1*0b57cec5SDimitry Andric //===-- lib/subtf3.c - Quad-precision subtraction -----------------*- C -*-===// 2*0b57cec5SDimitry Andric // 3*0b57cec5SDimitry Andric // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 4*0b57cec5SDimitry Andric // See https://llvm.org/LICENSE.txt for license information. 5*0b57cec5SDimitry Andric // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 6*0b57cec5SDimitry Andric // 7*0b57cec5SDimitry Andric //===----------------------------------------------------------------------===// 8*0b57cec5SDimitry Andric // 9*0b57cec5SDimitry Andric // This file implements quad-precision soft-float subtraction with the 10*0b57cec5SDimitry Andric // IEEE-754 default rounding (to nearest, ties to even). 11*0b57cec5SDimitry Andric // 12*0b57cec5SDimitry Andric //===----------------------------------------------------------------------===// 13*0b57cec5SDimitry Andric 14*0b57cec5SDimitry Andric #define QUAD_PRECISION 15*0b57cec5SDimitry Andric #include "fp_lib.h" 16*0b57cec5SDimitry Andric 17*0b57cec5SDimitry Andric #if defined(CRT_HAS_128BIT) && defined(CRT_LDBL_128BIT) 18*0b57cec5SDimitry Andric COMPILER_RT_ABI fp_t __addtf3(fp_t a, fp_t b); 19*0b57cec5SDimitry Andric 20*0b57cec5SDimitry Andric // Subtraction; flip the sign bit of b and add. 21*0b57cec5SDimitry Andric COMPILER_RT_ABI fp_t __subtf3(fp_t a, fp_t b) { 22*0b57cec5SDimitry Andric return __addtf3(a, fromRep(toRep(b) ^ signBit)); 23*0b57cec5SDimitry Andric } 24*0b57cec5SDimitry Andric 25*0b57cec5SDimitry Andric #endif 26