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