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-exception 6// 7//===----------------------------------------------------------------------===// 8// 9// This file implements double-precision soft-float subtraction. 10// 11//===----------------------------------------------------------------------===// 12 13#define DOUBLE_PRECISION 14#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#else 25COMPILER_RT_ALIAS(__subdf3, __aeabi_dsub) 26#endif 27#endif 28