blob: 48e53cd7016d34c576e1f9e4bc3c1c851fd90fa2 [file] [log] [blame]
* Copyright (C) 2008-2009 Advanced Micro Devices, Inc. All Rights Reserved.
* This file is part of libacml_mv.
* libacml_mv is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
* libacml_mv is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* Lesser General Public License for more details.
* You should have received a copy of the GNU Lesser General Public
* License along with libacml_mv. If not, see
* <>.
#include <emmintrin.h>
#include <math.h>
#ifdef WIN64
#include <fpieee.h>
#include <errno.h>
#include "../inc/libm_amd.h"
#include "../inc/libm_util_amd.h"
#include "../inc/libm_special.h"
#ifdef WINDOWS
#pragma function(sqrtf)
/*SSE2 contains an instruction SQRTSS. This instruction Computes the square root
of the low-order single-precision floating-point value in an XMM register
or in a 32-bit memory location and writes the result in the low-order doubleword
of another XMM register. The corresponding intrinsic is _mm_sqrt_ss()*/
float FN_PROTOTYPE(sqrtf)(float x)
__m128 X128;
float result;
UT32 uresult;
if(x < 0.0)
uresult.u32 = 0xffc00000;
unsigned int is_x_snan;
UT32 xm; xm.f32 = x;
is_x_snan = ( ((xm.u32 & QNAN_MASK_32) == 0) ? 1 : 0 );
__amd_handle_errorf(DOMAIN, EDOM, "sqrt", x, is_x_snan, 0.0f, 0, uresult.f32, 0);
return uresult.f32;
/*Load x into an XMM register*/
X128 = _mm_load_ss(&x);
/*Calculate sqrt using SQRTSS instrunction*/
X128 = _mm_sqrt_ss(X128);
/*Store back the result into a single precision floating point number*/
_mm_store_ss(&result, X128);
return result;