48 lines
1.3 KiB
ArmAsm
48 lines
1.3 KiB
ArmAsm
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! SH __gmpn_sub_n -- Subtract two limb vectors of the same length > 0 and store
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! difference in a third limb vector.
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! Copyright 1995, 1997, 2000 Free Software Foundation, Inc.
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! This file is part of the GNU MP Library.
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! The GNU MP Library is free software; you can redistribute it and/or modify
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! it under the terms of the GNU Lesser General Public License as published by
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! the Free Software Foundation; either version 2.1 of the License, or (at your
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! option) any later version.
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! The GNU MP Library is distributed in the hope that it will be useful, but
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! WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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! or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
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! License for more details.
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! You should have received a copy of the GNU Lesser General Public License
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! along with the GNU MP Library; see the file COPYING.LIB. If not, write to
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! the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
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! MA 02110-1301, USA.
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! INPUT PARAMETERS
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! res_ptr r4
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! s1_ptr r5
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! s2_ptr r6
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! size r7
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.text
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.align 2
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.global ___gmpn_sub_n
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___gmpn_sub_n:
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mov #0,r3 ! clear cy save reg
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Loop: mov.l @r5+,r1
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mov.l @r6+,r2
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shlr r3 ! restore cy
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subc r2,r1
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movt r3 ! save cy
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mov.l r1,@r4
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dt r7
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bf.s Loop
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add #4,r4
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rts
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mov r3,r0 ! return carry-out from most sign. limb
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