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Annotation of OpenXM_contrib/gmp/mpn/pa32/hppa1_1/pa7100/sub_n.asm, Revision 1.1.1.1

1.1       ohara       1: dnl  HP-PA mpn_sub_n -- Subtract two limb vectors of the same length > 0 and
                      2: dnl  store difference in a third limb vector.  Optimized for the PA7100, where
                      3: dnl  is runs at 4.25 cycles/limb.
                      4:
                      5: dnl  Copyright 1992, 1994, 2000, 2001, 2002 Free Software Foundation, Inc.
                      6:
                      7: dnl  This file is part of the GNU MP Library.
                      8:
                      9: dnl  The GNU MP Library is free software; you can redistribute it and/or modify
                     10: dnl  it under the terms of the GNU Lesser General Public License as published
                     11: dnl  by the Free Software Foundation; either version 2.1 of the License, or (at
                     12: dnl  your option) any later version.
                     13:
                     14: dnl  The GNU MP Library is distributed in the hope that it will be useful, but
                     15: dnl  WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
                     16: dnl  or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public
                     17: dnl  License for more details.
                     18:
                     19: dnl  You should have received a copy of the GNU Lesser General Public License
                     20: dnl  along with the GNU MP Library; see the file COPYING.LIB.  If not, write to
                     21: dnl  the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
                     22: dnl  MA 02111-1307, USA.
                     23:
                     24: include(`../config.m4')
                     25:
                     26: C INPUT PARAMETERS
                     27: C res_ptr      r26
                     28: C s1_ptr       r25
                     29: C s2_ptr       r24
                     30: C size         r23
                     31:
                     32: ASM_START()
                     33: PROLOGUE(mpn_sub_n)
                     34:        ldws,ma         4(0,%r25),%r20
                     35:        ldws,ma         4(0,%r24),%r19
                     36:
                     37:        addib,<=        -5,%r23,L(rest)
                     38:         sub            %r20,%r19,%r28  C subtract first limbs ignoring cy
                     39:
                     40:        .label  L(loop)
                     41:        ldws,ma         4(0,%r25),%r20
                     42:        ldws,ma         4(0,%r24),%r19
                     43:        stws,ma         %r28,4(0,%r26)
                     44:        subb            %r20,%r19,%r28
                     45:        ldws,ma         4(0,%r25),%r20
                     46:        ldws,ma         4(0,%r24),%r19
                     47:        stws,ma         %r28,4(0,%r26)
                     48:        subb            %r20,%r19,%r28
                     49:        ldws,ma         4(0,%r25),%r20
                     50:        ldws,ma         4(0,%r24),%r19
                     51:        stws,ma         %r28,4(0,%r26)
                     52:        subb            %r20,%r19,%r28
                     53:        ldws,ma         4(0,%r25),%r20
                     54:        ldws,ma         4(0,%r24),%r19
                     55:        stws,ma         %r28,4(0,%r26)
                     56:        addib,>         -4,%r23,L(loop)
                     57:        subb            %r20,%r19,%r28
                     58:
                     59:        .label  L(rest)
                     60:        addib,=         4,%r23,L(end)
                     61:        nop
                     62:
                     63:        .label  L(eloop)
                     64:        ldws,ma         4(0,%r25),%r20
                     65:        ldws,ma         4(0,%r24),%r19
                     66:        stws,ma         %r28,4(0,%r26)
                     67:        addib,>         -1,%r23,L(eloop)
                     68:        subb            %r20,%r19,%r28
                     69:
                     70:        .label  L(end)
                     71:        stws            %r28,0(0,%r26)
                     72:        addc            %r0,%r0,%r28
                     73:        bv              0(%r2)
                     74:         subi           1,%r28,%r28
                     75: EPILOGUE()