Commit | Line | Data |
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14cf11af | 1 | /* |
14cf11af PM |
2 | * Copyright (C) 2002 Paul Mackerras, IBM Corp. |
3 | * | |
4 | * This program is free software; you can redistribute it and/or | |
5 | * modify it under the terms of the GNU General Public License | |
6 | * as published by the Free Software Foundation; either version | |
7 | * 2 of the License, or (at your option) any later version. | |
8 | */ | |
9 | #include <asm/processor.h> | |
10 | #include <asm/ppc_asm.h> | |
11 | ||
12 | .align 7 | |
13 | _GLOBAL(memcpy) | |
d0027bf0 | 14 | std r3,48(r1) /* save destination pointer for return value */ |
694caf02 | 15 | PPC_MTOCRF(0x01,r5) |
14cf11af PM |
16 | cmpldi cr1,r5,16 |
17 | neg r6,r3 # LS 3 bits = # bytes to 8-byte dest bdry | |
18 | andi. r6,r6,7 | |
19 | dcbt 0,r4 | |
20 | blt cr1,.Lshort_copy | |
25d6e2d7 MN |
21 | /* Below we want to nop out the bne if we're on a CPU that has the |
22 | CPU_FTR_UNALIGNED_LD_STD bit set and the CPU_FTR_CP_USE_DCBTZ bit | |
23 | cleared. | |
24 | At the time of writing the only CPU that has this combination of bits | |
25 | set is Power6. */ | |
26 | BEGIN_FTR_SECTION | |
27 | nop | |
28 | FTR_SECTION_ELSE | |
14cf11af | 29 | bne .Ldst_unaligned |
25d6e2d7 MN |
30 | ALT_FTR_SECTION_END(CPU_FTR_UNALIGNED_LD_STD | CPU_FTR_CP_USE_DCBTZ, \ |
31 | CPU_FTR_UNALIGNED_LD_STD) | |
14cf11af | 32 | .Ldst_aligned: |
14cf11af | 33 | addi r3,r3,-16 |
25d6e2d7 MN |
34 | BEGIN_FTR_SECTION |
35 | andi. r0,r4,7 | |
14cf11af | 36 | bne .Lsrc_unaligned |
25d6e2d7 | 37 | END_FTR_SECTION_IFCLR(CPU_FTR_UNALIGNED_LD_STD) |
14cf11af PM |
38 | srdi r7,r5,4 |
39 | ld r9,0(r4) | |
40 | addi r4,r4,-8 | |
41 | mtctr r7 | |
42 | andi. r5,r5,7 | |
43 | bf cr7*4+0,2f | |
44 | addi r3,r3,8 | |
45 | addi r4,r4,8 | |
46 | mr r8,r9 | |
47 | blt cr1,3f | |
48 | 1: ld r9,8(r4) | |
49 | std r8,8(r3) | |
50 | 2: ldu r8,16(r4) | |
51 | stdu r9,16(r3) | |
52 | bdnz 1b | |
53 | 3: std r8,8(r3) | |
d0027bf0 | 54 | beq 3f |
14cf11af | 55 | addi r3,r3,16 |
14cf11af PM |
56 | .Ldo_tail: |
57 | bf cr7*4+1,1f | |
e423b9ec MN |
58 | lwz r9,8(r4) |
59 | addi r4,r4,4 | |
14cf11af PM |
60 | stw r9,0(r3) |
61 | addi r3,r3,4 | |
62 | 1: bf cr7*4+2,2f | |
e423b9ec MN |
63 | lhz r9,8(r4) |
64 | addi r4,r4,2 | |
14cf11af PM |
65 | sth r9,0(r3) |
66 | addi r3,r3,2 | |
67 | 2: bf cr7*4+3,3f | |
e423b9ec | 68 | lbz r9,8(r4) |
14cf11af | 69 | stb r9,0(r3) |
d0027bf0 PM |
70 | 3: ld r3,48(r1) /* return dest pointer */ |
71 | blr | |
14cf11af PM |
72 | |
73 | .Lsrc_unaligned: | |
74 | srdi r6,r5,3 | |
75 | addi r5,r5,-16 | |
76 | subf r4,r0,r4 | |
77 | srdi r7,r5,4 | |
78 | sldi r10,r0,3 | |
79 | cmpdi cr6,r6,3 | |
80 | andi. r5,r5,7 | |
81 | mtctr r7 | |
82 | subfic r11,r10,64 | |
83 | add r5,r5,r0 | |
84 | ||
85 | bt cr7*4+0,0f | |
86 | ||
87 | ld r9,0(r4) # 3+2n loads, 2+2n stores | |
88 | ld r0,8(r4) | |
