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Author SHA1 Message Date
Sebastian Pop
9938a64ca9 aarch64: optimize the unaligned case of memcmp 
This brings to newlib a performance improvement that we developed in Bionic
libc.  That change has been submitted for review to Bionic libc:
https://android-review.googlesource.com/418279

A similar patch has been submitted for review in glibc:
https://sourceware.org/ml/libc-alpha/2017-06/msg01143.html

Patch written by Vikas Sinha and Sebastian Pop.

The performance was measured on the bionic-benchmarks on a hikey (aarch64 8xA53)
board. There was no performance change to the existing benchmark
and a performance improvement on the new benchmark for memcmp
on the unaligned side. The new benchmark has been submitted for
review at https://android-review.googlesource.com/414860

The overall performance improves by 18% for the small data set 8
and the performance improves by 450% for the large data set 64k.

The base is with the libc from /system/lib64. The bionic libc
with this patch is in /data.

hikey:/data # export LD_LIBRARY_PATH=/system/lib64
hikey:/data # ./bionic-benchmarks --benchmark_filter='BM_string_memcmp*'
Run on (8 X 2.4 MHz CPU s)
Benchmark                                Time           CPU Iterations
----------------------------------------------------------------------
BM_string_memcmp/8                      30 ns         30 ns   22955680    251.07MB/s
BM_string_memcmp/64                     57 ns         57 ns   12349184   1076.99MB/s
BM_string_memcmp/512                   305 ns        305 ns    2297163   1.56496GB/s
BM_string_memcmp/1024                  571 ns        571 ns    1225211   1.66912GB/s
BM_string_memcmp/8k                   4307 ns       4306 ns     162562   1.77177GB/s
BM_string_memcmp/16k                  8676 ns       8675 ns      80676   1.75887GB/s
BM_string_memcmp/32k                 19233 ns      19230 ns      36394   1.58695GB/s
BM_string_memcmp/64k                 36986 ns      36984 ns      18952   1.65029GB/s
BM_string_memcmp_aligned/8             199 ns        199 ns    3519166   38.3336MB/s
BM_string_memcmp_aligned/64            386 ns        386 ns    1810734   158.073MB/s
BM_string_memcmp_aligned/512          1735 ns       1734 ns     403981   281.525MB/s
BM_string_memcmp_aligned/1024         3200 ns       3200 ns     218838   305.151MB/s
BM_string_memcmp_aligned/8k          25084 ns      25080 ns      28180   311.507MB/s
BM_string_memcmp_aligned/16k         51730 ns      51729 ns      13521   302.057MB/s
BM_string_memcmp_aligned/32k        103228 ns     103228 ns       6782   302.727MB/s
BM_string_memcmp_aligned/64k        207117 ns     207087 ns       3450   301.806MB/s
BM_string_memcmp_unaligned/8           339 ns        339 ns    2070998   22.5302MB/s
BM_string_memcmp_unaligned/64         1392 ns       1392 ns     502796   43.8454MB/s
BM_string_memcmp_unaligned/512        9194 ns       9194 ns      76133   53.1104MB/s
BM_string_memcmp_unaligned/1024      18325 ns      18323 ns      38206   53.2963MB/s
BM_string_memcmp_unaligned/8k       148579 ns     148574 ns       4713   52.5831MB/s
BM_string_memcmp_unaligned/16k      298169 ns     298120 ns       2344   52.4118MB/s
BM_string_memcmp_unaligned/32k      598813 ns     598797 ns       1085    52.188MB/s
BM_string_memcmp_unaligned/64k     1196079 ns    1196083 ns        540   52.2539MB/s

