* pa-linux.h (ASM_OUTPUT_EXTERNAL_LIBCALL): Define.
	* pa-protos.h (attr_length_millicode_call, attr_length_call,
	pa_init_machine_status): Declare new global functions.
	* pa.c (void copy_fp_args, length_fp_args, get_plabel): Declare and
	implement new functions.
	(attr_length_millicode_call, attr_length_call): Implement.
	(total_code_bytes): Change type to long.
	(pa_output_function_prologue): Compute total_code_bytes on TARGET_64BIT.
	Reset counter if flag_function_sections.
	(output_deferred_plabels): Set output alignment to 3 for TARGET_64BIT.
	(output_cbranch): Move call to gen_label_rtx.
	(output_millicode_call): Rewrite adding long TARGET_64BIT call, expose
	delay slot in all variants, shorten pc-relative calls.
	(output_call): Rewrite adding long TARGET_64BIT call, improved delay
	slot usage and exposure, various new call variants, and shortened
	sequences for some variants on TARGET_PA_20.
	Miscellaneous format changes.
	* pa.h (total_code_bytes): Change type to long.
	(MASK_LONG_CALLS, TARGET_LONG_CALLS, TARGET_LONG_ABS_CALL,
	TARGET_LONG_PIC_SDIFF_CALL, TARGET_LONG_PIC_PCREL_CALL): Define.
	(TARGET_SWITCHES): Add "-mlong-calls" and "-mno-long-calls" options.
	(EXTRA_CONSTRAINT, GO_IF_LEGITIMATE_ADDRESS,
	LEGITIMIZE_RELOAD_ADDRESS): Don't use long floating point loads and
	stores on TARGET_ELF32.
	*pa.md (define_delay): Allow insns in delay on TARGET_PORTABLE_RUNTIME.
	(unnamed patterns for mulsi3, divsi3, udivsi3, modsi3, umodsi3 and
	canonicalize_funcptr_for_compare expanders): Calculate attribute length
	attr_length_millicode_call().
	(call_internal_symref, call_value_internal_symref): Clobber register 1.
	Calculate attribute length using attr_length_call().
	(call_internal_reg_64bit, call_value_internal_reg_64bit): Move gp load
	to delay slot.
	(sibcall, sibcall_value): Rewrite.
	(sibcall_internal_symref, sibcall_value_internal_symref): Clobber
	register 1.  Use attr_length_call().
	(sibcall_internal_symref_64bit, sibcall_value_internal_symref_64bit):
	New patterns.
	(unamed pattern for canonicalize_funcptr_for_compare): Rewrite.
	* som.h (MEMBER_TYPE_FORCES_BLK): Define.
	* t-pa64 (TARGET_LIBGCC2_CFLAGS): Add "-mlong-calls".
	* doc/invoke.texi (mlong-calls): Document.

From-SVN: r58665