89 | sld r6,r9,r10 | |
90 | ldu r9,16(r4) | |
91 | srd r7,r0,r11 | |
92 | sld r8,r0,r10 | |
93 | or r7,r7,r6 | |
94 | blt cr6,4f | |
95 | ld r0,8(r4) | |
96 | # s1<< in r8, d0=(s0<<|s1>>) in r7, s3 in r0, s2 in r9, nix in r6 & r12 | |
97 | b 2f | |
98 | ||
99 | 0: ld r0,0(r4) # 4+2n loads, 3+2n stores | |
100 | ldu r9,8(r4) | |
101 | sld r8,r0,r10 | |
102 | addi r3,r3,-8 | |
103 | blt cr6,5f | |
104 | ld r0,8(r4) | |
105 | srd r12,r9,r11 | |
106 | sld r6,r9,r10 | |
107 | ldu r9,16(r4) | |
108 | or r12,r8,r12 | |
109 | srd r7,r0,r11 | |
110 | sld r8,r0,r10 | |
111 | addi r3,r3,16 | |
112 | beq cr6,3f | |
113 | ||
114 | # d0=(s0<<|s1>>) in r12, s1<< in r6, s2>> in r7, s2<< in r8, s3 in r9 | |
115 | 1: or r7,r7,r6 | |
116 | ld r0,8(r4) | |
117 | std r12,8(r3) | |
118 | 2: srd r12,r9,r11 | |
119 | sld r6,r9,r10 | |
120 | ldu r9,16(r4) | |
121 | or r12,r8,r12 | |
122 | stdu r7,16(r3) | |
123 | srd r7,r0,r11 | |
124 | sld r8,r0,r10 | |
125 | bdnz 1b | |
126 | ||
127 | 3: std r12,8(r3) | |
128 | or r7,r7,r6 | |
129 | 4: std r7,16(r3) | |
130 | 5: srd r12,r9,r11 | |
131 | or r12,r8,r12 | |
132 | std r12,24(r3) | |
d0027bf0 | 133 | beq 4f |
14cf11af PM |
134 | cmpwi cr1,r5,8 |
135 | addi r3,r3,32 | |
136 | sld r9,r9,r10 | |
e423b9ec | 137 | ble cr1,6f |
14cf11af PM |
138 | ld r0,8(r4) |
139 | srd r7,r0,r11 | |
140 | or r9,r7,r9 | |
e423b9ec MN |
141 | 6: |
142 | bf cr7*4+1,1f | |
143 | rotldi r9,r9,32 | |
144 | stw r9,0(r3) | |
145 | addi r3,r3,4 | |
146 | 1: bf cr7*4+2,2f | |
147 | rotldi r9,r9,16 | |
148 | sth r9,0(r3) | |
149 | addi r3,r3,2 | |
150 | 2: bf cr7*4+3,3f | |
151 | rotldi r9,r9,8 | |
152 | stb r9,0(r3) | |
153 | 3: ld r3,48(r1) /* return dest pointer */ | |
154 | blr | |
14cf11af PM |
155 | |
156 | .Ldst_unaligned: | |
694caf02 | 157 | PPC_MTOCRF(0x01,r6) # put #bytes to 8B bdry into cr7 |
14cf11af PM |
158 | subf r5,r6,r5 |
159 | li r7,0 | |
25d6e2d7 | 160 | cmpldi cr1,r5,16 |
14cf11af PM |
161 | bf cr7*4+3,1f |
162 | lbz r0,0(r4) | |
163 | stb r0,0(r3) | |
164 | addi r7,r7,1 | |
165 | 1: bf cr7*4+2,2f | |
166 | lhzx r0,r7,r4 | |
167 | sthx r0,r7,r3 | |
168 | addi r7,r7,2 | |
169 | 2: bf cr7*4+1,3f | |
170 | lwzx r0,r7,r4 | |
171 | stwx r0,r7,r3 | |
694caf02 | 172 | 3: PPC_MTOCRF(0x01,r5) |
14cf11af PM |
173 | add r4,r6,r4 |
174 | add r3,r6,r3 | |
175 | b .Ldst_aligned | |
176 | ||
177 | .Lshort_copy: | |
178 | bf cr7*4+0,1f | |
179 | lwz r0,0(r4) | |
180 | lwz r9,4(r4) | |
181 | addi r4,r4,8 | |
182 | stw r0,0(r3) | |
183 | stw r9,4(r3) | |
184 | addi r3,r3,8 | |
185 | 1: bf cr7*4+1,2f | |
186 | lwz r0,0(r4) | |
187 | addi r4,r4,4 | |
188 | stw r0,0(r3) | |
189 | addi r3,r3,4 | |
190 | 2: bf cr7*4+2,3f | |
191 | lhz r0,0(r4) | |
192 | addi r4,r4,2 | |
193 | sth r0,0(r3) | |
194 | addi r3,r3,2 | |
195 | 3: bf cr7*4+3,4f | |
196 | lbz r0,0(r4) | |
197 | stb r0,0(r3) | |
d0027bf0 PM |
198 | 4: ld r3,48(r1) /* return dest pointer */ |
199 | blr |