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Annotation of OpenXM_contrib/gmp/mpn/alpha/sqr_diagonal.asm, Revision 1.1

1.1     ! ohara       1: dnl  Alpha mpn_sqr_diagonal.
        !             2:
        !             3: dnl  Copyright 2001 Free Software Foundation, Inc.
        !             4:
        !             5: dnl  This file is part of the GNU MP Library.
        !             6:
        !             7: dnl  The GNU MP Library is free software; you can redistribute it and/or modify
        !             8: dnl  it under the terms of the GNU Lesser General Public License as published
        !             9: dnl  by the Free Software Foundation; either version 2.1 of the License, or (at
        !            10: dnl  your option) any later version.
        !            11:
        !            12: dnl  The GNU MP Library is distributed in the hope that it will be useful, but
        !            13: dnl  WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
        !            14: dnl  or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public
        !            15: dnl  License for more details.
        !            16:
        !            17: dnl  You should have received a copy of the GNU Lesser General Public License
        !            18: dnl  along with the GNU MP Library; see the file COPYING.LIB.  If not, write to
        !            19: dnl  the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
        !            20: dnl  MA 02111-1307, USA.
        !            21:
        !            22: include(`../config.m4')
        !            23:
        !            24: dnl  INPUT PARAMETERS
        !            25: dnl  res_ptr   r16
        !            26: dnl  s1_ptr    r17
        !            27: dnl  size      r18
        !            28:
        !            29: dnl  This code runs at 42 cycles/limb on EV4, 18 cycles/limb on EV5, and 4
        !            30: dnl  cycles/limb on EV6.
        !            31:
        !            32: ASM_START()
        !            33: PROLOGUE(mpn_sqr_diagonal)
        !            34:        ldq     r2,0(r17)       C r2 = s1_limb
        !            35:        lda     r18,-2(r18)     C size -= 2
        !            36:        mulq    r2,r2,r3        C r3 = prod_low
        !            37:        umulh   r2,r2,r4        C r4 = prod_high
        !            38:        blt     r18,$Lend1      C jump if size was == 1
        !            39:        ldq     r2,8(r17)       C r2 = s1_limb
        !            40:        beq     r18,$Lend2      C jump if size was == 2
        !            41:
        !            42:        ALIGN(8)
        !            43: $Loop: stq     r3,0(r16)
        !            44:        mulq    r2,r2,r3        C r3 = prod_low
        !            45:        lda     r18,-1(r18)     C size--
        !            46:        stq     r4,8(r16)
        !            47:        umulh   r2,r2,r4        C r4 = cy_limb
        !            48:        ldq     r2,16(r17)      C r2 = s1_limb
        !            49:        lda     r17,8(r17)      C s1_ptr++
        !            50:        lda     r16,16(r16)     C res_ptr++
        !            51:        bne     r18,$Loop
        !            52:
        !            53: $Lend2:        stq     r3,0(r16)
        !            54:        mulq    r2,r2,r3        C r3 = prod_low
        !            55:        stq     r4,8(r16)
        !            56:        umulh   r2,r2,r4        C r4 = cy_limb
        !            57:        stq     r3,16(r16)
        !            58:        stq     r4,24(r16)
        !            59:        ret     r31,(r26),1
        !            60: $Lend1:        stq     r3,0(r16)
        !            61:        stq     r4,8(r16)
        !            62:        ret     r31,(r26),1
        !            63: EPILOGUE(mpn_sqr_diagonal)
        !            64: ASM_END()