hikey:/data # export LD_LIBRARY_PATH=/data
hikey:/data # ./bionic-benchmarks --benchmark_filter='BM_string_memcmp*'
Run on (8 X 2.4 MHz CPU s)
Benchmark                                Time           CPU Iterations
----------------------------------------------------------------------
BM_string_memcmp/8                      30 ns         30 ns   23209918   252.802MB/s
BM_string_memcmp/64                     57 ns         57 ns   12348447   1076.95MB/s
BM_string_memcmp/512                   305 ns        305 ns    2296878   1.56471GB/s
BM_string_memcmp/1024                  572 ns        571 ns    1224426    1.6689GB/s
BM_string_memcmp/8k                   4309 ns       4308 ns     162491   1.77109GB/s
BM_string_memcmp/16k                  9348 ns       9345 ns      74894   1.63285GB/s
BM_string_memcmp/32k                 18329 ns      18322 ns      38249    1.6656GB/s
BM_string_memcmp/64k                 36992 ns      36981 ns      18952   1.65045GB/s
BM_string_memcmp_aligned/8             199 ns        199 ns    3513925   38.3162MB/s
BM_string_memcmp_aligned/64            386 ns        386 ns    1814038   158.192MB/s
BM_string_memcmp_aligned/512          1735 ns       1735 ns     402279   281.502MB/s
BM_string_memcmp_aligned/1024         3204 ns       3202 ns     218761   304.941MB/s
BM_string_memcmp_aligned/8k          25577 ns      25569 ns      27406   305.548MB/s
BM_string_memcmp_aligned/16k         52143 ns      52123 ns      13522   299.769MB/s
BM_string_memcmp_aligned/32k        105169 ns     105127 ns       6637    297.26MB/s
BM_string_memcmp_aligned/64k        206508 ns     206383 ns       3417   302.835MB/s
BM_string_memcmp_unaligned/8           282 ns        282 ns    2482953    27.062MB/s
BM_string_memcmp_unaligned/64          542 ns        541 ns    1298317    112.77MB/s
BM_string_memcmp_unaligned/512        2152 ns       2152 ns     325267   226.915MB/s
BM_string_memcmp_unaligned/1024       4025 ns       4025 ns     173904   242.622MB/s
BM_string_memcmp_unaligned/8k        32276 ns      32271 ns      21818    242.09MB/s
BM_string_memcmp_unaligned/16k       65970 ns      65970 ns      10554   236.851MB/s
BM_string_memcmp_unaligned/32k      131241 ns     131242 ns       5129    238.11MB/s
BM_string_memcmp_unaligned/64k      266159 ns     266160 ns       2661   234.821MB/s
 2017-06-26 10:22:40 +02:00
Jeff Johnston
61f181d6b8 Bump release to 2.5.0 for yearly snapshot. 2016-12-22 21:33:54 -05:00
Wilco Dijkstra
e7b1ee2ea6 Add rawmemchr 
Marcus Shawcroft wrote:
> This patch appears to have been munged by the mail system, can you
> repost as an attachment please.

Sure, I've attached the patch.

Wilco

Add a simple rawmemchr implementation. Use strlen for rawmemchr(s, '\0') as it is the
fastest way to search for '\0', and use memchr with an infinite size for other cases.
This is 3x faster for large sizes.

ChangeLog:
2016-04-22  Wilco Dijkstra  <wdijkstr@arm.com>

        * newlib/libc/machine/aarch64/Makefile.in: Add rawmemchr.S and
        rawmemchr-stub.c.
        * newlib/libc/machine/aarch64/Makefile.am: Likewise.
        * newlib/libc/machine/aarch64/rawmemchr.S (rawmemchr): Add rawmemchr.
        * newlib/libc/machine/aarch64/rawmemchr-stub.c (rawmemchr): Likewise.
 2016-05-20 10:47:02 +02:00
Sebastian Huber
8a5af1a184 Use __machine_*_t_defined for internal types 
Newlib defines defaults for internal types via <sys/_types.h> and uses
<machine/_types.h> to let targets define their own type if necessary.

