diff options
Diffstat (limited to 'contrib/llvm-project/compiler-rt/lib/builtins/subtf3.c')
| -rw-r--r-- | contrib/llvm-project/compiler-rt/lib/builtins/subtf3.c | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/contrib/llvm-project/compiler-rt/lib/builtins/subtf3.c b/contrib/llvm-project/compiler-rt/lib/builtins/subtf3.c new file mode 100644 index 000000000000..c96814692d2c --- /dev/null +++ b/contrib/llvm-project/compiler-rt/lib/builtins/subtf3.c @@ -0,0 +1,25 @@ +//===-- lib/subtf3.c - Quad-precision subtraction -----------------*- C -*-===// +// +// 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 quad-precision soft-float subtraction with the +// IEEE-754 default rounding (to nearest, ties to even). +// +//===----------------------------------------------------------------------===// + +#define QUAD_PRECISION +#include "fp_lib.h" + +#if defined(CRT_HAS_128BIT) && defined(CRT_LDBL_128BIT) +COMPILER_RT_ABI fp_t __addtf3(fp_t a, fp_t b); + +// Subtraction; flip the sign bit of b and add. +COMPILER_RT_ABI fp_t __subtf3(fp_t a, fp_t b) { + return __addtf3(a, fromRep(toRep(b) ^ signBit)); +} + +#endif |