compiler-rt/lib/builtins/fixunsdfdi.c

   1 //===-- fixunsdfdi.c - Implement __fixunsdfdi -----------------------------===//
   2 //
   3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
   4 // See https://llvm.org/LICENSE.txt for license information.
   5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
   6 //
   7 //===----------------------------------------------------------------------===//
   8
   9 #define DOUBLE_PRECISION
  10 #include "fp_lib.h"
  11
  12 #ifndef __SOFTFP__
  13 // Support for systems that have hardware floating-point; can set the invalid
  14 // flag as a side-effect of computation.
  15
  16 COMPILER_RT_ABI du_int __fixunsdfdi(double a) {
  17   if (a <= 0.0)
  18     return 0;
  19   su_int high = a / 4294967296.f;               // a / 0x1p32f;
  20   su_int low = a - (double)high * 4294967296.f; // high * 0x1p32f;
  21   return ((du_int)high << 32) | low;
  22 }
  23
  24 #else
  25 // Support for systems that don't have hardware floating-point; there are no
  26 // flags to set, and we don't want to code-gen to an unknown soft-float
  27 // implementation.
  28
  29 typedef du_int fixuint_t;
  30 #include "fp_fixuint_impl.inc"
  31
  32 COMPILER_RT_ABI du_int __fixunsdfdi(fp_t a) { return __fixuint(a); }
  33
  34 #endif
  35
  36 #if defined(__ARM_EABI__)
  37 #if defined(COMPILER_RT_ARMHF_TARGET)
  38 AEABI_RTABI du_int __aeabi_d2ulz(fp_t a) { return __fixunsdfdi(a); }
  39 #else
  40 COMPILER_RT_ALIAS(__fixunsdfdi, __aeabi_d2ulz)
  41 #endif
  42 #endif
  43
  44 #if defined(__MINGW32__) && defined(__arm__)
  45 COMPILER_RT_ALIAS(__fixunsdfdi, __dtou64)
  46 #endif