Previously for example

	#ifndef __dev_t_defined
	typedef short __dev_t;
	#endif

However, the __*_t_defined pattern conflicts with the glibc type guard
pattern for user types, e.g. dev_t in this example.  Introduce a
__machine_*_t_defined pattern for internal types (defined by
<machine/_types.h>, used by <sys/_types.h>).  For example

	#ifndef __machine_dev_t_defined
	typedef short __dev_t;
	#endif

Signed-off-by: Sebastian Huber <sebastian.huber@embedded-brains.de>
 2016-04-15 14:51:39 +02:00
Jeff Johnston
fbc4a0827b Bump up newlib version to 2.4.0 due to feature test refactoring 2016-03-29 17:33:42 -04:00
Jeff Johnston
ad7b3cde9c Regenerate files for newlib 2.3.0. 2015-12-21 21:32:11 -05:00
Wilco Dijkstra
3c8636acf6 AArch64: Tune memcpy 
* newlib/libc/machine/aarch64/memcpy.S (memcpy):
 	Further tuning for performance.
 2015-11-12 13:38:39 +01:00
Wilco Dijkstra
127c38bd44 [AArch64] Rewrite optimized memset. 
This is an optimized memset for AArch64.  Memset is split into 4 main
cases: small sets of up to 16 bytes, medium of 16..96 bytes which are
fully unrolled.  Large memsets of more than 96 bytes align the
destination and use an unrolled loop processing 64 bytes per
iteration.  Memsets of zero of more than 256 use the dc zva
instruction, and there are faster versions for the common ZVA sizes 64
or 128.  STP of Q registers is used to reduce codesize without loss of
performance.
 2015-07-30 12:51:34 +01:00
Marcus Shawcroft
c7806ef76a [AArch64] Reverting recent optimized memset(). 2015-07-15 13:34:58 +01:00
Wilco Dijkstra
3263f90ef7 [AArch64] Optimized memset. 
This is an optimized memset for AArch64.  Memset is split into 4 main
cases: small sets of up to 16 bytes, medium of 16..96 bytes which are
fully unrolled.  Large memsets of more than 96 bytes align the
destination and use an unrolled loop processing 64 bytes per
iteration.  Memsets of zero of more than 256 use the dc zva
instruction, and there are faster versions for the common ZVA sizes 64
or 128.  STP of Q registers is used to reduce codesize without loss of
performance.
 2015-07-13 13:17:16 +01:00
Wilco Dijkstra
b295f6ba44 [AArch64] Optimized memcpy. 
This is an optimized memcpy for AArch64.  Copies are split into 3 main
cases: small copies of up to 16 bytes, medium copies of 17..96 bytes
which are fully unrolled.  Large copies of more than 96 bytes align
the destination and use an unrolled loop processing 64 bytes per
iteration.  In order to share code with memmove, small and medium
copies read all data before writing, allowing any kind of overlap.  On
a random copy test memcpy is 40.8% faster on A57 and 28.4% on A53.
 2015-07-13 13:09:02 +01:00
Wilco Dijkstra
9503c7f275 [AArch64] Optimized memmove. 
This is an optimized memmove for AArch64.  All copies of up to 96
bytes and all backward copies are done by the new memcpy.  The only
remaining case is large forward copies which are done in the same way
as the memcpy loop, but copying from the end rather than the start.
 2015-07-13 13:03:02 +01:00
Corinna Vinschen
086cd00d24 * libc/machine/aarch64/strlen.S (strlen): Improve performance. 2015-01-20 10:11:56 +00:00
Richard Earnshaw
6a35dbf342 * libc/machine/aarch64/strcpy.S (strcpy): Further performance 
improvements.  Adjust to allow building as stpcpy.
	* libc/machine/aarch64/stpcpy.S: New file.
	* libc/machine/aarch64/stpcpy-stub.c: New file.
	* libc/machine/aarch64/Makefile.am (lib_a_SOURCES): Build stpcpy.
	* libc/machine/aarch64/Makefile.in: Regenerated.
 2015-01-06 09:57:55 +00:00
Jeff Johnston
0615b4bb5f 2014-12-18 Jeff Johnston <jjohnstn@redhat.com> 
* NEWS: Update with 2.2.0 info.
        * README: Ditto.
        * acinclude.m4: Change version number to 2.2.0.
        * libc/libc.texinfo: Ditto.
        * libm/libm.texinfo: Ditto.
        * configure: Regenerated.
        * Makefile.in: Regenerated.
        * doc/configure: Ditto.
        * libc/*/configure: Ditto.
        * libm/*/configure: Ditto.
        * libc/sys/linux/shared.ld: Add VERS_2.2
 2014-12-18 20:30:11 +00:00
Richard Earnshaw
52edca9f86 * libc/machine/aarch64/strcpy.S: Improve handling of short strings. 2014-12-16 15:48:58 +00:00
Richard Earnshaw
8608e14a3b * libc/machine/aarch64/strchrnul.S (vrepmask): Use a call-clobbered 
register.
 2014-12-10 09:35:10 +00:00
Richard Earnshaw
c53c2915a7 * libc/machine/aarch64/strrchr.S: New file. 
* libc/machine/aarch64/strrchr-stub.c: New file.
	* libc/machine/aarch64/Makefile.am: Add them to build list.
	* libc/machine/aarch64/Makefile.in: Regenerated.
 2014-12-08 15:21:42 +00:00
Richard Earnshaw
fbb8f1a2c7 * libc/machine/aarch64/strcpy.S: New file. 
* libc/machine/aarch64/strcpy-stub.S: New file.
	* libc/machine/aarch64/Makefile.am (lib_a_SOURCES): Add new files.
	* libc/machine/aarch64/Makefile.in: Regenerate.
 2014-11-10 14:57:37 +00:00
Richard Earnshaw
59c3d5a1a4 * libc/machine/aarch64/memchr.S: Add check for zero-sized buffer. 2014-08-19 10:44:44 +00:00
Richard Earnshaw
87375c75b3 [aarch64] Add memchr. 
2014-07-11  K�vin Petit  <kevin.petit@arm.com>

