invoke.texi: Document -mvr4130-align.

invoke.texi: Document -mvr4130-align.

	* doc/invoke.texi: Document -mvr4130-align.
	* config/mips/mips.h (MASK_VR4130_ALIGN, TARGET_VR4130_ALIGN)
	(TUNE_MIPS4120, TUNE_MIPS4130): New macros.
	(TUNE_MACC_CHAINS): Include TUNE_MIPS4120 and TUNE_MIPS4130.
	(TARGET_SWITCHES): Add -mvr4130-align and -mno-vr4130-align.
	* config/mips/mips.md: Include sched-int.h.
	(USEFUL_INSN_P, SEQ_BEGIN, SEQ_END, FOR_EACH_SUBINSN): New macros.
	(mips_rtx_costs): Set integer multiplication costs for TUNE_MIPS4130.
	(override_options): Enable -mvr4130-align at -O3 and above.
	(mips_sim_insn): New variable.
	(mips_sim): New structure.
	(mips_sim_reset, mips_sim_init, mips_sim_next_cycle, mips_sim_wait_reg)
	(mips_sim_wait_regs_2, mips_sim_wait_regs_1, mips_sim_wait_regs)
	(mips_sim_wait_units, mips_sim_wait_insn, mips_sim_record_set)
	(mips_sim_issue_insn, mips_sim_issue_nop, mips_sim_finish_insn)
	(vr4130_avoid_branch_rt_conflict, vr4130_align_insns): New functions.
	(mips_reorg): Call vr4130_align_insns.
	(vr4130_last_insn): New variable.
	(vr4130_true_reg_dependence_p_1, vr4130_true_reg_dependence_p)
	(vr4130_swap_insns_p, vr4130_reorder): New functions.
	(mips_sched_reorder, mips_variable_issue): Hook in vr4130 code.
	(mips_issue_rate): Return 2 for PROCESSOR_R4130.
	(mips_use_dfa_pipeline_interface): Return true for the same.
	* config/mips/4130.md: New file.
	* config/mips/mips.md: Include it.  Add a peephole2 to convert
	"mult;mflo" into "mtlo;macc".
	(*macc, *umul_acc_di, *smul_acc_di): Use $1 rather than $0 as the
	target of maccs.
	(*msac_using_macc): New pattern.

From-SVN: r81567