| Alexey Brodkin | b628c01 | 2014-02-04 12:56:15 +0400 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2004, 2007-2010, 2011-2014 Synopsys, Inc. All rights reserved. |
| 3 | * |
| 4 | * SPDX-License-Identifier: GPL-2.0+ |
| 5 | */ |
| 6 | |
| 7 | #define SMALL 7 /* Must be at least 6 to deal with alignment/loop issues. */ |
| 8 | |
| 9 | .global memset |
| 10 | .align 4 |
| 11 | memset: |
| 12 | mov_s %r4, %r0 |
| 13 | or %r12, %r0, %r2 |
| 14 | bmsk.f %r12, %r12, 1 |
| 15 | extb_s %r1, %r1 |
| 16 | asl %r3, %r1, 8 |
| 17 | beq.d .Laligned |
| 18 | or_s %r1, %r1, %r3 |
| 19 | brls %r2, SMALL, .Ltiny |
| 20 | add %r3, %r2, %r0 |
| 21 | stb %r1, [%r3, -1] |
| 22 | bclr_s %r3, %r3, 0 |
| 23 | stw %r1, [%r3, -2] |
| 24 | bmsk.f %r12, %r0, 1 |
| 25 | add_s %r2, %r2, %r12 |
| 26 | sub.ne %r2, %r2, 4 |
| 27 | stb.ab %r1, [%r4, 1] |
| 28 | and %r4, %r4, -2 |
| 29 | stw.ab %r1, [%r4, 2] |
| 30 | and %r4, %r4, -4 |
| 31 | |
| 32 | .balign 4 |
| 33 | .Laligned: |
| 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 | |
| 50 | /* |
| 51 | * memzero: @r0 = mem, @r1 = size_t |
| 52 | * memset: @r0 = mem, @r1 = char, @r2 = size_t |
| 53 | */ |
| 54 | |
| 55 | .global memzero |
| 56 | .align 4 |
| 57 | memzero: |
| 58 | /* adjust bzero args to memset args */ |
| 59 | mov %r2, %r1 |
| 60 | mov %r1, 0 |
| 61 | /* tail call so need to tinker with blink */ |
| 62 | b memset |