std: removes logarithms family function edge cases handling for solaris.

Issue had been fixed over time with solaris, 11.x behaves correctly
 (and we support it as minimum), illumos works correctly too.

Author: devnexen

library/std/src/sys/pal/mod.rs

@@ -94,32 +94,7 @@ cfg_if::cfg_if! {
     }
 }
 
-// Solaris/Illumos requires a wrapper around log, log2, and log10 functions
-// because of their non-standard behavior (e.g., log(-n) returns -Inf instead
-// of expected NaN).
 #[cfg(not(test))]
-#[cfg(any(target_os = "solaris", target_os = "illumos"))]
-#[inline]
-pub fn log_wrapper<F: Fn(f64) -> f64>(n: f64, log_fn: F) -> f64 {
-    if n.is_finite() {
-        if n > 0.0 {
-            log_fn(n)
-        } else if n == 0.0 {
-            f64::NEG_INFINITY // log(0) = -Inf
-        } else {
-            f64::NAN // log(-n) = NaN
-        }
-    } else if n.is_nan() {
-        n // log(NaN) = NaN
-    } else if n > 0.0 {
-        n // log(Inf) = Inf
-    } else {
-        f64::NAN // log(-Inf) = NaN
-    }
-}
-
-#[cfg(not(test))]
-#[cfg(not(any(target_os = "solaris", target_os = "illumos")))]
 #[inline]
 pub fn log_wrapper<F: Fn(f64) -> f64>(n: f64, log_fn: F) -> f64 {
     log_fn(n)