| Vineet Gupta | 5210d1e | 2013-01-18 15:12:18 +0530 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com) |
| 3 | * |
| 4 | * This program is free software; you can redistribute it and/or modify |
| 5 | * it under the terms of the GNU General Public License version 2 as |
| 6 | * published by the Free Software Foundation. |
| 7 | */ |
| 8 | |
| 9 | #include <asm/linkage.h> |
| 10 | |
| 11 | #ifdef __LITTLE_ENDIAN__ |
| 12 | #define WORD2 r2 |
| 13 | #define SHIFT r3 |
| 14 | #else /* BIG ENDIAN */ |
| 15 | #define WORD2 r3 |
| 16 | #define SHIFT r2 |
| 17 | #endif |
| 18 | |
| 19 | ARC_ENTRY memcmp |
| 20 | or r12,r0,r1 |
| 21 | asl_s r12,r12,30 |
| 22 | sub r3,r2,1 |
| 23 | brls r2,r12,.Lbytewise |
| 24 | ld r4,[r0,0] |
| 25 | ld r5,[r1,0] |
| 26 | lsr.f lp_count,r3,3 |
| 27 | lpne .Loop_end |
| 28 | ld_s WORD2,[r0,4] |
| 29 | ld_s r12,[r1,4] |
| 30 | brne r4,r5,.Leven |
| 31 | ld.a r4,[r0,8] |
| 32 | ld.a r5,[r1,8] |
| 33 | brne WORD2,r12,.Lodd |
| 34 | .Loop_end: |
| 35 | asl_s SHIFT,SHIFT,3 |
| 36 | bhs_s .Last_cmp |
| 37 | brne r4,r5,.Leven |
| 38 | ld r4,[r0,4] |
| 39 | ld r5,[r1,4] |
| 40 | #ifdef __LITTLE_ENDIAN__ |
| 41 | nop_s |
| 42 | ; one more load latency cycle |
| 43 | .Last_cmp: |
| 44 | xor r0,r4,r5 |
| 45 | bset r0,r0,SHIFT |
| 46 | sub_s r1,r0,1 |
| 47 | bic_s r1,r1,r0 |
| 48 | norm r1,r1 |
| 49 | b.d .Leven_cmp |
| 50 | and r1,r1,24 |
| 51 | .Leven: |
| 52 | xor r0,r4,r5 |
| 53 | sub_s r1,r0,1 |
| 54 | bic_s r1,r1,r0 |
| 55 | norm r1,r1 |
| 56 | ; slow track insn |
| 57 | and r1,r1,24 |
| 58 | .Leven_cmp: |
| 59 | asl r2,r4,r1 |
| 60 | asl r12,r5,r1 |
| 61 | lsr_s r2,r2,1 |
| 62 | lsr_s r12,r12,1 |
| 63 | j_s.d [blink] |
| 64 | sub r0,r2,r12 |
| 65 | .balign 4 |
| 66 | .Lodd: |
| 67 | xor r0,WORD2,r12 |
| 68 | sub_s r1,r0,1 |
| 69 | bic_s r1,r1,r0 |
| 70 | norm r1,r1 |
| 71 | ; slow track insn |
| 72 | and r1,r1,24 |
| 73 | asl_s r2,r2,r1 |
| 74 | asl_s r12,r12,r1 |
| 75 | lsr_s r2,r2,1 |
| 76 | lsr_s r12,r12,1 |
| 77 | j_s.d [blink] |
| 78 | sub r0,r2,r12 |
| 79 | #else /* BIG ENDIAN */ |
| 80 | .Last_cmp: |
| 81 | neg_s SHIFT,SHIFT |
| 82 | lsr r4,r4,SHIFT |
| 83 | lsr r5,r5,SHIFT |
| 84 | ; slow track insn |
| 85 | .Leven: |
| 86 | sub.f r0,r4,r5 |
| 87 | mov.ne r0,1 |
| 88 | j_s.d [blink] |
| 89 | bset.cs r0,r0,31 |
| 90 | .Lodd: |
| 91 | cmp_s WORD2,r12 |
| 92 | |
| 93 | mov_s r0,1 |
| 94 | j_s.d [blink] |
| 95 | bset.cs r0,r0,31 |
| 96 | #endif /* ENDIAN */ |
| 97 | .balign 4 |
| 98 | .Lbytewise: |
| 99 | breq r2,0,.Lnil |
| 100 | ldb r4,[r0,0] |
| 101 | ldb r5,[r1,0] |
| 102 | lsr.f lp_count,r3 |
| 103 | lpne .Lbyte_end |
| 104 | ldb_s r3,[r0,1] |
| 105 | ldb r12,[r1,1] |
| 106 | brne r4,r5,.Lbyte_even |
| 107 | ldb.a r4,[r0,2] |
| 108 | ldb.a r5,[r1,2] |
| 109 | brne r3,r12,.Lbyte_odd |
| 110 | .Lbyte_end: |
| 111 | bcc .Lbyte_even |
| 112 | brne r4,r5,.Lbyte_even |
| 113 | ldb_s r3,[r0,1] |
| 114 | ldb_s r12,[r1,1] |
| 115 | .Lbyte_odd: |
| 116 | j_s.d [blink] |
| 117 | sub r0,r3,r12 |
| 118 | .Lbyte_even: |
| 119 | j_s.d [blink] |
| 120 | sub r0,r4,r5 |
| 121 | .Lnil: |
| 122 | j_s.d [blink] |
| 123 | mov r0,0 |
| 124 | ARC_EXIT memcmp |