1 /* SPDX-License-Identifier: GPL-2.0+ */ 2 /* Copyright (C) 1994, 1995, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 3 2004, 2005, 2006 4 Free Software Foundation, Inc. 5 */ 6 7 !! libgcc routines for the Renesas / SuperH SH CPUs. 8 !! Contributed by Steve Chamberlain. 9 !! sac@cygnus.com 10 11 !! ashiftrt_r4_x, ___ashrsi3, ___ashlsi3, ___lshrsi3 routines 12 !! recoded in assembly by Toshiyasu Morita 13 !! tm@netcom.com 14 15 /* SH2 optimizations for ___ashrsi3, ___ashlsi3, ___lshrsi3 and 16 ELF local label prefixes by J"orn Rennecke 17 amylaar (at) cygnus.com */ 18 19 /* r0: rn r1: qn */ /* r0: n1 r4: n0 r5: d r6: d1 */ /* r2: __m */ 20 /* n1 < d, but n1 might be larger than d1. */ 21 .global __udiv_qrnnd_16 22 .balign 8 23 __udiv_qrnnd_16: 24 div0u 25 cmp/hi r6,r0 26 bt .Lots 27 .rept 16 28 div1 r6,r0 29 .endr 30 extu.w r0,r1 31 bt 0f 32 add r6,r0 33 0: rotcl r1 34 mulu.w r1,r5 35 xtrct r4,r0 36 swap.w r0,r0 37 sts macl,r2 38 cmp/hs r2,r0 39 sub r2,r0 40 bt 0f 41 addc r5,r0 42 add #-1,r1 43 bt 0f 44 1: add #-1,r1 45 rts 46 add r5,r0 47 .balign 8 48 .Lots: 49 sub r5,r0 50 swap.w r4,r1 51 xtrct r0,r1 52 clrt 53 mov r1,r0 54 addc r5,r0 55 mov #-1,r1 56 bf/s 1b 57 shlr16 r1 58 0: rts 59 nop 60
