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Diffstat (limited to 'compiler-rt/lib/builtins/cmpdi2.c')
| -rw-r--r-- | compiler-rt/lib/builtins/cmpdi2.c | 42 |
1 files changed, 42 insertions, 0 deletions
diff --git a/compiler-rt/lib/builtins/cmpdi2.c b/compiler-rt/lib/builtins/cmpdi2.c new file mode 100644 index 000000000000..951db85b5062 --- /dev/null +++ b/compiler-rt/lib/builtins/cmpdi2.c @@ -0,0 +1,42 @@ +//===-- cmpdi2.c - Implement __cmpdi2 -------------------------------------===// +// +// 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 __cmpdi2 for the compiler_rt library. +// +//===----------------------------------------------------------------------===// + +#include "int_lib.h" + +// Returns: if (a < b) returns 0 +// if (a == b) returns 1 +// if (a > b) returns 2 + +COMPILER_RT_ABI si_int __cmpdi2(di_int a, di_int b) { + dwords x; + x.all = a; + dwords y; + y.all = b; + if (x.s.high < y.s.high) + return 0; + if (x.s.high > y.s.high) + return 2; + if (x.s.low < y.s.low) + return 0; + if (x.s.low > y.s.low) + return 2; + return 1; +} + +#ifdef __ARM_EABI__ +// Returns: if (a < b) returns -1 +// if (a == b) returns 0 +// if (a > b) returns 1 +COMPILER_RT_ABI si_int __aeabi_lcmp(di_int a, di_int b) { + return __cmpdi2(a, b) - 1; +} +#endif |