1 //===-- lib/subtf3.c - Quad-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 quad-precision soft-float subtraction with the 10 // IEEE-754 default rounding (to nearest, ties to even). 11 // 12 //===----------------------------------------------------------------------===// 13 14 #define QUAD_PRECISION 15 #include "fp_lib.h" 16 17 #if defined(CRT_HAS_128BIT) && defined(CRT_LDBL_128BIT) 18 COMPILER_RT_ABI fp_t __addtf3(fp_t a, fp_t b); 19 20 // Subtraction; flip the sign bit of b and add. 21 COMPILER_RT_ABI fp_t __subtf3(fp_t a, fp_t b) { 22 return __addtf3(a, fromRep(toRep(b) ^ signBit)); 23 } 24 25 #endif 26