compiler-rt/lib/builtins/fixunssfdi.c

   1 //===-- fixunssfdi.c - Implement __fixunssfdi -----------------------------===//
   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 SINGLE_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 __fixunssfdi(float a) {
  17   if (a <= 0.0f)
  18     return 0;
  19   double da = a;
  20   su_int high = da / 4294967296.f;               // da / 0x1p32f;
  21   su_int low = da - (double)high * 4294967296.f; // high * 0x1p32f;
  22   return ((du_int)high << 32) | low;
  23 }
  24
  25 #else
  26 // Support for systems that don't have hardware floating-point; there are no
  27 // flags to set, and we don't want to code-gen to an unknown soft-float
  28 // implementation.
  29
  30 typedef du_int fixuint_t;
  31 #include "fp_fixuint_impl.inc"
  32
  33 COMPILER_RT_ABI du_int __fixunssfdi(fp_t a) { return __fixuint(a); }
  34
  35 #endif
  36
  37 #if defined(__ARM_EABI__)
  38 #if defined(COMPILER_RT_ARMHF_TARGET)
  39 AEABI_RTABI du_int __aeabi_f2ulz(fp_t a) { return __fixunssfdi(a); }
  40 #else
  41 COMPILER_RT_ALIAS(__fixunssfdi, __aeabi_f2ulz)
  42 #endif
  43 #endif
  44
  45 #if defined(__MINGW32__) && defined(__arm__)
  46 COMPILER_RT_ALIAS(__fixunssfdi, __stou64)
  47 #endif