't include .cfi info if _KERNEL || _STANDALONE

Add a missing it gt before movgt for thumb

thumbify (part2)

For EABI, add .cfi ops

branches: 1.3.2; 1.3.6;
Add support for strnlen.

branches: 1.2.2;
Use movw on armv7 to fill uppper halfword.

Rename strlen.S and strcpy.S to strlen_arm.S and strcpy_arm.S

Rename strlen_armv6.S to strlen.S since this is no longer armv6 dependent.

Make this work on all ARMs but keep the armv6 optimizations. It as fast as
the existing strlen for small string and once strings are 8 bytes or more in
length it starts getting significantly faster. For really long strings,
compared to the existing strlen, this uses about 1/2 of the cycles for the
non-armv6 version and about 1/3 of the cycles for the armv6 version.

A few slight speedups (remove one instruction from the main loop).

strlen implementation for armv6 and later. Uses clz and uqadd8 to really
speed the search for NUL. as fast as normal strlen at about a length of
6 or 7 and 2-3 times faster starting around 10.

improve a comment

branches: 1.8.26;
cbnz/cbz can not branch backwards so nuke 'em.
Use the same register usage in strlen as in strnlen

Thumbify

Use ip as a temporary

Change previous use of r2 to r3

teq -> cmp
ip -> r2
add/sub -> adds/subs
(thumbify part 1)

branches: 1.3.2; 1.3.6;
Add support for strnlen.

branches: 1.2.2;
Add missing quote - fix build

Add simple/small versions of the str* functions. Suitable for libsa, etc.

Use unsigned comparisons for pointers and size_t values.

branches: 1.3.2; 1.3.4; 1.3.8; 1.3.38; 1.3.52;
Debug. This becomes faster than the normal strlen at about 80 characters.

Slighly improved (can deal with all 16 bytes being non-NUL and quickly
proceed to next qword).

Add a NEON implementation of strlen.

branches: 1.2.26;
Thumbify

branches: 1.1.18; 1.1.50; 1.1.56;
Merge libkern + libc common files. As requested by core.

branches: 1.3.26;
If compiling standalone with Thumb, use the thumb version instead of the
naive version.

branches: 1.2.2; 1.2.4; 1.2.8;
use #if defined(xxx) instead of ifdef

Add an assembly version of strcpy/strncpy/strlcpy.
(they all use a common source with defines to determine which to build).

branches: 1.3.4; 1.3.28;
Use the arm versions of strnlen if compiling thumb2

For Thumb, use naive version

branches: 1.1.2; 1.1.6;
Enable ARM assembly versions of strlcat and strnlen.

branches: 1.4.4; 1.4.28;
Use the arm versions of strlen/strchr/strrchr if compiling thumb2

For Thumb, use naive version

branches: 1.2.2; 1.2.6;
Add index/rindex strong aiases.

Switch to using ARM assembly versions of strcat, strchr, strrchr.

branches: 1.6.26;
move a misplaced #endif

swap r1 & ip
use adds, eors, etc.
teq -> cmp

Switch to unified syntax
use RET/RETc
use push/pop

branches: 1.3.4;
Fix corner cases when searching for NUL.

branches: 1.2.2;
Deal with an end-of-string condition properly.

branches: 1.1.2;
Add ARM optimized version of strrchr.

branches: 1.4.26;
cbnz/cbz can not branch backwards so nuke 'em.
Use the same register usage in strlen as in strnlen

Thumbify

ip -> r2
teq -> cmp

branches: 1.1.2; 1.1.4; 1.1.8;
Add simple/small versions of strchr/strrchr for ARM.