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Diffstat (limited to 'compiler-rt/lib/builtins/addvti3.c')
-rw-r--r-- | compiler-rt/lib/builtins/addvti3.c | 33 |
1 files changed, 33 insertions, 0 deletions
diff --git a/compiler-rt/lib/builtins/addvti3.c b/compiler-rt/lib/builtins/addvti3.c new file mode 100644 index 000000000000..aa709875d243 --- /dev/null +++ b/compiler-rt/lib/builtins/addvti3.c @@ -0,0 +1,33 @@ +//===-- addvti3.c - Implement __addvti3 -----------------------------------===// +// +// 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 __addvti3 for the compiler_rt library. +// +//===----------------------------------------------------------------------===// + +#include "int_lib.h" + +#ifdef CRT_HAS_128BIT + +// Returns: a + b + +// Effects: aborts if a + b overflows + +COMPILER_RT_ABI ti_int __addvti3(ti_int a, ti_int b) { + ti_int s = (tu_int)a + (tu_int)b; + if (b >= 0) { + if (s < a) + compilerrt_abort(); + } else { + if (s >= a) + compilerrt_abort(); + } + return s; +} + +#endif // CRT_HAS_128BIT |