generic/lib/math/math.h

/*
 * Copyright (c) 2014 Advanced Micro Devices, Inc.
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */

#ifndef __CLC_MATH_H_
#define __CLC_MATH_H_

#include "clc/clcfunc.h"
#include "clc/as_type.h"
#include "config.h"

#define SNAN 0x001
#define QNAN 0x002
#define NINF 0x004
#define NNOR 0x008
#define NSUB 0x010
#define NZER 0x020
#define PZER 0x040
#define PSUB 0x080
#define PNOR 0x100
#define PINF 0x200

#if (defined __AMDGCN__ || defined __R600__) && !defined __HAS_FMAF__
#define HAVE_HW_FMA32() (0)
#else
#define HAVE_HW_FMA32() (1)
#endif

#define HAVE_BITALIGN() (0)
#define HAVE_FAST_FMA32() (0)

#define MATH_DIVIDE(X, Y) ((X) / (Y))
#define MATH_RECIP(X) (1.0f / (X))
#define MATH_SQRT(X) sqrt(X)

#define SIGNBIT_SP32      0x80000000
#define EXSIGNBIT_SP32    0x7fffffff
#define EXPBITS_SP32      0x7f800000
#define MANTBITS_SP32     0x007fffff
#define ONEEXPBITS_SP32   0x3f800000
#define TWOEXPBITS_SP32   0x40000000
#define HALFEXPBITS_SP32  0x3f000000
#define IMPBIT_SP32       0x00800000
#define QNANBITPATT_SP32  0x7fc00000
#define INDEFBITPATT_SP32 0xffc00000
#define PINFBITPATT_SP32  0x7f800000
#define NINFBITPATT_SP32  0xff800000
#define EXPBIAS_SP32      127
#define EXPSHIFTBITS_SP32 23
#define BIASEDEMIN_SP32   1
#define EMIN_SP32         -126
#define BIASEDEMAX_SP32   254
#define EMAX_SP32         127
#define LAMBDA_SP32       1.0e30
#define MANTLENGTH_SP32   24
#define BASEDIGITS_SP32   7

_CLC_OVERLOAD _CLC_INLINE float __clc_flush_denormal_if_not_supported(float x)
{
	int ix = as_int(x);
	if (!__clc_fp32_subnormals_supported() &&
		((ix & EXPBITS_SP32) == 0) && ((ix & MANTBITS_SP32) != 0)) {
		ix &= SIGNBIT_SP32;
		x = as_float(ix);
	}
	return x;
}

#ifdef cl_khr_fp64

#define SIGNBIT_DP64      0x8000000000000000L
#define EXSIGNBIT_DP64    0x7fffffffffffffffL
#define EXPBITS_DP64      0x7ff0000000000000L
#define MANTBITS_DP64     0x000fffffffffffffL
#define ONEEXPBITS_DP64   0x3ff0000000000000L
#define TWOEXPBITS_DP64   0x4000000000000000L
#define HALFEXPBITS_DP64  0x3fe0000000000000L
#define IMPBIT_DP64       0x0010000000000000L
#define QNANBITPATT_DP64  0x7ff8000000000000L
#define INDEFBITPATT_DP64 0xfff8000000000000L
#define PINFBITPATT_DP64  0x7ff0000000000000L
#define NINFBITPATT_DP64  0xfff0000000000000L
#define EXPBIAS_DP64      1023
#define EXPSHIFTBITS_DP64 52
#define BIASEDEMIN_DP64   1
#define EMIN_DP64         -1022
#define BIASEDEMAX_DP64   2046 /* 0x7fe */
#define EMAX_DP64         1023 /* 0x3ff */
#define LAMBDA_DP64       1.0e300
#define MANTLENGTH_DP64   53
#define BASEDIGITS_DP64   15

#endif // cl_khr_fp64

#define ALIGNED(x)	__attribute__((aligned(x)))
#endif // __CLC_MATH_H_