| 32d1f188 | 03-Feb-2026 |
Andrew Turner <andrew@FreeBSD.org> |
libc/aarch64: Add memset for a 64 byte dc zva
On arm64 we can use the "dc zva" instruction to zero memory. The CPU
tells software if the instruction is implemented, and if so the size
and alignment
libc/aarch64: Add memset for a 64 byte dc zva
On arm64 we can use the "dc zva" instruction to zero memory. The CPU
tells software if the instruction is implemented, and if so the size
and alignment it will use.
When the size is 64-bytes the Arm Optimized Routines implementation of
memset can use dc zva to zero memory, and has a build flag to skip
checking.
Use this flag to build a version of memset that will be used when this
assumption is true.
Sponsored by: Arm Ltd
Differential Revision: https://reviews.freebsd.org/D54776
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| 3f224333 | 09-Dec-2024 |
Robert Clausecker <fuz@FreeBSD.org> |
lib/libc/aarch64/string: add timingsafe_memcmp() assembly implementation
A port of the amd64 implementation with some slight changes due to
differences in instructions provided by aarch64.
No ASIMD
lib/libc/aarch64/string: add timingsafe_memcmp() assembly implementation
A port of the amd64 implementation with some slight changes due to
differences in instructions provided by aarch64.
No ASIMD for the same reason as the amd64 code: it's just not particularly
suitable for this application.
Event: EuroBSDcon 2024
Approved by: security (cperciva)
Reviewed by: getz, cperciva
Differential Revision: https://reviews.freebsd.org/D46758
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| f2c98669 | 09-Dec-2024 |
Robert Clausecker <fuz@FreeBSD.org> |
lib/libc/aarch64/string: add ASIMD-enhanced timingsafe_bcmp implementation
A straightforward port of the amd64 implementation.
Approved by: security (cperciva)
Reviewed by: getz, cperciva
Event: E
lib/libc/aarch64/string: add ASIMD-enhanced timingsafe_bcmp implementation
A straightforward port of the amd64 implementation.
Approved by: security (cperciva)
Reviewed by: getz, cperciva
Event: EuroBSDcon 2024
Differential Revision: https://reviews.freebsd.org/D46757
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| 79e01e7e | 28-Aug-2024 |
Getz Mikalsen <getz@FreeBSD.org> |
lib/libc/aarch64/string: add bcopy & bzero wrapper
This patch enabled usage of SIMD enhanced functions to implement
bcopy and bzero.
Tested by: fuz (exprun)
Reviewed by: fuz, emaste
Sponsored by: G
lib/libc/aarch64/string: add bcopy & bzero wrapper
This patch enabled usage of SIMD enhanced functions to implement
bcopy and bzero.
Tested by: fuz (exprun)
Reviewed by: fuz, emaste
Sponsored by: Google LLC (GSoC 2024)
PR: 281175
Differential Revision: https://reviews.freebsd.org/D46459
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| 3863fec1 | 26-Aug-2024 |
Getz Mikalsen <getz@FreeBSD.org> |
lib/libc/aarch64/string: add strlen SIMD implementation
Adds a SIMD enhanced strlen for Aarch64. It takes inspiration from
the amd64 implementation but I struggled getting the performance I
had hope
lib/libc/aarch64/string: add strlen SIMD implementation
Adds a SIMD enhanced strlen for Aarch64. It takes inspiration from
the amd64 implementation but I struggled getting the performance I
had hoped for on cores like the Graviton3 when compared to the
existing implementation from Arm Optimized Routines.
See the DR for bechmark results.
Tested by: fuz (exprun)
Reviewed by: fuz, emaste
Sponsored by: Google LLC (GSoC 2024)
PR: 281175
Differential Revision: https://reviews.freebsd.org/D45623
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| 5ebd4d0d | 26-Aug-2024 |
Getz Mikalsen <getz@FreeBSD.org> |
lib/libc/aarch64/string: add memcpy SIMD implementation
I noticed that we have a SIMD optimized memcpy in the
arm-optimized-routines in /contrib.
