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Diffstat (limited to 'newlib/libc/machine/spu/strcpy.h')
| -rw-r--r-- | newlib/libc/machine/spu/strcpy.h | 185 |
1 files changed, 0 insertions, 185 deletions
diff --git a/newlib/libc/machine/spu/strcpy.h b/newlib/libc/machine/spu/strcpy.h deleted file mode 100644 index 9040575ec..000000000 --- a/newlib/libc/machine/spu/strcpy.h +++ /dev/null @@ -1,185 +0,0 @@ -/* - (C) Copyright 2008 - International Business Machines 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 "vec_literal.h" -#include <string.h> - -/* - * Supply an inline _strncpy for strcpy/cat and strncpy/cat. Relies on - * checklen and lastzero code being optimized out when they are constant - * zero values. - */ -static inline void * _strncpy(char * __restrict__ dest, const char * - __restrict__ src, size_t maxlen, int - checklen, int lastzero) -{ - int adjust, offset, soffset, doffset, shift; - vec_uchar16 *vsrc, *vdest; - vec_uchar16 sdata1, sdata2, sdata, shuffle; - vec_uchar16 mask1, maskzero, cmp0; - vec_uint4 nonzeroes, gathered_cmp, vtmp, vtmp2; - vec_uint4 curlen; /* assumes size_t is 4 bytes */ - const vec_uint4 val31 = { 31, 31, 31, 31 }; - const vec_uint4 val_0123 = { 0x00010203, 0x04050607, 0x08090A0B, 0x0C0D0E0F }; - const vec_uchar16 all_ones = { 0xff,0xff,0xff,0xff, 0xff,0xff,0xff,0xff, - 0xff,0xff,0xff,0xff, 0xff,0xff,0xff,0xff }; - - vsrc = (vec_uchar16 *) src; - vdest = (vec_uchar16 *) dest; - soffset = (int) src & 15; - doffset = (int) dest & 15; - - if (checklen) { - /* - * Set curlen so it is the number of bytes we would copy if starting - * from vdest & ~0xf. - * - * curlen could probably be replaced by comparing vdest plus some - * offset to dest + maxlen, that would help mainly in the while loop - * but would lose only one instruction (the curlen -= 16). - */ - curlen = spu_splats((unsigned int) (maxlen + doffset)); - } - - /* - * Setup a shuffle pattern to align the source string with the - * alignment of the destination string. - */ - vtmp = spu_cmpgt(spu_promote(doffset, 0), spu_promote(soffset, 0)); - adjust = spu_extract(vtmp, 0); - offset = soffset - doffset; - offset += adjust & 16; - shuffle = spu_splats((unsigned char) offset); - shuffle = (vec_uchar16) spu_add((vec_uint4) shuffle, val_0123); - - vsrc += adjust; - sdata1 = *vsrc++; - sdata2 = *vsrc++; - sdata = spu_shuffle(sdata1, sdata2, shuffle); - - /* - * mask out leading bytes - */ - mask1 = spu_rlmaskqwbyte(all_ones, -doffset); - - cmp0 = spu_and(mask1, spu_cmpeq(sdata, 0)); - nonzeroes = spu_cntlz(spu_gather(cmp0)); - /* - * First element of nonzeroes - 15 is the number of leading non-zero - * bytes plus 1 for the zero byte. - */ - if (checklen) { - vtmp = spu_add(curlen, 15); - vtmp2 = spu_cmpgt(nonzeroes, vtmp); - nonzeroes = spu_sel(nonzeroes, vtmp, vtmp2); - } - - vtmp = spu_cmpgt(nonzeroes, val31); - /* - * Note: using immediate (constant 31) vs a vector value (val31) does - * not give different results, and we have to have a vector val31 for - * the spu_sel below, so use val31 everywhere. - */ - vtmp = spu_sel(nonzeroes, val31, vtmp); - /* - * So vtmp is now min(nonzeroes, 31), the number of bytes + 16 that we - * want to copy from the first 16 bytes of the source. - */ - if (checklen) { - curlen = spu_sub(vtmp, curlen); - curlen = spu_sub(15, curlen); - } - - /* - * We want a right shift 0xff with fill by ones of (vtmp - 15) bytes, but - * that doesn't exist so use spu_slqwbyte and vtmp all ones left by - * (31 - vtmp). Note: this can also use spu_rlqwbytebc with spu_rlqw. - */ - shift = spu_extract(spu_sub(val31, vtmp), 0); - maskzero = spu_slqwbyte(all_ones, shift); - maskzero = spu_and(mask1, maskzero); - *vdest = spu_sel(*vdest, sdata, maskzero); - - vtmp = spu_cmpgt(nonzeroes, val31); - if (checklen) { - vtmp2 = spu_cmpgt(curlen, 0); - vtmp = spu_and(vtmp, vtmp2); - } - if (spu_extract(vtmp, 0)) { - sdata1 = sdata2; - sdata2 = *vsrc++; - sdata = spu_shuffle(sdata1, sdata2, shuffle); - cmp0 = spu_cmpeq(sdata, 0); - gathered_cmp = spu_gather(cmp0); - /* - * Copy 16 bytes at a time. - */ - while ((spu_extract(gathered_cmp, 0) == 0) && - (!checklen || (spu_extract(curlen, 0) > 15))) { - if (checklen) - curlen = spu_add(curlen, -16); - *++vdest = sdata; - sdata1 = sdata2; - sdata2 = *vsrc++; - sdata = spu_shuffle(sdata1, sdata2, shuffle); - cmp0 = spu_cmpeq(sdata, 0); - gathered_cmp = spu_gather(cmp0); - } - /* - * Copy 0 to 15 trailing bytes, either up to the smaller of curlen or - * the number of non-zero bytes. - */ - nonzeroes = spu_cntlz(gathered_cmp); - if (checklen) { - vtmp = spu_add(curlen, 15); - vtmp2 = spu_cmpgt(nonzeroes, vtmp); - nonzeroes = spu_sel(nonzeroes, vtmp, vtmp2); - curlen = spu_sub(nonzeroes, curlen); - curlen = spu_sub(15, curlen); - } - shift = spu_extract(spu_sub(val31, nonzeroes), 0); - maskzero = spu_slqwbyte(all_ones, shift); - ++vdest; - *vdest = spu_sel(*vdest, sdata, maskzero); - } - - if (checklen && lastzero) { - /* - * For strncat. - */ - dest[maxlen - spu_extract(curlen, 0)] = '\0'; - } - - /* Pad null bytes if the length of the "src" is less than "n" (strncpy). */ - if (checklen && !lastzero && spu_extract(curlen, 0)) - memset(dest + maxlen - spu_extract(curlen, 0), 0, spu_extract(curlen, 0)); - return (dest); -} |