| 1 | //===-- lib/comparedf2.c - Double-precision comparisons -----------*- C -*-===// |
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| 2 | // |
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| 3 | // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
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| 4 | // See https://llvm.org/LICENSE.txt for license information. |
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| 5 | // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
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| 6 | // |
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| 7 | //===----------------------------------------------------------------------===// |
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| 8 | // |
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| 9 | // // This file implements the following soft-float comparison routines: |
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| 10 | // |
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| 11 | // __eqdf2 __gedf2 __unorddf2 |
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| 12 | // __ledf2 __gtdf2 |
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| 13 | // __ltdf2 |
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| 14 | // __nedf2 |
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| 15 | // |
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| 16 | // The semantics of the routines grouped in each column are identical, so there |
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| 17 | // is a single implementation for each, and wrappers to provide the other names. |
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| 18 | // |
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| 19 | // The main routines behave as follows: |
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| 20 | // |
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| 21 | // __ledf2(a,b) returns -1 if a < b |
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| 22 | // 0 if a == b |
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| 23 | // 1 if a > b |
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| 24 | // 1 if either a or b is NaN |
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| 25 | // |
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| 26 | // __gedf2(a,b) returns -1 if a < b |
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| 27 | // 0 if a == b |
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| 28 | // 1 if a > b |
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| 29 | // -1 if either a or b is NaN |
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| 30 | // |
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| 31 | // __unorddf2(a,b) returns 0 if both a and b are numbers |
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| 32 | // 1 if either a or b is NaN |
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| 33 | // |
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| 34 | // Note that __ledf2( ) and __gedf2( ) are identical except in their handling of |
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| 35 | // NaN values. |
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| 36 | // |
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| 37 | //===----------------------------------------------------------------------===// |
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| 38 | |
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| 39 | #define DOUBLE_PRECISION |
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| 40 | #include "fp_lib.h" |
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| 41 | |
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| 42 | #include "fp_compare_impl.inc" |
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| 43 | |
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| 44 | COMPILER_RT_ABI CMP_RESULT __ledf2(fp_t a, fp_t b) { return __leXf2__(a, b); } |
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| 45 | |
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| 46 | #if defined(__ELF__) |
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| 47 | // Alias for libgcc compatibility |
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| 48 | COMPILER_RT_ALIAS(__ledf2, __cmpdf2) |
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| 49 | #endif |
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| 50 | COMPILER_RT_ALIAS(__ledf2, __eqdf2) |
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| 51 | COMPILER_RT_ALIAS(__ledf2, __ltdf2) |
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| 52 | COMPILER_RT_ALIAS(__ledf2, __nedf2) |
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| 53 | |
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| 54 | COMPILER_RT_ABI CMP_RESULT __gedf2(fp_t a, fp_t b) { return __geXf2__(a, b); } |
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| 55 | |
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| 56 | COMPILER_RT_ALIAS(__gedf2, __gtdf2) |
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| 57 | |
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| 58 | COMPILER_RT_ABI CMP_RESULT __unorddf2(fp_t a, fp_t b) { |
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| 59 | return __unordXf2__(a, b); |
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| 60 | } |
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| 61 | |
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| 62 | #if defined(__ARM_EABI__) |
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| 63 | #if defined(COMPILER_RT_ARMHF_TARGET) |
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| 64 | AEABI_RTABI int __aeabi_dcmpun(fp_t a, fp_t b) { return __unorddf2(a, b); } |
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| 65 | #else |
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| 66 | COMPILER_RT_ALIAS(__unorddf2, __aeabi_dcmpun) |
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| 67 | #endif |
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| 68 | #endif |
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| 69 | |
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| 70 | #if defined(_WIN32) && !defined(__MINGW32__) |
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| 71 | // The alias mechanism doesn't work on Windows except for MinGW, so emit |
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| 72 | // wrapper functions. |
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| 73 | int __eqdf2(fp_t a, fp_t b) { return __ledf2(a, b); } |
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| 74 | int __ltdf2(fp_t a, fp_t b) { return __ledf2(a, b); } |
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| 75 | int __nedf2(fp_t a, fp_t b) { return __ledf2(a, b); } |
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| 76 | int __gtdf2(fp_t a, fp_t b) { return __gedf2(a, b); } |
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| 77 | #endif |
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| 78 | |
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