| /******************************************************************************* |
| * Copyright (C) 2018 Cadence Design Systems, Inc. |
| * |
| * Permission is hereby granted, free of charge, to any person obtaining |
| * a copy of this software and associated documentation files (the |
| * "Software"), to use this Software with Cadence processor cores only and |
| * not with any other processors and platforms, 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 "dsp_comm.h" |
| |
| void dsp_memcpy(void *d, void *s, unsigned int size) |
| { |
| unsigned char *dest = (unsigned char*)d; |
| unsigned char *src = (unsigned char*)s; |
| |
| if (s == d) { |
| return; |
| } else if (src > dest) { |
| for (; dest < ((unsigned char*)d + size); dest++) { |
| *dest = *src; |
| src++; |
| } |
| } else { |
| src = src + (size - 1); |
| for (dest = dest + (size - 1); dest >= (unsigned char*)d; dest--) { |
| *dest = *src; |
| src--; |
| } |
| } |
| } |
| |
| |
| void dsp_memset(void *d, unsigned char ucData, unsigned int size) |
| { |
| unsigned int i; |
| unsigned char *dest = (unsigned char*)d; |
| |
| for(i = 0; i < size; i++) |
| *dest++ = ucData; |
| } |
| int division(int a, int b) |
| { |
| const int bits_in_word_m1 = (int)(sizeof(int) * 8) - 1; |
| int s_a = a >> bits_in_word_m1; /* s_a = a < 0 ? -1 : 0 */ |
| int s_b = b >> bits_in_word_m1; /* s_b = b < 0 ? -1 : 0 */ |
| a = (a ^ s_a) - s_a; /* negate if s_a == -1 */ |
| b = (b ^ s_b) - s_b; /* negate if s_b == -1 */ |
| s_a ^= s_b; /* sign of quotient */ |
| /* |
| * On CPUs without unsigned hardware division support, |
| * this calls __udivsi3 (notice the cast to su_int). |
| * On CPUs with unsigned hardware division support, |
| * this uses the unsigned division instruction. |
| */ |
| return ((int)a/(int)b ^ s_a) - s_a; /* negate if s_a == -1 */ |
| |
| } |
| |
| |
| |
| |