	* libc/machine/aarch64/memchr.S: New file.
	* libc/machine/aarch64/memchr-stub.c: New file.
	* libc/machine/aarch64/Makefile.am: Add the new files.
	* libc/machine/aarch64/Makefile.in: Regenerated.
 2014-07-11 09:10:50 +00:00
Richard Earnshaw
deda48a9fb * libc/machine/aarch64/strchrnul.S: New file. 
* libc/machine/aarch64/strchrnul-stub.c: New file.
	* libc/machine/aarch64/Makefile.am: Add them to build list.
	* libc/machine/aarch64/Makefile.in: Regenerated.
 2014-06-11 10:42:54 +00:00
Richard Earnshaw
5efd066df2 * libc/machine/aarch64/strchr.S: New file 
* libc/machine/aarch64/strchr-stub.c: New file
	* libc/machine/aarch64/Makefile.am: Add them to build list.
	* libc/machine/aarch64/Makefile.in: Regenerated.
 2014-06-10 14:04:31 +00:00
Jeff Johnston
5ac847c629 2013-12-23 Jeff Johnston <jjohnstn@redhat.com> 
* NEWS: Update with 2.1.0 info.
        * README: Ditto.
        * acinclude.m4: Change version number to 2.1.0.
        * aclocal.m4: Regenerated.
        * configure: Ditto.
        * Makefile.in: Regenerated.
        * doc/aclocal.m4: Ditto.
        * doc/configure: Ditto.
        * libc/*/aclocal.m4: Ditto.
        * libc/*/configure: Ditto.
        * libc/libc.texinfo: Ditto.
        * libm/*/aclocal.m4: Ditto.
        * libm/*/configure: Ditto.
        * libm/libm.texinfo: Ditto.
        * libc/sys/linux/shared.ld: Add VERS_2.1
 2013-12-23 20:45:10 +00:00
Marcus Shawcroft
450fe1bfa3 2013-01-17 Marcus Shawcroft <marcus.shawcroft@linaro.org> 
* libc/machine/aarch64/strncmp.S: Correct arithmetic for
	    argument N values close to the maximum representable
	    value in an unsigned 64 bit value.
 2013-01-17 14:53:32 +00:00
Marcus Shawcroft
78f66de6ce 2013-01-17 Marcus Shawcroft <marcus.shawcroft@linaro.org> 
* libc/machine/aarch64/strnlen.S: Correct arithmetic for
	argument N values close to the maximum representable
	value in an unsigned 64 bit value.
 2013-01-17 14:52:37 +00:00
Marcus Shawcroft
211f1ec717 2013-01-10 Marcus Shawcroft <marcus.shawcroft@linaro.org> 
* libc/machine/aarch64/Makefile.am (lib_a_SOURCES): Add
        memcmp-stub.c and memcmp.S
        * libc/machine/aarch64/Makefile.in: Regenerated.
        * libc/machine/aarch64/memcmp-stub.c: New file.
        * libc/machine/aarch64/memcmp.S: New file.
 2013-01-10 13:02:19 +00:00
Marcus Shawcroft
ba8f05bcf5 2013-01-10 Marcus Shawcroft <marcus.shawcroft@linaro.org> 
* libc/machine/aarch64/Makefile.am (lib_a_SOURCES): Add
        strnlen-stub.c and strnlen.S
        * libc/machine/aarch64/Makefile.in: Regenerated.
        * libc/machine/aarch64/strnlen-stub.c: New file.
        * libc/machine/aarch64/strnlen.S: New file.
 2013-01-10 13:00:40 +00:00
Marcus Shawcroft
82c3d37d07 2013-01-10 Marcus Shawcroft <marcus.shawcroft@linaro.org> 
* libc/machine/aarch64/Makefile.am (lib_a_SOURCES):
