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-rw-r--r--lib/mulosi4.c58
1 files changed, 0 insertions, 58 deletions
diff --git a/lib/mulosi4.c b/lib/mulosi4.c
deleted file mode 100644
index f3398d1fc7bd..000000000000
--- a/lib/mulosi4.c
+++ /dev/null
@@ -1,58 +0,0 @@
-/*===-- mulosi4.c - Implement __mulosi4 -----------------------------------===
- *
- * 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 __mulosi4 for the compiler_rt library.
- *
- * ===----------------------------------------------------------------------===
- */
-
-#include "int_lib.h"
-
-/* Returns: a * b */
-
-/* Effects: sets *overflow to 1 if a * b overflows */
-
-si_int
-__mulosi4(si_int a, si_int b, int* overflow)
-{
- const int N = (int)(sizeof(si_int) * CHAR_BIT);
- const si_int MIN = (si_int)1 << (N-1);
- const si_int MAX = ~MIN;
- *overflow = 0;
- si_int result = a * b;
- if (a == MIN)
- {
- if (b != 0 && b != 1)
- *overflow = 1;
- return result;
- }
- if (b == MIN)
- {
- if (a != 0 && a != 1)
- *overflow = 1;
- return result;
- }
- si_int sa = a >> (N - 1);
- si_int abs_a = (a ^ sa) - sa;
- si_int sb = b >> (N - 1);
- si_int abs_b = (b ^ sb) - sb;
- if (abs_a < 2 || abs_b < 2)
- return result;
- if (sa == sb)
- {
- if (abs_a > MAX / abs_b)
- *overflow = 1;
- }
- else
- {
- if (abs_a > MIN / -abs_b)
- *overflow = 1;
- }
- return result;
-}