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Merge pull request #513 from miloyip/optimization

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Make whitespace array more compact
This commit is contained in:
Milo Yip 2016-01-22 20:13:58 +08:00
commit 968a666acd
1 changed files with 7 additions and 9 deletions
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16
include/rapidjson/reader.h
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@ -314,16 +314,14 @@ inline const char *SkipWhitespace_SIMD(const char* p) {
return p; return p;
// The rest of string // The rest of string
static const char whitespaces[4][17] = { #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') };
"\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n", #undef C16
"\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 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 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 w2 = _mm_loadu_si128(reinterpret_cast<const __m128i *>(&whitespaces[2][0]));
const __m128i w3 = _mm_loadu_si128(reinterpret_cast<const __m128i *>(&whitespaces[3][0])); const __m128i w3 = _mm_loadu_si128(reinterpret_cast<const __m128i *>(&whitespaces[3][0]));
for (;; p += 16) { for (;; p += 16) {
const __m128i s = _mm_load_si128(reinterpret_cast<const __m128i *>(p)); const __m128i s = _mm_load_si128(reinterpret_cast<const __m128i *>(p));