| 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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