From 5722b589e37c7df39fa63cfae3dcd1913798a158 Mon Sep 17 00:00:00 2001
From: "yu.dongliang" <18588496441@163.com>
Date: Mon, 2 Sep 2024 02:50:43 +0800
Subject: [PATCH] mat_mul_strassen()

---
 mat.c | 31 ++++++++++++++++++-------------
 1 file changed, 18 insertions(+), 13 deletions(-)

diff --git a/mat.c b/mat.c
index 91d572a..64c9f99 100644
--- a/mat.c
+++ b/mat.c
@@ -258,45 +258,50 @@ void mat_mul_strassen(mat_t* m, mat_t* m0, mat_t* m1, int n_min)
 	mat_mul_strassen(p3, t0, e, n_min);
 
 	mat_sub(u, p1,  p3);
-	mat_free(p1);
 
 	// p4 = d * (g - e)
-	mat_t* p4 = mat_alloc(0, 0, n, NULL);
+	mat_t* p4 = p1;
+	p1 = NULL;
+
 	mat_sub(t0, g,  e);
 	mat_mul_strassen(p4, d,  t0, n_min);
 	// t = p3 + p4
 	mat_add(t, p3,  p4);
-
 	mat_sub(r, p4,  p2);
-	mat_free(p2);
-	mat_free(p3);
-	mat_free(p4);
-
+//	mat_free(p2);
+//	mat_free(p3);
+//	mat_free(p4);
 
 	// tmp mat t1
-	mat_t* t1 = mat_alloc(0, 0, n, NULL);
+	mat_t* t1 = p2;
+	mat_t* p5 = p3;
+	mat_t* p6 = p4;
+	p2 = NULL;
+	p3 = NULL;
+	p4 = NULL;
 
 	//p5 = (a + d) * (e + h)
-	mat_t* p5 = mat_alloc(0, 0, n, NULL);
 	mat_add(t0, a,  d);
 	mat_add(t1, e,  h);
 	mat_mul_strassen(p5, t0, t1, n_min);
+
 	//p6 = (b - d) * (g + h)
-	mat_t* p6 = mat_alloc(0, 0, n, NULL);
 	mat_sub(t0, b,  d);
 	mat_add(t1, g,  h);
 	mat_mul_strassen(p6, t0, t1, n_min);
+
 	// r = p5 + p4 - p2 + p6
 	mat_add(r, r,   p5);
 	mat_add(r, r,   p6);
 
-	mat_free(p6);
-
 	//p7 = (a - c) * (e + f)
-	mat_t* p7 = mat_alloc(0, 0, n, NULL);
+	mat_t* p7 = p6;
+	p6 = NULL;
+
 	mat_sub(t0, a,  c);
 	mat_add(t1, e,  f);
 	mat_mul_strassen(p7, t0, t1, n_min);
+
 	// u = p5 + p1 -p3 -p7
 	mat_add(u, u,   p5);
 	mat_sub(u, u,   p7);
-- 
2.25.1