X-Git-Url: https://notaz.gp2x.de/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=platform%2Fgp2x%2FuClibc%2Fmemset.s;fp=platform%2Fgp2x%2FuClibc%2Fmemset.s;h=0923014cd8aab4672b449e0f53a65e96a5ab8b22;hb=cc68a136aa179a5f32fe40208371eb9c2b0aadae;hp=0000000000000000000000000000000000000000;hpb=2cadbd5e56966f8b7a4e9790aba2f719cfcc38e8;p=picodrive.git diff --git a/platform/gp2x/uClibc/memset.s b/platform/gp2x/uClibc/memset.s new file mode 100644 index 0000000..0923014 --- /dev/null +++ b/platform/gp2x/uClibc/memset.s @@ -0,0 +1,72 @@ +/* Copyright (C) 1998 Free Software Foundation, Inc. + This file is part of the GNU C Library. + Contributed by Philip Blundell + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library; if not, write to the Free + Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA + 02111-1307 USA. */ + +@ #include + + .text + .global memset + .type memset,%function + .align 4 + +memset: + mov a4, a1 + cmp a3, $8 @ at least 8 bytes to do? + blt 2f + orr a2, a2, a2, lsl $8 + orr a2, a2, a2, lsl $16 +1: + tst a4, $3 @ aligned yet? + strneb a2, [a4], $1 + subne a3, a3, $1 + bne 1b + mov ip, a2 +1: + cmp a3, $8 @ 8 bytes still to do? + blt 2f + stmia a4!, {a2, ip} + sub a3, a3, $8 + cmp a3, $8 @ 8 bytes still to do? + blt 2f + stmia a4!, {a2, ip} + sub a3, a3, $8 + cmp a3, $8 @ 8 bytes still to do? + blt 2f + stmia a4!, {a2, ip} + sub a3, a3, $8 + cmp a3, $8 @ 8 bytes still to do? + stmgeia a4!, {a2, ip} + subge a3, a3, $8 + bge 1b +2: + movs a3, a3 @ anything left? + moveq pc, lr @ nope + rsb a3, a3, $7 + add pc, pc, a3, lsl $2 + mov r0, r0 + strb a2, [a4], $1 + strb a2, [a4], $1 + strb a2, [a4], $1 + strb a2, [a4], $1 + strb a2, [a4], $1 + strb a2, [a4], $1 + strb a2, [a4], $1 + mov pc, lr + +.size memset,.-memset; +