| /* |
| * 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 "ibuiltins.h" |
| |
| #if __OPENCL_C_VERSION__ >= 200 |
| |
| // ----- [u]char ----- |
| |
| __attribute__((overloadable, always_inline)) char |
| ctz(char x) |
| { |
| uint z = __hsail_lastbit_u32((uint)x & 0xffU); |
| return x == 0 ? 8U : z; |
| } |
| |
| __attribute__((overloadable, always_inline)) uchar |
| ctz(uchar x) |
| { |
| uint z = __hsail_lastbit_u32((uint)x); |
| return x == 0 ? 8U : z; |
| } |
| |
| // ----- [u]short ----- |
| |
| __attribute__((overloadable, always_inline)) short |
| ctz(short x) |
| { |
| uint z = __hsail_lastbit_u32((uint)x & 0xffffU); |
| return x == 0 ? 16U : z; |
| } |
| |
| __attribute__((overloadable, always_inline)) ushort |
| ctz(ushort x) |
| { |
| uint z = __hsail_lastbit_u32((uint)x); |
| return x == 0 ? 16U : z; |
| } |
| |
| // ----- [u]int ----- |
| |
| __attribute__((always_inline)) static uint |
| myctz4(uint x) |
| { |
| uint z = __hsail_lastbit_u32(x); |
| return x == 0U ? 32 : z; |
| } |
| |
| extern __attribute__((overloadable, alias("myctz4"))) uint ctz(uint); |
| extern __attribute__((overloadable, alias("myctz4"))) int ctz(int); |
| |
| // ----- [u]long ----- |
| |
| __attribute__((always_inline)) static ulong |
| myctz8(ulong x) |
| { |
| uint xhi = x >> 32; |
| uint xlo = (uint)x; |
| uint zhi = __hsail_lastbit_u32(xhi); |
| uint zlo = __hsail_lastbit_u32(xlo); |
| uint chi = (xhi == 0 ? 32 : zhi) + 32; |
| return xlo == 0 ? chi : zlo; |
| } |
| |
| extern __attribute__((overloadable, alias("myctz8"))) ulong ctz(ulong); |
| extern __attribute__((overloadable, alias("myctz8"))) long ctz(long); |
| |
| #endif |