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zephyr/lib/os
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Klaus H. Sorensen 4e7b5769bd lib: crc32_sw: 4 bit at a time implementation 
Calculate crc32 4 bits at a time. The return value of the calculation is
identical to the previous 1 bit at a time implementation.

Results in a speed up of a factor 3 at the cost of using 64 bytes of
flash for a crc table.

Calculating crc32 of 128kB of flash on a 120MHz Kinetis MKE16F512
Cortex-M4 takes 99ms using the 1 bit at a time implementation, and 30ms
using the 4 bits at a time implementation.

The crc32 routine is used by subsys/canbus/canopen/canopen_program.c to
calculate crc of flash images.

Signed-off-by: Klaus H. Sorensen <khso@vestas.com>
2021-01-24 14:24:48 -05:00
..
assert.c assert: Completely remove file info and condition expression 2020-01-13 13:59:55 +01:00
base64.c zephyr: replace zephyr integer types with C99 types 2020-06-08 08:23:57 -05:00
cbprintf.c lib: add cbprintf capability 2020-11-13 06:38:01 -05:00
cbprintf_complete.c lib: os: cbprintf: correct arg extraction of wide characters 2021-01-07 14:02:06 +01:00
cbprintf_nano.c lib: cbprintf: remove cbprintf_arglen 2021-01-07 14:02:06 +01:00
CMakeLists.txt lib/os: P4 Work Queue: Pooled Parallel Preemptible Priority-based 2021-01-15 11:35:50 -05:00
crc7_sw.c zephyr: replace zephyr integer types with C99 types 2020-06-08 08:23:57 -05:00
crc8_sw.c zephyr: replace zephyr integer types with C99 types 2020-06-08 08:23:57 -05:00
crc16_sw.c zephyr: replace zephyr integer types with C99 types 2020-06-08 08:23:57 -05:00
crc32_sw.c lib: crc32_sw: 4 bit at a time implementation 2021-01-24 14:24:48 -05:00
dec.c zephyr: replace zephyr integer types with C99 types 2020-06-08 08:23:57 -05:00
fdtable.c lib: fdtable: fix z_free_fd multiple calls fd leak 2020-09-10 16:04:36 -05:00
heap-validate.c lib/os/heap: make "solo free headers" into first-class citizens 2020-07-14 19:35:52 -04:00
heap.c z_heap_aligned_alloc(): avoid memory wastage 2021-01-22 10:04:43 -05:00
heap.h lib/os/heap: introduce option to force big heap mode 2021-01-24 10:11:11 -05:00
hex.c lib: hex: Remove constant expression 2020-09-02 13:45:50 -04:00
json.c misc: Replace assert include and calls by sys/__assert.h equivalent 2020-10-02 11:42:40 +02:00
Kconfig lib/os/heap: introduce option to force big heap mode 2021-01-24 10:11:11 -05:00
Kconfig.cbprintf lib: add cbprintf capability 2020-11-13 06:38:01 -05:00
mutex.c kernel/timeout: Make timeout arguments an opaque type 2020-03-31 19:40:47 -04:00
notify.c zephyr: replace zephyr integer types with C99 types 2020-06-08 08:23:57 -05:00
onoff.c code-guideline: Fixing code violation 10.4 Rule 2020-10-01 17:13:29 -04:00
p4wq.c lib/os: P4 Work Queue: Pooled Parallel Preemptible Priority-based 2021-01-15 11:35:50 -05:00
printk.c lib/os: replace z_vprintk with cbprintf 2020-11-13 06:38:01 -05:00
rb.c cleanup: include/: move misc/rb.h to sys/rb.h 2019-06-27 22:55:49 -04:00
ring_buffer.c tests: ringbuffer: code coverage improvements 2021-01-18 23:12:47 -05:00
sem.c code-guideline: Fixing code violation 10.4 Rule 2020-10-01 17:13:29 -04:00
thread_entry.c lib: os: remove dead code 2019-06-18 09:08:01 -04:00
timeutil.c lib/timeutil: add utilities to manage local/reference clock alignment 2021-01-20 16:38:56 -05:00
work_q.c os: work_q: Use NULL instead of 0 2020-09-02 13:45:50 -04:00