test_strcpy(), test_strncpy() and test_stpcpy() applied the same offset
to the source and to the destination, so both pointers always shared the
same word congruence. Architecture optimized copy routines take a
different code path when the two offsets differ: a byte prologue to
align the destination, then either a byte fallback or a shift-merge loop
that recombines two source words per store. None of that was reached by
the test.
Vary the source and destination offsets independently over 0..7 in those
three tests, so both the equal congruence (aligned word copy) and the
unequal congruence (shift-merge) paths are covered, and report both
offsets on failure so a regression points at the offending combination.
Also drop the ARCH_TOOLCHAIN_GNU dependency from TESTING_ARCH_LIBC. The
test only uses standard C string functions and perf_gettime(), with no
GNU specific construct, so it builds with non GNU toolchains such as
TASKING as well.
Impact: test only, selected by CONFIG_TESTING_ARCH_LIBC (default n).
Dropping the ARCH_TOOLCHAIN_GNU dependency only widens the set of
toolchains that may select the test, no existing configuration changes.
Testing: built and ran sim:nsh on Linux x86_64 (Ubuntu 24.04,
gcc 13.3.0) with CONFIG_TESTING_ARCH_LIBC=y. strcpy, strncpy and
stpcpy report PASSED for all 64 offset combinations, and
"arch_libc_test Passed".
Assisted-by: Claude:claude-opus-5
Signed-off-by: zhangyuan29 <zhangyuan29@xiaomi.com>
Add test_strchrnul() and speed_strchrnul(), selected by the new
CONFIG_TESTING_ARCH_LIBC_STRCHRNUL option, covering the hit, miss and
NUL cases.
Sweep alignment 0..7 and the boundary sizes {0, 1, 7, 8, 9, 15, 16, 17,
31, 32, 33, 63, 64, 65, 127, 128, 129, 255, 256, 257} in the scan
function tests (memcmp, memchr, strlen, strcmp, strchr, strncmp,
strnlen, strrchr) and in memmove. Those sizes sit on the 8 and 16 byte
chunk edges and on the sub-word tails, so vectorized (NEON/MVE) and
word-at-a-time implementations are stressed exactly at their alignment
and size boundaries instead of only at "nice" lengths. memmove is
additionally exercised across four overlap layouts: forward, backward,
contained and adjacent.
Impact: test only, selected by CONFIG_TESTING_ARCH_LIBC (default n).
Testing: built and ran qemu-armv7a:nsh (Cortex-A7, generic C
implementation) and sim:nsh on Linux x86_64 (Ubuntu 24.04, gcc 13.3.0)
with CONFIG_TESTING_ARCH_LIBC=y. All 16 enabled functions report
PASSED and "arch_libc_test Passed". These tests pass against the
generic C routines, which establishes the correctness baseline before
architecture optimized assembly is introduced.
Signed-off-by: anjiahao <anjiahao@xiaomi.com>
The arch_libc test only covered strcpy, so the architecture optimized
implementations of the remaining string and memory routines were never
exercised by the test suite.
Extend the test to also cover memcpy, memmove, memset, memcmp, memchr,
strlen, strcmp, strchr, strncmp, strnlen, strncpy, stpcpy, strcat and
strrchr:
* Every function gets a correctness test that sweeps the buffer
alignment and the transfer size and compares the result against the
expected value.
* Every function gets a speed test that reports the average cycle count
measured with perf_gettime().
* Every individual test is selected by its own
CONFIG_TESTING_ARCH_LIBC_<FUNC> option (default y), so a target can
drop the ones it does not need.
Impact: test only. Nothing is built unless CONFIG_TESTING_ARCH_LIBC
(default n) is selected, so no existing board configuration changes.
Testing: built and ran sim:nsh on Linux x86_64 (Ubuntu 24.04,
gcc 13.3.0) with CONFIG_TESTING_ARCH_LIBC=y. All 15 enabled functions
report PASSED and "arch_libc_test Passed".
Signed-off-by: Xiang Xiao <xiaoxiang@xiaomi.com>
Specify architecture format in Kconfig to ensure proper configuration
handling for different architectures in testing modules.
Signed-off-by: tengshuangshuang <tengshuangshuang@xiaomi.com>
