1 /*
   2  * Copyright (c) 2018, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.
   8  *
   9  * This code is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  14  *
  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  *
  23  */
  24 
  25 #ifdef __SOFTFP__
  26 
  27 // Soft float function declarations
  28 extern "C" {
  29     extern float  __aeabi_fadd(float, float);
  30     extern float  __aeabi_fsub(float, float);
  31     extern double __aeabi_dadd(double, double);
  32     extern double __aeabi_dsub(double, double);
  33 
  34     extern float __aeabi_fadd_extlib(float, float);
  35     extern float __aeabi_fsub_extlib(float, float);
  36     extern double __aeabi_dadd_extlib(double, double);
  37     extern double __aeabi_dsub_extlib(double, double);
  38 };
  39 
  40 #ifdef SOFTFLOAT_EXTERNAL
  41 
  42 extern "C" {
  43 #include "softfloat.h"
  44 }
  45 
  46 #include <cstring>
  47 
  48 static float __aeabi_float_handling(float natA, float natB, bool add) {
  49     float32_t libC;
  50 
  51     libC = add ? f32_add(reinterpret_cast<float32_t &>(natA), reinterpret_cast<float32_t &>(natB))
  52                : f32_sub(reinterpret_cast<float32_t &>(natA), reinterpret_cast<float32_t &>(natB));
  53 
  54     return reinterpret_cast<float &>(libC);
  55 }
  56 
  57 static double __aeabi_double_handling(double natA, double natB, bool add) {
  58     float64_t libC;
  59 
  60     libC = add ? f64_add(reinterpret_cast<float64_t &>(natA), reinterpret_cast<float64_t &>(natB))
  61                : f64_sub(reinterpret_cast<float64_t &>(natA), reinterpret_cast<float64_t &>(natB));
  62 
  63     return reinterpret_cast<double &>(libC);
  64 }
  65 
  66 float __aeabi_fadd_extlib(float a, float b) {
  67     return __aeabi_float_handling(a, b, true);
  68 }
  69 
  70 float __aeabi_fsub_extlib(float a, float b) {
  71     return __aeabi_float_handling(a, b, false);
  72 }
  73 
  74 double __aeabi_dadd_extlib(double a, double b) {
  75     return __aeabi_double_handling(a, b, true);
  76 }
  77 
  78 double __aeabi_dsub_extlib(double a, double b) {
  79     return __aeabi_double_handling(a, b, false);
  80 }
  81 
  82 #else
  83 
  84 float __aeabi_fadd_extlib(float a, float b) {
  85     return __aeabi_fadd(a, b);
  86 }
  87 
  88 float __aeabi_fsub_extlib(float a, float b) {
  89     return __aeabi_fsub(a, b);
  90 }
  91 
  92 double __aeabi_dadd_extlib(double a, double b) {
  93     return __aeabi_dadd(a, b);
  94 }
  95 
  96 double __aeabi_dsub_extlib(double a, double b) {
  97     return __aeabi_dsub(a, b);
  98 }
  99 
 100 #endif
 101 
 102 #endif // __SOFTFP__