compiler-rt/lib/builtins/comparetf2.c

   1 //===-- lib/comparetf2.c - Quad-precision comparisons -------------*- C -*-===//
   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 the following soft-float comparison routines:
  10 //
  11 //   __eqtf2   __getf2   __unordtf2
  12 //   __letf2   __gttf2
  13 //   __lttf2
  14 //   __netf2
  15 //
  16 // The semantics of the routines grouped in each column are identical, so there
  17 // is a single implementation for each, and wrappers to provide the other names.
  18 //
  19 // The main routines behave as follows:
  20 //
  21 //   __letf2(a,b) returns -1 if a < b
  22 //                         0 if a == b
  23 //                         1 if a > b
  24 //                         1 if either a or b is NaN
  25 //
  26 //   __getf2(a,b) returns -1 if a < b
  27 //                         0 if a == b
  28 //                         1 if a > b
  29 //                        -1 if either a or b is NaN
  30 //
  31 //   __unordtf2(a,b) returns 0 if both a and b are numbers
  32 //                           1 if either a or b is NaN
  33 //
  34 // Note that __letf2( ) and __getf2( ) are identical except in their handling of
  35 // NaN values.
  36 //
  37 //===----------------------------------------------------------------------===//
  38
  39 #define QUAD_PRECISION
  40 #include "fp_lib.h"
  41
  42 #if defined(CRT_HAS_128BIT) && defined(CRT_LDBL_128BIT)
  43 #include "fp_compare_impl.inc"
  44
  45 COMPILER_RT_ABI CMP_RESULT __letf2(fp_t a, fp_t b) { return __leXf2__(a, b); }
  46
  47 #if defined(__ELF__)
  48 // Alias for libgcc compatibility
  49 COMPILER_RT_ALIAS(__letf2, __cmptf2)
  50 #endif
  51 COMPILER_RT_ALIAS(__letf2, __eqtf2)
  52 COMPILER_RT_ALIAS(__letf2, __lttf2)
  53 COMPILER_RT_ALIAS(__letf2, __netf2)
  54
  55 COMPILER_RT_ABI CMP_RESULT __getf2(fp_t a, fp_t b) { return __geXf2__(a, b); }
  56
  57 COMPILER_RT_ALIAS(__getf2, __gttf2)
  58
  59 COMPILER_RT_ABI CMP_RESULT __unordtf2(fp_t a, fp_t b) {
  60   return __unordXf2__(a, b);
  61 }
  62
  63 #endif