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92 lines
2.9 KiB
C
92 lines
2.9 KiB
C
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/*******************************************************************************
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MIT License
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-----------
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Copyright (c) 2002-2019 Advanced Micro Devices, Inc.
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Permission is hereby granted, free of charge, to any person obtaining a copy
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of this Software and associated documentaon files (the "Software"), to deal
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in the Software without restriction, including without limitation the rights
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to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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copies of the Software, and to permit persons to whom the Software is
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furnished to do so, subject to the following conditions:
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The above copyright notice and this permission notice shall be included in
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all copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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THE SOFTWARE.
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*******************************************************************************/
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#include "libm.h"
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#include "libm_util.h"
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#if USE_SOFTWARE_SQRT
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#define USE_SQRTF_AMD_INLINE
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#endif
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#define USE_NANF_WITH_FLAGS
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#define USE_HANDLE_ERRORF
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#include "libm_inlines.h"
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#if USE_SOFTWARE_SQRT
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#undef USE_SQRTF_AMD_INLINE
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#endif
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#undef USE_NANF_WITH_FLAGS
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#undef USE_HANDLE_ERRORF
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#include "libm_errno.h"
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// Disable "C4163: not available as intrinsic function" warning that older
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// compilers may issue here.
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#pragma warning(disable:4163)
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#pragma function(sqrtf)
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float sqrtf(float x)
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{
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#if USE_SOFTWARE_SQRT
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return sqrtf_amd_inline(x);
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#else
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float r;
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unsigned int ux;
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GET_BITS_SP32(x, ux);
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/* Check for special cases for Microsoft error handling */
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if ((ux & PINFBITPATT_SP32) == PINFBITPATT_SP32)
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{
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/* x is infinity, or NaN */
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if (ux & MANTBITS_SP32)
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{
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/* NaN of some sort */
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/* If it's a signaling NaN, convert to QNaN */
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return _handle_errorf("sqrtf", OP_SQRT, ux|0x00400000, _DOMAIN, 0,
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EDOM, x, 0.0F, 1);
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}
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else
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{
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/* +/-infinity */
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if (ux & SIGNBIT_SP32)
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{
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/* - infinity */
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return _handle_errorf("sqrtf", OP_SQRT, INDEFBITPATT_SP32,
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_DOMAIN, AMD_F_INVALID, EDOM, x, 0.0F, 1);
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}
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/* positive infinite is not a problem */
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}
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}
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if ((ux & SIGNBIT_SP32)&&(ux & ~SIGNBIT_SP32)) /* if x < zero */
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{
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return _handle_errorf("sqrtf", OP_SQRT, INDEFBITPATT_SP32,
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_DOMAIN, AMD_F_INVALID, EDOM, x, 0.0F, 1);
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}
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/* VC++ intrinsic call */
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_mm_store_ss(&r, _mm_sqrt_ss(_mm_load_ss(&x)));
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return r;
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#endif
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}
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