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Annotation of OpenXM_contrib/gmp/mpn/alpha/sqr_diagonal.asm, Revision 1.1.1.1

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()