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