msvcr120: Add atanh.

configure

@@ -17410,6 +17410,8 @@ for ac_func in \
 	acoshf \
 	asinh \
 	asinhf \
+	atanh \
+	atanhf \
 	cbrt \
 	cbrtf \
 	erf \

configure.ac

@@ -2598,6 +2598,8 @@ AC_CHECK_FUNCS(\
 	acoshf \
 	asinh \
 	asinhf \
+	atanh \
+	atanhf \
 	cbrt \
 	cbrtf \
 	erf \

dlls/api-ms-win-crt-math-l1-1-0/api-ms-win-crt-math-l1-1-0.spec

@@ -136,9 +136,9 @@
 @ cdecl atan2(double double) ucrtbase.atan2
 @ cdecl -arch=arm,x86_64 atan2f(float float) ucrtbase.atan2f
 @ cdecl -arch=arm,x86_64 atanf(float) ucrtbase.atanf
-@ stub atanh
-@ stub atanhf
-@ stub atanhl
+@ cdecl atanh(double) ucrtbase.atanh
+@ cdecl atanhf(float) ucrtbase.atanhf
+@ cdecl atanhl(double) ucrtbase.atanhl
 @ stub cabs
 @ stub cabsf
 @ stub cabsl

dlls/msvcr120/msvcr120.spec

@@ -2025,9 +2025,9 @@
 @ cdecl -arch=arm,x86_64 atanf(float) MSVCRT_atanf
 @ cdecl atan2(double double) MSVCRT_atan2
 @ cdecl -arch=arm,x86_64 atan2f(float float) MSVCRT_atan2f
-@ stub atanh
-@ stub atanhf
-@ stub atanhl
+@ cdecl atanh(double) MSVCR120_atanh
+@ cdecl atanhf(float) MSVCR120_atanhf
+@ cdecl atanhl(double) MSVCR120_atanhl
 @ cdecl -private atexit(ptr) MSVCRT_atexit  # not imported to avoid conflicts with Mingw
 @ cdecl atof(str) MSVCRT_atof
 @ cdecl atoi(str) MSVCRT_atoi

dlls/msvcr120_app/msvcr120_app.spec

@@ -1691,9 +1691,9 @@
 @ cdecl -arch=arm,x86_64 atanf(float) msvcr120.atanf
 @ cdecl atan2(double double) msvcr120.atan2
 @ cdecl -arch=arm,x86_64 atan2f(float float) msvcr120.atan2f
-@ stub atanh
-@ stub atanhf
-@ stub atanhl
+@ cdecl atanh(double) msvcr120.atanh
+@ cdecl atanhf(float) msvcr120.atanhf
+@ cdecl atanhl(double) msvcr120.atanhl
 @ cdecl -private atexit(ptr) msvcr120.atexit
 @ cdecl atof(str) msvcr120.atof
 @ cdecl atoi(str) msvcr120.atoi

dlls/msvcrt/math.c

@@ -2944,6 +2944,72 @@ LDOUBLE CDECL MSVCR120_acoshl(LDOUBLE x)
 }
 
 /*********************************************************************
+ *      atanh (MSVCR120.@)
+ */
+double CDECL MSVCR120_atanh(double x)
+{
+    double ret;
+
+    if (x > 1 || x < -1) {
+        MSVCRT_fenv_t env;
+
+        *MSVCRT__errno() = MSVCRT_EDOM;
+
+        /* on Linux atanh returns -NAN in this case */
+        MSVCRT_fegetenv(&env);
+        env.status |= MSVCRT__SW_INVALID;
+        MSVCRT_fesetenv(&env);
+        return NAN;
+    }
+
+#ifdef HAVE_ATANH
+    ret = atanh(x);
+#else
+    if (-1e-6 < x && x < 1e-6) ret = x + x*x*x/3;
+    else ret = (log(1+x) - log(1-x)) / 2;
+#endif
+
+    if (!isfinite(ret)) *MSVCRT__errno() = MSVCRT_ERANGE;
+    return ret;
+}
+
+/*********************************************************************
+ *      atanhf (MSVCR120.@)
+ */
+float CDECL MSVCR120_atanhf(float x)
+{
+#ifdef HAVE_ATANHF
+    double ret;
+
+    if (x > 1 || x < -1) {
+        MSVCRT_fenv_t env;
+
+        *MSVCRT__errno() = MSVCRT_EDOM;
+
+        MSVCRT_fegetenv(&env);
+        env.status |= MSVCRT__SW_INVALID;
+        MSVCRT_fesetenv(&env);
+        return NAN;
+    }
+
+    ret = atanhf(x);
+
+    if (!isfinite(ret)) *MSVCRT__errno() = MSVCRT_ERANGE;
+    return ret;
+#else
+    return MSVCR120_atanh(x);
+#endif
+}
+
+/*********************************************************************
+ *      atanhl (MSVCR120.@)
+ */
+LDOUBLE CDECL MSVCR120_atanhl(LDOUBLE x)
+{
+    return MSVCR120_atanh(x);
+}
+
+/*********************************************************************
  *      _scalb  (MSVCRT.@)
  *      scalbn  (MSVCR120.@)
  *      scalbln (MSVCR120.@)

dlls/ucrtbase/ucrtbase.spec

@@ -2167,9 +2167,9 @@
 @ cdecl atan2(double double) MSVCRT_atan2
 @ cdecl -arch=arm,x86_64 atan2f(float float) MSVCRT_atan2f
 @ cdecl -arch=arm,x86_64 atanf(float) MSVCRT_atanf
-@ stub atanh
-@ stub atanhf
-@ stub atanhl
+@ cdecl atanh(double) MSVCR120_atanh
+@ cdecl atanhf(float) MSVCR120_atanhf
+@ cdecl atanhl(double) MSVCR120_atanhl
 @ cdecl atof(str) MSVCRT_atof
 @ cdecl atoi(str) MSVCRT_atoi
 @ cdecl atol(str) ntdll.atol

include/config.h.in

@@ -50,6 +50,12 @@
 /* Define to 1 if you have the <asm/user.h> header file. */
 #undef HAVE_ASM_USER_H
 
+/* Define to 1 if you have the `atanh' function. */
+#undef HAVE_ATANH
+
+/* Define to 1 if you have the `atanhf' function. */
+#undef HAVE_ATANHF
+
 /* Define to 1 if you have the <AudioToolbox/AudioConverter.h> header file. */
 #undef HAVE_AUDIOTOOLBOX_AUDIOCONVERTER_H