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Make whitespace array more compact #513

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Merged
miloyip merged 1 commit into from
Jan 22, 2016
Merged

Make whitespace array more compact #513

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18 changes: 8 additions & 10 deletions include/rapidjson/reader.h
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Original file line number Diff line number Diff line change
Expand Up @@ -314,16 +314,14 @@ inline const char *SkipWhitespace_SIMD(const char* p) {
return p;

// The rest of string
static const char whitespaces[4][17] = {
" ",
"\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n",
"\r\r\r\r\r\r\r\r\r\r\r\r\r\r\r\r",
"\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t"};

const __m128i w0 = _mm_loadu_si128(reinterpret_cast<const __m128i *>(&whitespaces[0][0]));
const __m128i w1 = _mm_loadu_si128(reinterpret_cast<const __m128i *>(&whitespaces[1][0]));
const __m128i w2 = _mm_loadu_si128(reinterpret_cast<const __m128i *>(&whitespaces[2][0]));
const __m128i w3 = _mm_loadu_si128(reinterpret_cast<const __m128i *>(&whitespaces[3][0]));
#define C16(c) { c, c, c, c, c, c, c, c, c, c, c, c, c, c, c, c }
static const char whitespaces[4][16] = { C16(' '), C16('\n'), C16('\r'), C16('\t') };
#undef C16

const __m128i w0 = _mm_loadu_si128(reinterpret_cast<const __m128i *>(&whitespaces[0][0]));
const __m128i w1 = _mm_loadu_si128(reinterpret_cast<const __m128i *>(&whitespaces[1][0]));
const __m128i w2 = _mm_loadu_si128(reinterpret_cast<const __m128i *>(&whitespaces[2][0]));
const __m128i w3 = _mm_loadu_si128(reinterpret_cast<const __m128i *>(&whitespaces[3][0]));

for (;; p += 16) {
const __m128i s = _mm_load_si128(reinterpret_cast<const __m128i *>(p));
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