msvcrt: Import acoshf implementation from musl.

configure

@@ -19617,7 +19617,6 @@ fi
 
 for ac_func in \
 	acosh \
-	acoshf \
 	asinh \
 	asinhf \
 	atanh \

configure.ac

@@ -2657,7 +2657,6 @@ fi
 
 AC_CHECK_FUNCS(\
 	acosh \
-	acoshf \
 	asinh \
 	asinhf \
 	atanh \

dlls/msvcrt/math.c

@@ -6599,16 +6599,26 @@ double CDECL acosh(double x)
 
 /*********************************************************************
  *      acoshf (MSVCR120.@)
+ *
+ * Copied from musl: src/math/acoshf.c
  */
 float CDECL acoshf(float x)
 {
+    UINT32 a = *(UINT32*)&x & 0x7fffffff;
+
     if (x < 1)
     {
         *_errno() = EDOM;
         feraiseexcept(FE_INVALID);
         return NAN;
     }
-    return unix_funcs->acoshf( x );
+
+    if (a < 0x3f800000 + (1 << 23)) /* |x| < 2, up to 2ulp error in [1,1.125] */
+        return log1pf(x - 1 + sqrtf((x - 1) * (x - 1) + 2 * (x - 1)));
+    if (*(UINT32*)&x < 0x3f800000 + (12 << 23)) /* 2 <= x < 0x1p12 */
+        return logf(2 * x - 1 / (x + sqrtf(x * x - 1)));
+    /* x >= 0x1p12 or x <= -2 or nan */
+    return logf(x) + 0.693147180559945309417232121458176568f;
 }
 
 /*********************************************************************

dlls/msvcrt/unixlib.c

@@ -56,18 +56,6 @@ static double CDECL unix_acosh(double x)
 }
 
 /*********************************************************************
- *      acoshf
- */
-static float CDECL unix_acoshf(float x)
-{
-#ifdef HAVE_ACOSHF
-    return acoshf(x);
-#else
-    return unix_acosh(x);
-#endif
-}
-
-/*********************************************************************
  *      asinh
  */
 static double CDECL unix_asinh(double x)
@@ -448,7 +436,6 @@ static float CDECL unix_tgammaf(float x)
 static const struct unix_funcs funcs =
 {
     unix_acosh,
-    unix_acoshf,
     unix_asinh,
     unix_asinhf,
     unix_atanh,

dlls/msvcrt/unixlib.h

@@ -24,7 +24,6 @@
 struct unix_funcs
 {
     double          (CDECL *acosh)(double x);
-    float           (CDECL *acoshf)(float x);
     double          (CDECL *asinh)(double x);
     float           (CDECL *asinhf)(float x);
     double          (CDECL *atanh)(double x);

include/config.h.in

@@ -12,9 +12,6 @@
 /* Define to 1 if you have the `acosh' function. */
 #undef HAVE_ACOSH
 
-/* Define to 1 if you have the `acoshf' function. */
-#undef HAVE_ACOSHF
-
 /* Define to 1 if you have the <alias.h> header file. */
 #undef HAVE_ALIAS_H