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      1 dnl  ARM mpn_com.
      2 
      3 dnl  Copyright 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	 2.0
     39 C Cortex-A15	 1.75
     40 
     41 define(`rp', `r0')
     42 define(`up', `r1')
     43 define(`n',  `r2')
     44 
     45 ASM_START()
     46 PROLOGUE(mpn_com)
     47 	tst	n, #1
     48 	beq	L(skip1)
     49 	ldr	r3, [up], #4
     50 	mvn	r3, r3
     51 	str	r3, [rp], #4
     52 L(skip1):
     53 	tst	n, #2
     54 	beq	L(skip2)
     55 	ldmia	up!, { r3, r12 }		C load 2 limbs
     56 	mvn	r3, r3
     57 	mvn	r12, r12
     58 	stmia	rp!, { r3, r12 }		C store 2 limbs
     59 L(skip2):
     60 	bics	n, n, #3
     61 	beq	L(rtn)
     62 	stmfd	sp!, { r7, r8, r9 }		C save regs on stack
     63 
     64 L(top):	ldmia	up!, { r3, r8, r9, r12 }	C load 4 limbs
     65 	subs	n, n, #4
     66 	mvn	r3, r3
     67 	mvn	r8, r8
     68 	mvn	r9, r9
     69 	mvn	r12, r12
     70 	stmia	rp!, { r3, r8, r9, r12 }	C store 4 limbs
     71 	bne	L(top)
     72 
     73 	ldmfd	sp!, { r7, r8, r9 }		C restore regs from stack
     74 L(rtn):	return	lr
     75 EPILOGUE()
     76