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This commit is contained in:
Roberto Ierusalimschy 2002-01-30 15:28:05 -02:00
parent 653977a0ac
commit f856fdeabd
1 changed files with 4 additions and 4 deletions
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8
lobject.c
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@ -35,14 +35,14 @@ int luaO_log2 (unsigned int x) {
7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,
7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,
7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,
7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,
7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7
};
if (x & 0xffff0000) {
if (x & 0xff000000) return log_8[((x>>24) & 0xff) - 1]+24;
if (x >= 0x00010000) {
if (x >= 0x01000000) return log_8[((x>>24) & 0xff) - 1]+24;
else return log_8[((x>>16) & 0xff) - 1]+16;
}
else {
if (x & 0x0000ff00) return log_8[((x>>8) & 0xff) - 1]+8;
if (x >= 0x00000100) return log_8[((x>>8) & 0xff) - 1]+8;
else if (x) return log_8[(x & 0xff) - 1];
return -1; /* special `log' for 0 */
}