1 //===-- lib/adddf3.c - Double-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 double-precision soft-float subtraction with the 11 // IEEE-754 default rounding (to nearest, ties to even). 12 // 13 //===----------------------------------------------------------------------===// 14 15 #define DOUBLE_PRECISION 16 #include "fp_lib.h" 17 18 // Subtraction; flip the sign bit of b and add. 19 COMPILER_RT_ABI fp_t 20 __subdf3(fp_t a, fp_t b) { 21 return __adddf3(a, fromRep(toRep(b) ^ signBit)); 22 } 23 24 #if defined(__ARM_EABI__) 25 #if defined(COMPILER_RT_ARMHF_TARGET) 26 AEABI_RTABI fp_t __aeabi_dsub(fp_t a, fp_t b) { 27 return __subdf3(a, b); 28 } 29 #else 30 AEABI_RTABI fp_t __aeabi_dsub(fp_t a, fp_t b) COMPILER_RT_ALIAS(__subdf3); 31 #endif 32 #endif 33
Indexes created Sat Sep 20 22:09:52 GMT 2025