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49 lines
1.3 KiB
49 lines
1.3 KiB
//===-- Template for diffing remquo results ---------------------*- 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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#include "utils/FPUtil/FPBits.h"
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#include <math.h>
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#include <stddef.h>
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#include <stdint.h>
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template <typename T> using RemQuoFunc = T (*)(T, T, int *);
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template <typename T>
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void RemQuoDiff(RemQuoFunc<T> func1, RemQuoFunc<T> func2, const uint8_t *data,
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size_t size) {
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constexpr size_t typeSize = sizeof(T);
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if (size < 2 * typeSize)
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return;
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T x = *reinterpret_cast<const T *>(data);
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T y = *reinterpret_cast<const T *>(data + typeSize);
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int q1, q2;
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T remainder1 = func1(x, y, &q1);
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T remainder2 = func2(x, y, &q2);
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if (isnan(remainder1)) {
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if (!isnan(remainder2))
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__builtin_trap();
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return;
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}
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if (isinf(remainder2) != isinf(remainder1))
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__builtin_trap();
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// Compare only the 3 LS bits of the quotient.
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if ((q1 & 0x7) != (q2 & 0x7))
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__builtin_trap();
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__llvm_libc::fputil::FPBits<T> bits1(remainder1);
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__llvm_libc::fputil::FPBits<T> bits2(remainder2);
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if (bits1.bitsAsUInt() != bits2.bitsAsUInt())
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__builtin_trap();
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}
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