Daily update on 20250721-223448 by Nitload Youmu. Additional Message : Rename StgSHarp.C to StgSharp.Native. Add SDL to repo.

Signed-off-by: Nitload <YoumuLiu_NSI@whv0t.onmicrosoft.com>
2025-07-21 22:34:48 +08:00
parent c624a8ca38
commit 28ea5d1d1e
1215 changed files with 628924 additions and 114 deletions
@@ -0,0 +1,23 @@
+#include "ssc_internal.h"
+#include "ssc_intrinsic.h"
+
+INTERNAL __m128i facIncrement = { 4, 4, 4, 4 };
+INTERNAL __m128i facBase = { 1, 2, 3, 4 };
+
+INTERNAL uint64_t SSCDECL factorial_simd_sse(int n)
+{
+        __m128i baseResult = facBase;
+        __m128i facBaseLocal = facBase;
+        const int cycle = (n - 3) >> 2;
+        const uint32_t rest = (cycle << 2) + 1;
+        for (size_t i = 0; i < cycle; i++) {
+                facBaseLocal = _mm_add_epi32(facBaseLocal, facIncrement);
+                baseResult = _mm_mullo_epi32(baseResult, facBaseLocal);
+        }
+        uint64_t result = (uint64_t)baseResult.m128i_i32[0] * (uint64_t)baseResult.m128i_i32[1] *
+                          (uint64_t)baseResult.m128i_i32[2] * (uint64_t)baseResult.m128i_i32[3];
+        for (uint64_t i = rest; i < n; i++) {
+                result *= i ;
+        }
+        return result;
+}