93 lines
2.2 KiB
ArmAsm
93 lines
2.2 KiB
ArmAsm
/* Copyright (C) 2009-2018 Free Software Foundation, Inc.
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This file is part of GCC.
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Contributed by Maciej W. Rozycki <macro@linux-mips.org>.
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This file is free software; you can redistribute it and/or modify it
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under the terms of the GNU General Public License as published by the
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Free Software Foundation; either version 3, or (at your option) any
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later version.
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This file is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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General Public License for more details.
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Under Section 7 of GPL version 3, you are granted additional
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permissions described in the GCC Runtime Library Exception, version
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3.1, as published by the Free Software Foundation.
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You should have received a copy of the GNU General Public License and
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a copy of the GCC Runtime Library Exception along with this program;
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see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
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<http://www.gnu.org/licenses/>. */
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#ifdef L_udivsi3
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.text
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.globl __udivsi3
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.type __udivsi3, @function
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__udivsi3:
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.word 0
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movl 8(%ap), %r1
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blss 0f /* Check bit #31 of divisor. */
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movl 4(%ap), %r2
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blss 1f /* Check bit #31 of dividend. */
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/* Both zero, do a standard division. */
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divl3 %r1, %r2, %r0
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ret
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/* MSB of divisor set, only 1 or 0 may result. */
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0:
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decl %r1
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clrl %r0
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cmpl %r1, 4(%ap)
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adwc $0, %r0
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ret
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/* MSB of dividend set, do an extended division. */
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1:
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clrl %r3
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ediv %r1, %r2, %r0, %r3
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ret
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.size __udivsi3, . - __udivsi3
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.previous
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#endif
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#ifdef L_umodsi3
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.text
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.globl __umodsi3
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.type __umodsi3, @function
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__umodsi3:
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.word 0
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movl 8(%ap), %r1
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blss 0f /* Check bit #31 of divisor. */
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movl 4(%ap), %r2
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blss 1f /* Check bit #31 of dividend. */
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/* Both zero, do a standard division. */
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divl3 %r1, %r2, %r0
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mull2 %r0, %r1
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subl3 %r1, %r2, %r0
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ret
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/* MSB of divisor set, subtract the divisor at most once. */
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0:
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movl 4(%ap), %r2
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clrl %r0
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cmpl %r2, %r1
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sbwc $0, %r0
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bicl2 %r0, %r1
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subl3 %r1, %r2, %r0
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ret
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/* MSB of dividend set, do an extended division. */
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1:
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clrl %r3
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ediv %r1, %r2, %r3, %r0
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ret
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.size __umodsi3, . - __umodsi3
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.previous
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#endif
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