You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
58 lines
2.0 KiB
58 lines
2.0 KiB
//========= Copyright © 1996-2005, Valve Corporation, All rights reserved. ============//
|
|
//
|
|
// Purpose:
|
|
//
|
|
//=============================================================================//
|
|
|
|
|
|
#include "mathlib/mathlib.h"
|
|
#include "convar.h" // ConVar define
|
|
#include "view.h"
|
|
#include "gl_cvars.h" // mat_overbright
|
|
#include "cmd.h" // Cmd_*
|
|
#include "console.h" // ConMsg
|
|
|
|
// memdbgon must be the last include file in a .cpp file!!!
|
|
#include "tier0/memdbgon.h"
|
|
|
|
static bool s_bAllow3DNow = true;
|
|
static bool s_bAllowSSE2 = true;
|
|
|
|
|
|
static void OnEnableFastMathChanged( IConVar *var = NULL, const char *pOldValue = NULL, float flOldValue = 0.0f);
|
|
|
|
ConVar enable_fast_math( "enable_fast_math", "1" , FCVAR_RELEASE, "Turns Denormals-Are-Zeroes and Flush-to-Zero on or off", OnEnableFastMathChanged );
|
|
|
|
// <sergiy> We should use consistent SSE flags on Linux and Windows to avoid different math/physics/casting results.
|
|
// Also, we should try to use FZ/DAZ when we can because without it,
|
|
// It would be preferable to use the verbose macros to set/reset FZ and DAZ modes on SSE, but
|
|
// in Linux, we are using an outdated version of GCC that doesn't have those defined in standard headers.
|
|
// So I'll just throw literals here until such time as we rev the version of GCC.
|
|
|
|
static void OnEnableFastMathChanged( IConVar *var, const char *pOldValue, float flOldValue )
|
|
{
|
|
if ( enable_fast_math.GetBool() )
|
|
{
|
|
_mm_setcsr( _mm_getcsr() | 0x8040 );
|
|
|
|
//_MM_SET_FLUSH_ZERO_MODE( _MM_FLUSH_ZERO_ON );
|
|
//_MM_SET_DENORMALS_ZERO_MODE( _MM_DENORMALS_ZERO_ON );
|
|
}
|
|
else
|
|
{
|
|
_mm_setcsr( _mm_getcsr() & ~0x8040 );
|
|
|
|
//_MM_SET_FLUSH_ZERO_MODE( _MM_FLUSH_ZERO_OFF );
|
|
//_MM_SET_DENORMALS_ZERO_MODE( _MM_DENORMALS_ZERO_OFF );
|
|
}
|
|
}
|
|
|
|
void InitMathlib( void )
|
|
{
|
|
MathLib_Init( 2.2f, // v_gamma.GetFloat()
|
|
2.2f, // v_texgamma.GetFloat()
|
|
0.0f /*v_brightness.GetFloat() */,
|
|
2.0f /*mat_overbright.GetInt() */, s_bAllow3DNow, true, s_bAllowSSE2, true );
|
|
OnEnableFastMathChanged();
|
|
}
|
|
|