This patch ensures we use the SIMD variant as oppos
lib/libc/aarch64/string: add memcpy SIMD implementation
I noticed that we have a SIMD optimized memcpy in the
arm-optimized-routines in /contrib.
This patch ensures we use the SIMD variant as opposed to the Scalar
optimized variant.
Benchmarks are generated by fuz' strperf utility.
See the DR for benchmark results.
Tested by: fuz (exprun)
Reviewed by: fuz, emaste
Sponsored by: Google LLC (GSoC 2024)
PR: 281175
Differential Revision: https://reviews.freebsd.org/D46251
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| bea89d03 | 26-Aug-2024 |
Getz Mikalsen <getz@FreeBSD.org> |
lib/libc/aarch64/string: add strlcat SIMD implementation
This patch requires D46243 as it depends on strlcpy being labeled
__strlcpy.
It's a direct copy from the amd64 string functions using memchr
lib/libc/aarch64/string: add strlcat SIMD implementation
This patch requires D46243 as it depends on strlcpy being labeled
__strlcpy.
It's a direct copy from the amd64 string functions using memchr and
strlcpy to implement strlcat.
Tested by: fuz (exprun)
Reviewed by: fuz, emaste
Sponsored by: Google LLC (GSoC 2024)
PR: 281175
Differential Revision: https://reviews.freebsd.org/D46272
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| 3dc54291 | 26-Aug-2024 |
Getz Mikalsen <getz@FreeBSD.org> |
lib/libc/aarch64/string: add strncat SIMD implementation
This patch requires D46170 as it depends on strlcpy being labeled
__memccpy.
It's a direct copy from the amd64 string functions.
Tested by:
lib/libc/aarch64/string: add strncat SIMD implementation
This patch requires D46170 as it depends on strlcpy being labeled
__memccpy.
It's a direct copy from the amd64 string functions.
Tested by: fuz (exprun)
Reviewed by: fuz, emaste
Sponsored by: Google LLC (GSoC 2024)
PR: 281175
Differential Revision: https://reviews.freebsd.org/D46292
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| bad17991 | 26-Aug-2024 |
Getz Mikalsen <getz@FreeBSD.org> |
lib/libc/aarch64/string: add memccpy SIMD implementation
This changeset includes a port of the SIMD implementation of
memccpy for amd64 to Aarch64.
Performance is significantly better than the scal
lib/libc/aarch64/string: add memccpy SIMD implementation
This changeset includes a port of the SIMD implementation of
memccpy for amd64 to Aarch64.
Performance is significantly better than the scalar implementation
except for short strings.
Benchmark results are as usual generated by the strperf utility
written by fuz.
See the DR for benchmark results.
Tested by: fuz (exprun)
Reviewed by: fuz, emaste
Sponsored by: Google LLC (GSoC 2024)
PR: 281175
Differential Revision: https://reviews.freebsd.org/D46170
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| 25c485e1 | 26-Aug-2024 |
Getz Mikalsen <getz@FreeBSD.org> |
lib/libc/aarch64/string: add strncmp SIMD implementation
This changeset includes a port of the SIMD implementation of
strncmp for amd64 to Aarch64.
It is based on D45839 with added handling for the
lib/libc/aarch64/string: add strncmp SIMD implementation
This changeset includes a port of the SIMD implementation of
strncmp for amd64 to Aarch64.
It is based on D45839 with added handling for the limit.
An extended unit test for strncmp is currently being written to
make sure the bounds checks for page crossings work as expected.
Performance is significantly better than the existing
implementation from the Arm Optimized Routines repository.
Benchmark results are generated by the strperf utility by fuz.
See the DR for benchmark results.
