1 files changed, 39 insertions, 0 deletions
diff --git a/contrib/llvm-project/compiler-rt/lib/builtins/ashldi3.c b/contrib/llvm-project/compiler-rt/lib/builtins/ashldi3.c
new file mode 100644
index 000000000000..7b835da865d7
--- /dev/null
+++ b/contrib/llvm-project/compiler-rt/lib/builtins/ashldi3.c
@@ -0,0 +1,39 @@
+// ====-- ashldi3.c - Implement __ashldi3 ---------------------------------===//
+//
+// 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 __ashldi3 for the compiler_rt library.
+//
+//===----------------------------------------------------------------------===//
+
+#include "int_lib.h"
+
+// Returns: a << b
+
+// Precondition:  0 <= b < bits_in_dword
+
+COMPILER_RT_ABI di_int __ashldi3(di_int a, int b) {
+  const int bits_in_word = (int)(sizeof(si_int) * CHAR_BIT);
+  dwords input;
+  dwords result;
+  input.all = a;
+  if (b & bits_in_word) /* bits_in_word <= b < bits_in_dword */ {
+    result.s.low = 0;
+    result.s.high = input.s.low << (b - bits_in_word);
+  } else /* 0 <= b < bits_in_word */ {
+    if (b == 0)
+      return a;
+    result.s.low = input.s.low << b;
+    result.s.high =
+        ((su_int)input.s.high << b) | (input.s.low >> (bits_in_word - b));
+  }
+  return result.all;
+}
+
+#if defined(__ARM_EABI__)
+COMPILER_RT_ALIAS(__ashldi3, __aeabi_llsl)
+#endif