1*3cab2bb3Spatrick //===-- lib/adddf3.c - Double-precision subtraction ---------------*- C -*-===// 2*3cab2bb3Spatrick // 3*3cab2bb3Spatrick // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 4*3cab2bb3Spatrick // See https://llvm.org/LICENSE.txt for license information. 5*3cab2bb3Spatrick // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 6*3cab2bb3Spatrick // 7*3cab2bb3Spatrick //===----------------------------------------------------------------------===// 8*3cab2bb3Spatrick // 9*3cab2bb3Spatrick // This file implements double-precision soft-float subtraction. 10*3cab2bb3Spatrick // 11*3cab2bb3Spatrick //===----------------------------------------------------------------------===// 12*3cab2bb3Spatrick 13*3cab2bb3Spatrick #define DOUBLE_PRECISION 14*3cab2bb3Spatrick #include "fp_lib.h" 15*3cab2bb3Spatrick 16*3cab2bb3Spatrick // Subtraction; flip the sign bit of b and add. __subdf3(fp_t a,fp_t b)17*3cab2bb3SpatrickCOMPILER_RT_ABI fp_t __subdf3(fp_t a, fp_t b) { 18*3cab2bb3Spatrick return __adddf3(a, fromRep(toRep(b) ^ signBit)); 19*3cab2bb3Spatrick } 20*3cab2bb3Spatrick 21*3cab2bb3Spatrick #if defined(__ARM_EABI__) 22*3cab2bb3Spatrick #if defined(COMPILER_RT_ARMHF_TARGET) __aeabi_dsub(fp_t a,fp_t b)23*3cab2bb3SpatrickAEABI_RTABI fp_t __aeabi_dsub(fp_t a, fp_t b) { return __subdf3(a, b); } 24*3cab2bb3Spatrick #else 25*3cab2bb3Spatrick COMPILER_RT_ALIAS(__subdf3, __aeabi_dsub) 26*3cab2bb3Spatrick #endif 27*3cab2bb3Spatrick #endif 28