1995-10-16 09:18:40 +08:00
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# Alpha __mpn_sub_n -- Subtract two limb vectors of the same length > 0 and
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# store difference in a third limb vector.
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2013-01-03 03:01:50 +08:00
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# Copyright (C) 1995-2013 Free Software Foundation, Inc.
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1995-10-16 09:18:40 +08:00
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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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2001-07-07 18:13:33 +08:00
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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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1995-10-16 09:18:40 +08:00
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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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2001-07-07 18:13:33 +08:00
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# or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
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1995-10-16 09:18:40 +08:00
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# License for more details.
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2001-07-07 18:13:33 +08:00
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# You should have received a copy of the GNU Lesser General Public License
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2012-03-10 07:56:38 +08:00
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# along with the GNU MP Library. If not, see <http://www.gnu.org/licenses/>.
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1995-10-16 09:18:40 +08:00
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# INPUT PARAMETERS
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# res_ptr $16
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# s1_ptr $17
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# s2_ptr $18
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# size $19
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.set noreorder
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.set noat
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.text
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.align 3
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.globl __mpn_sub_n
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.ent __mpn_sub_n
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__mpn_sub_n:
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.frame $30,0,$26,0
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ldq $3,0($17)
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ldq $4,0($18)
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subq $19,1,$19
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and $19,4-1,$2 # number of limbs in first loop
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bis $31,$31,$0
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beq $2,.L0 # if multiple of 4 limbs, skip first loop
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subq $19,$2,$19
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.Loop0: subq $2,1,$2
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ldq $5,8($17)
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addq $4,$0,$4
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ldq $6,8($18)
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cmpult $4,$0,$1
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subq $3,$4,$4
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cmpult $3,$4,$0
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stq $4,0($16)
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or $0,$1,$0
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addq $17,8,$17
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addq $18,8,$18
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bis $5,$5,$3
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bis $6,$6,$4
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addq $16,8,$16
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bne $2,.Loop0
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.L0: beq $19,.Lend
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.align 3
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.Loop: subq $19,4,$19
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ldq $5,8($17)
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addq $4,$0,$4
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ldq $6,8($18)
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cmpult $4,$0,$1
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subq $3,$4,$4
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cmpult $3,$4,$0
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stq $4,0($16)
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or $0,$1,$0
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ldq $3,16($17)
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addq $6,$0,$6
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ldq $4,16($18)
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cmpult $6,$0,$1
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subq $5,$6,$6
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cmpult $5,$6,$0
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stq $6,8($16)
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or $0,$1,$0
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ldq $5,24($17)
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addq $4,$0,$4
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ldq $6,24($18)
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cmpult $4,$0,$1
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subq $3,$4,$4
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cmpult $3,$4,$0
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stq $4,16($16)
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or $0,$1,$0
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ldq $3,32($17)
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addq $6,$0,$6
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ldq $4,32($18)
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cmpult $6,$0,$1
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subq $5,$6,$6
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cmpult $5,$6,$0
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stq $6,24($16)
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or $0,$1,$0
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addq $17,32,$17
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addq $18,32,$18
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addq $16,32,$16
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bne $19,.Loop
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.Lend: addq $4,$0,$4
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cmpult $4,$0,$1
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subq $3,$4,$4
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cmpult $3,$4,$0
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stq $4,0($16)
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or $0,$1,$0
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ret $31,($26),1
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.end __mpn_sub_n
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