1 //===-- lib/comparedf2.c - Double-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 //   __eqdf2   __gedf2   __unorddf2
12 //   __ledf2   __gtdf2
13 //   __ltdf2
14 //   __nedf2
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 //   __ledf2(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 //   __gedf2(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 //   __unorddf2(a,b) returns 0 if both a and b are numbers
32 //                           1 if either a or b is NaN
33 //
34 // Note that __ledf2( ) and __gedf2( ) are identical except in their handling of
35 // NaN values.
36 //
37 //===----------------------------------------------------------------------===//
38 
39 #define DOUBLE_PRECISION
40 #include "fp_lib.h"
41 
42 #include "fp_compare_impl.inc"
43 
44 COMPILER_RT_ABI CMP_RESULT __ledf2(fp_t a, fp_t b) { return __leXf2__(a, b); }
45 
46 #if defined(__ELF__)
47 // Alias for libgcc compatibility
48 COMPILER_RT_ALIAS(__ledf2, __cmpdf2)
49 #endif
50 COMPILER_RT_ALIAS(__ledf2, __eqdf2)
51 COMPILER_RT_ALIAS(__ledf2, __ltdf2)
52 COMPILER_RT_ALIAS(__ledf2, __nedf2)
53 
54 COMPILER_RT_ABI CMP_RESULT __gedf2(fp_t a, fp_t b) { return __geXf2__(a, b); }
55 
56 COMPILER_RT_ALIAS(__gedf2, __gtdf2)
57 
58 COMPILER_RT_ABI CMP_RESULT __unorddf2(fp_t a, fp_t b) {
59   return __unordXf2__(a, b);
60 }
61 
62 #if defined(__ARM_EABI__)
63 #if defined(COMPILER_RT_ARMHF_TARGET)
64 AEABI_RTABI int __aeabi_dcmpun(fp_t a, fp_t b) { return __unorddf2(a, b); }
65 #else
66 COMPILER_RT_ALIAS(__unorddf2, __aeabi_dcmpun)
67 #endif
68 #endif
69 
70 #if defined(_WIN32) && !defined(__MINGW32__)
71 // The alias mechanism doesn't work on Windows except for MinGW, so emit
72 // wrapper functions.
73 int __eqdf2(fp_t a, fp_t b) { return __ledf2(a, b); }
74 int __ltdf2(fp_t a, fp_t b) { return __ledf2(a, b); }
75 int __nedf2(fp_t a, fp_t b) { return __ledf2(a, b); }
76 int __gtdf2(fp_t a, fp_t b) { return __gedf2(a, b); }
77 #endif
78