1fcb877ac4b05e65f64b9b3199d71dfeaae299177Prashant Patil/* 2fcb877ac4b05e65f64b9b3199d71dfeaae299177Prashant Patil * Copyright (c) 2017 Imagination Technologies. 3fcb877ac4b05e65f64b9b3199d71dfeaae299177Prashant Patil * 4fcb877ac4b05e65f64b9b3199d71dfeaae299177Prashant Patil * All rights reserved. 5fcb877ac4b05e65f64b9b3199d71dfeaae299177Prashant Patil * 6fcb877ac4b05e65f64b9b3199d71dfeaae299177Prashant Patil * Redistribution and use in source and binary forms, with or without 7fcb877ac4b05e65f64b9b3199d71dfeaae299177Prashant Patil * modification, are permitted provided that the following conditions 8fcb877ac4b05e65f64b9b3199d71dfeaae299177Prashant Patil * are met: 9fcb877ac4b05e65f64b9b3199d71dfeaae299177Prashant Patil * 10fcb877ac4b05e65f64b9b3199d71dfeaae299177Prashant Patil * * Redistributions of source code must retain the above copyright 11fcb877ac4b05e65f64b9b3199d71dfeaae299177Prashant Patil * notice, this list of conditions and the following disclaimer. 12fcb877ac4b05e65f64b9b3199d71dfeaae299177Prashant Patil * * Redistributions in binary form must reproduce the above copyright 13fcb877ac4b05e65f64b9b3199d71dfeaae299177Prashant Patil * notice, this list of conditions and the following disclaimer 14fcb877ac4b05e65f64b9b3199d71dfeaae299177Prashant Patil * in the documentation and/or other materials provided with 15fcb877ac4b05e65f64b9b3199d71dfeaae299177Prashant Patil * the distribution. 16fcb877ac4b05e65f64b9b3199d71dfeaae299177Prashant Patil * * Neither the name of Imagination Technologies nor the names of its 17fcb877ac4b05e65f64b9b3199d71dfeaae299177Prashant Patil * contributors may be used to endorse or promote products derived 18fcb877ac4b05e65f64b9b3199d71dfeaae299177Prashant Patil * from this software without specific prior written permission. 19fcb877ac4b05e65f64b9b3199d71dfeaae299177Prashant Patil * 20fcb877ac4b05e65f64b9b3199d71dfeaae299177Prashant Patil * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 21fcb877ac4b05e65f64b9b3199d71dfeaae299177Prashant Patil * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 22fcb877ac4b05e65f64b9b3199d71dfeaae299177Prashant Patil * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 23fcb877ac4b05e65f64b9b3199d71dfeaae299177Prashant Patil * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 24fcb877ac4b05e65f64b9b3199d71dfeaae299177Prashant Patil * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 25fcb877ac4b05e65f64b9b3199d71dfeaae299177Prashant Patil * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 26fcb877ac4b05e65f64b9b3199d71dfeaae299177Prashant Patil * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 27fcb877ac4b05e65f64b9b3199d71dfeaae299177Prashant Patil * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 