1dnl S/390 mpn_mul_1 -- Multiply a limb vector with a limb and store the 2dnl result in a second limb vector. 3 4dnl Copyright 2001 Free Software Foundation, Inc. 5 6dnl This file is part of the GNU MP Library. 7dnl 8dnl The GNU MP Library is free software; you can redistribute it and/or modify 9dnl it under the terms of either: 10dnl 11dnl * the GNU Lesser General Public License as published by the Free 12dnl Software Foundation; either version 3 of the License, or (at your 13dnl option) any later version. 14dnl 15dnl or 16dnl 17dnl * the GNU General Public License as published by the Free Software 18dnl Foundation; either version 2 of the License, or (at your option) any 19dnl later version. 20dnl 21dnl or both in parallel, as here. 22dnl 23dnl The GNU MP Library is distributed in the hope that it will be useful, but 24dnl WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY 25dnl or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 26dnl for more details. 27dnl 28dnl You should have received copies of the GNU General Public License and the 29dnl GNU Lesser General Public License along with the GNU MP Library. If not, 30dnl see https://www.gnu.org/licenses/. 31 32include(`../config.m4') 33 34define(`rp',2) 35define(`up',3) 36define(`n',4) 37define(`vlimb',5) 38define(`cylimb',7) 39 40ASM_START() 41PROLOGUE(mpn_mul_1) 42 stm 6,7,24(15) 43 slr cylimb,cylimb # clear cylimb 44 ltr vlimb,vlimb 45 jnl .Loopp 46 47.Loopn: l 1,0(up) # load from u 48 lr 6,1 # 49 mr 0,vlimb # multiply signed 50 alr 0,6 # add vlimb to phi 51 sra 6,31 # make mask 52 nr 6,vlimb # 0 or vlimb 53 alr 0,6 # conditionally add vlimb to phi 54 alr 1,cylimb # add carry limb to plo 55 brc 8+4,+8 # branch if not carry 56 ahi 0,1 # increment phi 57 lr cylimb,0 # new cylimb 58 st 1,0(rp) # store 59 la up,4(,up) 60 la rp,4(,rp) 61 brct n,.Loopn 62 63 lr 2,cylimb 64 lm 6,7,24(15) 65 br 14 66 67.Loopp: l 1,0(up) # load from u 68 lr 6,1 # 69 mr 0,vlimb # multiply signed 70 sra 6,31 # make mask 71 nr 6,vlimb # 0 or vlimb 72 alr 0,6 # conditionally add vlimb to phi 73 alr 1,cylimb # add carry limb to plo 74 brc 8+4,+8 # branch if not carry 75 ahi 0,1 # increment phi 76 lr cylimb,0 # new cylimb 77 st 1,0(rp) # store 78 la up,4(,up) 79 la rp,4(,rp) 80 brct n,.Loopp 81 82 lr 2,cylimb 83 lm 6,7,24(15) 84 br 14 85EPILOGUE(mpn_mul_1) 86