* mn10300.h (REG_CLASS_FROM_LETTER): Map 'y' to SP_REGS.
Handle 'x' as NO_REGS for this cpu.
(REGNO_OK_FOR_BIT_BASE_P): Define.
(REG_OK_FOR_BIT_BASE_P): Define.
(GO_IF_LEGITIMATE_ADDRESS): Use them.
(REG_OK_FOR_INDEX_P): Tweak.
* mn13000.c (REG_SAVE_BYTES): Define.
(expand_epilogue, initial_offset): Use it.
(secondary_reload_class): Slightly reformat.
(output_tst): Tweak comments.
* mn10300.md: Change 'x' to 'y' for SP_REGS. Then add 'x' to many
patterns.
(addsi3): Turn into a define_expand/define_insn pair. Rework code for
three operand addition case to be more efficient.
(subsi3): Turn into a define_expand/define_insn pair.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@21104
138bc75d-0d04-0410-961f-
82ee72b054a4