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Annotation of OpenXM_contrib/gmp/mpn/z8000/mul_1.s, Revision 1.1.1.3

1.1.1.2   maekawa     1: ! Z8000 __gmpn_mul_1 -- Multiply a limb vector with a limb and store
1.1       maekawa     2: ! the result in a second limb vector.
                      3:
1.1.1.3 ! ohara       4: ! Copyright 1993, 1994, 1995, 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      r7
                     26: ! s1_ptr       r6
                     27: ! size         r5
                     28: ! s2_limb      r4
                     29:
                     30:        unseg
                     31:        .text
                     32:        even
1.1.1.2   maekawa    33:        global ___gmpn_mul_1
                     34: ___gmpn_mul_1:
1.1       maekawa    35:        sub     r2,r2           ! zero carry limb
                     36:        and     r4,r4
                     37:        jr      mi,Lneg
                     38:
                     39: Lpos:  pop     r1,@r6
                     40:        ld      r9,r1
                     41:        mult    rr8,r4
                     42:        and     r1,r1           ! shift msb of loaded limb into cy
                     43:        jr      mi,Lp           ! branch if loaded limb's msb is set
                     44:        add     r8,r4           ! hi_limb += sign_comp2
                     45: Lp:    add     r9,r2           ! lo_limb += cy_limb
                     46:        xor     r2,r2
                     47:        adc     r2,r8
                     48:        ld      @r7,r9
                     49:        inc     r7,#2
                     50:        dec     r5
                     51:        jr      ne,Lpos
                     52:        ret t
                     53:
                     54: Lneg:  pop     r1,@r6
                     55:        ld      r9,r1
                     56:        mult    rr8,r4
                     57:        add     r8,r1           ! hi_limb += sign_comp1
                     58:        and     r1,r1
                     59:        jr      mi,Ln
                     60:        add     r8,r4           ! hi_limb += sign_comp2
                     61: Ln:    add     r9,r2           ! lo_limb += cy_limb
                     62:        xor     r2,r2
                     63:        adc     r2,r8
                     64:        ld      @r7,r9
                     65:        inc     r7,#2
                     66:        dec     r5
                     67:        jr      ne,Lneg
                     68:        ret t