diff options
Diffstat (limited to 'rts/gmp/mpn/powerpc64/rshift.asm')
| -rw-r--r-- | rts/gmp/mpn/powerpc64/rshift.asm | 60 |
1 files changed, 60 insertions, 0 deletions
diff --git a/rts/gmp/mpn/powerpc64/rshift.asm b/rts/gmp/mpn/powerpc64/rshift.asm new file mode 100644 index 0000000000..88272c7fa9 --- /dev/null +++ b/rts/gmp/mpn/powerpc64/rshift.asm @@ -0,0 +1,60 @@ +# PowerPC-64 mpn_rshift -- Shift a number right. + +# Copyright (C) 1999, 2000 Free Software Foundation, Inc. + +# This file is part of the GNU MP Library. + +# The GNU MP Library is free software; you can redistribute it and/or modify +# it under the terms of the GNU Lesser General Public License as published by +# the Free Software Foundation; either version 2.1 of the License, or (at your +# option) any later version. + +# The GNU MP Library is distributed in the hope that it will be useful, but +# WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY +# or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public +# License for more details. + +# You should have received a copy of the GNU Lesser General Public License +# along with the GNU MP Library; see the file COPYING.LIB. If not, write to +# the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, +# MA 02111-1307, USA. + + +# INPUT PARAMETERS +# res_ptr r3 +# s1_ptr r4 +# size r5 +# cnt r6 + +include(`../config.m4') + +ASM_START() +PROLOGUE(mpn_rshift) + mtctr r5 # copy size into CTR + addi r7,r3,-8 # move adjusted res_ptr to free return reg + subfic r8,r6,64 + ld r11,0(r4) # load first s1 limb + sld r3,r11,r8 # compute function return value + bdz .Lend1 + +.Loop: ldu r10,8(r4) + srd r9,r11,r6 + sld r12,r10,r8 + or r9,r9,r12 + stdu r9,8(r7) + bdz .Lend2 + ldu r11,8(r4) + srd r9,r10,r6 + sld r12,r11,r8 + or r9,r9,r12 + stdu r9,8(r7) + bdnz .Loop + +.Lend1: srd r0,r11,r6 + std r0,8(r7) + blr + +.Lend2: srd r0,r10,r6 + std r0,8(r7) + blr +EPILOGUE(mpn_rshift) |