diff options
Diffstat (limited to 'rts/gmp/mpn/powerpc32/rshift.asm')
| -rw-r--r-- | rts/gmp/mpn/powerpc32/rshift.asm | 60 |
1 files changed, 60 insertions, 0 deletions
diff --git a/rts/gmp/mpn/powerpc32/rshift.asm b/rts/gmp/mpn/powerpc32/rshift.asm new file mode 100644 index 0000000000..a09ba04938 --- /dev/null +++ b/rts/gmp/mpn/powerpc32/rshift.asm @@ -0,0 +1,60 @@ +dnl PowerPC-32 mpn_rshift -- Shift a number right. + +dnl Copyright (C) 1995, 2000 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 by +dnl the Free Software Foundation; either version 2.1 of the License, or (at your +dnl 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; see the file COPYING.LIB. If not, write to +dnl the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, +dnl MA 02111-1307, USA. + + +dnl INPUT PARAMETERS +dnl res_ptr r3 +dnl s1_ptr r4 +dnl size r5 +dnl cnt r6 + +include(`../config.m4') + +ASM_START() +PROLOGUE(mpn_rshift) + mtctr r5 C copy size into CTR + addi r7,r3,-4 C move adjusted res_ptr to free return reg + subfic r8,r6,32 + lwz r11,0(r4) C load first s1 limb + slw r3,r11,r8 C compute function return value + bdz .Lend1 + +.Loop: lwzu r10,4(r4) + srw r9,r11,r6 + slw r12,r10,r8 + or r9,r9,r12 + stwu r9,4(r7) + bdz .Lend2 + lwzu r11,4(r4) + srw r9,r10,r6 + slw r12,r11,r8 + or r9,r9,r12 + stwu r9,4(r7) + bdnz .Loop + +.Lend1: srw r0,r11,r6 + stw r0,4(r7) + blr + +.Lend2: srw r0,r10,r6 + stw r0,4(r7) + blr +EPILOGUE(mpn_rshift) |