arancormonk 2ce089ccf8 rtl_sdr_fm: make SIMD runtime dispatch thread-safe with pthread_once and ensure AVX2/SSE2 paths compile by relying on function-level target attributes (remove AVX2/SSE2 guards). Gate NEON rotate to AArch64 (ARMv7 falls back to scalar) while retaining NEON widen for portability and performance.

2025-09-03 23:21:37 -04:00

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