msvcrt: Don't compile msvcr120 math functions in older versions.

dlls/msvcrt/math.c

@@ -4144,6 +4144,38 @@ void __cdecl __libm_sse2_sqrt_precise(void)
 #endif  /* __i386__ */
 
 /*********************************************************************
+ *      _fdclass (MSVCR120.@)
+ *
+ * Copied from musl: src/math/__fpclassifyf.c
+ */
+short CDECL _fdclass(float x)
+{
+    union { float f; UINT32 i; } u = { x };
+    int e = u.i >> 23 & 0xff;
+
+    if (!e) return u.i << 1 ? FP_SUBNORMAL : FP_ZERO;
+    if (e == 0xff) return u.i << 9 ? FP_NAN : FP_INFINITE;
+    return FP_NORMAL;
+}
+
+/*********************************************************************
+ *      _dclass (MSVCR120.@)
+ *
+ * Copied from musl: src/math/__fpclassify.c
+ */
+short CDECL _dclass(double x)
+{
+    union { double f; UINT64 i; } u = { x };
+    int e = u.i >> 52 & 0x7ff;
+
+    if (!e) return u.i << 1 ? FP_SUBNORMAL : FP_ZERO;
+    if (e == 0x7ff) return (u.i << 12) ? FP_NAN : FP_INFINITE;
+    return FP_NORMAL;
+}
+
+#if _MSVCR_VER>=120
+
+/*********************************************************************
  *      cbrt (MSVCR120.@)
  */
 double CDECL cbrt(double x)
@@ -4288,38 +4320,6 @@ __int64 CDECL llrintf(float x)
 }
 
 /*********************************************************************
- *      _fdclass (MSVCR120.@)
- *
- * Copied from musl: src/math/__fpclassifyf.c
- */
-short CDECL _fdclass(float x)
-{
-    union { float f; UINT32 i; } u = { x };
-    int e = u.i >> 23 & 0xff;
-
-    if (!e) return u.i << 1 ? FP_SUBNORMAL : FP_ZERO;
-    if (e == 0xff) return u.i << 9 ? FP_NAN : FP_INFINITE;
-    return FP_NORMAL;
-}
-
-/*********************************************************************
- *      _dclass (MSVCR120.@)
- *
- * Copied from musl: src/math/__fpclassify.c
- */
-short CDECL _dclass(double x)
-{
-    union { double f; UINT64 i; } u = { x };
-    int e = u.i >> 52 & 0x7ff;
-
-    if (!e) return u.i << 1 ? FP_SUBNORMAL : FP_ZERO;
-    if (e == 0x7ff) return (u.i << 12) ? FP_NAN : FP_INFINITE;
-    return FP_NORMAL;
-}
-
-#if _MSVCR_VER>=120
-
-/*********************************************************************
  *      round (MSVCR120.@)
  *
  * Based on musl implementation: src/math/round.c