53 lines
1.5 KiB
C
53 lines
1.5 KiB
C
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#ifndef SIMDJSON_ARM64_STRINGPARSING_H
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#define SIMDJSON_ARM64_STRINGPARSING_H
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#include "../stringparsing.h"
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#ifdef IS_ARM64
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#include "arm64/architecture.h"
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namespace simdjson::arm64 {
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really_inline parse_string_helper find_bs_bits_and_quote_bits(const uint8_t *src, 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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#include "generic/stringparsing.h"
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}
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// namespace simdjson::amd64
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#endif // IS_ARM64
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#endif
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