1 | /* |
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2 | (C) Copyright IBM Corp. 2007, 2008 |
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3 | |
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4 | All rights reserved. |
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5 | |
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6 | Redistribution and use in source and binary forms, with or without |
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7 | modification, are permitted provided that the following conditions are met: |
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8 | |
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9 | * Redistributions of source code must retain the above copyright notice, |
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10 | this list of conditions and the following disclaimer. |
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11 | * Redistributions in binary form must reproduce the above copyright |
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12 | notice, this list of conditions and the following disclaimer in the |
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13 | documentation and/or other materials provided with the distribution. |
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14 | * Neither the name of IBM nor the names of its contributors may be |
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15 | used to endorse or promote products derived from this software without |
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16 | specific prior written permission. |
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17 | |
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18 | THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" |
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19 | AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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20 | IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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21 | ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE |
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22 | LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
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23 | CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
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24 | SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
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25 | INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
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26 | CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
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27 | ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
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28 | POSSIBILITY OF SUCH DAMAGE. |
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29 | |
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30 | */ |
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31 | |
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32 | #include <string.h> |
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33 | #include <stddef.h> |
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34 | #include <sys/param.h> |
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35 | #include <spu_cache.h> |
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36 | #include <spu_intrinsics.h> |
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37 | #include "ea_internal.h" |
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38 | #include "strncmp.h" |
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39 | #include <ea.h> |
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40 | |
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41 | COMPAT_EA_ALIAS (strcmp_ea); |
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42 | |
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43 | /* |
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44 | * It's not clear what is returned if both strings are equal to |
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45 | * each other up to the length of the shorter string. |
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46 | */ |
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47 | int |
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48 | strcmp_ea (__ea char *s1, __ea const char *s2) |
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49 | { |
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50 | __ea char *curr_s1 = (__ea char *) s1; |
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51 | __ea char *curr_s2 = (__ea char *) s2; |
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52 | void *l_s1; |
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53 | void *l_s2; |
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54 | size_ea_t s2_n; |
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55 | size_ea_t s1_n; |
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56 | int min; |
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57 | int ret; |
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58 | vec_uint4 end_v; |
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59 | |
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60 | while (1) |
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61 | { |
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62 | l_s2 = __cache_fetch (curr_s2); |
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63 | l_s1 = __cache_fetch (curr_s1); |
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64 | /* |
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65 | * Use the smaller of the the space left in s2 cacheline or |
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66 | * the space left in the s1 cacheline. |
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67 | */ |
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68 | s2_n = ROUND_UP_NEXT_128 ((size_ea_t) curr_s2) - (size_ea_t) curr_s2; |
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69 | s1_n = ROUND_UP_NEXT_128 ((size_ea_t) curr_s1) - (size_ea_t) curr_s1; |
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70 | min = MIN (s2_n, s1_n); |
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71 | |
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72 | ret = _strncmp_internal (l_s1, l_s2, min, &end_v, 1); |
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73 | /* |
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74 | * Only the first slot of end_v is set. |
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75 | */ |
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76 | if (ret || spu_extract (end_v, 0)) |
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77 | /* |
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78 | * If any NUL values were seen (end_v values of zero) we still have |
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79 | * to return ret, as it might not be zero. |
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80 | */ |
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81 | return ret; |
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82 | |
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83 | curr_s1 += min; |
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84 | curr_s2 += min; |
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85 | } |
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86 | } |
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