        Add strlen.S and strlen-stub.c.
        * libc/machine/aarch64/Makefile.in: Regenerated.
        * libc/machine/aarch64/strlen-stub.c: New file.
        * libc/machine/aarch64/strlen.S: New file.
 2013-01-10 12:57:11 +00:00
Marcus Shawcroft
a8907bda23 2013-01-10 Marcus Shawcroft <marcus.shawcroft@linaro.org> 
* libc/machine/aarch64/Makefile.am (lib_a_SOURCES):
	Add memmove.S and memmove-stub.c.
	* libc/machine/aarch64/Makefile.in: Regenerated.
	* libc/machine/aarch64/memmove-stub.c: New file.
	* libc/machine/aarch64/memmove.S: New file.
 2013-01-10 12:54:39 +00:00
Marcus Shawcroft
2edd103558 2013-01-10 Marcus Shawcroft <marcus.shawcroft@linaro.org> 
* libc/machine/aarch64/Makefile.am (lib_a_SOURCES): Re-ordered.
	Add strncmp.S and strncmp-stub.c.
	* libc/machine/aarch64/Makefile.in: Regenerated.
	* libc/machine/aarch64/strncmp-stub.c: New file.
	* libc/machine/aarch64/strncmp.S: New file.
 2013-01-10 12:51:13 +00:00
Marcus Shawcroft
080e96f57c 2013-01-10 Marcus Shawcroft <marcus.shawcroft@linaro.org> 
* libc/machine/aarch64/Makefile.am (lib_a_SOURCES): Add
	    memcpy.c memcpy-stub.c memset.S memset-stub.c strcmp.S
	    strcmp-stub.c.
	    * libc/machine/aarch64/Makefile.in: Regenerated.
	    * libc/machine/aarch64/memcpy-stub.c: New file.
	    * libc/machine/aarch64/memcpy.S: New file.
	    * libc/machine/aarch64/memset-stub.c: New file.
	    * libc/machine/aarch64/memset.S: New file.
	    * libc/machine/aarch64/strcmp.S: New file.
	    * libc/machine/aarch64/strcmp-stub.c: New file.
 2013-01-10 12:44:50 +00:00
Jeff Johnston
f2d223bd0f 2012-12-20 Jeff Johnston <jjohnstn@redhat.com> 
* NEWS: Update with 2.0.0 info.
        * README: Ditto.
        * acinclude.m4: Change version number to 2.0.0.
        * aclocal.m4: Regenerated.
        * configure: Ditto.
        * Makefile.in: Regenerated.
        * doc/aclocal.m4: Ditto.
        * doc/configure: Ditto.
        * libc/*/aclocal.m4: Ditto.
        * libc/*/configure: Ditto.
        * libc/libc.texinfo: Ditto.
        * libm/*/aclocal.m4: Ditto.
        * libm/*/configure: Ditto.
        * libm/libm.texinfo: Ditto.
        * libc/sys/linux/shared.ld: Add VERS_2.0
 2012-12-20 21:10:27 +00:00
Jeff Johnston
d7281d547f 2012-12-14 Yufeng Zhang <yufeng.zhang@arm.com> 
* libc/machine/aarch64/machine/_types.h: New file; define _ssize_t
        as long.
 2012-12-14 20:45:51 +00:00
Jeff Johnston
c3fe5bf771 2012-09-26 Ian Bolton <ian.bolton@arm.com> 
Jim MacArthur  <jim.macarthur@arm.com>
        Marcus Shawcroft  <marcus.shawcroft@arm.com>
        Nigel Stephens  <nigel.stephens@arm.com>
        Ramana Radhakrishnan  <ramana.radhakrishnan@arm.com>
        Richard Earnshaw  <rearnsha@arm.com>
        Sofiane Naci  <sofiane.naci@arm.com>
        Tejas Belagod  <tejas.belagod@arm.com>
        Yufeng Zhang  <yufeng.zhang@arm.com>

