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Annotation of OpenXM_contrib/gmp/mpn/vax/sub_n.s, Revision 1.1.1.3

1.1.1.2   maekawa     1: # VAX __gmpn_sub_n -- Subtract two limb vectors of the same length > 0 and store
1.1       maekawa     2: # difference in a third limb vector.
                      3:
1.1.1.3 ! ohara       4: # Copyright 1999, 2000 Free Software Foundation, Inc.
1.1       maekawa     5:
                      6: # This file is part of the GNU MP Library.
                      7:
                      8: # The GNU MP Library is free software; you can redistribute it and/or modify
1.1.1.2   maekawa     9: # it under the terms of the GNU Lesser General Public License as published by
                     10: # the Free Software Foundation; either version 2.1 of the License, or (at your
1.1       maekawa    11: # option) any later version.
                     12:
                     13: # The GNU MP Library is distributed in the hope that it will be useful, but
                     14: # WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
1.1.1.2   maekawa    15: # or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public
1.1       maekawa    16: # License for more details.
                     17:
1.1.1.2   maekawa    18: # You should have received a copy of the GNU Lesser General Public License
1.1       maekawa    19: # along with the GNU MP Library; see the file COPYING.LIB.  If not, write to
                     20: # the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
                     21: # MA 02111-1307, USA.
                     22:
                     23:
                     24: # INPUT PARAMETERS
                     25: # res_ptr      (sp + 4)
                     26: # s1_ptr       (sp + 8)
                     27: # s2_ptr       (sp + 12)
                     28: # size         (sp + 16)
                     29:
                     30: .text
                     31:        .align 1
1.1.1.2   maekawa    32: .globl ___gmpn_sub_n
                     33: ___gmpn_sub_n:
1.1       maekawa    34:        .word   0x0
                     35:        movl    16(ap),r0
                     36:        movl    12(ap),r1
                     37:        movl    8(ap),r2
                     38:        movl    4(ap),r3
1.1.1.2   maekawa    39:        mnegl   r0,r5
                     40:        addl2   $3,r0
                     41:        ashl    $-2,r0,r0       # unroll loop count
                     42:        bicl2   $-4,r5          # mask out low 2 bits
                     43:        movaq   (r5)[r5],r5     # 9x
                     44:        jmp     Loop(r5)
1.1       maekawa    45:
1.1.1.2   maekawa    46: Loop:  movl    (r2)+,r4
                     47:        sbwc    (r1)+,r4
                     48:        movl    r4,(r3)+
                     49:        movl    (r2)+,r4
                     50:        sbwc    (r1)+,r4
                     51:        movl    r4,(r3)+
                     52:        movl    (r2)+,r4
                     53:        sbwc    (r1)+,r4
                     54:        movl    r4,(r3)+
1.1       maekawa    55:        movl    (r2)+,r4
                     56:        sbwc    (r1)+,r4
                     57:        movl    r4,(r3)+
1.1.1.2   maekawa    58:        sobgtr  r0,Loop
1.1       maekawa    59:
                     60:        adwc    r0,r0
                     61:        ret