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Diffstat (limited to 'compiler-rt/lib/builtins/addvsi3.c')
-rw-r--r-- | compiler-rt/lib/builtins/addvsi3.c | 29 |
1 files changed, 29 insertions, 0 deletions
diff --git a/compiler-rt/lib/builtins/addvsi3.c b/compiler-rt/lib/builtins/addvsi3.c new file mode 100644 index 000000000000..40400237527b --- /dev/null +++ b/compiler-rt/lib/builtins/addvsi3.c @@ -0,0 +1,29 @@ +//===-- addvsi3.c - Implement __addvsi3 -----------------------------------===// +// +// 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 __addvsi3 for the compiler_rt library. +// +//===----------------------------------------------------------------------===// + +#include "int_lib.h" + +// Returns: a + b + +// Effects: aborts if a + b overflows + +COMPILER_RT_ABI si_int __addvsi3(si_int a, si_int b) { + si_int s = (su_int)a + (su_int)b; + if (b >= 0) { + if (s < a) + compilerrt_abort(); + } else { + if (s >= a) + compilerrt_abort(); + } + return s; +} |