dolphin/Source/Core/Common/FPURoundMode.h

// Copyright 2008 Dolphin Emulator Project
// Licensed under GPLv2+
// Refer to the license.txt file included.

#pragma once

#include "Common/CommonTypes.h"

namespace FPURoundMode
{
// TODO: MSVC currently produces broken code:
// https://connect.microsoft.com/VisualStudio/feedback/details/828892/vc-2013-miscompilation-with-enums-and-bit-fields
// Once that is fixed, change types in SetRoundMode(), SetSIMDMode(), and in UReg_FPSCR to
// 'RoundMode'.

enum RoundMode
{
  ROUND_NEAR = 0,
  ROUND_CHOP = 1,
  ROUND_UP = 2,
  ROUND_DOWN = 3
};
enum PrecisionMode
{
  PREC_24 = 0,
  PREC_53 = 1,
  PREC_64 = 2
};

void SetRoundMode(int mode);

void SetPrecisionMode(PrecisionMode mode);

void SetSIMDMode(int rounding_mode, bool non_ieee_mode);

/*
 * There are two different flavors of float to int conversion:
 * _mm_cvtps_epi32() and _mm_cvttps_epi32().
 *
 * The first rounds according to the MXCSR rounding bits.
 * The second one always uses round towards zero.
 */
void SaveSIMDState();
void LoadSIMDState();
void LoadDefaultSIMDState();
}