28fcb877ac4b05e65f64b9b3199d71dfeaae299177Prashant Patil * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 29fcb877ac4b05e65f64b9b3199d71dfeaae299177Prashant Patil * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 30fcb877ac4b05e65f64b9b3199d71dfeaae299177Prashant Patil * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 31fcb877ac4b05e65f64b9b3199d71dfeaae299177Prashant Patil */ 32fcb877ac4b05e65f64b9b3199d71dfeaae299177Prashant Patil 33fcb877ac4b05e65f64b9b3199d71dfeaae299177Prashant Patil#include <string.h> 34fcb877ac4b05e65f64b9b3199d71dfeaae299177Prashant Patil 35fcb877ac4b05e65f64b9b3199d71dfeaae299177Prashant Patil#define op_t unsigned long int 36fcb877ac4b05e65f64b9b3199d71dfeaae299177Prashant Patil#define op_size sizeof (op_t) 37fcb877ac4b05e65f64b9b3199d71dfeaae299177Prashant Patil 38fcb877ac4b05e65f64b9b3199d71dfeaae299177Prashant Patil#if __mips64 39fcb877ac4b05e65f64b9b3199d71dfeaae299177Prashant Patiltypedef struct 40fcb877ac4b05e65f64b9b3199d71dfeaae299177Prashant Patil{ 41fcb877ac4b05e65f64b9b3199d71dfeaae299177Prashant Patil op_t B0:8, B1:8, B2:8, B3:8, B4:8, B5:8, B6:8, B7:8; 42fcb877ac4b05e65f64b9b3199d71dfeaae299177Prashant Patil} bits_t; 43fcb877ac4b05e65f64b9b3199d71dfeaae299177Prashant Patil#else 44fcb877ac4b05e65f64b9b3199d71dfeaae299177Prashant Patiltypedef struct 45fcb877ac4b05e65f64b9b3199d71dfeaae299177Prashant Patil{ 46fcb877ac4b05e65f64b9b3199d71dfeaae299177Prashant Patil op_t B0:8, B1:8, B2:8, B3:8; 47fcb877ac4b05e65f64b9b3199d71dfeaae299177Prashant Patil} bits_t; 48fcb877ac4b05e65f64b9b3199d71dfeaae299177Prashant Patil#endif 49fcb877ac4b05e65f64b9b3199d71dfeaae299177Prashant Patil 50fcb877ac4b05e65f64b9b3199d71dfeaae299177Prashant Patiltypedef union 51fcb877ac4b05e65f64b9b3199d71dfeaae299177Prashant Patil{ 52fcb877ac4b05e65f64b9b3199d71dfeaae299177Prashant Patil op_t v; 53fcb877ac4b05e65f64b9b3199d71dfeaae299177Prashant Patil bits_t b; 54fcb877ac4b05e65f64b9b3199d71dfeaae299177Prashant Patil} bitfields_t; 55fcb877ac4b05e65f64b9b3199d71dfeaae299177Prashant Patil 56fcb877ac4b05e65f64b9b3199d71dfeaae299177Prashant Patil#define DO_BYTE(i) \ 57fcb877ac4b05e65f64b9b3199d71dfeaae299177Prashant Patil if (a.b.B##i != ch) { \ 58fcb877ac4b05e65f64b9b3199d71dfeaae299177Prashant Patil if(a.b.B##i == '\0') return 0; \ 59fcb877ac4b05e65f64b9b3199d71dfeaae299177Prashant Patil p++; \ 60fcb877ac4b05e65f64b9b3199d71dfeaae299177Prashant Patil } else \ 61fcb877ac4b05e65f64b9b3199d71dfeaae299177Prashant Patil return (char *)p; 62fcb877ac4b05e65f64b9b3199d71dfeaae299177Prashant Patil 63fcb877ac4b05e65f64b9b3199d71dfeaae299177Prashant Patil#define DO_WORD(w, cnt) { \ 64fcb877ac4b05e65f64b9b3199d71dfeaae299177Prashant Patil op_t val = w[cnt] ^ mask_c; \ 65fcb877ac4b05e65f64b9b3199d71dfeaae299177Prashant Patil if ((((w[cnt] - mask_1) & ~w[cnt]) & mask_128) || \ 66fcb877ac4b05e65f64b9b3199d71dfeaae299177Prashant Patil (((val - mask_1) & ~val) & mask_128)) { \ 67fcb877ac4b05e65f64b9b3199d71dfeaae299177Prashant Patil return do_bytes(w + cnt, ch); \ 68fcb877ac4b05e65f64b9b3199d71dfeaae299177Prashant Patil } \ 69fcb877ac4b05e65f64b9b3199d71dfeaae299177Prashant Patil} 70fcb877ac4b05e65f64b9b3199d71dfeaae299177Prashant Patil 71fcb877ac4b05e65f64b9b3199d71dfeaae299177Prashant Patilstatic inline char * __attribute__ ((always_inline)) 72fcb877ac4b05e65f64b9b3199d71dfeaae299177Prashant Patildo_bytes (const op_t* w, unsigned char ch) 73fcb877ac4b05e65f64b9b3199d71dfeaae299177Prashant Patil{ 74fcb877ac4b05e65f64b9b3199d71dfeaae299177Prashant Patil bitfields_t a; 75fcb877ac4b05e65f64b9b3199d71dfeaae299177Prashant Patil unsigned char* p = (unsigned char *) w; 76fcb877ac4b05e65f64b9b3199d71dfeaae299177Prashant Patil a.v = *w; 77fcb877ac4b05e65f64b9b3199d71dfeaae299177Prashant Patil#if __mips64 78fcb877ac4b05e65f64b9b3199d71dfeaae299177Prashant Patil DO_BYTE(0) 79fcb877ac4b05e65f64b9b3199d71dfeaae299177Prashant Patil DO_BYTE(1) 80fcb877ac4b05e65f64b9b3199d71dfeaae299177Prashant Patil DO_BYTE(2) 81fcb877ac4b05e65f64b9b3199d71dfeaae299177Prashant Patil DO_BYTE(3) 82fcb877ac4b05e65f64b9b3199d71dfeaae299177Prashant Patil DO_BYTE(4) 83fcb877ac4b05e65f64b9b3199d71dfeaae299177Prashant Patil DO_BYTE(5) 84fcb877ac4b05e65f64b9b3199d71dfeaae299177Prashant Patil DO_BYTE(6) 85fcb877ac4b05e65f64b9b3199d71dfeaae299177Prashant Patil DO_BYTE(7) 86fcb877ac4b05e65f64b9b3199d71dfeaae299177Prashant Patil#else 87fcb877ac4b05e65f64b9b3199d71dfeaae299177Prashant Patil DO_BYTE(0) 88fcb877ac4b05e65f64b9b3199d71dfeaae299177Prashant Patil DO_BYTE(1) 89fcb877ac4b05e65f64b9b3199d71dfeaae299177Prashant Patil DO_BYTE(2) 90fcb877ac4b05e65f64b9b3199d71dfeaae299177Prashant Patil DO_BYTE(3) 91fcb877ac4b05e65f64b9b3199d71dfeaae299177Prashant Patil#endif 92fcb877ac4b05e65f64b9b3199d71dfeaae299177Prashant Patil return (char *)p; 93fcb877ac4b05e65f64b9b3199d71dfeaae299177Prashant Patil} 94fcb877ac4b05e65f64b9b3199d71dfeaae299177Prashant Patil 95fcb877ac4b05e65f64b9b3199d71dfeaae299177Prashant Patilchar* strchr(const char* s, int c) __overloadable 96fcb877ac4b05e65f64b9b3199d71dfeaae299177Prashant Patil{ 97fcb877ac4b05e65f64b9b3199d71dfeaae299177Prashant Patil const op_t *w; 98fcb877ac4b05e65f64b9b3199d71dfeaae299177Prashant Patil op_t mask_1, mask_128, mask_c; 99fcb877ac4b05e65f64b9b3199d71dfeaae299177Prashant Patil const unsigned char ch = c; 100fcb877ac4b05e65f64b9b3199d71dfeaae299177Prashant Patil unsigned char* p = (unsigned char *) s; 101fcb877ac4b05e65f64b9b3199d71dfeaae299177Prashant