(Primitive Numerics): Add atan2, pow, asinh, acosh

and atanh to scheme<->C table.  Note asinh, acosh and atanh are C99,
and scm_asinh, scm_acosh and scm_atanh are equivalents.  Cross ref
glibc "Mathematics".  Reword this end part for clarity.

diff --git a/doc/ref/scheme-data.texi b/doc/ref/scheme-data.texi
index a5a5e5a..1d8ef86 100755 (executable)
--- a/doc/ref/scheme-data.texi
+++ b/doc/ref/scheme-data.texi
@@ -1015,21 +1015,9 @@ Return the hyperbolic arccosine of @var{x}.
 Return the hyperbolic arctangent of @var{x}.
 @end deffn
 
-For the hyperbolic arc-functions, the Guile library exports C functions
-corresponding to these Scheme procedures, but taking and returning
-arguments of type @code{double} rather than the usual @code{SCM}.
-
-@deftypefn {C Function} double scm_asinh (double x)
-@deftypefnx {C Function} double scm_acosh (double x)
-@deftypefnx {C Function} double scm_atanh (double x)
-Return the hyperbolic arcsine, arccosine or arctangent of @var{x}
-respectively.
-@end deftypefn
-
-For all the other Scheme procedures above, except @code{expt} and
-@code{atan2} (whose entries specifically mention an equivalent C
-function), the equivalent C functions are those provided by the standard
-mathematics library.  The mapping is as follows.
+C functions for the above are provided by the standard mathematics
+library.  Naturally these expect and return @code{double} arguments
+(@pxref{Mathematics,,, libc, GNU C Library Reference Manual}).
 
 @multitable {xx} {Scheme Procedure} {C Function}
 @item @tab Scheme Procedure @tab C Function
@@ -1042,15 +1030,28 @@ mathematics library.  The mapping is as follows.
 @item @tab @code{$asin}     @tab @code{asin}
 @item @tab @code{$acos}     @tab @code{acos}
 @item @tab @code{$atan}     @tab @code{atan}
+@item @tab @code{$atan2}    @tab @code{atan2}
 @item @tab @code{$exp}      @tab @code{exp}
+@item @tab @code{$expt}     @tab @code{pow}
 @item @tab @code{$log}      @tab @code{log}
 @item @tab @code{$sinh}     @tab @code{sinh}
 @item @tab @code{$cosh}     @tab @code{cosh}
 @item @tab @code{$tanh}     @tab @code{tanh}
+@item @tab @code{$asinh}    @tab @code{asinh}
+@item @tab @code{$acosh}    @tab @code{acosh}
+@item @tab @code{$atanh}    @tab @code{atanh}
 @end multitable
 
-@noindent
-Naturally, these C functions expect and return @code{double} arguments.
+@code{asinh}, @code{acosh} and @code{atanh} are C99 standard but might
+not be available on older systems.  Guile provides the following
+equivalents (on all systems).
+
+@deftypefn {C Function} double scm_asinh (double x)
+@deftypefnx {C Function} double scm_acosh (double x)
+@deftypefnx {C Function} double scm_atanh (double x)
+Return the hyperbolic arcsine, arccosine or arctangent of @var{x}
+respectively.
+@end deftypefn
 
 
 @node Bitwise Operations