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-rw-r--r--contrib/compiler-rt/lib/absvti2.c34
1 files changed, 34 insertions, 0 deletions
diff --git a/contrib/compiler-rt/lib/absvti2.c b/contrib/compiler-rt/lib/absvti2.c
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+++ b/contrib/compiler-rt/lib/absvti2.c
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+/* ===-- absvti2.c - Implement __absvdi2 -----------------------------------===
+ *
+ * The LLVM Compiler Infrastructure
+ *
+ * This file is dual licensed under the MIT and the University of Illinois Open
+ * Source Licenses. See LICENSE.TXT for details.
+ *
+ * ===----------------------------------------------------------------------===
+ *
+ * This file implements __absvti2 for the compiler_rt library.
+ *
+ * ===----------------------------------------------------------------------===
+ */
+
+#include "int_lib.h"
+
+#ifdef CRT_HAS_128BIT
+
+/* Returns: absolute value */
+
+/* Effects: aborts if abs(x) < 0 */
+
+ti_int
+__absvti2(ti_int a)
+{
+ const int N = (int)(sizeof(ti_int) * CHAR_BIT);
+ if (a == ((ti_int)1 << (N-1)))
+ compilerrt_abort();
+ const ti_int s = a >> (N - 1);
+ return (a ^ s) - s;
+}
+
+#endif /* CRT_HAS_128BIT */
+