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dnl SH mpn_sub_n -- Subtract two limb vectors of the same length > 0 and store
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dnl difference in a third limb vector.
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dnl Copyright 1995, 1997, 2000, 2011 Free Software Foundation, Inc.
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dnl This file is part of the GNU MP Library.
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dnl
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dnl The GNU MP Library is free software; you can redistribute it and/or modify
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dnl it under the terms of either:
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dnl
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dnl * the GNU Lesser General Public License as published by the Free
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dnl Software Foundation; either version 3 of the License, or (at your
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dnl option) any later version.
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dnl
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dnl or
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dnl
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dnl * the GNU General Public License as published by the Free Software
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dnl Foundation; either version 2 of the License, or (at your option) any
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dnl later version.
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dnl
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dnl or both in parallel, as here.
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dnl
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dnl The GNU MP Library is distributed in the hope that it will be useful, but
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dnl WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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dnl or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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dnl for more details.
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dnl
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dnl You should have received copies of the GNU General Public License and the
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dnl GNU Lesser General Public License along with the GNU MP Library. If not,
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dnl see https://www.gnu.org/licenses/.
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include(`../config.m4')
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C INPUT PARAMETERS
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C rp r4
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C up r5
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C vp r6
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C n r7
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changecom(blah) C disable # to make all C comments below work
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ASM_START()
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PROLOGUE(mpn_sub_n)
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mov #0,r3 C clear cy save reg
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L(top): mov.l @r5+,r1
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mov.l @r6+,r2
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shlr r3 C restore cy
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subc r2,r1
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movt r3 C save cy
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mov.l r1,@r4
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dt r7
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bf.s L(top)
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add #4,r4
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rts
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mov r3,r0 C return carry-out from most significant limb
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EPILOGUE()
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