| /* SPDX-License-Identifier: GPL-2.0+ */ | |
| /* Copyright (C) 1994, 1995, 1997, 1998, 1999, 2000, 2001, 2002, 2003, | |
| 2004, 2005, 2006 | |
| Free Software Foundation, Inc. | |
| */ | |
| !! libgcc routines for the Renesas / SuperH SH CPUs. | |
| !! Contributed by Steve Chamberlain. | |
| !! sac@cygnus.com | |
| !! ashiftrt_r4_x, ___ashrsi3, ___ashlsi3, ___lshrsi3 routines | |
| !! recoded in assembly by Toshiyasu Morita | |
| !! tm@netcom.com | |
| /* SH2 optimizations for ___ashrsi3, ___ashlsi3, ___lshrsi3 and | |
| ELF local label prefixes by J"orn Rennecke | |
| amylaar@cygnus.com */ | |
| /* r0: rn r1: qn */ /* r0: n1 r4: n0 r5: d r6: d1 */ /* r2: __m */ | |
| /* n1 < d, but n1 might be larger than d1. */ | |
| .global __udiv_qrnnd_16 | |
| .balign 8 | |
| __udiv_qrnnd_16: | |
| div0u | |
| cmp/hi r6,r0 | |
| bt .Lots | |
| .rept 16 | |
| div1 r6,r0 | |
| .endr | |
| extu.w r0,r1 | |
| bt 0f | |
| add r6,r0 | |
| 0: rotcl r1 | |
| mulu.w r1,r5 | |
| xtrct r4,r0 | |
| swap.w r0,r0 | |
| sts macl,r2 | |
| cmp/hs r2,r0 | |
| sub r2,r0 | |
| bt 0f | |
| addc r5,r0 | |
| add #-1,r1 | |
| bt 0f | |
| 1: add #-1,r1 | |
| rts | |
| add r5,r0 | |
| .balign 8 | |
| .Lots: | |
| sub r5,r0 | |
| swap.w r4,r1 | |
| xtrct r0,r1 | |
| clrt | |
| mov r1,r0 | |
| addc r5,r0 | |
| mov #-1,r1 | |
| bf/s 1b | |
| shlr16 r1 | |
| 0: rts | |
| nop |