Author: mikej Date: Tue May 15 13:22:49 2007 New Revision: 5186 Modified: freeswitch/trunk/libs/js/nsprpub/pr/src/misc/pratom.c Log: fix the fallback atomic operation implementation for use on arm devices. Modified: freeswitch/trunk/libs/js/nsprpub/pr/src/misc/pratom.c ============================================================================== --- freeswitch/trunk/libs/js/nsprpub/pr/src/misc/pratom.c (original) +++ freeswitch/trunk/libs/js/nsprpub/pr/src/misc/pratom.c Tue May 15 13:22:49 2007 @@ -54,6 +54,50 @@ */ #if !defined(_PR_HAVE_ATOMIC_OPS) +#include "prbit.h" + +/* +** Compute the log of the least power of 2 greater than or equal to n +*/ +PR_IMPLEMENT(PRIntn) PR_CeilingLog2(PRUint32 n) +{ + PRIntn log2 = 0; + + if (n & (n-1)) + log2++; + if (n >> 16) + log2 += 16, n >>= 16; + if (n >> 8) + log2 += 8, n >>= 8; + if (n >> 4) + log2 += 4, n >>= 4; + if (n >> 2) + log2 += 2, n >>= 2; + if (n >> 1) + log2++; + return log2; +} + +/* +** Compute the log of the greatest power of 2 less than or equal to n. +** This really just finds the highest set bit in the word. +*/ +PR_IMPLEMENT(PRIntn) PR_FloorLog2(PRUint32 n) +{ + PRIntn log2 = 0; + + if (n >> 16) + log2 += 16, n >>= 16; + if (n >> 8) + log2 += 8, n >>= 8; + if (n >> 4) + log2 += 4, n >>= 4; + if (n >> 2) + log2 += 2, n >>= 2; + if (n >> 1) + log2++; + return log2; +} #if defined(_PR_PTHREADS) && !defined(_PR_DCETHREADS) /*