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old/9apr26_prerefactor/include/amsculib2/amscu_random.hpp

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+#ifndef __AMSCU_RANDOM_HPP__
+#define __AMSCU_RANDOM_HPP__
+
+namespace amscuda
+{
+
+// Random Number Gerneators
+
+
+// faster floating point hash function used in fractal generators
+__device__ __host__ float fhash1d_su(float x);
+
+__device__ __host__ float fhash3d_su(float x, float y, float z);
+
+__device__ __host__ float fhash4d_su(float x, float y, float z, float w);
+
+
+//////////////////////////////////////////////////
+// Deterministic Pseudorandom int32_t Generator //
+//////////////////////////////////////////////////
+
+//Next seed in simple 32 bit integer deterministic psuedo-rand generator
+__host__ __device__ void dpr32_nextseed(int32_t *rseed_inout);
+
+//Simple 32 bit integer deterministic pseudo-random generator
+// *not* for cryptography
+// Frequency of generated floats should be uniform [0,1)
+__host__ __device__ float dpr32_randf(int32_t *rseed_inout);
+
+//box muller standard normal pseudorandom variable
+__host__ __device__ float dpr32_randnf(int32_t *rseed_inout);
+
+//////////////////////////////////////////////////
+// Deterministic Pseudorandom int64_t Generator //
+//////////////////////////////////////////////////
+
+//operates without side-effects on explicit seed for threaded use
+//deterministic pseudorandom number generator - takes seed and returns next seed
+__host__ __device__ void dpr64_nextseed(int64_t *seedinout);
+
+//deterministic pseudorandom number generator - takes seed and returns next seed
+//returns uniformly distributed double
+__host__ __device__ double dpr64_randd(int64_t *seedinout);
+
+__host__ __device__ float dpr64_randf(int64_t *seedinout);
+
+
+void test_dprg64();
+void test_dprg32();
+
+
+}; //end namespace amscuda
+
+#endif
+