* config/xtensa/lib2funcs.S (TRAMPOLINE_SIZE): Change from 49 to 59.
* config/xtensa/xtensa-config.h (XCHAL_HAVE_CONST16,
XCHAL_HAVE_L32R): New.
* config/xtensa/xtensa-protos.h (non_const_move_operand,
xtensa_load_constant, xtensa_function_prologue,
xtensa_function_epilogue): Delete prototypes.
(xtensa_expand_prologue): New.
* config/xtensa/xtensa.c (frame_size_const,
TARGET_ASM_FUNCTION_PROLOGUE, TARGET_MACHINE_DEPENDENT_REORG,
non_const_move_operand, xtensa_load_constant, xtensa_reorg,
xtensa_function_prologue): Delete.
(add_operand, xtensa_mem_offset): Formatting.
(move_operand): If the const16 option is available, allow any SFmode
and SImode constants.
(xtensa_emit_move_sequence): Inline the former contents of
xtensa_load_constant with modifications to handle the const16 option.
(override_options): Add xtensa_char_to_class['W'] and set it to
the general register class only if the const16 option is enabled.
Fix formatting. Disallow PIC when using the const16 option.
(print_operand): Reorganize to switch on "letter" instead of the
RTL code. Add output_operand_lossage calls for invalid cases.
Add support for 't' and 'b' letters.
(xtensa_expand_prologue): New function to replace
xtensa_function_prologue and xtensa_reorg.
(xtensa_function_epilogue): Declare this as static. Delete code
to print the retw.n or retw instruction.
(xtensa_return_addr): Use A0_REG instead of 0.
(xtensa_rtx_costs): Add costs for using the const16 option.
* config/xtensa/xtensa.h (MASK_CONST16, TARGET_CONST16): New.
(TARGET_DEFAULT): Add CONST16 if L32R instructions not available.
(TARGET_SWITCHES): Add "const16" and "no-const16".
(REG_CLASS_FROM_LETTER): Add comment about new 'W' letter.
(EXTRA_CONSTRAINT): Change 'T' constraint to only apply when not
using the const16 option.
(TRAMPOLINE_TEMPLATE): Rewrite to avoid hardwired use of l32r insn.
(TRAMPOLINE_SIZE): Change from 49 to 59.
(INITIALIZE_TRAMPOLINE): Adjust offsets to match new trampoline.
(GO_IF_LEGITIMATE_ADDRESS): Do not allow constant pool addresses
when using the const16 option.
(PREDICATE_CODES): Delete non_const_move_operand.
* config/xtensa/xtensa.md (define_constants): Add A1_REG, A8_REG, and
UNSPECV_ENTRY.
(movdi, movdf): If the source is a constant, always expand to a
sequence of movsi insns.
(movdi_internal, movdf_internal): Remove alternative using l32r insns.
(movsi_internal, movsf_internal): Add alternative using const16 insns.
(movsf): Add const16 support.
(entry, prologue, epilogue): New.
(set_frame_ptr): Add missing mode for unspec_volatile operation.
Likewise for subsequent split pattern.
* doc/invoke.texi (Option Summary, Xtensa Options): Document new
"-mconst16" and "-mno-const16" options.
From-SVN: r66809
