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Diffstat (limited to 'newlib/libc/machine/spu/strncmp.h')
| -rw-r--r-- | newlib/libc/machine/spu/strncmp.h | 155 |
1 files changed, 0 insertions, 155 deletions
diff --git a/newlib/libc/machine/spu/strncmp.h b/newlib/libc/machine/spu/strncmp.h deleted file mode 100644 index f464564bc..000000000 --- a/newlib/libc/machine/spu/strncmp.h +++ /dev/null @@ -1,155 +0,0 @@ -/* - (C) Copyright 2001,2006,2008 - International Business Machines Corporation, - Sony Computer Entertainment, Incorporated, - Toshiba Corporation, - - All rights reserved. - - Redistribution and use in source and binary forms, with or without - modification, are permitted provided that the following conditions are met: - - * Redistributions of source code must retain the above copyright notice, - this list of conditions and the following disclaimer. - * Redistributions in binary form must reproduce the above copyright - notice, this list of conditions and the following disclaimer in the - documentation and/or other materials provided with the distribution. - * Neither the names of the copyright holders nor the names of their - contributors may be used to endorse or promote products derived from this - software without specific prior written permission. - - THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" - AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE - IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE - ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE - LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR - CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF - SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS - INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN - CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) - ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE - POSSIBILITY OF SUCH DAMAGE. -*/ -#include <spu_intrinsics.h> -#include <stddef.h> - -/* - * Internal _strncmp_internal for strncmp and memcmp: - * - * Compare the two strings s1 and s2 of length n. Returns an integer less - * than, equal to, or greater than zero if s1 is found, respectively, - * to be less than, to match, or be greater than s2. Check for zero bytes - * only if check_zeroes is set. In additin, the vector value *end_v will - * contain all zeroes if we hit a NUL character that caused the comparison - * to complete, *end_v is modified only if check_zeroes is set. - */ -static inline int -_strncmp_internal(const char *s1, const char *s2, size_t n, vec_uint4 - *end_v, int check_zeroes) -{ - unsigned int offset1, offset2; - vec_int4 n_v; - vec_uint4 cnt1_v, cnt2_v, max_cnt_v; - vec_uint4 gt_v, lt_v, mask_v, end1_v, end2_v, neq_v, tmp1_v; - vec_uint4 shift_n_v, shift_eos_v, max_shift_v; - vec_uchar16 shuffle1, shuffle2; - vec_uchar16 data1A, data1B, data1, data2A, data2B, data2; - vec_uchar16 *ptr1, *ptr2; - - data1 = data2 = spu_splats((unsigned char)0); - - ptr1 = (vec_uchar16 *)s1; - ptr2 = (vec_uchar16 *)s2; - - offset1 = (unsigned int)(ptr1) & 15; - offset2 = (unsigned int)(ptr2) & 15; - - shuffle1 = (vec_uchar16) - spu_add((vec_uint4)spu_splats((unsigned char)offset1), - ((vec_uint4) {0x00010203, 0x04050607, 0x08090A0B, 0x0C0D0E0F})); - shuffle2 = (vec_uchar16) - spu_add((vec_uint4)spu_splats((unsigned char)offset2), - ((vec_uint4) {0x00010203, 0x04050607, 0x08090A0B, 0x0C0D0E0F})); - data1A = *ptr1++; - data2A = *ptr2++; - - n_v = spu_promote((int)n, 0); - - do { - data1B = *ptr1++; - data2B = *ptr2++; - - /* - * Quadword align each of the input strings so that we operate on full - * quadwords. - */ - data1 = spu_shuffle(data1A, data1B, shuffle1); - data2 = spu_shuffle(data2A, data2B, shuffle2); - - data1A = data1B; - data2A = data2B; - - neq_v = spu_gather(spu_xor(spu_cmpeq(data1, data2), -1)); - - if (check_zeroes) { - end1_v = spu_gather(spu_cmpeq(data1, 0)); - end2_v = spu_gather(spu_cmpeq(data2, 0)); - *end_v = spu_or(end1_v, end2_v); - } - - n_v = spu_add(n_v, -16); - - /* - * Repeat until either - * 1) the character count expired - * 2) check_zeroes is set and a null character is discovered in one of - * the input strings - * 3) the strings do not compare equal - */ - if (check_zeroes) { - tmp1_v = spu_or(*end_v, neq_v); - tmp1_v = spu_cmpeq(tmp1_v, 0); - } else { - tmp1_v = spu_cmpeq(neq_v, 0); - } - tmp1_v = spu_and(tmp1_v, spu_cmpgt(n_v, 0)); - } while (spu_extract(tmp1_v, 0)); - - /* - * Construct a mask to eliminate characters that are not of interest - * in the comparison. - */ - mask_v = spu_splats((unsigned int)0xFFFF); - shift_n_v = - spu_andc((__vector unsigned int)spu_sub(0, n_v), spu_cmpgt(n_v, -1)); - if (check_zeroes) { - cnt1_v = spu_cntlz(end1_v); - cnt2_v = spu_cntlz(end2_v); - max_cnt_v = spu_sel(cnt1_v, cnt2_v, spu_cmpgt(cnt2_v, cnt1_v)); - shift_eos_v = spu_sub(32, max_cnt_v); - max_shift_v = - spu_sel(shift_n_v, shift_eos_v, spu_cmpgt(shift_eos_v, shift_n_v)); - mask_v = spu_and(spu_sl(mask_v, spu_extract(max_shift_v, 0)), mask_v); - } else { - mask_v = spu_and(spu_sl(mask_v, spu_extract(shift_n_v, 0)), mask_v); - } - - /* - * Determine if greater then or less then in the case that they are - * not equal. gt_v is either 1 (in the case s1 is greater then s2), or - * -1 (in the case that s2 is greater then s1). - * - * There are no byte vector math instructions, so we can't subtract - * data1 from data2. - */ - gt_v = spu_gather(spu_cmpgt(data1, data2)); - lt_v = spu_gather(spu_cmpgt(data2, data1)); - gt_v = spu_sub(-1, spu_sl(spu_cmpgt(gt_v, lt_v), 1)); - - /* - * Construct a mask to be applied to gt_v if the strings are discovered - * to be equal. - */ - mask_v = spu_cmpeq(spu_and(neq_v, mask_v), 0); - return (spu_extract(spu_andc(gt_v, mask_v), 0)); -} |