Merge pull request #10502 from ydb-platform/mergelibs-241016-1210

Library import 241016-1210

1 files changed, 17 insertions, 53 deletions

diff --git a/contrib/libs/cxxsupp/builtins/mulosi4.c b/contrib/libs/cxxsupp/builtins/mulosi4.c
index 422528085c..4e03c24455 100644
--- a/contrib/libs/cxxsupp/builtins/mulosi4.c
+++ b/contrib/libs/cxxsupp/builtins/mulosi4.c
@@ -1,58 +1,22 @@
-/*===-- 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.
- *
- * ===----------------------------------------------------------------------===
- */
+//===-- mulosi4.c - Implement __mulosi4 -----------------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+//
+// This file implements __mulosi4 for the compiler_rt library.
+//
+//===----------------------------------------------------------------------===//
 
-#include "int_lib.h"
+#define fixint_t si_int
+#include "int_mulo_impl.inc"
 
-/* Returns: a * b */
+// Returns: a * b
 
-/* Effects: sets *overflow to 1  if a * b overflows */
+// Effects: sets *overflow to 1  if a * b overflows
 
-COMPILER_RT_ABI 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;
+COMPILER_RT_ABI si_int __mulosi4(si_int a, si_int b, int *overflow) {
+  return __muloXi4(a, b, overflow);
 }