1*4882a593Smuzhiyun2012/03/30 - Mark Hatle <mark.hatle@windriver.com> 2*4882a593Smuzhiyun - Initial version 3*4882a593Smuzhiyun 4*4882a593SmuzhiyunMost of the items for the X86 architectures are defined in the single 5*4882a593Smuzhiyunarch-x86 file. 6*4882a593Smuzhiyun 7*4882a593SmuzhiyunThree ABIs are define, m32, mx32 and m64. 8*4882a593Smuzhiyun 9*4882a593SmuzhiyunThe following is the list of X86 specific variables: 10*4882a593Smuzhiyun 11*4882a593SmuzhiyunX86ARCH32 - This is the 32-bit architecture GNU canonical arch, TUNE_ARCH. 12*4882a593Smuzhiyun 13*4882a593SmuzhiyunX86ARCH64 - This is the 64-bit architecture GNU canonical arch, TUNE_ARCH. 14*4882a593Smuzhiyun 15*4882a593SmuzhiyunThe TUNE_PKGARCH is defined as follows: 16*4882a593Smuzhiyun 17*4882a593SmuzhiyunTUNE_PKGARCH = ${TUNE_PKGARCH:tune-${DEFAULTTUNE}} 18*4882a593Smuzhiyun 19*4882a593SmuzhiyunThe package architecture for 32-bit targets is historical and generally 20*4882a593Smuzhiyunset to to match the core compatible processor type, i.e. i386. 21*4882a593Smuzhiyun 22*4882a593SmuzhiyunFor 64-bit architectures, the architecture is expected to end in '_64'. 23*4882a593Smuzhiyun 24*4882a593SmuzhiyunIf the x32 ABI is used, then the _64 is further extended with a '_x32'. 25