msvcrt: Import llround implementation from musl.

configure

@@ -19635,7 +19635,6 @@ for ac_func in \
 	lgammaf \
 	llrint \
 	llrintf \
-	llround \
 	log1p \
 	log1pf \
 	log2 \

configure.ac

@@ -2678,7 +2678,6 @@ AC_CHECK_FUNCS(\
 	lgammaf \
 	llrint \
 	llrintf \
-	llround \
 	log1p \
 	log1pf \
 	log2 \

dlls/msvcrt/math.c

@@ -4376,10 +4376,17 @@ __msvcrt_long CDECL lroundf(float x)
 
 /*********************************************************************
  *      llround (MSVCR120.@)
+ *
+ * Copied from musl: src/math/llround.c
  */
 __int64 CDECL llround(double x)
 {
-    return unix_funcs->llround( x );
+    double d = round(x);
+    if (d != (double)(__int64)d) {
+        *_errno() = EDOM;
+        return 0;
+    }
+    return d;
 }
 
 /*********************************************************************

dlls/msvcrt/unixlib.c

@@ -790,18 +790,6 @@ static int CDECL unix_lroundf(float x)
 }
 
 /*********************************************************************
- *      llround
- */
-static __int64 CDECL unix_llround(double x)
-{
-#ifdef HAVE_LLROUND
-    return llround(x);
-#else
-    return unix_round(x);
-#endif
-}
-
-/*********************************************************************
  *      sin
  */
 static double CDECL unix_sin( double x )
@@ -956,7 +944,6 @@ static const struct unix_funcs funcs =
     unix_lgammaf,
     unix_llrint,
     unix_llrintf,
-    unix_llround,
     unix_log,
     unix_logf,
     unix_log10,

dlls/msvcrt/unixlib.h

@@ -62,7 +62,6 @@ struct unix_funcs
     float           (CDECL *lgammaf)(float x);
     __int64         (CDECL *llrint)(double x);
     __int64         (CDECL *llrintf)(float x);
-    __int64         (CDECL *llround)(double x);
     double          (CDECL *log)(double x);
     float           (CDECL *logf)(float x);
     double          (CDECL *log10)(double x);

include/config.h.in

@@ -459,9 +459,6 @@
 /* Define to 1 if you have the `llrintf' function. */
 #undef HAVE_LLRINTF
 
-/* Define to 1 if you have the `llround' function. */
-#undef HAVE_LLROUND
-
 /* Define to 1 if you have the `log1p' function. */
 #undef HAVE_LOG1P