diff options
Diffstat (limited to 'REORG.TODO/sysdeps/sparc/sparc64/rshift.S')
-rw-r--r-- | REORG.TODO/sysdeps/sparc/sparc64/rshift.S | 92 |
1 files changed, 92 insertions, 0 deletions
diff --git a/REORG.TODO/sysdeps/sparc/sparc64/rshift.S b/REORG.TODO/sysdeps/sparc/sparc64/rshift.S new file mode 100644 index 0000000000..f9319f2ec7 --- /dev/null +++ b/REORG.TODO/sysdeps/sparc/sparc64/rshift.S @@ -0,0 +1,92 @@ +/* SPARC v9 __mpn_rshift -- + + Copyright (C) 1996-2017 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, + see <http://www.gnu.org/licenses/>. */ + +#include <sysdep.h> + +/* INPUT PARAMETERS + res_ptr %o0 + src_ptr %o1 + size %o2 + cnt %o3 */ + + .register %g2, #scratch + .register %g3, #scratch + +ENTRY(__mpn_rshift) + ldx [%o1],%g2 ! load first limb + sub %g0,%o3,%o5 ! negate shift count + add %o2,-1,%o2 + andcc %o2,4-1,%g4 ! number of limbs in first loop + sllx %g2,%o5,%g1 ! compute function result + be,pn %xcc,.L0 ! if multiple of 4 limbs, skip first loop + mov %g1,%g5 + + sub %o2,%g4,%o2 ! adjust count for main loop + +.Loop0: ldx [%o1+8],%g3 + add %o0,8,%o0 + add %o1,8,%o1 + srlx %g2,%o3,%o4 + addcc %g4,-1,%g4 + sllx %g3,%o5,%g1 + mov %g3,%g2 + or %o4,%g1,%o4 + bne,pt %xcc,.Loop0 + stx %o4,[%o0-8] + +.L0: brz,pn %o2,.Lend + nop + +.Loop: ldx [%o1+8],%g3 + add %o0,32,%o0 + srlx %g2,%o3,%o4 + addcc %o2,-4,%o2 + sllx %g3,%o5,%g1 + + ldx [%o1+16],%g2 + srlx %g3,%o3,%g4 + or %o4,%g1,%o4 + stx %o4,[%o0-32] + sllx %g2,%o5,%g1 + + ldx [%o1+24],%g3 + srlx %g2,%o3,%o4 + or %g4,%g1,%g4 + stx %g4,[%o0-24] + sllx %g3,%o5,%g1 + + ldx [%o1+32],%g2 + srlx %g3,%o3,%g4 + or %o4,%g1,%o4 + stx %o4,[%o0-16] + sllx %g2,%o5,%g1 + + add %o1,32,%o1 + or %g4,%g1,%g4 + bne,pt %xcc,.Loop + stx %g4,[%o0-8] + +.Lend: srlx %g2,%o3,%g2 + stx %g2,[%o0-0] + + jmpl %o7+8,%g0 + mov %g5,%o0 + +END(__mpn_rshift) |