Merge pull request #593 from Cuda-Chen/SSE2NEON_PRECISE_MINMAX-clarif…

…ication

Add notice that NEON handles certain IEEE single-precision values

README.md

@@ -68,8 +68,9 @@ but SSE intrinsic `_mm_maddubs_epi16` has to be implemented with 13+ NEON instru
 
 ## Compile-time Configurations
 
+Though floating-point operations in NEON use the IEEE single-precision format, NEON does not fully comply to the IEEE standard when inputs or results are denormal or NaN values for minimizing power consumption as well as maximizing performance.
 Considering the balance between correctness and performance, `sse2neon` recognizes the following compile-time configurations:
-* `SSE2NEON_PRECISE_MINMAX`: Enable precise implementation of `_mm_min_{ps,pd}` and `_mm_max_{ps,pd}`. If you need consistent results such as NaN special cases, enable it.
+* `SSE2NEON_PRECISE_MINMAX`: Enable precise implementation of `_mm_min_{ps,pd}` and `_mm_max_{ps,pd}`. If you need consistent results such as handling with NaN values, enable it.
 * `SSE2NEON_PRECISE_DIV` (deprecated): Enable precise implementation of `_mm_rcp_ps` and `_mm_div_ps` by additional Netwon-Raphson iteration for accuracy.
 * `SSE2NEON_PRECISE_SQRT` (deprecated): Enable precise implementation of `_mm_sqrt_ps` and `_mm_rsqrt_ps` by additional Netwon-Raphson iteration for accuracy.
 * `SSE2NEON_PRECISE_DP`: Enable precise implementation of `_mm_dp_pd`. When the conditional bit is not set, the corresponding multiplication would not be executed.