1dnl HP-PA 1.1 mpn_addmul_1 -- Multiply a limb vector with a limb and add the 2dnl result to a second limb vector. 3 4dnl Copyright 1992-1994, 2000-2002 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 34C INPUT PARAMETERS 35C res_ptr r26 36C s1_ptr r25 37C size r24 38C s2_limb r23 39 40C This runs at 11 cycles/limb on a PA7000. With the used instructions, it can 41C not become faster due to data cache contention after a store. On the PA7100 42C it runs at 10 cycles/limb. 43 44C There are some ideas described in mul_1.asm that applies to this code too. 45 46ASM_START() 47PROLOGUE(mpn_addmul_1) 48C .callinfo frame=64,no_calls 49 50 ldo 64(%r30),%r30 51 fldws,ma 4(%r25),%fr5 52 stw %r23,-16(%r30) C move s2_limb ... 53 addib,= -1,%r24,L(just_one_limb) 54 fldws -16(%r30),%fr4 C ... into fr4 55 add %r0,%r0,%r0 C clear carry 56 xmpyu %fr4,%fr5,%fr6 57 fldws,ma 4(%r25),%fr7 58 fstds %fr6,-16(%r30) 59 xmpyu %fr4,%fr7,%fr8 60 ldw -12(%r30),%r19 C least significant limb in product 61 ldw -16(%r30),%r28 62 63 fstds %fr8,-16(%r30) 64 addib,= -1,%r24,L(end) 65 ldw -12(%r30),%r1 66 67C Main loop 68LDEF(loop) 69 ldws 0(%r26),%r29 70 fldws,ma 4(%r25),%fr5 71 add %r29,%r19,%r19 72 stws,ma %r19,4(%r26) 73 addc %r28,%r1,%r19 74 xmpyu %fr4,%fr5,%fr6 75 ldw -16(%r30),%r28 76 fstds %fr6,-16(%r30) 77 addc %r0,%r28,%r28 78 addib,<> -1,%r24,L(loop) 79 ldw -12(%r30),%r1 80 81LDEF(end) 82 ldw 0(%r26),%r29 83 add %r29,%r19,%r19 84 stws,ma %r19,4(%r26) 85 addc %r28,%r1,%r19 86 ldw -16(%r30),%r28 87 ldws 0(%r26),%r29 88 addc %r0,%r28,%r28 89 add %r29,%r19,%r19 90 stws,ma %r19,4(%r26) 91 addc %r0,%r28,%r28 92 bv 0(%r2) 93 ldo -64(%r30),%r30 94 95LDEF(just_one_limb) 96 xmpyu %fr4,%fr5,%fr6 97 ldw 0(%r26),%r29 98 fstds %fr6,-16(%r30) 99 ldw -12(%r30),%r1 100 ldw -16(%r30),%r28 101 add %r29,%r1,%r19 102 stw %r19,0(%r26) 103 addc %r0,%r28,%r28 104 bv 0(%r2) 105 ldo -64(%r30),%r30 106EPILOGUE() 107