1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
|
--- gcc/config/avr/avr.md.orig Sat Mar 19 16:45:41 2005
+++ gcc/config/avr/avr.md Thu Mar 2 09:45:36 2006
@@ -346,69 +346,75 @@
;;=========================================================================
;; move string (like memcpy)
-;; implement as RTL loop
(define_expand "movstrhi"
[(parallel [(set (match_operand:BLK 0 "memory_operand" "")
- (match_operand:BLK 1 "memory_operand" ""))
- (use (match_operand:HI 2 "const_int_operand" ""))
- (use (match_operand:HI 3 "const_int_operand" ""))])]
+ (match_operand:BLK 1 "memory_operand" ""))
+ (use (match_operand:HI 2 "const_int_operand" ""))
+ (use (match_operand:HI 3 "const_int_operand" ""))
+ (clobber (match_scratch:HI 4 ""))
+ (clobber (match_scratch:HI 5 ""))
+ (clobber (match_dup 6))])]
""
"{
- int prob;
- HOST_WIDE_INT count;
+ rtx addr0, addr1;
+ int cnt8;
enum machine_mode mode;
- rtx label = gen_label_rtx ();
- rtx loop_reg;
- rtx jump;
-
- /* Copy pointers into new psuedos - they will be changed. */
- rtx addr0 = copy_to_mode_reg (Pmode, XEXP (operands[0], 0));
- rtx addr1 = copy_to_mode_reg (Pmode, XEXP (operands[1], 0));
-
- /* Create rtx for tmp register - we use this as scratch. */
- rtx tmp_reg_rtx = gen_rtx_REG (QImode, TMP_REGNO);
if (GET_CODE (operands[2]) != CONST_INT)
FAIL;
-
- count = INTVAL (operands[2]);
- if (count <= 0)
- FAIL;
-
- /* Work out branch probability for latter use. */
- prob = REG_BR_PROB_BASE - REG_BR_PROB_BASE / count;
-
- /* See if constant fit 8 bits. */
- mode = (count < 0x100) ? QImode : HImode;
- /* Create loop counter register. */
- loop_reg = copy_to_mode_reg (mode, gen_int_mode (count, mode));
-
- /* Now create RTL code for move loop. */
- /* Label at top of loop. */
- emit_label (label);
-
- /* Move one byte into scratch and inc pointer. */
- emit_move_insn (tmp_reg_rtx, gen_rtx_MEM (QImode, addr1));
- emit_move_insn (addr1, gen_rtx_PLUS (Pmode, addr1, const1_rtx));
-
- /* Move to mem and inc pointer. */
- emit_move_insn (gen_rtx_MEM (QImode, addr0), tmp_reg_rtx);
- emit_move_insn (addr0, gen_rtx_PLUS (Pmode, addr0, const1_rtx));
-
- /* Decrement count. */
- emit_move_insn (loop_reg, gen_rtx_PLUS (mode, loop_reg, constm1_rtx));
-
- /* Compare with zero and jump if not equal. */
- emit_cmp_and_jump_insns (loop_reg, const0_rtx, NE, NULL_RTX, mode, 1,
- label);
- /* Set jump probability based on loop count. */
- jump = get_last_insn ();
- REG_NOTES (jump) = gen_rtx_EXPR_LIST (REG_BR_PROB,
- GEN_INT (prob),
- REG_NOTES (jump));
- DONE;
+ cnt8 = byte_immediate_operand (operands[2], GET_MODE (operands[2]));
+ mode = cnt8 ? QImode : HImode;
+ operands[2] = copy_to_mode_reg (mode,
+ gen_int_mode (INTVAL (operands[2]), mode));
+ addr0 = copy_to_mode_reg (Pmode, XEXP (operands[0], 0));
+ addr1 = copy_to_mode_reg (Pmode, XEXP (operands[1], 0));
+
+ operands[6] = gen_rtx_SCRATCH (mode);
+ operands[0] = gen_rtx (MEM, BLKmode, addr0);
+ operands[1] = gen_rtx (MEM, BLKmode, addr1);
}")
+
+(define_insn "*movstrqi_insn"
+ [(set (mem:BLK (match_operand:HI 0 "register_operand" "e"))
+ (mem:BLK (match_operand:HI 1 "register_operand" "e")))
+ (use (match_operand:QI 2 "register_operand" "r"))
+ (use (match_operand:QI 3 "const_int_operand" "i"))
+ (clobber (match_scratch:HI 4 "=0"))
+ (clobber (match_scratch:HI 5 "=1"))
+ (clobber (match_scratch:QI 6 "=2"))]
+ ""
+ "ld __tmp_reg__,%a1+
+ st %a0+,__tmp_reg__
+ dec %2
+ brne .-8"
+ [(set_attr "length" "4")
+ (set_attr "cc" "clobber")])
+
+(define_insn "*movstrhi"
+ [(set (mem:BLK (match_operand:HI 0 "register_operand" "e,e"))
+ (mem:BLK (match_operand:HI 1 "register_operand" "e,e")))
+ (use (match_operand:HI 2 "register_operand" "!w,d"))
+ (use (match_operand:HI 3 "const_int_operand" ""))
+ (clobber (match_scratch:HI 4 "=0,0"))
+ (clobber (match_scratch:HI 5 "=1,1"))
+ (clobber (match_scratch:HI 6 "=2,2"))]
+ ""
+ "*{
+ if (which_alternative==0)
+ return (AS2 (ld,__tmp_reg__,%a1+) CR_TAB
+ AS2 (st,%a0+,__tmp_reg__) CR_TAB
+ AS2 (sbiw,%A2,1) CR_TAB
+ AS1 (brne,.-8));
+ else
+ return (AS2 (ld,__tmp_reg__,%a1+) CR_TAB
+ AS2 (st,%a0+,__tmp_reg__) CR_TAB
+ AS2 (subi,%A2,1) CR_TAB
+ AS2 (sbci,%B2,0) CR_TAB
+ AS1 (brne,.-10));
+}"
+ [(set_attr "length" "4,5")
+ (set_attr "cc" "clobber,clobber")])
;; =0 =0 =0 =0 =0 =0 =0 =0 =0 =0 =0 =0 =0 =0 =0 =0 =0 =0 =0 =0 =0 =0 =0 =0
;; memset (%0, 0, %1)
|
