1276789Sdim//===-- lib/adddf3.c - Double-precision subtraction ---------------*- C -*-===//
2276789Sdim//
3353358Sdim// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4353358Sdim// See https://llvm.org/LICENSE.txt for license information.
5353358Sdim// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6276789Sdim//
7276789Sdim//===----------------------------------------------------------------------===//
8276789Sdim//
9360784Sdim// This file implements double-precision soft-float subtraction.
10276789Sdim//
11276789Sdim//===----------------------------------------------------------------------===//
12276789Sdim
13276789Sdim#define DOUBLE_PRECISION
14276789Sdim#include "fp_lib.h"
15276789Sdim
16276789Sdim// Subtraction; flip the sign bit of b and add.
17353358SdimCOMPILER_RT_ABI fp_t __subdf3(fp_t a, fp_t b) {
18353358Sdim  return __adddf3(a, fromRep(toRep(b) ^ signBit));
19276789Sdim}
20276789Sdim
21321369Sdim#if defined(__ARM_EABI__)
22327952Sdim#if defined(COMPILER_RT_ARMHF_TARGET)
23353358SdimAEABI_RTABI fp_t __aeabi_dsub(fp_t a, fp_t b) { return __subdf3(a, b); }
24327952Sdim#else
25353358SdimCOMPILER_RT_ALIAS(__subdf3, __aeabi_dsub)
26321369Sdim#endif
27327952Sdim#endif
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