mirror of
https://github.com/apache/nuttx.git
synced 2026-09-09 10:26:37 +00:00
502feadb3d
The existing first-order LCG (seed = 470001 * seed % 999563) has several quality problems: - Output range limited to [1, 999562] (~20 bits) instead of full 32-bit - Lower bits have very short periods (8-bit period = 1, 16-bit = 105) - Overall period only ~1M, far too short for many applications - Causes mbedtls_rsa_gen_key to loop forever when rand() consumption aligns with the cycle length (issue #16760) Replace the entire order-based LCG implementation (CONFIG_LIBC_RAND_ORDER 0-3) with Marsaglia's xorshift32: - Full 32-bit output range - Period 2^32 - 1 (~4.29 billion) - Fast: just three XOR/shift operations - No floating-point math needed - No CONFIG_LIBC_RAND_ORDER configuration required Remove the CONFIG_LIBC_RAND_ORDER Kconfig option and clean up all defconfig references (12 boards) and related comments. Signed-off-by: hanzhijian <hanzhijian@zepp.com> |
||
|---|---|---|
| .. | ||
| common | ||
| esp32s3-8048S043 | ||
| esp32s3-box | ||
| esp32s3-devkit | ||
| esp32s3-eye | ||
| esp32s3-korvo-2 | ||
| esp32s3-lcd-ev | ||
| esp32s3-lhcbit | ||
| esp32s3-meadow | ||
| esp32s3-ws-lcd128 | ||
| esp32s3-xiao | ||
| lckfb-szpi-esp32s3 | ||