1*3cab2bb3Spatrick //===-- lib/subtf3.c - Quad-precision subtraction -----------------*- C -*-===// 2*3cab2bb3Spatrick // 3*3cab2bb3Spatrick // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 4*3cab2bb3Spatrick // See https://llvm.org/LICENSE.txt for license information. 5*3cab2bb3Spatrick // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 6*3cab2bb3Spatrick // 7*3cab2bb3Spatrick //===----------------------------------------------------------------------===// 8*3cab2bb3Spatrick // 9*3cab2bb3Spatrick // This file implements quad-precision soft-float subtraction. 10*3cab2bb3Spatrick // 11*3cab2bb3Spatrick //===----------------------------------------------------------------------===// 12*3cab2bb3Spatrick 13*3cab2bb3Spatrick #define QUAD_PRECISION 14*3cab2bb3Spatrick #include "fp_lib.h" 15*3cab2bb3Spatrick 16*3cab2bb3Spatrick #if defined(CRT_HAS_128BIT) && defined(CRT_LDBL_128BIT) 17*3cab2bb3Spatrick COMPILER_RT_ABI fp_t __addtf3(fp_t a, fp_t b); 18*3cab2bb3Spatrick 19*3cab2bb3Spatrick // Subtraction; flip the sign bit of b and add. __subtf3(fp_t a,fp_t b)20*3cab2bb3SpatrickCOMPILER_RT_ABI fp_t __subtf3(fp_t a, fp_t b) { 21*3cab2bb3Spatrick return __addtf3(a, fromRep(toRep(b) ^ signBit)); 22*3cab2bb3Spatrick } 23*3cab2bb3Spatrick 24*3cab2bb3Spatrick #endif 25