        * configure.host: Add AArch64.
        * libc/include/machine/ieeefp.h: Add AArch64.
        * libc/include/machine/setjmp.h: Add AArch64.
        * libc/include/machine/time.h: Add AArch64.
        * libc/include/sys/config.h: Add AArch64.
        * libc/machine/aarch64/Makefile.am: New file.
        * libc/machine/aarch64/Makefile.in: Generated.
        * libc/machine/aarch64/aclocal.m4: Generated.
        * libc/machine/aarch64/configure: Generated.
        * libc/machine/aarch64/configure.in: New file.
        * libc/machine/aarch64/setjmp.S: New file.
        * libc/machine/configure.in: Add AArch64.
        * libc/machine/configure: Re-generated.
        * libm/machine/aarch64/Makefile.am: New file.
        * libm/machine/aarch64/Makefile.in: Generated.
        * libm/machine/aarch64/aclocal.m4: Generated.
        * libm/machine/aarch64/configure: Generated.
        * libm/machine/aarch64/configure.in: New file.
        * libm/machine/aarch64/s_ceil.c: New file.
        * libm/machine/aarch64/s_floor.c: New file.
        * libm/machine/aarch64/s_fma.c: New file.
        * libm/machine/aarch64/s_fmax.c: New file.
        * libm/machine/aarch64/s_fmin.c: New file.
        * libm/machine/aarch64/s_llrint.c: New file.
        * libm/machine/aarch64/s_llround.c: New file.
        * libm/machine/aarch64/s_lrint.c: New file.
        * libm/machine/aarch64/s_lround.c: New file.
        * libm/machine/aarch64/s_nearbyint.c: New file.
        * libm/machine/aarch64/s_rint.c: New file.
        * libm/machine/aarch64/s_round.c: New file.
        * libm/machine/aarch64/s_trunc.c: New file.
        * libm/machine/aarch64/sf_ceil.c: New file.
        * libm/machine/aarch64/sf_floor.c: New file.
        * libm/machine/aarch64/sf_fma.c: New file.
        * libm/machine/aarch64/sf_fmax.c: New file.
        * libm/machine/aarch64/sf_fmin.c: New file.
        * libm/machine/aarch64/sf_llrint.c: New file.
        * libm/machine/aarch64/sf_llround.c: New file.
        * libm/machine/aarch64/sf_lrint.c: New file.
        * libm/machine/aarch64/sf_lround.c: New file.
        * libm/machine/aarch64/sf_nearbyint.c: New file.
        * libm/machine/aarch64/sf_rint.c: New file.
        * libm/machine/aarch64/sf_round.c: New file.
        * libm/machine/aarch64/sf_trunc.c: New file.
        * libm/machine/configure.in: Add AArch64.
        * libm/machine/configure: Re-generated.
 2012-09-26 20:06:50 +00:00