51 lines
1.3 KiB
C++
51 lines
1.3 KiB
C++
//===-- RoundingModeUtils.cpp ---------------------------------------------===//
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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 "RoundingModeUtils.h"
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#include "src/__support/FPUtil/FEnvImpl.h"
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#include "src/__support/FPUtil/rounding_mode.h"
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#include <fenv.h>
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namespace LIBC_NAMESPACE {
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namespace fputil {
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namespace testing {
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int get_fe_rounding(RoundingMode mode) {
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switch (mode) {
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case RoundingMode::Upward:
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return FE_UPWARD;
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case RoundingMode::Downward:
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return FE_DOWNWARD;
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case RoundingMode::TowardZero:
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return FE_TOWARDZERO;
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case RoundingMode::Nearest:
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return FE_TONEAREST;
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}
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__builtin_unreachable();
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}
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ForceRoundingMode::ForceRoundingMode(RoundingMode mode) {
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old_rounding_mode = quick_get_round();
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rounding_mode = get_fe_rounding(mode);
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if (old_rounding_mode != rounding_mode) {
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int status = set_round(rounding_mode);
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success = (status == 0);
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} else {
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success = true;
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}
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}
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ForceRoundingMode::~ForceRoundingMode() {
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if (old_rounding_mode != rounding_mode)
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set_round(old_rounding_mode);
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}
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} // namespace testing
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} // namespace fputil
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} // namespace LIBC_NAMESPACE
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