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. 10 // 11 //===----------------------------------------------------------------------===// 12 13 #define QUAD_PRECISION 14 #include "fp_lib.h" 15 16 #if defined(CRT_HAS_128BIT) && defined(CRT_LDBL_128BIT) 17 COMPILER_RT_ABI fp_t __addtf3(fp_t a, fp_t b); 18 19 // Subtraction; flip the sign bit of b and add. 20 COMPILER_RT_ABI fp_t __subtf3(fp_t a, fp_t b) { 21 return __addtf3(a, fromRep(toRep(b) ^ signBit)); 22 } 23 24 #endif 25