Bill Yi | 4e213d5 | 2015-06-23 13:53:11 -0700 | [diff] [blame] | 1 | /* Wrapper for the MMX version of peakval |
| 2 | * Copyright 2004 Phil Karn, KA9Q |
| 3 | */ |
| 4 | |
| 5 | #include <stdlib.h> |
| 6 | |
| 7 | int peakval_mmx_assist(signed short *,int); |
| 8 | |
| 9 | int peakval_mmx(signed short *b,int cnt){ |
| 10 | int peak = 0; |
| 11 | int a; |
| 12 | |
| 13 | while(((int)b & 7) != 0 && cnt != 0){ |
| 14 | a = abs(*b); |
| 15 | if(a > peak) |
| 16 | peak = a; |
| 17 | b++; |
| 18 | cnt--; |
| 19 | } |
| 20 | a = peakval_mmx_assist(b,cnt); |
| 21 | if(a > peak) |
| 22 | peak = a; |
| 23 | b += cnt & ~3; |
| 24 | cnt &= 3; |
| 25 | |
| 26 | while(cnt != 0){ |
| 27 | a = abs(*b); |
| 28 | if(a > peak) |
| 29 | peak = a; |
| 30 | b++; |
| 31 | cnt--; |
| 32 | } |
| 33 | return peak; |
| 34 | } |