(cpu): Add r4600.

(cpu): Add r4600.

(define_function_unit): Correct numerous errors.  Add r4600.
(adddi3*, subdi3*, mulsidi3, umulsidi3, negdi2*, one_cmpdl2*,
nordi2*, anddi2*, iordi3*, xordi3*, movdi*, ashldi3*, ashrdi3*,
lshrdi3*, seq, sne, sgt, sge, slt, sle, sgtu, sgeu, sltu, sleu,
indirect_jump, tablejump, call*, call_value*): Add 64 bit support.
(adddi3_internal_3, addsi3_internal_2, subdi3_internal_3,
subsi3_internal_2, muldi3, muldi3_internal, divmoddi4, udivmoddi4,
divdi3, moddi3, udivdi3, umoddi3, absdi3, ffsdi2,
negdi2_internal_2, anddi3_internal1, xordi3_immed, truncdisi2,
truncdihi2, truncdiqi2, zero_extendsidi2,
zero_extendsidi2_interal, zero_extendhidi2, zero_extendqidi2,
extendsidi2, extendhidi2, extendhidi2_internal, extendqidi2,
extendqidi2_insn, fix_truncdfdi2, fix_truncsfdi2, floatdidf2,
floatdisf2, fixuns_truncdfdi2, fixuns_truncdfsi2,
ashldi3_internal4, ashrdi3_internal_4, lshrdi3_internal4, cmpdi,
tstdi, branch_zero_di, branch_equality_di, seq_di_zero, seq_di,
sne_di_zero, sne_di, sgt_di, sge_di, slt_di, sle_di_const,
sle_di_reg, sgtu_di, sgeu_di, sltu_di, sleu_di_const, sleu_di_reg,
indirect_jump_internal1, indirect_jump_internal2,
tablejump_internal1, tablejump_internal2): New patterns.
(mulsi3): Add missing mips_move_1word parameter.
(mulsi3+1): Don't split on r4000.
(divmodsi4, udivmodsi4, udivsi3, umodsi3): Correct lengths.
(divsi3, modsi3, udivsi3, umodsi3): Allow constant operands.
(sqrtdf2, sqrtsf2): Correct type attribute.
(abssi2): Add mips2 support.
(movsi_unaligned, movsi_ulw, movsi_usw): Comment out.
(movsf, movdf): Use F not E.
(cmpdf, cmpsf, branch_fp*, s{eq,ne,lt,le,gt,ge}_[ds]f): Depend on
TARGET_HARD_FLOAT.

From-SVN: r6393