diff options
Diffstat (limited to 'REORG.TODO/sysdeps/powerpc/powerpc32/rshift.S')
-rw-r--r-- | REORG.TODO/sysdeps/powerpc/powerpc32/rshift.S | 55 |
1 files changed, 55 insertions, 0 deletions
diff --git a/REORG.TODO/sysdeps/powerpc/powerpc32/rshift.S b/REORG.TODO/sysdeps/powerpc/powerpc32/rshift.S new file mode 100644 index 0000000000..58abdcad59 --- /dev/null +++ b/REORG.TODO/sysdeps/powerpc/powerpc32/rshift.S @@ -0,0 +1,55 @@ +/* Shift a limb right, low level routine. + Copyright (C) 1995-2017 Free Software Foundation, Inc. + This file is part of the GNU C Library. + + The GNU C 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 C 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 C Library; if not, see + <http://www.gnu.org/licenses/>. */ + +#include <sysdep.h> + +/* INPUT PARAMETERS + res_ptr r3 + s1_ptr r4 + size r5 + cnt r6 */ + +ENTRY (__mpn_rshift) + mtctr r5 # copy size into CTR + addi r7,r3,-4 # move adjusted res_ptr to free return reg + subfic r8,r6,32 + lwz r11,0(r4) # load first s1 limb + slw r3,r11,r8 # compute function return value + bdz L(1) + +L(0): lwzu r10,4(r4) + srw r9,r11,r6 + slw r12,r10,r8 + or r9,r9,r12 + stwu r9,4(r7) + bdz L(2) + lwzu r11,4(r4) + srw r9,r10,r6 + slw r12,r11,r8 + or r9,r9,r12 + stwu r9,4(r7) + bdnz L(0) + +L(1): srw r0,r11,r6 + stw r0,4(r7) + blr + +L(2): srw r0,r10,r6 + stw r0,4(r7) + blr +END (__mpn_rshift) |