| Masahiro Yamada | 24edb7e | 2015-02-10 21:37:01 +0900 | [diff] [blame] | 1 | /* Copyright (C) 1994, 1995, 1997, 1998, 1999, 2000, 2001, 2002, 2003, |
| 2 | 2004, 2005 |
| 3 | Free Software Foundation, Inc. |
| 4 | |
| 5 | * SPDX-License-Identifier: GPL-2.0+ |
| 6 | */ |
| 7 | |
| 8 | !! libgcc routines for the Renesas / SuperH SH CPUs. |
| 9 | !! Contributed by Steve Chamberlain. |
| 10 | !! sac@cygnus.com |
| 11 | |
| 12 | .balign 4 |
| 13 | .global __udivsi3 |
| 14 | .type __udivsi3, @function |
| 15 | div8: |
| 16 | div1 r5,r4 |
| 17 | div7: |
| 18 | div1 r5,r4; div1 r5,r4; div1 r5,r4 |
| 19 | div1 r5,r4; div1 r5,r4; div1 r5,r4; rts; div1 r5,r4 |
| 20 | |
| 21 | divx4: |
| 22 | div1 r5,r4; rotcl r0 |
| 23 | div1 r5,r4; rotcl r0 |
| 24 | div1 r5,r4; rotcl r0 |
| 25 | rts; div1 r5,r4 |
| 26 | |
| 27 | __udivsi3: |
| 28 | sts.l pr,@-r15 |
| 29 | extu.w r5,r0 |
| 30 | cmp/eq r5,r0 |
| 31 | bf/s large_divisor |
| 32 | div0u |
| 33 | swap.w r4,r0 |
| 34 | shlr16 r4 |
| 35 | bsr div8 |
| 36 | shll16 r5 |
| 37 | bsr div7 |
| 38 | div1 r5,r4 |
| 39 | xtrct r4,r0 |
| 40 | xtrct r0,r4 |
| 41 | bsr div8 |
| 42 | swap.w r4,r4 |
| 43 | bsr div7 |
| 44 | div1 r5,r4 |
| 45 | lds.l @r15+,pr |
| 46 | xtrct r4,r0 |
| 47 | swap.w r0,r0 |
| 48 | rotcl r0 |
| 49 | rts |
| 50 | shlr16 r5 |
| 51 | |
| 52 | large_divisor: |
| 53 | mov #0,r0 |
| 54 | xtrct r4,r0 |
| 55 | xtrct r0,r4 |
| 56 | bsr divx4 |
| 57 | rotcl r0 |
| 58 | bsr divx4 |
| 59 | rotcl r0 |
| 60 | bsr divx4 |
| 61 | rotcl r0 |
| 62 | bsr divx4 |
| 63 | rotcl r0 |
| 64 | lds.l @r15+,pr |
| 65 | rts |
| 66 | rotcl r0 |