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1//===-- lib/adddf3.c - Double-precision subtraction ---------------*- C -*-===//2//3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.4// See https://llvm.org/LICENSE.txt for license information.5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception6//7//===----------------------------------------------------------------------===//8//9// This file implements double-precision soft-float subtraction.10//11//===----------------------------------------------------------------------===//12 13#define DOUBLE_PRECISION14#include "fp_lib.h"15 16// Subtraction; flip the sign bit of b and add.17COMPILER_RT_ABI fp_t __subdf3(fp_t a, fp_t b) {18 return __adddf3(a, fromRep(toRep(b) ^ signBit));19}20 21#if defined(__ARM_EABI__)22#if defined(COMPILER_RT_ARMHF_TARGET)23AEABI_RTABI fp_t __aeabi_dsub(fp_t a, fp_t b) { return __subdf3(a, b); }24#else25COMPILER_RT_ALIAS(__subdf3, __aeabi_dsub)26#endif27#endif28