Index: tests/validator/rewrite_nontemporals.c |
diff --git a/tests/validator/rewrite_nontemporals.c b/tests/validator/rewrite_nontemporals.c |
new file mode 100644 |
index 0000000000000000000000000000000000000000..e57cb228bfebfafe9ce0c80c9b9f53f8651bc737 |
--- /dev/null |
+++ b/tests/validator/rewrite_nontemporals.c |
@@ -0,0 +1,86 @@ |
+/* |
+ * Copyright 2016 The Native Client Authors. All rights reserved. |
+ * Use of this source code is governed by a BSD-style license that can be |
+ * found in the LICENSE file. |
+ */ |
+ |
+#include <string.h> |
+ |
+#include "native_client/src/include/nacl_assert.h" |
+ |
+char g_src[16]; |
+char g_dest[16]; |
+ |
+void reset_test_vars(void) { |
+ memset(g_src, 0xff, sizeof(g_src)); |
+ memset(g_dest, 0, sizeof(g_dest)); |
+} |
+ |
+#if defined(__x86_64__) |
+# define MEM_SUFFIX "(%%r15)" |
+#else |
+# define MEM_SUFFIX |
+#endif |
+ |
+/* |
+ * This test checks that non-temporal store instructions still have the |
+ * same effect after being rewritten to normal store instructions. |
+ */ |
+ |
+int main(void) { |
+ /* Test movntdq. */ |
+ reset_test_vars(); |
+ asm("movdqa g_src " MEM_SUFFIX ", %%xmm0\n" |
+ "movntdq %%xmm0, g_dest " MEM_SUFFIX "\n" : : : "xmm0"); |
+ ASSERT_EQ(memcmp(g_dest, g_src, 16), 0); |
+ |
+#if defined(__i386__) |
+ /* Test movntq. */ |
+ reset_test_vars(); |
+ asm("movq g_src, %%mm0\n" |
+ "movntq %%mm0, g_dest\n" : : : "mm0"); |
+ ASSERT_EQ(memcmp(g_dest, g_src, 8), 0); |
+#endif |
+ |
+#if defined(__x86_64__) |
+ /* Test movntps. */ |
+ reset_test_vars(); |
+ asm("movdqa g_src(%%r15), %%xmm0\n" |
+ "movntps %%xmm0, g_dest(%%r15)\n" : : : "xmm0"); |
+ ASSERT_EQ(memcmp(g_dest, g_src, 16), 0); |
+ |
+ /* Test movnti, using 32-bit operand. */ |
+ reset_test_vars(); |
+ asm("mov g_src(%%r15), %%eax\n" |
+ "movnti %%eax, g_dest(%%r15)\n" : : : "eax"); |
+ ASSERT_EQ(memcmp(g_dest, g_src, 4), 0); |
+ |
+ /* Test movnti, using 64-bit operand. */ |
+ reset_test_vars(); |
+ asm("mov g_src(%%r15), %%rax\n" |
+ "movnti %%rax, g_dest(%%r15)\n" : : : "rax"); |
+ ASSERT_EQ(memcmp(g_dest, g_src, 8), 0); |
+ |
+ /* Test movnti, using a destination with a restricted register. */ |
+ reset_test_vars(); |
+ asm("mov g_src(%%r15), %%rax\n" |
+ ".p2align 5\n" /* Ensure following instructions are in the same bundle */ |
+ "leal g_dest, %%ecx\n" |
+ "movnti %%rax, (%%r15, %%rcx)\n" : : : "rax", "rcx"); |
+ ASSERT_EQ(memcmp(g_dest, g_src, 4), 0); |
+ |
+ /* |
+ * Test movnti, using a destination with RIP-relative addressing, |
+ * which is sensitive to the address of the instruction. |
+ */ |
+ reset_test_vars(); |
+ asm("mov g_src(%%r15), %%rax\n" |
+ "movnti %%rax, g_dest(%%rip)\n" : : : "rax"); |
+ ASSERT_EQ(memcmp(g_dest, g_src, 8), 0); |
+ |
+ /* Test prefetchnta. This has no side effects that we can test for. */ |
+ asm("prefetchnta g_dest(%r15)\n"); |
+#endif |
+ |
+ return 0; |
+} |