github.com/aergoio/aergo@v1.3.1/libtool/src/gmp-6.1.2/mpn/powerpc32/mul_1.asm (about)

     1  dnl  PowerPC-32 mpn_mul_1 -- Multiply a limb vector with a limb and store the
     2  dnl  result in a second limb vector.
     3  
     4  dnl  Copyright 1995, 1997, 2000, 2002, 2003, 2005 Free Software Foundation,
     5  dnl  Inc.
     6  
     7  dnl  This file is part of the GNU MP Library.
     8  dnl
     9  dnl  The GNU MP Library is free software; you can redistribute it and/or modify
    10  dnl  it under the terms of either:
    11  dnl
    12  dnl    * the GNU Lesser General Public License as published by the Free
    13  dnl      Software Foundation; either version 3 of the License, or (at your
    14  dnl      option) any later version.
    15  dnl
    16  dnl  or
    17  dnl
    18  dnl    * the GNU General Public License as published by the Free Software
    19  dnl      Foundation; either version 2 of the License, or (at your option) any
    20  dnl      later version.
    21  dnl
    22  dnl  or both in parallel, as here.
    23  dnl
    24  dnl  The GNU MP Library is distributed in the hope that it will be useful, but
    25  dnl  WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
    26  dnl  or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
    27  dnl  for more details.
    28  dnl
    29  dnl  You should have received copies of the GNU General Public License and the
    30  dnl  GNU Lesser General Public License along with the GNU MP Library.  If not,
    31  dnl  see https://www.gnu.org/licenses/.
    32  
    33  include(`../config.m4')
    34  
    35  C                cycles/limb
    36  C 603e:            ?
    37  C 604e:            4.0
    38  C 75x (G3):        4.5-11
    39  C 7400,7410 (G4):  4.5-11
    40  C 744x,745x (G4+): 6.0
    41  C power4/ppc970:   6.0
    42  C power5:          5.63
    43  
    44  C INPUT PARAMETERS
    45  C rp	r3
    46  C up	r4
    47  C n	r5
    48  C vl	r6
    49  
    50  ASM_START()
    51  PROLOGUE(mpn_mul_1)
    52  	mtctr	r5
    53  	addi	r3,r3,-4	C adjust res_ptr, it's offset before it's used
    54  	li	r12,0		C clear upper product reg
    55  	addic	r0,r0,0		C clear cy
    56  C Start software pipeline
    57  	lwz	r8,0(r4)
    58  	bdz	L(end3)
    59  	lwzu	r9,4(r4)
    60  	mullw	r11,r8,r6
    61  	mulhwu	r0,r8,r6
    62  	bdz	L(end1)
    63  C Software pipelined main loop
    64  L(loop):
    65  	lwz	r8,4(r4)
    66  	mullw	r10,r9,r6
    67  	adde	r5,r11,r12
    68  	mulhwu	r12,r9,r6
    69  	stw	r5,4(r3)
    70  	bdz	L(end2)
    71  	lwzu	r9,8(r4)
    72  	mullw	r11,r8,r6
    73  	adde	r7,r10,r0
    74  	mulhwu	r0,r8,r6
    75  	stwu	r7,8(r3)
    76  	bdnz	L(loop)
    77  C Finish software pipeline
    78  L(end1):
    79  	mullw	r10,r9,r6
    80  	adde	r5,r11,r12
    81  	mulhwu	r12,r9,r6
    82  	stw	r5,4(r3)
    83  	adde	r7,r10,r0
    84  	stwu	r7,8(r3)
    85  	addze	r3,r12
    86  	blr
    87  L(end2):
    88  	mullw	r11,r8,r6
    89  	adde	r7,r10,r0
    90  	mulhwu	r0,r8,r6
    91  	stwu	r7,8(r3)
    92  	adde	r5,r11,r12
    93  	stw	r5,4(r3)
    94  	addze	r3,r0
    95  	blr
    96  L(end3):
    97  	mullw	r11,r8,r6
    98  	stw	r11,4(r3)
    99  	mulhwu	r3,r8,r6
   100  	blr
   101  EPILOGUE(mpn_mul_1)