K 10 svn:author V 7 davidxu K 8 svn:date V 27 2006-08-15T12:45:51.000000Z K 7 svn:log V 176 Because fuword on AMD64 returns 64bit long integer -1 on fault, clear entire %rax to zero instead of only clearing %eax, otherwise it will leave garbage data in upper 32 bits. END