github.com/aergoio/aergo@v1.3.1/libtool/src/gmp-6.1.2/mpn/arm/aorsmul_1.asm (about)

     1  dnl  ARM mpn_addmul_1 and mpn_submul_1.
     2  
     3  dnl  Copyright 1998, 2000, 2001, 2003, 2012 Free Software Foundation, Inc.
     4  
     5  dnl  This file is part of the GNU MP Library.
     6  dnl
     7  dnl  The GNU MP Library is free software; you can redistribute it and/or modify
     8  dnl  it under the terms of either:
     9  dnl
    10  dnl    * the GNU Lesser General Public License as published by the Free
    11  dnl      Software Foundation; either version 3 of the License, or (at your
    12  dnl      option) any later version.
    13  dnl
    14  dnl  or
    15  dnl
    16  dnl    * the GNU General Public License as published by the Free Software
    17  dnl      Foundation; either version 2 of the License, or (at your option) any
    18  dnl      later version.
    19  dnl
    20  dnl  or both in parallel, as here.
    21  dnl
    22  dnl  The GNU MP Library is distributed in the hope that it will be useful, but
    23  dnl  WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
    24  dnl  or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
    25  dnl  for more details.
    26  dnl
    27  dnl  You should have received copies of the GNU General Public License and the
    28  dnl  GNU Lesser General Public License along with the GNU MP Library.  If not,
    29  dnl  see https://www.gnu.org/licenses/.
    30  
    31  include(`../config.m4')
    32  
    33  C	     cycles/limb
    34  C StrongARM:     ?
    35  C XScale	 ?
    36  C Cortex-A7	 ?
    37  C Cortex-A8	 ?
    38  C Cortex-A9	 5.25
    39  C Cortex-A15	 4
    40  
    41  define(`rp', `r0')
    42  define(`up', `r1')
    43  define(`n',  `r2')
    44  define(`vl', `r3')
    45  define(`rl', `r12')
    46  define(`ul', `r6')
    47  define(`r',  `lr')
    48  
    49  ifdef(`OPERATION_addmul_1', `
    50    define(`ADDSUB',	adds)
    51    define(`ADDSUBC',	adcs)
    52    define(`CLRRCY',	`mov	$1, #0
    53  			adds	r0, r0, #0')
    54    define(`RETVAL',	`adc	r0, r4, #0')
    55    define(`func',	mpn_addmul_1)')
    56  ifdef(`OPERATION_submul_1', `
    57    define(`ADDSUB',	subs)
    58    define(`ADDSUBC',	sbcs)
    59    define(`CLRRCY',	`subs	$1, r0, r0')
    60    define(`RETVAL',	`sbc	r0, r0, r0
    61  			sub	r0, $1, r0')
    62    define(`func',	mpn_submul_1)')
    63  
    64  MULFUNC_PROLOGUE(mpn_addmul_1 mpn_submul_1)
    65  
    66  ASM_START()
    67  PROLOGUE(func)
    68  	stmfd	sp!, { r4-r6, lr }
    69  	CLRRCY(	r4)
    70  	tst	n, #1
    71  	beq	L(skip1)
    72  	ldr	ul, [up], #4
    73  	ldr	rl, [rp, #0]
    74  	umull	r5, r4, ul, vl
    75  	ADDSUB	r, rl, r5
    76  	str	r, [rp], #4
    77  L(skip1):
    78  	tst	n, #2
    79  	beq	L(skip2)
    80  	ldr	ul, [up], #4
    81  	ldr	rl, [rp, #0]
    82  	mov	r5, #0
    83  	umlal	r4, r5, ul, vl
    84  	ldr	ul, [up], #4
    85  	ADDSUBC	r, rl, r4
    86  	ldr	rl, [rp, #4]
    87  	mov	r4, #0
    88  	umlal	r5, r4, ul, vl
    89  	str	r, [rp], #4
    90  	ADDSUBC	r, rl, r5
    91  	str	r, [rp], #4
    92  L(skip2):
    93  	bics	n, n, #3
    94  	beq	L(rtn)
    95  
    96  	ldr	ul, [up], #4
    97  	ldr	rl, [rp, #0]
    98  	mov	r5, #0
    99  	umlal	r4, r5, ul, vl
   100  	b	L(in)
   101  
   102  L(top):	ldr	ul, [up], #4
   103  	ADDSUBC	r, rl, r5
   104  	ldr	rl, [rp, #4]
   105  	mov	r5, #0
   106  	umlal	r4, r5, ul, vl
   107  	str	r, [rp], #4
   108  L(in):	ldr	ul, [up], #4
   109  	ADDSUBC	r, rl, r4
   110  	ldr	rl, [rp, #4]
   111  	mov	r4, #0
   112  	umlal	r5, r4, ul, vl
   113  	str	r, [rp], #4
   114  	ldr	ul, [up], #4
   115  	ADDSUBC	r, rl, r5
   116  	ldr	rl, [rp, #4]
   117  	mov	r5, #0
   118  	umlal	r4, r5, ul, vl
   119  	str	r, [rp], #4
   120  	ldr	ul, [up], #4
   121  	ADDSUBC	r, rl, r4
   122  	ldr	rl, [rp, #4]
   123  	mov	r4, #0
   124  	umlal	r5, r4, ul, vl
   125  	sub	n, n, #4
   126  	tst	n, n
   127  	str	r, [rp], #4
   128  	bne	L(top)
   129  
   130  	ADDSUBC	r, rl, r5
   131  	str	r, [rp]
   132  
   133  L(rtn):	RETVAL(	r4)
   134  	ldmfd	sp!, { r4-r6, pc }
   135  EPILOGUE()