29 lines
982 B
C
29 lines
982 B
C
//===-- lib/adddf3.c - Double-precision subtraction ---------------*- 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 double-precision soft-float subtraction with the
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// IEEE-754 default rounding (to nearest, ties to even).
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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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// Subtraction; flip the sign bit of b and add.
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COMPILER_RT_ABI fp_t __subdf3(fp_t a, fp_t b) {
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return __adddf3(a, fromRep(toRep(b) ^ signBit));
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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 fp_t __aeabi_dsub(fp_t a, fp_t b) { return __subdf3(a, b); }
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#else
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COMPILER_RT_ALIAS(__subdf3, __aeabi_dsub)
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#endif
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#endif
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