| Paul Mundt | 1aad54a | 2008-11-18 17:33:48 +0900 | [diff] [blame^] | 1 | /* Copyright (C) 1994, 1995, 1997, 1998, 1999, 2000, 2001, 2002, 2003, |
| 2 | 2004, 2005, 2006 |
| 3 | Free Software Foundation, Inc. |
| 4 | |
| 5 | This file is free software; you can redistribute it and/or modify it |
| 6 | under the terms of the GNU General Public License as published by the |
| 7 | Free Software Foundation; either version 2, or (at your option) any |
| 8 | later version. |
| 9 | |
| 10 | In addition to the permissions in the GNU General Public License, the |
| 11 | Free Software Foundation gives you unlimited permission to link the |
| 12 | compiled version of this file into combinations with other programs, |
| 13 | and to distribute those combinations without any restriction coming |
| 14 | from the use of this file. (The General Public License restrictions |
| 15 | do apply in other respects; for example, they cover modification of |
| 16 | the file, and distribution when not linked into a combine |
| 17 | executable.) |
| 18 | |
| 19 | This file is distributed in the hope that it will be useful, but |
| 20 | WITHOUT ANY WARRANTY; without even the implied warranty of |
| 21 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 22 | General Public License for more details. |
| 23 | |
| 24 | You should have received a copy of the GNU General Public License |
| 25 | along with this program; see the file COPYING. If not, write to |
| 26 | the Free Software Foundation, 51 Franklin Street, Fifth Floor, |
| 27 | Boston, MA 02110-1301, USA. */ |
| 28 | |
| 29 | !! libgcc routines for the Renesas / SuperH SH CPUs. |
| 30 | !! Contributed by Steve Chamberlain. |
| 31 | !! sac@cygnus.com |
| 32 | |
| 33 | !! ashiftrt_r4_x, ___ashrsi3, ___ashlsi3, ___lshrsi3 routines |
| 34 | !! recoded in assembly by Toshiyasu Morita |
| 35 | !! tm@netcom.com |
| 36 | |
| 37 | /* SH2 optimizations for ___ashrsi3, ___ashlsi3, ___lshrsi3 and |
| 38 | ELF local label prefixes by J"orn Rennecke |
| 39 | amylaar@cygnus.com */ |
| 40 | |
| 41 | /* r0: rn r1: qn */ /* r0: n1 r4: n0 r5: d r6: d1 */ /* r2: __m */ |
| 42 | /* n1 < d, but n1 might be larger than d1. */ |
| 43 | .global __udiv_qrnnd_16 |
| 44 | .balign 8 |
| 45 | __udiv_qrnnd_16: |
| 46 | div0u |
| 47 | cmp/hi r6,r0 |
| 48 | bt .Lots |
| 49 | .rept 16 |
| 50 | div1 r6,r0 |
| 51 | .endr |
| 52 | extu.w r0,r1 |
| 53 | bt 0f |
| 54 | add r6,r0 |
| 55 | 0: rotcl r1 |
| 56 | mulu.w r1,r5 |
| 57 | xtrct r4,r0 |
| 58 | swap.w r0,r0 |
| 59 | sts macl,r2 |
| 60 | cmp/hs r2,r0 |
| 61 | sub r2,r0 |
| 62 | bt 0f |
| 63 | addc r5,r0 |
| 64 | add #-1,r1 |
| 65 | bt 0f |
| 66 | 1: add #-1,r1 |
| 67 | rts |
| 68 | add r5,r0 |
| 69 | .balign 8 |
| 70 | .Lots: |
| 71 | sub r5,r0 |
| 72 | swap.w r4,r1 |
| 73 | xtrct r0,r1 |
| 74 | clrt |
| 75 | mov r1,r0 |
| 76 | addc r5,r0 |
| 77 | mov #-1,r1 |
| 78 | bf/s 1b |
| 79 | shlr16 r1 |
| 80 | 0: rts |
| 81 | nop |