| 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 | #define SMALL 7 /* Must be at least 6 to deal with alignment/loop issues. */ |
| 12 | |
| 13 | ARC_ENTRY memset |
| 14 | mov_s r4,r0 |
| 15 | or r12,r0,r2 |
| 16 | bmsk.f r12,r12,1 |
| 17 | extb_s r1,r1 |
| 18 | asl r3,r1,8 |
| 19 | beq.d .Laligned |
| 20 | or_s r1,r1,r3 |
| 21 | brls r2,SMALL,.Ltiny |
| 22 | add r3,r2,r0 |
| 23 | stb r1,[r3,-1] |
| 24 | bclr_s r3,r3,0 |
| 25 | stw r1,[r3,-2] |
| 26 | bmsk.f r12,r0,1 |
| 27 | add_s r2,r2,r12 |
| 28 | sub.ne r2,r2,4 |
| 29 | stb.ab r1,[r4,1] |
| 30 | and r4,r4,-2 |
| 31 | stw.ab r1,[r4,2] |
| 32 | and r4,r4,-4 |
| 33 | .Laligned: ; This code address should be aligned for speed. |
| 34 | asl r3,r1,16 |
| 35 | lsr.f lp_count,r2,2 |
| 36 | or_s r1,r1,r3 |
| 37 | lpne .Loop_end |
| 38 | st.ab r1,[r4,4] |
| 39 | .Loop_end: |
| 40 | j_s [blink] |
| 41 | |
| 42 | .balign 4 |
| 43 | .Ltiny: |
| 44 | mov.f lp_count,r2 |
| 45 | lpne .Ltiny_end |
| 46 | stb.ab r1,[r4,1] |
| 47 | .Ltiny_end: |
| 48 | j_s [blink] |
| 49 | ARC_EXIT memset |
| 50 | |
| 51 | ; memzero: @r0 = mem, @r1 = size_t |
| 52 | ; memset: @r0 = mem, @r1 = char, @r2 = size_t |
| 53 | |
| 54 | ARC_ENTRY memzero |
| 55 | ; adjust bzero args to memset args |
| 56 | mov r2, r1 |
| 57 | mov r1, 0 |
| 58 | b memset ;tail call so need to tinker with blink |
| 59 | ARC_EXIT memzero |