From ba66e109a89d5aff4d709cf0865da60d4d873fee Mon Sep 17 00:00:00 2001
From: txh18 <cloudygooseg@gmail.com>
Date: Wed, 27 May 2015 20:26:09 +0800
Subject: modified copy_from(d/h), copy_to(d/h)

---
 examples/cumatrix_from_mmatrix.lua | 13 +++++++++----
 matrix/generic/cumatrix.c          | 31 +++++++++++++++++++++++++++----
 2 files changed, 36 insertions(+), 8 deletions(-)

diff --git a/examples/cumatrix_from_mmatrix.lua b/examples/cumatrix_from_mmatrix.lua
index fba8a90..1aac1c4 100644
--- a/examples/cumatrix_from_mmatrix.lua
+++ b/examples/cumatrix_from_mmatrix.lua
@@ -1,5 +1,5 @@
-m = 10
-n = 10
+m = 3
+n = 4
 fm = nerv.MMatrixFloat(m, n)
 dm = nerv.MMatrixDouble(m, n)
 for i = 0, m - 1 do
@@ -15,9 +15,14 @@ print(dm)
 
 fc = nerv.CuMatrixFloat(m, n)
 dc = nerv.CuMatrixDouble(m, n)
-fc:copy_from(fm)
-dc:copy_from(dm)
+fc:copy_fromh(fm)
+dc:copy_fromh(dm)
+print("fc and dc")
 print(fc)
 print(dc)
+dc[1]:copy_tod(dc[0])
+print("dc[1] copied to dc[0]")
+print(dc)
+print("softmax of fc and dc")
 print(fc:softmax())
 print(dc:softmax())
diff --git a/matrix/generic/cumatrix.c b/matrix/generic/cumatrix.c
index 2b3b9d4..49e2620 100644
--- a/matrix/generic/cumatrix.c
+++ b/matrix/generic/cumatrix.c
@@ -169,9 +169,30 @@ static int nerv_matrix_(fill)(lua_State *L) {
     return 0;
 }
 
+static int nerv_matrix_(copy_fromd)(lua_State *L) { 
+    Matrix *a = luaT_checkudata(L, 1, nerv_matrix_(tname));
+    Matrix *b = luaT_checkudata(L, 2, nerv_matrix_(tname));
+    CHECK_SAME_DIMENSION(a, b);
+    cudaMemcpy2D(MATRIX_ELEM_PTR(a), a->stride,
+                MATRIX_ELEM_PTR(b), b->stride,
+                sizeof(MATRIX_ELEM) * b->ncol, b->nrow,
+                cudaMemcpyDeviceToDevice);
+    return 0;
+}
+
+static int nerv_matrix_(copy_tod)(lua_State *L) {
+    Matrix *a = luaT_checkudata(L, 1, nerv_matrix_(tname));
+    Matrix *b = luaT_checkudata(L, 2, nerv_matrix_(tname));
+    CHECK_SAME_DIMENSION(a, b);
+    cudaMemcpy2D(MATRIX_ELEM_PTR(b), b->stride,
+                MATRIX_ELEM_PTR(a), a->stride,
+                sizeof(MATRIX_ELEM) * a->ncol, a->nrow,
+                cudaMemcpyDeviceToDevice);
+    return 0;
+}
 
 extern const char *MATRIX_CUMATRIX_HOST_TNAME;
-static int nerv_matrix_(copy_from)(lua_State *L) {
+static int nerv_matrix_(copy_fromh)(lua_State *L) { 
     Matrix *a = luaT_checkudata(L, 1, nerv_matrix_(tname));
     Matrix *b = luaT_checkudata(L, 2, MATRIX_CUMATRIX_HOST_TNAME);
     CHECK_SAME_DIMENSION(a, b);
@@ -182,7 +203,7 @@ static int nerv_matrix_(copy_from)(lua_State *L) {
     return 0;
 }
 
-static int nerv_matrix_(copy_to)(lua_State *L) {
+static int nerv_matrix_(copy_toh)(lua_State *L) {
     Matrix *a = luaT_checkudata(L, 1, nerv_matrix_(tname));
     Matrix *b = luaT_checkudata(L, 2, MATRIX_CUMATRIX_HOST_TNAME);
     CHECK_SAME_DIMENSION(a, b);
@@ -215,8 +236,10 @@ static const luaL_Reg nerv_matrix_(extra_methods)[] = {
     {"colsum", nerv_matrix_(colsum)},
     {"rowsum", nerv_matrix_(rowsum)},
     {"rowmax", nerv_matrix_(rowmax)},
-    {"copy_from", nerv_matrix_(copy_from)},
-    {"copy_to", nerv_matrix_(copy_to)},
+    {"copy_fromh", nerv_matrix_(copy_fromh)},
+    {"copy_fromd", nerv_matrix_(copy_fromd)},
+    {"copy_toh", nerv_matrix_(copy_toh)},
+    {"copy_tod", nerv_matrix_(copy_tod)},
     {"trans", nerv_matrix_(trans)},
     /* in-place calc */
     {"add", nerv_matrix_(add)},
-- 
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