1//===-- lib/subtf3.c - Quad-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 quad-precision soft-float subtraction with the 11// IEEE-754 default rounding (to nearest, ties to even). 12// 13//===----------------------------------------------------------------------===// 14 15#define QUAD_PRECISION 16#include "fp_lib.h" 17 18#if defined(CRT_HAS_128BIT) && defined(CRT_LDBL_128BIT) 19COMPILER_RT_ABI fp_t __addtf3(fp_t a, fp_t b); 20 21// Subtraction; flip the sign bit of b and add. 22COMPILER_RT_ABI fp_t 23__subtf3(fp_t a, fp_t b) { 24 return __addtf3(a, fromRep(toRep(b) ^ signBit)); 25} 26 27#endif 28