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This commit is contained in:
Behdad Esfahbod 2012-04-15 14:12:13 -04:00
parent 683b503f30
commit e74616b889
1 changed files with 8 additions and 0 deletions
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8
src/hb-private.hh
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@ -440,6 +440,14 @@ static inline uint16_t hb_be_uint16 (const uint16_t v)
return (uint16_t) (V[0] << 8) + V[1];
}
/* Note, of the following macros, uint16_get is the one called many many times.
* If there is any optimizations to be done, it's in that macro. However, I
* already confirmed that on my T400 ThinkPad at least, using bswap_16(), which
* results in a single ror instruction, does NOT speed this up. In fact, it
* resulted in a minor slowdown. At any rate, note that v may not be correctly
* aligned, so I think the current implementation is optimal.
*/
#define hb_be_uint16_put(v,V) HB_STMT_START { v[0] = (V>>8); v[1] = (V); } HB_STMT_END
#define hb_be_uint16_get(v) (uint16_t) ((v[0] << 8) + v[1])
#define hb_be_uint16_eq(a,b) (a[0] == b[0] && a[1] == b[1])