Tested by: fuz (exprun)
Reviewed by: fuz, emaste
Sponsored by: Google LLC (GSoC 2024)
PR: 281175
Differential Revision: https://reviews.freebsd.org/D45943
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| 756b7fc8 | 26-Aug-2024 |
Getz Mikalsen <getz@FreeBSD.org> |
lib/libc/aarch64/string: add strlcpy SIMD implementation
This changeset includes a port of the SIMD implementation of
strlcpy for amd64 to Aarch64.
It is based on memccpy (D46170) with some minor d
lib/libc/aarch64/string: add strlcpy SIMD implementation
This changeset includes a port of the SIMD implementation of
strlcpy for amd64 to Aarch64.
It is based on memccpy (D46170) with some minor differences.
Performance is significantly better than the scalar implementation.
Benchmark results are as usual generated by the strperf utility
written by fuz.
See the DR for benchmark results.
Tested by: fuz (exprun)
Reviewed by: fuz, emaste
Sponsored by: Google LLC (GSoC 2024)
PR: 281175
Differential Revision: https://reviews.freebsd.org/D46243
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| 79287d78 | 26-Aug-2024 |
Getz Mikalsen <getz@FreeBSD.org> |
lib/libc/aarch64/string: strcat enable use of SIMD
Call into SIMD strlen and stpcpy for an optimized strcat. Port of
D42600 for amd64.
Tested by: fuz (exprun)
Reviewed by: fuz, emaste
Sponsored by:
lib/libc/aarch64/string: strcat enable use of SIMD
Call into SIMD strlen and stpcpy for an optimized strcat. Port of
D42600 for amd64.
Tested by: fuz (exprun)
Reviewed by: fuz, emaste
Sponsored by: Google LLC (GSoC 2024)
PR: 281175
Differential Revision: https://reviews.freebsd.org/D46417
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| 89b38723 | 26-Aug-2024 |
Getz Mikalsen <getz@FreeBSD.org> |
lib/libc/aarch64/string: add optimized strpbrk & strsep implementations
These are direct copies from the amd64 string functions using the
optimized strcspn from D46398
Tested by: fuz (exprun)
Revie
lib/libc/aarch64/string: add optimized strpbrk & strsep implementations
These are direct copies from the amd64 string functions using the
optimized strcspn from D46398
Tested by: fuz (exprun)
Reviewed by: fuz, emaste
Sponsored by: Google LLC (GSoC 2024)
PR: 281175
Differential Revision: https://reviews.freebsd.org/D46399
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| f2bd390a | 26-Aug-2024 |
Getz Mikalsen <getz@FreeBSD.org> |
lib/libc/aarch64/string: add strcspn optimized implementation
This is a port of the Scalar optimized variant of strcspn for amd64
to aarch64 It utilizes a LUT to speed up the function, a SIMD
varian
lib/libc/aarch64/string: add strcspn optimized implementation
This is a port of the Scalar optimized variant of strcspn for amd64
to aarch64 It utilizes a LUT to speed up the function, a SIMD
variant is still under development.
Performance benchmarks are as usual generated by strperf.
See the DR for benchmark results.
Tested by: fuz (exprun)
Reviewed by: fuz, emaste
Sponsored by: Google LLC (GSoC 2024)
PR: 281175
Differential Revision: https://reviews.freebsd.org/D46398
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| b91003ac | 26-Aug-2024 |
Getz Mikalsen <getz@FreeBSD.org> |
lib/libc/aarch64/string: add strspn optimized implementation
This is a port of the Scalar optimized variant of strspn for amd64
to aarch64.
It utilizes a LUT to speed up the function, a SIMD varian
lib/libc/aarch64/string: add strspn optimized implementation
This is a port of the Scalar optimized variant of strspn for amd64
to aarch64.
It utilizes a LUT to speed up the function, a SIMD variant is still
under development.
See the DR for benchmark results.
Tested by: fuz (exprun)
Reviewed by: fuz, emaste
Sponsored by: Google LLC (GSoC 2024)
PR: 281175
Differential Revision: https://reviews.freebsd.org/D46396
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