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| author | jakubtomsu <66876057+jakubtomsu@users.noreply.github.com> | 2026-02-17 18:34:37 +0100 |
|---|---|---|
| committer | jakubtomsu <66876057+jakubtomsu@users.noreply.github.com> | 2026-02-17 18:34:37 +0100 |
| commit | e8aac50f8b244eed0fc872010788c19a12f8a87b (patch) | |
| tree | 28a9ceed45c8b4ea747222ccbfb2c4306b531e95 | |
| parent | 97e09b19d14528a216b502d46b3ea8090a1d1887 (diff) | |
math/rand math/bits dependency
| -rw-r--r-- | core/math/rand/rand_xoshiro256.odin | 12 |
1 files changed, 8 insertions, 4 deletions
diff --git a/core/math/rand/rand_xoshiro256.odin b/core/math/rand/rand_xoshiro256.odin index 7326ba8d5..6f5dbe545 100644 --- a/core/math/rand/rand_xoshiro256.odin +++ b/core/math/rand/rand_xoshiro256.odin @@ -3,8 +3,6 @@ package rand import "base:intrinsics" import "base:runtime" -import "core:math/bits" - /* The state for a xoshiro256** pseudorandom generator. */ @@ -17,7 +15,7 @@ xoshiro256_random_generator_proc :: proc(data: rawptr, mode: runtime.Random_Gene read_u64 :: proc "contextless" (r: ^Xoshiro256_Random_State) -> u64 { // xoshiro256** output function and state transition - result := bits.rotate_left64(r.s[1] * 5, 7) * 9 + result := rotate_left64(r.s[1] * 5, 7) * 9 t := r.s[1] << 17 r.s[2] = r.s[2] ~ r.s[0] @@ -25,9 +23,15 @@ xoshiro256_random_generator_proc :: proc(data: rawptr, mode: runtime.Random_Gene r.s[1] = r.s[1] ~ r.s[2] r.s[0] = r.s[0] ~ r.s[3] r.s[2] = r.s[2] ~ t - r.s[3] = bits.rotate_left64(r.s[3], 45) + r.s[3] = rotate_left64(r.s[3], 45) return result + + rotate_left64 :: proc "contextless" (x: u64, k: int) -> u64 { + n :: 64 + s := uint(k) & (n-1) + return x << s | x >> (n-s) + } } @(thread_local) |