| 1 | //===-- lib/adddf3.c - Double-precision subtraction ---------------*- 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 double-precision soft-float subtraction. |
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| 10 | // |
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| 11 | //===----------------------------------------------------------------------===// |
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| 12 | |
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| 13 | #define DOUBLE_PRECISION |
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| 14 | #include "fp_lib.h" |
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| 15 | |
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| 16 | // Subtraction; flip the sign bit of b and add. |
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| 17 | COMPILER_RT_ABI fp_t __subdf3(fp_t a, fp_t b) { |
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| 18 | return __adddf3(a, b: fromRep(x: toRep(x: b) ^ signBit)); |
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| 19 | } |
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| 20 | |
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| 21 | #if defined(__ARM_EABI__) |
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| 22 | #if defined(COMPILER_RT_ARMHF_TARGET) |
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| 23 | AEABI_RTABI fp_t __aeabi_dsub(fp_t a, fp_t b) { return __subdf3(a, b); } |
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| 24 | #else |
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| 25 | COMPILER_RT_ALIAS(__subdf3, __aeabi_dsub) |
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| 26 | #endif |
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| 27 | #endif |
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| 28 | |
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