117 lines
2.8 KiB
ArmAsm
117 lines
2.8 KiB
ArmAsm
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; 29000 __gmpn_submul_1 -- Multiply a limb vector with a single limb and
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; subtract the product from a second limb vector.
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; Copyright 1992, 1994, 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 lr2
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; s1_ptr lr3
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; size lr4
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; s2_limb lr5
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.cputype 29050
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.sect .lit,lit
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.text
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.align 4
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.global ___gmpn_submul_1
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.word 0x60000
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___gmpn_submul_1:
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sub lr4,lr4,8
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jmpt lr4,Ltail
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const gr120,0 ; init cylimb reg
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srl gr117,lr4,3 ; divide by 8
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sub gr117,gr117,1 ; count for jmpfdec
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Loop: mtsrim cr,(8-1)
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loadm 0,0,gr96,lr3
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add lr3,lr3,32
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multiplu gr104,gr96,lr5
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multmu gr96,gr96,lr5
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multiplu gr105,gr97,lr5
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multmu gr97,gr97,lr5
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multiplu gr106,gr98,lr5
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multmu gr98,gr98,lr5
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multiplu gr107,gr99,lr5
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multmu gr99,gr99,lr5
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multiplu gr108,gr100,lr5
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multmu gr100,gr100,lr5
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multiplu gr109,gr101,lr5
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multmu gr101,gr101,lr5
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multiplu gr110,gr102,lr5
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multmu gr102,gr102,lr5
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multiplu gr111,gr103,lr5
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multmu gr103,gr103,lr5
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add gr104,gr104,gr120
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addc gr105,gr105,gr96
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addc gr106,gr106,gr97
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addc gr107,gr107,gr98
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addc gr108,gr108,gr99
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addc gr109,gr109,gr100
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addc gr110,gr110,gr101
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addc gr111,gr111,gr102
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addc gr120,gr103,0
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mtsrim cr,(8-1)
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loadm 0,0,gr96,lr2
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sub gr96,gr96,gr104
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subc gr97,gr97,gr105
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subc gr98,gr98,gr106
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subc gr99,gr99,gr107
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subc gr100,gr100,gr108
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subc gr101,gr101,gr109
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subc gr102,gr102,gr110
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subc gr103,gr103,gr111
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add gr104,gr103,gr111 ; invert carry from previus sub
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addc gr120,gr120,0
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mtsrim cr,(8-1)
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storem 0,0,gr96,lr2
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jmpfdec gr117,Loop
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add lr2,lr2,32
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Ltail: and lr4,lr4,(8-1)
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sub gr118,lr4,1 ; count for CR
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jmpt gr118,Lend
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sub lr4,lr4,2
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sub lr2,lr2,4 ; offset res_ptr by one limb
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Loop2: load 0,0,gr116,lr3
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add lr3,lr3,4
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multiplu gr117,gr116,lr5
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multmu gr118,gr116,lr5
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add lr2,lr2,4
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load 0,0,gr119,lr2
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add gr117,gr117,gr120
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addc gr118,gr118,0
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sub gr119,gr119,gr117
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add gr104,gr119,gr117 ; invert carry from previus sub
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store 0,0,gr119,lr2
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jmpfdec lr4,Loop2
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addc gr120,gr118,0
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Lend: jmpi lr0
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or gr96,gr120,0 ; copy
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