1 //===-- lib/subsf3.c - Single-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 single-precision soft-float subtraction with the 11 // IEEE-754 default rounding (to nearest, ties to even). 12 // 13 //===----------------------------------------------------------------------===// 14 15 #define SINGLE_PRECISION 16 #include "fp_lib.h" 17 18 // Subtraction; flip the sign bit of b and add. 19 COMPILER_RT_ABI fp_t __subsf3(fp_t a,fp_t b)20__subsf3(fp_t a, fp_t b) { 21 return __addsf3(a, fromRep(toRep(b) ^ signBit)); 22 } 23 24 #if defined(__ARM_EABI__) 25 #if defined(COMPILER_RT_ARMHF_TARGET) __aeabi_fsub(fp_t a,fp_t b)26AEABI_RTABI fp_t __aeabi_fsub(fp_t a, fp_t b) { 27 return __subsf3(a, b); 28 } 29 #else 30 AEABI_RTABI fp_t __aeabi_fsub(fp_t a, fp_t b) COMPILER_RT_ALIAS(__subsf3); 31 #endif 32 #endif 33