| /* |
| * 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. |
| */ |
| |
| #include "math32.h" |
| #include "remainderF_piby2.h" |
| #include "sincosF_piby4.h" |
| |
| // Calculate half_sin and half_cos at once |
| |
| __attribute__((always_inline, weak)) float |
| __hsa_half_sincos(float x, float *cp) |
| { |
| int ix = as_int(x); |
| int ax = ix & 0x7fffffff; |
| float dx = as_float(ax); |
| |
| float r0, r1; |
| int regn = argReductionSmallS(&r0, &r1, dx); |
| |
| float ss = sinf_piby4_new(r0, r1); |
| float cc = cosf_piby4_new(r0, r1); |
| bool reg0 = (regn & 1) != 0; |
| float c = reg0 ? -ss : cc; |
| float s = reg0 ? cc : ss; |
| int xsign = ((regn > 1) << 31); |
| c = as_float(as_int(c) ^ xsign); |
| s = as_float(as_int(s) ^ xsign); |
| |
| bool is_huge = ax > 0x47800000; |
| c = is_huge ? 1.0f : c; |
| s = is_huge ? 1.0f : s; |
| s = as_float(as_int(s) ^ (ix ^ ax)); |
| s = x == 0.0f ? x : s; |
| bool is_inf = ax >= PINFBITPATT_SP32; |
| c = is_inf ? as_float(QNANBITPATT_SP32) : c; |
| s = is_inf ? as_float(QNANBITPATT_SP32) : s; |
| *cp = c; |
| return s; |
| } |