1*0a6a1f1dSLionel Sambuc //===-- lib/subtf3.c - Quad-precision subtraction -----------------*- C -*-===// 2*0a6a1f1dSLionel Sambuc // 3*0a6a1f1dSLionel Sambuc // The LLVM Compiler Infrastructure 4*0a6a1f1dSLionel Sambuc // 5*0a6a1f1dSLionel Sambuc // This file is dual licensed under the MIT and the University of Illinois Open 6*0a6a1f1dSLionel Sambuc // Source Licenses. See LICENSE.TXT for details. 7*0a6a1f1dSLionel Sambuc // 8*0a6a1f1dSLionel Sambuc //===----------------------------------------------------------------------===// 9*0a6a1f1dSLionel Sambuc // 10*0a6a1f1dSLionel Sambuc // This file implements quad-precision soft-float subtraction with the 11*0a6a1f1dSLionel Sambuc // IEEE-754 default rounding (to nearest, ties to even). 12*0a6a1f1dSLionel Sambuc // 13*0a6a1f1dSLionel Sambuc //===----------------------------------------------------------------------===// 14*0a6a1f1dSLionel Sambuc 15*0a6a1f1dSLionel Sambuc #define QUAD_PRECISION 16*0a6a1f1dSLionel Sambuc #include "fp_lib.h" 17*0a6a1f1dSLionel Sambuc 18*0a6a1f1dSLionel Sambuc #if defined(CRT_HAS_128BIT) && defined(CRT_LDBL_128BIT) 19*0a6a1f1dSLionel Sambuc COMPILER_RT_ABI fp_t __addtf3(fp_t a, fp_t b); 20*0a6a1f1dSLionel Sambuc 21*0a6a1f1dSLionel Sambuc // Subtraction; flip the sign bit of b and add. 22*0a6a1f1dSLionel Sambuc COMPILER_RT_ABI fp_t __subtf3(fp_t a,fp_t b)23*0a6a1f1dSLionel Sambuc__subtf3(fp_t a, fp_t b) { 24*0a6a1f1dSLionel Sambuc return __addtf3(a, fromRep(toRep(b) ^ signBit)); 25*0a6a1f1dSLionel Sambuc } 26*0a6a1f1dSLionel Sambuc 27*0a6a1f1dSLionel Sambuc #endif 28