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134 lines
3.7 KiB
C
134 lines
3.7 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 <fpieee.h>
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#include <excpt.h>
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#include <float.h>
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#include <math.h>
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#include <errno.h>
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#include "libm_new.h"
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// y = log10f(x)
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// y = log10(x)
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// y = logf(x)
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// y = log(x)
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// these codes and the ones in the related .asm files have to match
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#define LOG_X_ZERO 1
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#define LOG_X_NEG 2
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#define LOG_X_NAN 3
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static float _logf_special_common(float x, float y, U32 code, unsigned int op, char *name)
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{
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switch(code)
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{
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case LOG_X_ZERO:
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{
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UT64 ym; ym.u64 = 0; ym.f32[0] = y;
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_handle_errorf(name, op, ym.u64, _SING, AMD_F_DIVBYZERO, ERANGE, x, 0.0, 1);
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}
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break;
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case LOG_X_NEG:
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{
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UT64 ym; ym.u64 = 0; ym.f32[0] = y;
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_handle_errorf(name, op, ym.u64, _DOMAIN, AMD_F_INVALID, EDOM, x, 0.0, 1);
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}
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break;
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case LOG_X_NAN:
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{
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unsigned int is_snan;
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UT32 xm; UT64 ym;
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xm.f32 = x;
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is_snan = (((xm.u32 & QNAN_MASK_32) == QNAN_SET_32) ? 0 : 1);
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ym.u64 = 0; ym.f32[0] = y;
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if(is_snan)
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{
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_handle_errorf(name, op, ym.u64, _DOMAIN, AMD_F_INVALID, EDOM, x, 0.0, 1);
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}
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else
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{
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_handle_errorf(name, op, ym.u64, _DOMAIN, 0, EDOM, x, 0.0, 1);
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}
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}
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break;
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}
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return y;
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}
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float _logf_special(float x, float y, U32 code)
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{
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return _logf_special_common(x, y, code, _FpCodeLog, "logf");
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}
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float _log10f_special(float x, float y, U32 code)
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{
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return _logf_special_common(x, y, code, _FpCodeLog10, "log10f");
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}
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static double _log_special_common(double x, double y, U32 code, unsigned int op, char *name)
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{
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switch(code)
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{
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case LOG_X_ZERO:
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{
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UT64 ym; ym.f64 = y;
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_handle_error(name, op, ym.u64, _SING, AMD_F_DIVBYZERO, ERANGE, x, 0.0, 1);
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}
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break;
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case LOG_X_NEG:
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{
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UT64 ym; ym.f64 = y;
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_handle_error(name, op, ym.u64, _DOMAIN, AMD_F_INVALID, EDOM, x, 0.0, 1);
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}
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break;
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case LOG_X_NAN:
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{
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UT64 ym; ym.f64 = y;
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_handle_error(name, op, ym.u64, _DOMAIN, 0, EDOM, x, 0.0, 1);
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}
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break;
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}
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return y;
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}
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double _log_special(double x, double y, U32 code)
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{
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return _log_special_common(x, y, code, _FpCodeLog, "log");
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}
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double _log10_special(double x, double y, U32 code)
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{
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return _log_special_common(x, y, code, _FpCodeLog10, "log10");
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}
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