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//===-- RoundingModeUtils.cpp ---------------------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
#include "RoundingModeUtils.h"
#include <fenv.h>
namespace __llvm_libc {
namespace fputil {
namespace testing {
int get_fe_rounding(RoundingMode mode) {
switch (mode) {
case RoundingMode::Upward:
return FE_UPWARD;
break;
case RoundingMode::Downward:
return FE_DOWNWARD;
break;
case RoundingMode::TowardZero:
return FE_TOWARDZERO;
break;
case RoundingMode::Nearest:
return FE_TONEAREST;
break;
default:
__builtin_unreachable();
}
}
ForceRoundingMode::ForceRoundingMode(RoundingMode mode) {
old_rounding_mode = fegetround();
rounding_mode = get_fe_rounding(mode);
if (old_rounding_mode != rounding_mode)
fesetround(rounding_mode);
}
ForceRoundingMode::~ForceRoundingMode() {
if (old_rounding_mode != rounding_mode)
fesetround(old_rounding_mode);
}
} // namespace testing
} // namespace fputil
} // namespace __llvm_libc
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