time-to-botec

commit a7bb3bc812f7dffc67a448be3fe6538bddaaf6c1
parent c73476e5aa2db8ab7a5312d2379af6da73b0046a
Author: NunoSempere <nuno.sempere@protonmail.com>
Date:   Sat,  3 Jun 2023 10:02:01 -0600

xorshift minor tweaks

Diffstat:
M
C/out/samples
 | 
0

M
C/samples.c
 | 
2
+-
M
C/scratchpad/xorshift.c
 | 
2
+-

3 files changed, 2 insertions(+), 2 deletions(-)
diff --git a/C/out/samples b/C/out/samples
Binary files differ.
diff --git a/C/samples.c b/C/samples.c
@@ -167,7 +167,7 @@ void mixture(float (*samplers[])(uint32_t*), float* weights, int n_dists, float*
     uint32_t** seeds = malloc(n_threads * sizeof(uint32_t*));
 		for (uint32_t i = 0; i < n_threads; i++) {
         seeds[i] = malloc(sizeof(uint32_t));
-        *seeds[i] = i + 1;
+        *seeds[i] = i + 1; // xorshift can't start with 0
     }
 
     #pragma omp parallel private(i, p1, sample_index, split_array_length)
diff --git a/C/scratchpad/xorshift.c b/C/scratchpad/xorshift.c
@@ -13,7 +13,7 @@ uint32_t xorshift32(uint32_t* state)
 }
 
 float rand_xorshift32(uint32_t* state){
-	return (float) xorshift32(state) / UINT32_MAX;
+	return (float) xorshift32(state) / (float) UINT32_MAX;
 }
 
 int main(){