From 41182081f4f9c863222c9fd2645868de8abbbfe6 Mon Sep 17 00:00:00 2001
From: tooomm <tooomm@users.noreply.github.com>
Date: Sun, 17 May 2026 14:15:46 +0200
Subject: [PATCH] Update SFMT to v1.5.4

---
 .../libcockatrice/rng/sfmt/SFMT.c             |  4 +++-
 .../libcockatrice/rng/sfmt/SFMT.h             | 21 ++++++++++++++++---
 2 files changed, 21 insertions(+), 4 deletions(-)

diff --git a/libcockatrice_rng/libcockatrice/rng/sfmt/SFMT.c b/libcockatrice_rng/libcockatrice/rng/sfmt/SFMT.c
index b4ac9308b..fde6367a0 100644
--- a/libcockatrice_rng/libcockatrice/rng/sfmt/SFMT.c
+++ b/libcockatrice_rng/libcockatrice/rng/sfmt/SFMT.c
@@ -60,7 +60,9 @@ inline static void swap(w128_t *array, int size);
  */
   static const w128_t sse2_param_mask = {{SFMT_MSK1, SFMT_MSK2,
                                           SFMT_MSK3, SFMT_MSK4}};
-  #if defined(_MSC_VER)
+  #if defined(__AVX2__) && (SFMT_SL1 >= 16) && !(SFMT_N & 1) && !(SFMT_POS1 & 1)
+    #include "SFMT-avx256.h"
+  #elif defined(_MSC_VER)
     #include "SFMT-sse2-msc.h"
   #else
     #include "SFMT-sse2.h"
diff --git a/libcockatrice_rng/libcockatrice/rng/sfmt/SFMT.h b/libcockatrice_rng/libcockatrice/rng/sfmt/SFMT.h
index 79e012d63..34d9e746f 100644
--- a/libcockatrice_rng/libcockatrice/rng/sfmt/SFMT.h
+++ b/libcockatrice_rng/libcockatrice/rng/sfmt/SFMT.h
@@ -88,8 +88,13 @@ union W128_T {
     uint64_t u64[2];
     uint32x4_t si;
 };
+//#elif defined(HAVE_SSE2)
 #elif defined(HAVE_SSE2)
-  #include <emmintrin.h>
+  #if defined(__AVX2__)
+    #include <immintrin.h>
+  #else 
+    #include <emmintrin.h>
+  #endif
 
 /** 128-bit data structure */
 union W128_T {
@@ -112,8 +117,18 @@ typedef union W128_T w128_t;
  * SFMT internal state
  */
 struct SFMT_T {
+#if defined(__AVX2__)
+    union {
+        w128_t state[SFMT_N];
+        __m256i state_ymm[SFMT_N/2];
+    #if defined(__AVX512VL__)
+        __m512i state_zmm[SFMT_N/4];
+    #endif
+    };
+#else
     /** the 128-bit internal state array */
     w128_t state[SFMT_N];
+#endif
     /** index counter to the 32-bit internal state array */
     int idx;
 };
@@ -249,9 +264,9 @@ inline static double sfmt_genrand_real3(sfmt_t * sfmt)
 }
 
 /**
- * converts an unsigned 32-bit integer to double on [0,1)
+ * converts an unsigned 64-bit integer to double on [0,1)
  * with 53-bit resolution.
- * @param v 32-bit unsigned integer
+ * @param v 64-bit unsigned integer
  * @return double on [0,1)-real-interval with 53-bit resolution.
  */
 inline static double sfmt_to_res53(uint64_t v)