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Test for SSE3 suppport before using pshufb.

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atdt
2018-03-27 01:33:58 -07:00
committed by Victor Costan
parent 8f469d97e2
commit be490ef9ec
1 changed files with 1 additions and 1 deletions
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snappy.cc
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@@ -183,7 +183,7 @@ inline char* IncrementalCopy(const char* src, char* op, char* const op_limit,
// Handle the uncommon case where pattern is less than 8 bytes. // Handle the uncommon case where pattern is less than 8 bytes.
if (SNAPPY_PREDICT_FALSE(pattern_size < 8)) { if (SNAPPY_PREDICT_FALSE(pattern_size < 8)) {
#if SNAPPY_HAVE_SSE2 #if defined __SSSE3__
// Load the first eight bytes into an 128-bit XMM register, then use PSHUFB // Load the first eight bytes into an 128-bit XMM register, then use PSHUFB
// to permute the register's contents in-place into a repeating sequence of // to permute the register's contents in-place into a repeating sequence of
// the first "pattern_size" bytes. // the first "pattern_size" bytes.