Patil 102fcb877ac4b05e65f64b9b3199d71dfeaae299177Prashant Patil /* 103fcb877ac4b05e65f64b9b3199d71dfeaae299177Prashant Patil * Check byte by byte till initial alignment 104fcb877ac4b05e65f64b9b3199d71dfeaae299177Prashant Patil */ 105fcb877ac4b05e65f64b9b3199d71dfeaae299177Prashant Patil for ( ; *p != ch && ((size_t) p % op_size) != 0; p++) 106fcb877ac4b05e65f64b9b3199d71dfeaae299177Prashant Patil if (*p == '\0') 107fcb877ac4b05e65f64b9b3199d71dfeaae299177Prashant Patil return 0; 108fcb877ac4b05e65f64b9b3199d71dfeaae299177Prashant Patil 109fcb877ac4b05e65f64b9b3199d71dfeaae299177Prashant Patil if (*p != ch) { 110fcb877ac4b05e65f64b9b3199d71dfeaae299177Prashant Patil w = (const op_t *) p; 111fcb877ac4b05e65f64b9b3199d71dfeaae299177Prashant Patil 112fcb877ac4b05e65f64b9b3199d71dfeaae299177Prashant Patil mask_c = ch | (ch << 8); 113fcb877ac4b05e65f64b9b3199d71dfeaae299177Prashant Patil mask_c |= mask_c << 16; 114fcb877ac4b05e65f64b9b3199d71dfeaae299177Prashant Patil __asm__ volatile ( 115fcb877ac4b05e65f64b9b3199d71dfeaae299177Prashant Patil "li %0, 0x01010101 \n\t" 116fcb877ac4b05e65f64b9b3199d71dfeaae299177Prashant Patil : "=r" (mask_1) 117fcb877ac4b05e65f64b9b3199d71dfeaae299177Prashant Patil ); 118fcb877ac4b05e65f64b9b3199d71dfeaae299177Prashant Patil#if __mips64 119fcb877ac4b05e65f64b9b3199d71dfeaae299177Prashant Patil mask_1 |= mask_1 << 32; 120fcb877ac4b05e65f64b9b3199d71dfeaae299177Prashant Patil mask_c |= mask_c << 32; 121fcb877ac4b05e65f64b9b3199d71dfeaae299177Prashant Patil#endif 122fcb877ac4b05e65f64b9b3199d71dfeaae299177Prashant Patil mask_128 = mask_1 << 7; 123fcb877ac4b05e65f64b9b3199d71dfeaae299177Prashant Patil 124fcb877ac4b05e65f64b9b3199d71dfeaae299177Prashant Patil /* 125fcb877ac4b05e65f64b9b3199d71dfeaae299177Prashant Patil * Check word/dword wize after initial alignment till character match 126fcb877ac4b05e65f64b9b3199d71dfeaae299177Prashant Patil * or end of string 127fcb877ac4b05e65f64b9b3199d71dfeaae299177Prashant Patil */ 128fcb877ac4b05e65f64b9b3199d71dfeaae299177Prashant Patil while (1) { 129fcb877ac4b05e65f64b9b3199d71dfeaae299177Prashant Patil DO_WORD(w, 0) 130fcb877ac4b05e65f64b9b3199d71dfeaae299177Prashant Patil DO_WORD(w, 1) 131fcb877ac4b05e65f64b9b3199d71dfeaae299177Prashant Patil DO_WORD(w, 2) 132fcb877ac4b05e65f64b9b3199d71dfeaae299177Prashant Patil DO_WORD(w, 3) 133fcb877ac4b05e65f64b9b3199d71dfeaae299177Prashant Patil w += 4; 134fcb877ac4b05e65f64b9b3199d71dfeaae299177Prashant Patil } 135fcb877ac4b05e65f64b9b3199d71dfeaae299177Prashant Patil } 136fcb877ac4b05e65f64b9b3199d71dfeaae299177Prashant Patil 137fcb877ac4b05e65f64b9b3199d71dfeaae299177Prashant Patil return (char *)p; 138fcb877ac4b05e65f64b9b3199d71dfeaae299177Prashant Patil} 139