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