compiler-rt/lib/builtins/divsi3.c

   1 //===-- divsi3.c - Implement __divsi3 -------------------------------------===//
   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 // This file implements __divsi3 for the compiler_rt library.
  10 //
  11 //===----------------------------------------------------------------------===//
  12
  13 #include "int_lib.h"
  14
  15 // Returns: a / b
  16
  17 #define fixint_t si_int
  18 #define fixuint_t su_int
  19 // On CPUs without unsigned hardware division support,
  20 //  this calls __udivsi3 (notice the cast to su_int).
  21 // On CPUs with unsigned hardware division support,
  22 //  this uses the unsigned division instruction.
  23 #define COMPUTE_UDIV(a, b) ((su_int)(a) / (su_int)(b))
  24 #include "int_div_impl.inc"
  25
  26 COMPILER_RT_ABI si_int __divsi3(si_int a, si_int b) { return __divXi3(a, b); }
  27
  28 #if defined(__ARM_EABI__)
  29 COMPILER_RT_ALIAS(__divsi3, __aeabi_idiv)
  30 #endif