1*61e3637bSjoerg //===-- lib/subtf3.c - Quad-precision subtraction -----------------*- C -*-===// 2*61e3637bSjoerg // 3*61e3637bSjoerg // The LLVM Compiler Infrastructure 4*61e3637bSjoerg // 5*61e3637bSjoerg // This file is dual licensed under the MIT and the University of Illinois Open 6*61e3637bSjoerg // Source Licenses. See LICENSE.TXT for details. 7*61e3637bSjoerg // 8*61e3637bSjoerg //===----------------------------------------------------------------------===// 9*61e3637bSjoerg // 10*61e3637bSjoerg // This file implements quad-precision soft-float subtraction with the 11*61e3637bSjoerg // IEEE-754 default rounding (to nearest, ties to even). 12*61e3637bSjoerg // 13*61e3637bSjoerg //===----------------------------------------------------------------------===// 14*61e3637bSjoerg 15*61e3637bSjoerg #define QUAD_PRECISION 16*61e3637bSjoerg #include "fp_lib.h" 17*61e3637bSjoerg 18*61e3637bSjoerg #if defined(CRT_HAS_128BIT) && defined(CRT_LDBL_128BIT) 19*61e3637bSjoerg COMPILER_RT_ABI fp_t __addtf3(fp_t a, fp_t b); 20*61e3637bSjoerg 21*61e3637bSjoerg // Subtraction; flip the sign bit of b and add. 22*61e3637bSjoerg COMPILER_RT_ABI fp_t __subtf3(fp_t a,fp_t b)23*61e3637bSjoerg__subtf3(fp_t a, fp_t b) { 24*61e3637bSjoerg return __addtf3(a, fromRep(toRep(b) ^ signBit)); 25*61e3637bSjoerg } 26*61e3637bSjoerg 27*61e3637bSjoerg #endif 28