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Diffstat (limited to 'lib_blackfin/memmove.S')
| -rw-r--r-- | lib_blackfin/memmove.S | 96 |
1 files changed, 0 insertions, 96 deletions
diff --git a/lib_blackfin/memmove.S b/lib_blackfin/memmove.S deleted file mode 100644 index e385c4f..0000000 --- a/lib_blackfin/memmove.S +++ /dev/null @@ -1,96 +0,0 @@ -/* - * File: memmove.S - * - * Copyright 2004-2007 Analog Devices Inc. - * Enter bugs at http://blackfin.uclinux.org/ - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or - * (at your option) any later version. - * - * This program 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 General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, see the file COPYING, or write - * to the Free Software Foundation, Inc., - * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA - */ - -.align 2 - -/* - * C Library function MEMMOVE - * R0 = To Address (leave unchanged to form result) - * R1 = From Address - * R2 = count - * Data may overlap - */ - -.globl _memmove; -.type _memmove, STT_FUNC; -_memmove: - I1 = P3; - P0 = R0; /* P0 = To address */ - P3 = R1; /* P3 = From Address */ - P2 = R2 ; /* P2 = count */ - CC = P2 == 0; /* Check zero count*/ - IF CC JUMP .Lfinished; /* very unlikely */ - - CC = R1 < R0 (IU); /* From < To */ - IF !CC JUMP .Lno_overlap; - R3 = R1 + R2; - CC = R0 <= R3 (IU); /* (From+len) >= To */ - IF CC JUMP .Loverlap; -.Lno_overlap: - R3 = 11; - CC = R2 <= R3; - IF CC JUMP .Lbytes; - R3 = R1 | R0; /* OR addresses together */ - R3 <<= 30; /* check bottom two bits */ - CC = AZ; /* AZ set if zero.*/ - IF !CC JUMP .Lbytes ; /* Jump if addrs not aligned.*/ - - I0 = P3; - P1 = P2 >> 2; /* count = n/4 */ - P1 += -1; - R3 = 3; - R2 = R2 & R3; /* remainder */ - P2 = R2; /* set remainder */ - R1 = [I0++]; - - LSETUP (.Lquad_loop , .Lquad_loop) LC0=P1; -.Lquad_loop: MNOP || [P0++] = R1 || R1 = [I0++]; - [P0++] = R1; - - CC = P2 == 0; /* any remaining bytes? */ - P3 = I0; /* Ammend P3 to updated ptr. */ - IF !CC JUMP .Lbytes; - P3 = I1; - RTS; - -.Lbytes: LSETUP (.Lbyte2_s , .Lbyte2_e) LC0=P2; -.Lbyte2_s: R1 = B[P3++](Z); -.Lbyte2_e: B[P0++] = R1; - -.Lfinished: P3 = I1; - RTS; - -.Loverlap: - P2 += -1; - P0 = P0 + P2; - P3 = P3 + P2; - R1 = B[P3--] (Z); - CC = P2 == 0; - IF CC JUMP .Lno_loop; - LSETUP (.Lol_s, .Lol_e) LC0 = P2; -.Lol_s: B[P0--] = R1; -.Lol_e: R1 = B[P3--] (Z); -.Lno_loop: B[P0] = R1; - P3 = I1; - RTS; - -.size _memmove, .-_memmove |