Document powl(3)

PR: 191751
Sponsored by: EMC / Isilon Storage Division

lib/msun/Makefile

@@ -169,7 +169,8 @@ MLINKS+=cosh.3 coshf.3 cosh.3 coshl.3
 MLINKS+=csqrt.3 csqrtf.3 csqrt.3 csqrtl.3
 MLINKS+=erf.3 erfc.3 erf.3 erff.3 erf.3 erfcf.3 erf.3 erfl.3 erf.3 erfcl.3
 MLINKS+=exp.3 expm1.3 exp.3 expm1f.3 exp.3 expm1l.3 exp.3 pow.3 exp.3 powf.3 \
-	exp.3 exp2.3 exp.3 exp2f.3 exp.3 exp2l.3 exp.3 expf.3 exp.3 expl.3
+	exp.3 powl.3 exp.3 exp2.3 exp.3 exp2f.3 exp.3 exp2l.3 exp.3 expf.3 \
+	exp.3 expl.3
 MLINKS+=fabs.3 fabsf.3 fabs.3 fabsl.3
 MLINKS+=fdim.3 fdimf.3 fdim.3 fdiml.3
 MLINKS+=feclearexcept.3 fegetexceptflag.3 feclearexcept.3 feraiseexcept.3 \

lib/msun/man/exp.3

@@ -43,7 +43,8 @@
 .Nm expm1f ,
 .Nm expm1l ,
 .Nm pow ,
-.Nm powf
+.Nm powf ,
+.Nm powl
 .Nd exponential and power functions
 .Sh LIBRARY
 .Lb libm
@@ -71,6 +72,8 @@
 .Fn pow "double x" "double y"
 .Ft float
 .Fn powf "float x" "float y"
+.Ft long double
+.Fn powl "long double x" "long double y"
 .Sh DESCRIPTION
 The
 .Fn exp ,
@@ -99,9 +102,10 @@ functions compute the value exp(x)\-1 accurately even for tiny argument
 .Fa x .
 .Pp
 The
-.Fn pow
+.Fn pow ,
+.Fn powf ,
 and the
-.Fn powf
+.Fn powl
 functions compute the value
 of
 .Ar x
@@ -122,9 +126,10 @@ Otherwise the error in these functions is generally below one
 These functions will return the appropriate computation unless an error
 occurs or an argument is out of range.
 The functions
-.Fn pow x y
+.Fn pow x y ,
+.Fn powf x y ,
 and
-.Fn powf x y
+.Fn powl x y
 raise an invalid exception and return an \*(Na if
 .Fa x
 < 0 and