#include "r600_pipe_common.h"
#include "util/u_surface.h"
+#include "util/rand_xor.h"
static uint64_t seed_xorshift128plus[2];
-/* Super fast random number generator.
- *
- * This rand_xorshift128plus function by Sebastiano Vigna belongs
- * to the public domain.
- */
-static uint64_t rand_xorshift128plus(void)
-{
- uint64_t *s = seed_xorshift128plus;
-
- uint64_t s1 = s[0];
- const uint64_t s0 = s[1];
- s[0] = s0;
- s1 ^= s1 << 23;
- s[1] = s1 ^ s0 ^ (s1 >> 18) ^ (s0 >> 5);
- return s[1] + s0;
-}
-
#define RAND_NUM_SIZE 8
/* The GPU blits are emulated on the CPU using these CPU textures. */
assert(t->stride % RAND_NUM_SIZE == 0);
assert(cpu->stride % RAND_NUM_SIZE == 0);
- for (x = 0; x < size; x++)
- *ptr++ = *ptr_cpu++ = rand_xorshift128plus();
+ for (x = 0; x < size; x++) {
+ *ptr++ = *ptr_cpu++ =
+ rand_xorshift128plus(seed_xorshift128plus);
+ }
}
}