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mul_1.asm
Package: gmp-5.0.1.tar.gz [view]
Upload User: qaz666999
Upload Date: 2022-08-06
Package Size: 2570k
Code Size: 2k
Category:
Algorithm
Development Platform:
Unix_Linux
- dnl S/390 mpn_mul_1 -- Multiply a limb vector with a limb and store the
- dnl result in a second limb vector.
- dnl Copyright 2001 Free Software Foundation, Inc.
- dnl This file is part of the GNU MP Library.
- dnl The GNU MP Library is free software; you can redistribute it and/or modify
- dnl it under the terms of the GNU Lesser General Public License as published
- dnl by the Free Software Foundation; either version 3 of the License, or (at
- dnl your option) any later version.
- dnl The GNU MP Library is distributed in the hope that it will be useful, but
- dnl WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
- dnl or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
- dnl License for more details.
- dnl You should have received a copy of the GNU Lesser General Public License
- dnl along with the GNU MP Library. If not, see http://www.gnu.org/licenses/.
- include(`../config.m4')
- define(`rp',2)
- define(`up',3)
- define(`n',4)
- define(`vlimb',5)
- define(`cylimb',7)
- ASM_START()
- PROLOGUE(mpn_mul_1)
- stm 6,7,24(15)
- slr cylimb,cylimb # clear cylimb
- ltr vlimb,vlimb
- jnl .Loopp
- .Loopn: l 1,0(up) # load from u
- lr 6,1 #
- mr 0,vlimb # multiply signed
- alr 0,6 # add vlimb to phi
- sra 6,31 # make mask
- nr 6,vlimb # 0 or vlimb
- alr 0,6 # conditionally add vlimb to phi
- alr 1,cylimb # add carry limb to plo
- brc 8+4,+8 # branch if not carry
- ahi 0,1 # increment phi
- lr cylimb,0 # new cylimb
- st 1,0(rp) # store
- la up,4(,up)
- la rp,4(,rp)
- brct n,.Loopn
- lr 2,cylimb
- lm 6,7,24(15)
- br 14
- .Loopp: l 1,0(up) # load from u
- lr 6,1 #
- mr 0,vlimb # multiply signed
- sra 6,31 # make mask
- nr 6,vlimb # 0 or vlimb
- alr 0,6 # conditionally add vlimb to phi
- alr 1,cylimb # add carry limb to plo
- brc 8+4,+8 # branch if not carry
- ahi 0,1 # increment phi
- lr cylimb,0 # new cylimb
- st 1,0(rp) # store
- la up,4(,up)
- la rp,4(,rp)
- brct n,.Loopp
- lr 2,cylimb
- lm 6,7,24(15)
- br 14
- EPILOGUE(mpn_mul_1)