Revert "util: Move the alternate fpclassify implementation to util"

This reverts commits d6eb572905e39c36168b8f5da240af961f9dde0a and
58e8468d113c7d3d4a59ea4a8d70fd45b78e85e6.

This is no longer necessary as we aren't using it in NIR anymore.  Also, it
broke the build on some strange systems so let's put it back in querymatrix
where it came from.

Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=88852

Acked-by: Matt Turner <mattst88@gmail.com>

1 files changed, 50 insertions, 1 deletions

diff --git a/src/mesa/main/querymatrix.c b/src/mesa/main/querymatrix.c
index d2d643b..ef85175 100644
--- a/src/mesa/main/querymatrix.c
+++ b/src/mesa/main/querymatrix.c
@@ -17,7 +17,6 @@
 #include "glheader.h"
 #include "querymatrix.h"
 #include "main/get.h"
-#include "util/macros.h"
 
 
 /**
@@ -38,6 +37,56 @@
 #define INT_TO_FIXED(x) ((GLfixed) ((x) << 16))
 #define FLOAT_TO_FIXED(x) ((GLfixed) ((x) * 65536.0))
 
+#if defined(fpclassify)
+/* ISO C99 says that fpclassify is a macro.  Assume that any implementation
+ * of fpclassify, whether it's in a C99 compiler or not, will be a macro.
+ */
+#elif defined(_MSC_VER)
+/* Not required on VS2013 and above. */
+/* Oddly, the fpclassify() function doesn't exist in such a form
+ * on MSVC.  This is an implementation using slightly different
+ * lower-level Windows functions.
+ */
+#include <float.h>
+
+enum {FP_NAN, FP_INFINITE, FP_ZERO, FP_SUBNORMAL, FP_NORMAL}
+fpclassify(double x)
+{
+    switch(_fpclass(x)) {
+        case _FPCLASS_SNAN: /* signaling NaN */
+        case _FPCLASS_QNAN: /* quiet NaN */
+            return FP_NAN;
+        case _FPCLASS_NINF: /* negative infinity */
+        case _FPCLASS_PINF: /* positive infinity */
+            return FP_INFINITE;
+        case _FPCLASS_NN:   /* negative normal */
+        case _FPCLASS_PN:   /* positive normal */
+            return FP_NORMAL;
+        case _FPCLASS_ND:   /* negative denormalized */
+        case _FPCLASS_PD:   /* positive denormalized */
+            return FP_SUBNORMAL;
+        case _FPCLASS_NZ:   /* negative zero */
+        case _FPCLASS_PZ:   /* positive zero */
+            return FP_ZERO;
+        default:
+            /* Should never get here; but if we do, this will guarantee
+             * that the pattern is not treated like a number.
+             */
+            return FP_NAN;
+    }
+}
+
+#else
+
+enum {FP_NAN, FP_INFINITE, FP_ZERO, FP_SUBNORMAL, FP_NORMAL}
+fpclassify(double x)
+{
+   /* XXX do something better someday */
+   return FP_NORMAL;
+}
+
+#endif
+
 GLbitfield GLAPIENTRY _mesa_QueryMatrixxOES(GLfixed mantissa[16], GLint exponent[16])
 {
     GLfloat matrix[16];