* Mesa 3-D graphics library
*
* Copyright (C) 1999-2007 Brian Paul All Rights Reserved.
+ * Copyright (C) 2018-2019 Intel Corporation
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
extern "C" {
#endif
+#define FP16_ONE ((uint16_t) 0x3c00)
+#define FP16_ZERO ((uint16_t) 0)
+
uint16_t _mesa_float_to_half(float val);
float _mesa_half_to_float(uint16_t val);
+uint8_t _mesa_half_to_unorm8(uint16_t v);
+uint16_t _mesa_uint16_div_64k_to_half(uint16_t v);
+
+/*
+ * _mesa_float_to_float16_rtz is no more than a wrapper to the counterpart
+ * softfloat.h call. Still, softfloat.h conversion API is meant to be kept
+ * private. In other words, only use the API published here, instead of
+ * calling directly the softfloat.h one.
+ */
+uint16_t _mesa_float_to_float16_rtz(float val);
+
+static inline uint16_t
+_mesa_float_to_float16_rtne(float val)
+{
+ return _mesa_float_to_half(val);
+}
static inline bool
_mesa_half_is_negative(uint16_t h)
}
+#ifdef __cplusplus
+
+/* Helper class for disambiguating fp16 from uint16_t in C++ overloads */
+
+struct float16_t {
+ uint16_t bits;
+ float16_t(float f) : bits(_mesa_float_to_half(f)) {}
+ float16_t(double d) : bits(_mesa_float_to_half(d)) {}
+ float16_t(uint16_t bits) : bits(bits) {}
+ static float16_t one() { return float16_t(FP16_ONE); }
+ static float16_t zero() { return float16_t(FP16_ZERO); }
+};
+
+#endif
+
+
#ifdef __cplusplus
} /* extern C */
#endif