1 files changed, 51 insertions, 0 deletions
diff --git a/SingleSource/Regression/C/gcc-c-torture/execute/bswap-1.c b/SingleSource/Regression/C/gcc-c-torture/execute/bswap-1.c
new file mode 100644
index 00000000..ff80c055
--- /dev/null
+++ b/SingleSource/Regression/C/gcc-c-torture/execute/bswap-1.c
@@ -0,0 +1,51 @@
+/* Test __builtin_bswap64 . */
+
+unsigned long long g(unsigned long long a) __attribute__((noinline));
+unsigned long long g(unsigned long long a)
+{
+  return __builtin_bswap64(a);
+}
+
+
+unsigned long long f(unsigned long long c)
+{
+  union {
+    unsigned long long a;
+    unsigned char b[8];
+  } a, b;
+  a.a = c;
+  b.b[0] = a.b[7];
+  b.b[1] = a.b[6];
+  b.b[2] = a.b[5];
+  b.b[3] = a.b[4];
+  b.b[4] = a.b[3];
+  b.b[5] = a.b[2];
+  b.b[6] = a.b[1];
+  b.b[7] = a.b[0];
+  return b.a;
+}
+
+int main(void)
+{
+  unsigned long long i;
+  /* The rest of the testcase assumes 8 byte long long. */
+  if (sizeof(i) != sizeof(char)*8)
+    return 0;
+  if (f(0x12) != g(0x12))
+    __builtin_abort();
+  if (f(0x1234) != g(0x1234))
+    __builtin_abort();
+  if (f(0x123456) != g(0x123456))
+    __builtin_abort();
+  if (f(0x12345678ull) != g(0x12345678ull))
+    __builtin_abort();
+  if (f(0x1234567890ull) != g(0x1234567890ull))
+    __builtin_abort();
+  if (f(0x123456789012ull) != g(0x123456789012ull))
+    __builtin_abort();
+  if (f(0x12345678901234ull) != g(0x12345678901234ull))
+    __builtin_abort();
+  if (f(0x1234567890123456ull) != g(0x1234567890123456ull))
+    __builtin_abort();
+  return 0;
+}