mirror of
https://github.com/VectorCamp/vectorscan.git
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65 lines
2.5 KiB
C++
65 lines
2.5 KiB
C++
/*
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* Copyright (c) 2015-2017, Intel Corporation
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* Copyright (c) 2020-2021, VectorCamp PC
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* * Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* * Neither the name of Intel Corporation nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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template <>
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really_really_inline
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const u8 *firstMatch<16>(const u8 *buf, SuperVector<16> v) {
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SuperVector<16>::movemask_type z = v.movemask();
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DEBUG_PRINTF("buf %p z %08x \n", buf, z);
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DEBUG_PRINTF("z %08x\n", z);
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if (unlikely(z != 0xffff)) {
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u32 pos = ctz32(~z & 0xffff);
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DEBUG_PRINTF("~z %08x\n", ~z);
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DEBUG_PRINTF("match @ pos %u\n", pos);
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assert(pos < 16);
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return buf + pos;
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} else {
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return NULL; // no match
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}
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}
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template <>
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really_really_inline
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const u8 *lastMatch<16>(const u8 *buf, SuperVector<16> v) {
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SuperVector<16>::movemask_type z = v.movemask();
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DEBUG_PRINTF("buf %p z %08x \n", buf, z);
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DEBUG_PRINTF("z %08x\n", z);
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if (unlikely(z != 0xffff)) {
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u32 pos = clz32(~z & 0xffff);
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DEBUG_PRINTF("~z %08x\n", ~z);
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DEBUG_PRINTF("match @ pos %u\n", pos);
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assert(pos >= 16 && pos < 32);
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return buf + (31 - pos);
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} else {
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return NULL; // no match
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}
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}
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