1 2 /******************************************************************************* 3 MIT License 4 ----------- 5 6 Copyright (c) 2002-2019 Advanced Micro Devices, Inc. 7 8 Permission is hereby granted, free of charge, to any person obtaining a copy 9 of this Software and associated documentaon files (the "Software"), to deal 10 in the Software without restriction, including without limitation the rights 11 to use, copy, modify, merge, publish, distribute, sublicense, and/or sell 12 copies of the Software, and to permit persons to whom the Software is 13 furnished to do so, subject to the following conditions: 14 15 The above copyright notice and this permission notice shall be included in 16 all copies or substantial portions of the Software. 17 18 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 19 IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 20 FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE 21 AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 22 LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 23 OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN 24 THE SOFTWARE. 25 *******************************************************************************/ 26 27 #include "libm.h" 28 #include "libm_util.h" 29 30 #if USE_SOFTWARE_SQRT 31 #define USE_SQRTF_AMD_INLINE 32 #endif 33 #define USE_NANF_WITH_FLAGS 34 #define USE_HANDLE_ERRORF 35 #include "libm_inlines.h" 36 #if USE_SOFTWARE_SQRT 37 #undef USE_SQRTF_AMD_INLINE 38 #endif 39 #undef USE_NANF_WITH_FLAGS 40 #undef USE_HANDLE_ERRORF 41 42 #include "libm_errno.h" 43 44 // Disable "C4163: not available as intrinsic function" warning that older 45 // compilers may issue here. 46 #pragma warning(disable:4163) 47 #pragma function(sqrtf) 48 49 50 float sqrtf(float x) 51 { 52 #if USE_SOFTWARE_SQRT 53 return sqrtf_amd_inline(x); 54 #else 55 float r; 56 unsigned int ux; 57 GET_BITS_SP32(x, ux); 58 /* Check for special cases for Microsoft error handling */ 59 if ((ux & PINFBITPATT_SP32) == PINFBITPATT_SP32) 60 { 61 /* x is infinity, or NaN */ 62 if (ux & MANTBITS_SP32) 63 { 64 /* NaN of some sort */ 65 /* If it's a signaling NaN, convert to QNaN */ 66 return _handle_errorf("sqrtf", OP_SQRT, ux|0x00400000, _DOMAIN, 0, 67 EDOM, x, 0.0F, 1); 68 } 69 else 70 { 71 /* +/-infinity */ 72 if (ux & SIGNBIT_SP32) 73 { 74 /* - infinity */ 75 return _handle_errorf("sqrtf", OP_SQRT, INDEFBITPATT_SP32, 76 _DOMAIN, AMD_F_INVALID, EDOM, x, 0.0F, 1); 77 } 78 /* positive infinite is not a problem */ 79 } 80 } 81 if ((ux & SIGNBIT_SP32)&&(ux & ~SIGNBIT_SP32)) /* if x < zero */ 82 { 83 return _handle_errorf("sqrtf", OP_SQRT, INDEFBITPATT_SP32, 84 _DOMAIN, AMD_F_INVALID, EDOM, x, 0.0F, 1); 85 } 86 87 /* VC++ intrinsic call */ 88 _mm_store_ss(&r, _mm_sqrt_ss(_mm_load_ss(&x))); 89 return r; 90 #endif 91 } 92