add memcpy test

3 files changed, 138 insertions, 1 deletions

diff --git a/tests/core/test_memcpy3.c b/tests/core/test_memcpy3.c
new file mode 100644
index 00000000..1bf47be6
--- /dev/null
+++ b/tests/core/test_memcpy3.c
@@ -0,0 +1,51 @@
+#include <stdio.h>
+#include <string.h>
+#include <assert.h>
+
+#define TOTAL 10240
+
+#define TEST(size, type) { \
+  for (int i = 0; i < TOTAL; i++) { \
+    buffer[i] = i*seed; \
+  } \
+  memcpy(buffer, buffer+size+1, size*sizeof(type)); \
+  int v = 0; \
+  for (int i = 0; i < TOTAL; i++) { \
+    v += buffer[i]; \
+  } \
+  printf("final %d:%d\n", size, v); \
+}
+
+int main() {
+  #define RUN(type) \
+  { \
+    type buffer[TOTAL]; \
+    volatile int seed = 123; \
+    TEST(1, type); \
+    TEST(2, type); \
+    TEST(3, type); \
+    TEST(4, type); \
+    TEST(5, type); \
+    TEST(6, type); \
+    TEST(7, type); \
+    TEST(8, type); \
+    TEST(9, type); \
+    TEST(10, type); \
+    TEST(16, type); \
+    TEST(32, type); \
+    TEST(64, type); \
+    TEST(128, type); \
+    TEST(256, type); \
+    TEST(512, type); \
+    TEST(1024, type); \
+    for (int x = 10; x < 100; x += 10) { TEST(x, type) }; \
+  }
+  printf("8\n");
+  RUN(unsigned char);
+  printf("16\n");
+  RUN(unsigned short);
+  printf("32\n");
+  RUN(unsigned);
+  return 1;
+}
+
diff --git a/tests/core/test_memcpy3.out b/tests/core/test_memcpy3.out
new file mode 100644
index 00000000..6f39e709
--- /dev/null
+++ b/tests/core/test_memcpy3.out
@@ -0,0 +1,81 @@
+8
+final 1:1305846
+final 2:1305826
+final 3:1305796
+final 4:1305756
+final 5:1305706
+final 6:1305646
+final 7:1305576
+final 8:1305496
+final 9:1305406
+final 10:1305306
+final 16:1305264
+final 32:1305696
+final 64:1305024
+final 128:1305728
+final 256:1305600
+final 512:1305600
+final 1024:1305600
+final 10:1305306
+final 20:1305548
+final 30:1305814
+final 40:1305336
+final 50:1305906
+final 60:1305476
+final 70:1305582
+final 80:1305712
+final 90:1304842
+16
+final 1:332555510
+final 2:332556002
+final 3:332556740
+final 4:332557724
+final 5:332558954
+final 6:332560430
+final 7:332562152
+final 8:332564120
+final 9:332566334
+final 10:332568794
+final 16:332588720
+final 32:332685152
+final 64:333066944
+final 128:334586240
+final 256:340647680
+final 512:332618240
+final 1024:332812288
+final 10:332568794
+final 20:332606924
+final 30:332669654
+final 40:332756984
+final 50:332868914
+final 60:333005444
+final 70:333166574
+final 80:333352304
+final 90:333562634
+32
+final 1:-2141821706
+final 2:-2141821214
+final 3:-2141820476
+final 4:-2141819492
+final 5:-2141818262
+final 6:-2141816786
+final 7:-2141815064
+final 8:-2141813096
+final 9:-2141810882
+final 10:-2141808422
+final 16:-2141788496
+final 32:-2141692064
+final 64:-2141310272
+final 128:-2139790976
+final 256:-2133729536
+final 512:-2109515264
+final 1024:-2012721152
+final 10:-2141808422
+final 20:-2141770292
+final 30:-2141707562
+final 40:-2141620232
+final 50:-2141508302
+final 60:-2141371772
+final 70:-2141210642
+final 80:-2141024912
+final 90:-2140814582
diff --git a/tests/test_core.py b/tests/test_core.py
index fd8d18fe..55aeb697 100644
--- a/tests/test_core.py
+++ b/tests/test_core.py
@@ -2071,7 +2071,6 @@ def process(filename):
 
   def test_bigswitch(self):
     if self.run_name != 'default': return self.skip('TODO: issue #781')
-
     src = open(path_from_root('tests', 'bigswitch.cpp')).read()
     self.do_run(src, '''34962: GL_ARRAY_BUFFER (0x8892)
 26214: what?
@@ -2589,6 +2588,12 @@ The current type of b is: 9
 
       self.do_run_from_file(src, output)
 
+  def test_memcpy3(self):
+    if Settings.USE_TYPED_ARRAYS != 2: return self.skip('need ta2')
+    test_path = path_from_root('tests', 'core', 'test_memcpy3')
+    src, output = (test_path + s for s in ('.c', '.out'))
+    self.do_run_from_file(src, output)
+
   def test_getopt(self):
       if self.emcc_args is None: return self.skip('needs emcc for libc')