* i386.c (ix86_attr_length_default): Handle TYPE_STR and TYPE_CLD.
* i386.md (FIRST_PSEUDO_REGISTER): Set to 20.
(FIXED_REGISTERS): Set dirflag as fixed.
(CALL_USED_REGISTERS): Set dirflag as used.
(REG_ALLOC_ORDER): Set dirflag as last one.
(DIRFLAG_REG): New macro.
(MD_ASM_CLOBBERS): Asm clobber dirflag for backward compatibility.
(HI_REGISTER_NAMES): Add dirflag.
(DEBUF_PRINT_REG): Handle dirflag.
* i386.md (type attribute): New cld and str types.
(length_opcode attribute): Set cld and str to 1.
(memory attribute): Set str to unknown - it is not clear from the
patterns.
(pent_np function unit): Prefixed string operations takes 12 cycles
minimally; cld takes 2 cycles.
(ppro_uops attribute): Str is "many" and cld is "few".
(ppro_p0 unit): Handle cld here.
(k6_alux unit): Handle cld and str types.
(k6_load unit): It is ocupied by str opcodes.
(k6_store unit): It is ocupied by str opcodes.
(athlon_decode): Str is vector decoded.
(athlon_ieu): Handle str and cld.
(cld pattern): New.
(movstrsi, clrstr, cmpstr, strlen expander): Emit cld instruction
(movstrsi_1, clrstrsi_1, cmpstrsi_1, strlensi_1,
cmpstrsi_nz_1 insn): Do not output cld instruction
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@31326
138bc75d-0d04-0410-961f-
82ee72b054a4