1dnl HP-PA mpn_sub_n -- Subtract two limb vectors of the same length > 0 and 2dnl store difference in a third limb vector. 3 4dnl Copyright 1992, 1994, 2000, 2001, 2002 Free Software Foundation, Inc. 5 6dnl This file is part of the GNU MP Library. 7 8dnl The GNU MP Library is free software; you can redistribute it and/or modify 9dnl it under the terms of the GNU Lesser General Public License as published 10dnl by the Free Software Foundation; either version 3 of the License, or (at 11dnl your option) any later version. 12 13dnl The GNU MP Library is distributed in the hope that it will be useful, but 14dnl WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY 15dnl or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public 16dnl License for more details. 17 18dnl You should have received a copy of the GNU Lesser General Public License 19dnl along with the GNU MP Library. If not, see http://www.gnu.org/licenses/. 20 21include(`../config.m4') 22 23C INPUT PARAMETERS 24C res_ptr gr26 25C s1_ptr gr25 26C s2_ptr gr24 27C size gr23 28 29C One might want to unroll this as for other processors, but it turns out that 30C the data cache contention after a store makes such unrolling useless. We 31C can't come under 5 cycles/limb anyway. 32 33ASM_START() 34PROLOGUE(mpn_sub_n) 35 ldws,ma 4(0,%r25),%r20 36 ldws,ma 4(0,%r24),%r19 37 38 addib,= -1,%r23,L(end) C check for (SIZE == 1) 39 sub %r20,%r19,%r28 C subtract first limbs ignoring cy 40 41LDEF(loop) 42 ldws,ma 4(0,%r25),%r20 43 ldws,ma 4(0,%r24),%r19 44 stws,ma %r28,4(0,%r26) 45 addib,<> -1,%r23,L(loop) 46 subb %r20,%r19,%r28 47 48LDEF(end) 49 stws %r28,0(0,%r26) 50 addc %r0,%r0,%r28 51 bv 0(%r2) 52 subi 1,%r28,%r28 53EPILOGUE() 54