forked from OSchip/llvm-project
78 lines
2.5 KiB
C
78 lines
2.5 KiB
C
//===-- lib/comparedf2.c - Double-precision comparisons -----------*- C -*-===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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//
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// // This file implements the following soft-float comparison routines:
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//
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// __eqdf2 __gedf2 __unorddf2
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// __ledf2 __gtdf2
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// __ltdf2
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// __nedf2
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//
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// The semantics of the routines grouped in each column are identical, so there
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// is a single implementation for each, and wrappers to provide the other names.
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//
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// The main routines behave as follows:
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//
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// __ledf2(a,b) returns -1 if a < b
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// 0 if a == b
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// 1 if a > b
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// 1 if either a or b is NaN
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//
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// __gedf2(a,b) returns -1 if a < b
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// 0 if a == b
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// 1 if a > b
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// -1 if either a or b is NaN
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//
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// __unorddf2(a,b) returns 0 if both a and b are numbers
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// 1 if either a or b is NaN
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//
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// Note that __ledf2( ) and __gedf2( ) are identical except in their handling of
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// NaN values.
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//
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//===----------------------------------------------------------------------===//
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#define DOUBLE_PRECISION
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#include "fp_lib.h"
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#include "fp_compare_impl.inc"
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COMPILER_RT_ABI CMP_RESULT __ledf2(fp_t a, fp_t b) { return __leXf2__(a, b); }
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#if defined(__ELF__)
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// Alias for libgcc compatibility
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COMPILER_RT_ALIAS(__ledf2, __cmpdf2)
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#endif
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COMPILER_RT_ALIAS(__ledf2, __eqdf2)
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COMPILER_RT_ALIAS(__ledf2, __ltdf2)
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COMPILER_RT_ALIAS(__ledf2, __nedf2)
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COMPILER_RT_ABI CMP_RESULT __gedf2(fp_t a, fp_t b) { return __geXf2__(a, b); }
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COMPILER_RT_ALIAS(__gedf2, __gtdf2)
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COMPILER_RT_ABI CMP_RESULT __unorddf2(fp_t a, fp_t b) {
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return __unordXf2__(a, b);
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}
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#if defined(__ARM_EABI__)
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#if defined(COMPILER_RT_ARMHF_TARGET)
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AEABI_RTABI int __aeabi_dcmpun(fp_t a, fp_t b) { return __unorddf2(a, b); }
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#else
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COMPILER_RT_ALIAS(__unorddf2, __aeabi_dcmpun)
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#endif
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#endif
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#if defined(_WIN32) && !defined(__MINGW32__)
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// The alias mechanism doesn't work on Windows except for MinGW, so emit
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// wrapper functions.
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int __eqdf2(fp_t a, fp_t b) { return __ledf2(a, b); }
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int __ltdf2(fp_t a, fp_t b) { return __ledf2(a, b); }
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int __nedf2(fp_t a, fp_t b) { return __ledf2(a, b); }
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int __gtdf2(fp_t a, fp_t b) { return __gedf2(a, b); }
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#endif
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