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Diffstat (limited to 'arch/sh/lib/udivsi3.S')
| -rw-r--r-- | arch/sh/lib/udivsi3.S | 66 |
1 files changed, 66 insertions, 0 deletions
diff --git a/arch/sh/lib/udivsi3.S b/arch/sh/lib/udivsi3.S new file mode 100644 index 000000000..09ed1f9de --- /dev/null +++ b/arch/sh/lib/udivsi3.S @@ -0,0 +1,66 @@ +/* SPDX-License-Identifier: GPL-2.0+ WITH GCC-exception-2.0 + + Copyright (C) 1994, 1995, 1997, 1998, 1999, 2000, 2001, 2002, 2003, + 2004, 2005 + Free Software Foundation, Inc. +*/ + +!! libgcc routines for the Renesas / SuperH SH CPUs. +!! Contributed by Steve Chamberlain. +!! sac@cygnus.com + + .balign 4 + .global __udivsi3 + .type __udivsi3, @function +div8: + div1 r5,r4 +div7: + div1 r5,r4; div1 r5,r4; div1 r5,r4 + div1 r5,r4; div1 r5,r4; div1 r5,r4; rts; div1 r5,r4 + +divx4: + div1 r5,r4; rotcl r0 + div1 r5,r4; rotcl r0 + div1 r5,r4; rotcl r0 + rts; div1 r5,r4 + +__udivsi3: + sts.l pr,@-r15 + extu.w r5,r0 + cmp/eq r5,r0 + bf/s large_divisor + div0u + swap.w r4,r0 + shlr16 r4 + bsr div8 + shll16 r5 + bsr div7 + div1 r5,r4 + xtrct r4,r0 + xtrct r0,r4 + bsr div8 + swap.w r4,r4 + bsr div7 + div1 r5,r4 + lds.l @r15+,pr + xtrct r4,r0 + swap.w r0,r0 + rotcl r0 + rts + shlr16 r5 + +large_divisor: + mov #0,r0 + xtrct r4,r0 + xtrct r0,r4 + bsr divx4 + rotcl r0 + bsr divx4 + rotcl r0 + bsr divx4 + rotcl r0 + bsr divx4 + rotcl r0 + lds.l @r15+,pr + rts + rotcl r0 |