subdf3.c revision 222656
1//===-- lib/adddf3.c - Double-precision subtraction ---------------*- C -*-===// 2// 3// The LLVM Compiler Infrastructure 4// 5// This file is dual licensed under the MIT and the University of Illinois Open 6// Source Licenses. See LICENSE.TXT for details. 7// 8//===----------------------------------------------------------------------===// 9// 10// This file implements double-precision soft-float subtraction with the 11// IEEE-754 default rounding (to nearest, ties to even). 12// 13//===----------------------------------------------------------------------===// 14#include "abi.h" 15 16#define DOUBLE_PRECISION 17#include "fp_lib.h" 18 19fp_t COMPILER_RT_ABI __adddf3(fp_t a, fp_t b); 20 21 22ARM_EABI_FNALIAS(dsub, subdf3); 23 24// Subtraction; flip the sign bit of b and add. 25COMPILER_RT_ABI fp_t 26__subdf3(fp_t a, fp_t b) { 27 return __adddf3(a, fromRep(toRep(b) ^ signBit)); 28} 29 30/* FIXME: rsub for ARM EABI */ 31