git://sourceware.org / newlib-cygwin.git / blame
| Commit | Line | Data |
|---|---|---|
| c0a99f02 | 1 | /* |
| d85bb55f | 2 | Copyright (c) 2015-2024, Synopsys, Inc. All rights reserved. |
| c0a99f02 AK |
3 | |
| 4 | Redistribution and use in source and binary forms, with or without | |
| 5 | modification, are permitted provided that the following conditions are met: | |
| 6 | ||
| 7 | 1) Redistributions of source code must retain the above copyright notice, | |
| 8 | this list of conditions and the following disclaimer. | |
| 9 | ||
| 10 | 2) Redistributions in binary form must reproduce the above copyright notice, | |
| 11 | this list of conditions and the following disclaimer in the documentation | |
| 12 | and/or other materials provided with the distribution. | |
| 13 | ||
| 14 | 3) Neither the name of the Synopsys, Inc., nor the names of its contributors | |
| 15 | may be used to endorse or promote products derived from this software | |
| 16 | without specific prior written permission. | |
| 17 | ||
| 18 | THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" | |
| 19 | AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
| 20 | IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |
| 21 | ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE | |
| 22 | LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR | |
| 23 | CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF | |
| 24 | SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS | |
| 25 | INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN | |
| 26 | CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) | |
| 27 | ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE | |
| 28 | POSSIBILITY OF SUCH DAMAGE. | |
| 29 | */ | |
| 30 | ||
| 31 | /* This implementation is optimized for performance. For code size a generic | |
| 32 | implementation of this function from newlib/libc/string/strlen.c will be | |
| 33 | used. */ | |
| d85bb55f CZ |
34 | #if !defined (__OPTIMIZE_SIZE__) && !defined (PREFER_SIZE_OVER_SPEED) \ |
| 35 | && !defined (__ARC_RF16__) | |
| c0a99f02 AK |
36 | |
| 37 | #include "asm.h" | |
| 06537f05 AK |
38 | #if (defined (__ARC700__) || defined (__ARCEM__) || defined (__ARCHS__)) \ |
| 39 | && defined (__ARC_NORM__) && defined (__ARC_BARREL_SHIFTER__) | |
| c0a99f02 AK |
40 | |
| 41 | ENTRY (strlen) | |
| 42 | or r3,r0,7 | |
| 43 | ld r2,[r3,-7] | |
| 44 | ld.a r6,[r3,-3] | |
| 45 | mov r4,0x01010101 | |
| 46 | ; uses long immediate | |
| 47 | #ifdef __LITTLE_ENDIAN__ | |
| 48 | asl_s r1,r0,3 | |
| 49 | btst_s r0,2 | |
| 50 | asl r7,r4,r1 | |
| 51 | ror r5,r4 | |
| 52 | sub r1,r2,r7 | |
| 53 | bic_s r1,r1,r2 | |
| 54 | mov.eq r7,r4 | |
| 55 | sub r12,r6,r7 | |
| 56 | bic r12,r12,r6 | |
| 57 | or.eq r12,r12,r1 | |
| 58 | and r12,r12,r5 | |
| 59 | brne r12,0,.Learly_end | |
| 60 | #else /* BIG ENDIAN */ | |
| 61 | ror r5,r4 | |
| 62 | btst_s r0,2 | |
| 63 | mov_s r1,31 | |
| 64 | sub3 r7,r1,r0 | |
| 65 | sub r1,r2,r4 | |
| 66 | bic_s r1,r1,r2 | |
| 67 | bmsk r1,r1,r7 | |
| 68 | sub r12,r6,r4 | |
| 69 | bic r12,r12,r6 | |
| 70 | bmsk.ne r12,r12,r7 | |
| 71 | or.eq r12,r12,r1 | |
| 72 | and r12,r12,r5 | |
| 73 | brne r12,0,.Learly_end | |
| 74 | #endif /* ENDIAN */ | |
| 75 | ||
| 76 | .Loop: | |
| 77 | ld_s r2,[r3,4] | |
| 78 | ld.a r6,[r3,8] | |
| 79 | ; stall for load result | |
| 80 | sub r1,r2,r4 | |
| 81 | bic_s r1,r1,r2 | |
| 82 | sub r12,r6,r4 | |
| 83 | bic r12,r12,r6 | |
| 84 | or_l r12,r12,r1 | |
| 85 | and r12,r12,r5 | |
| 86 | breq_l r12,0,.Loop | |
| 87 | .Lend: | |
| 88 | and.f r1,r1,r5 | |
| 89 | sub.ne r3,r3,4 | |
| 90 | mov.eq r1,r12 | |
| 91 | #ifdef __LITTLE_ENDIAN__ | |
| 92 | sub_s r2,r1,1 | |
| 93 | bic_s r2,r2,r1 | |
| 94 | norm r1,r2 | |
| 95 | sub_s r0,r0,3 | |
| 96 | lsr_s r1,r1,3 | |
| 97 | sub r0,r3,r0 | |
| 98 | j_s.d [blink] | |
| 99 | sub_l r0,r0,r1 | |
| 100 | #else /* BIG ENDIAN */ | |
| 101 | lsr_s r1,r1,7 | |
| 102 | mov.eq r2,r6 | |
| 103 | bic_s r1,r1,r2 | |
| 104 | norm r1,r1 | |
| 105 | sub r0,r3,r0 | |
| 106 | lsr_s r1,r1,3 | |
| 107 | j_s.d [blink] | |
| 108 | add_l r0,r0,r1 | |
| 109 | #endif /* ENDIAN */ | |
| 110 | .Learly_end: | |
| 111 | b.d .Lend | |
| 112 | sub_s.ne r1,r1,r1 | |
| 113 | ENDFUNC (strlen) | |
| 06537f05 AK |
114 | #endif /* (__ARC700__ || __ARCEM__ || __ARCHS__) && __ARC_NORM__ |
| 115 | && __ARC_BARREL_SHIFTER__ */ | |
| c0a99f02 AK |
116 | |
| 117 | #endif /* !__OPTIMIZE_SIZE__ && !PREFER_SIZE_OVER_SPEED */ |