| David Brazdil | 0f672f6 | 2019-12-10 10:32:29 +0000 | [diff] [blame^] | 1 | /* SPDX-License-Identifier: GPL-2.0-only */ |
| Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 2 | /* |
| 3 | * Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com) |
| Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 4 | */ |
| 5 | |
| 6 | #include <linux/linkage.h> |
| 7 | |
| 8 | #define SMALL 7 /* Must be at least 6 to deal with alignment/loop issues. */ |
| 9 | |
| 10 | ENTRY_CFI(memset) |
| 11 | mov_s r4,r0 |
| 12 | or r12,r0,r2 |
| 13 | bmsk.f r12,r12,1 |
| 14 | extb_s r1,r1 |
| 15 | asl r3,r1,8 |
| 16 | beq.d .Laligned |
| 17 | or_s r1,r1,r3 |
| 18 | brls r2,SMALL,.Ltiny |
| 19 | add r3,r2,r0 |
| 20 | stb r1,[r3,-1] |
| 21 | bclr_s r3,r3,0 |
| 22 | stw r1,[r3,-2] |
| 23 | bmsk.f r12,r0,1 |
| 24 | add_s r2,r2,r12 |
| 25 | sub.ne r2,r2,4 |
| 26 | stb.ab r1,[r4,1] |
| 27 | and r4,r4,-2 |
| 28 | stw.ab r1,[r4,2] |
| 29 | and r4,r4,-4 |
| 30 | .Laligned: ; This code address should be aligned for speed. |
| 31 | asl r3,r1,16 |
| 32 | lsr.f lp_count,r2,2 |
| 33 | or_s r1,r1,r3 |
| 34 | lpne .Loop_end |
| 35 | st.ab r1,[r4,4] |
| 36 | .Loop_end: |
| 37 | j_s [blink] |
| 38 | |
| 39 | .balign 4 |
| 40 | .Ltiny: |
| 41 | mov.f lp_count,r2 |
| 42 | lpne .Ltiny_end |
| 43 | stb.ab r1,[r4,1] |
| 44 | .Ltiny_end: |
| 45 | j_s [blink] |
| 46 | END_CFI(memset) |
| 47 | |
| 48 | ; memzero: @r0 = mem, @r1 = size_t |
| 49 | ; memset: @r0 = mem, @r1 = char, @r2 = size_t |
| 50 | |
| 51 | ENTRY_CFI(memzero) |
| 52 | ; adjust bzero args to memset args |
| 53 | mov r2, r1 |
| 54 | mov r1, 0 |
| 55 | b memset ;tail call so need to tinker with blink |
| 56 | END_CFI(memzero) |