| 1 | //===-- lib/subtf3.c - Quad-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 quad-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 QUAD_PRECISION |
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| 14 | #include "fp_lib.h" |
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| 15 | |
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| 16 | #if defined(CRT_HAS_TF_MODE) |
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| 17 | COMPILER_RT_ABI fp_t __addtf3(fp_t a, fp_t b); |
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| 18 | |
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| 19 | // Subtraction; flip the sign bit of b and add. |
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| 20 | COMPILER_RT_ABI fp_t __subtf3(fp_t a, fp_t b) { |
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| 21 | return __addtf3(a, b: fromRep(x: toRep(x: b) ^ signBit)); |
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| 22 | } |
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| 23 | |
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| 24 | #endif |
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| 25 | |
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