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https://github.com/simdjson/simdjson
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c2eea8abba
* massive clang-format -style=LLVM * naming harmonization * adding commentary about sysinfoapi.h
57 lines
2.0 KiB
C++
57 lines
2.0 KiB
C++
#ifndef SIMDJSON_STRINGPARSING_ARM64_H
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#define SIMDJSON_STRINGPARSING_ARM64_H
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#include "simdjson/stringparsing.h"
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#include "simdjson/stringparsing_macros.h"
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#ifdef IS_ARM64
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namespace simdjson {
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template <>
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really_inline parse_string_helper
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find_bs_bits_and_quote_bits<Architecture::ARM64>(const uint8_t *src,
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uint8_t *dst) {
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// this can read up to 31 bytes beyond the buffer size, but we require
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// SIMDJSON_PADDING of padding
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static_assert(2 * sizeof(uint8x16_t) - 1 <= SIMDJSON_PADDING);
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uint8x16_t v0 = vld1q_u8(src);
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uint8x16_t v1 = vld1q_u8(src + 16);
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vst1q_u8(dst, v0);
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vst1q_u8(dst + 16, v1);
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uint8x16_t bs_mask = vmovq_n_u8('\\');
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uint8x16_t qt_mask = vmovq_n_u8('"');
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const uint8x16_t bit_mask = {0x01, 0x02, 0x4, 0x8, 0x10, 0x20, 0x40, 0x80,
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0x01, 0x02, 0x4, 0x8, 0x10, 0x20, 0x40, 0x80};
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uint8x16_t cmp_bs_0 = vceqq_u8(v0, bs_mask);
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uint8x16_t cmp_bs_1 = vceqq_u8(v1, bs_mask);
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uint8x16_t cmp_qt_0 = vceqq_u8(v0, qt_mask);
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uint8x16_t cmp_qt_1 = vceqq_u8(v1, qt_mask);
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cmp_bs_0 = vandq_u8(cmp_bs_0, bit_mask);
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cmp_bs_1 = vandq_u8(cmp_bs_1, bit_mask);
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cmp_qt_0 = vandq_u8(cmp_qt_0, bit_mask);
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cmp_qt_1 = vandq_u8(cmp_qt_1, bit_mask);
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uint8x16_t sum0 = vpaddq_u8(cmp_bs_0, cmp_bs_1);
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uint8x16_t sum1 = vpaddq_u8(cmp_qt_0, cmp_qt_1);
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sum0 = vpaddq_u8(sum0, sum1);
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sum0 = vpaddq_u8(sum0, sum0);
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return {
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vgetq_lane_u32(vreinterpretq_u32_u8(sum0), 0), // bs_bits
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vgetq_lane_u32(vreinterpretq_u32_u8(sum0), 1) // quote_bits
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};
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}
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template <>
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WARN_UNUSED ALLOW_SAME_PAGE_BUFFER_OVERRUN_QUALIFIER LENIENT_MEM_SANITIZER
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really_inline bool
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parse_string<Architecture::ARM64>(UNUSED const uint8_t *buf,
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UNUSED size_t len, ParsedJson &pj,
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UNUSED const uint32_t depth,
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UNUSED uint32_t offset) {
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PARSE_STRING(Architecture::ARM64, buf, len, pj, depth, offset);
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}
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} // namespace simdjson
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#endif
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#endif
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