1 files changed, 211 insertions, 0 deletions
diff --git a/third_party/rust/glslopt/glsl-optimizer/include/c99_math.h b/third_party/rust/glslopt/glsl-optimizer/include/c99_math.h
new file mode 100644
index 0000000000..e906c26aa5
--- /dev/null
+++ b/third_party/rust/glslopt/glsl-optimizer/include/c99_math.h
@@ -0,0 +1,211 @@
+/**************************************************************************
+ *
+ * Copyright 2007-2015 VMware, Inc.
+ * All Rights Reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sub license, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the
+ * next paragraph) shall be included in all copies or substantial portions
+ * of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
+ * IN NO EVENT SHALL VMWARE AND/OR ITS SUPPLIERS BE LIABLE FOR
+ * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
+ * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
+ * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ *
+ **************************************************************************/
+
+/**
+ * Wrapper for math.h which makes sure we have definitions of all the c99
+ * functions.
+ */
+
+
+#ifndef _C99_MATH_H_
+#define _C99_MATH_H_
+
+#include <math.h>
+#include "c99_compat.h"
+
+
+/* This is to ensure that we get M_PI, etc. definitions */
+#if defined(_MSC_VER) && !defined(_USE_MATH_DEFINES)
+#error _USE_MATH_DEFINES define required when building with MSVC
+#endif 
+
+
+#if !defined(_MSC_VER) && \
+    __STDC_VERSION__ < 199901L && \
+    (!defined(_XOPEN_SOURCE) || _XOPEN_SOURCE < 600) && \
+    !defined(__cplusplus)
+
+static inline long int
+lrint(double d)
+{
+   long int rounded = (long int)(d + 0.5);
+
+   if (d - floor(d) == 0.5) {
+      if (rounded % 2 != 0)
+         rounded += (d > 0) ? -1 : 1;
+   }
+
+   return rounded;
+}
+
+static inline long int
+lrintf(float f)
+{
+   long int rounded = (long int)(f + 0.5f);
+
+   if (f - floorf(f) == 0.5f) {
+      if (rounded % 2 != 0)
+         rounded += (f > 0) ? -1 : 1;
+   }
+
+   return rounded;
+}
+
+static inline long long int
+llrint(double d)
+{
+   long long int rounded = (long long int)(d + 0.5);
+
+   if (d - floor(d) == 0.5) {
+      if (rounded % 2 != 0)
+         rounded += (d > 0) ? -1 : 1;
+   }
+
+   return rounded;
+}
+
+static inline long long int
+llrintf(float f)
+{
+   long long int rounded = (long long int)(f + 0.5f);
+
+   if (f - floorf(f) == 0.5f) {
+      if (rounded % 2 != 0)
+         rounded += (f > 0) ? -1 : 1;
+   }
+
+   return rounded;
+}
+
+static inline float
+exp2f(float f)
+{
+   return powf(2.0f, f);
+}
+
+static inline double
+exp2(double d)
+{
+   return pow(2.0, d);
+}
+
+#endif /* C99 */
+
+
+/*
+ * signbit() is a macro on Linux.  Not available on Windows.
+ */
+#ifndef signbit
+#define signbit(x) ((x) < 0.0f)
+#endif
+
+
+#ifndef M_PI
+#define M_PI (3.14159265358979323846)
+#endif
+
+#ifndef M_E
+#define M_E (2.7182818284590452354)
+#endif
+
+#ifndef M_LOG2E
+#define M_LOG2E (1.4426950408889634074)
+#endif
+
+#ifndef FLT_MAX_EXP
+#define FLT_MAX_EXP 128
+#endif
+
+
+#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(__cplusplus)
+/* For C++, fpclassify() should be defined in <cmath> */
+#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>
+
+static inline 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
+#error "Need to include or define an fpclassify function"
+#endif
+
+
+/* Since C++11, the following functions are part of the std namespace. Their C
+ * counteparts should still exist in the global namespace, however cmath
+ * undefines those functions, which in glibc 2.23, are defined as macros rather
+ * than functions as in glibc 2.22.
+ */
+#if __cplusplus >= 201103L && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 23))
+#include <cmath>
+
+using std::fpclassify;
+using std::isfinite;
+using std::isinf;
+using std::isnan;
+using std::isnormal;
+using std::signbit;
+using std::isgreater;
+using std::isgreaterequal;
+using std::isless;
+using std::islessequal;
+using std::islessgreater;
+using std::isunordered;
+#endif
+
+
+#endif /* #define _C99_MATH_H_ */