【正文】
s PerfEvtSeln (see [AMD64 Architecture Programmer39。 ERTS_CACHE_LINE_MASK) ? (char *) ((((UWord) states) amp。 char align_gfa[ERTS_ALC_CACHE_LINE_ALIGN_SIZE(sizeof(GFAllctr_t))]。 ... if (cp[7] == c) return (__ptr_t) amp。 /* Instead of the traditional loop which tests each character, we will test a longword at a time. The tricky part is testing if *any of the four* bytes in the longword in question are zero. */ while (n = sizeof (longword)) { longword = *longword_ptr++ ^ charmask。 18 memchr magic_bits = ((unsigned long int) 0x7efefefe 32) | 0xfefefeff。 (cd)。 c) | (~mask amp。 14 消除 Conditional Branch ? 如何消除這個 if語句 if (a b) { r = c。 13 并行執(zhí)行 *op++ = *ref++。 val=8。 if (!(val32)) { r=4。 d+=8。 s+=8。 } e