xref: /freebsd/contrib/llvm-project/compiler-rt/lib/builtins/comparetf2.c (revision 95ee2897e98f5d444f26ed2334cc7c439f9c16c6)
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
64