diff options
Diffstat (limited to 'rts/gmp/mpn/sparc32/lshift.asm')
| -rw-r--r-- | rts/gmp/mpn/sparc32/lshift.asm | 97 |
1 files changed, 97 insertions, 0 deletions
diff --git a/rts/gmp/mpn/sparc32/lshift.asm b/rts/gmp/mpn/sparc32/lshift.asm new file mode 100644 index 0000000000..529733ac2d --- /dev/null +++ b/rts/gmp/mpn/sparc32/lshift.asm @@ -0,0 +1,97 @@ +dnl SPARC mpn_lshift -- Shift a number left. +dnl + +dnl Copyright (C) 1995, 1996, 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 +dnl by the Free Software Foundation; either version 2.1 of the License, or (at +dnl your 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. + + +include(`../config.m4') + +C INPUT PARAMETERS +C res_ptr %o0 +C src_ptr %o1 +C size %o2 +C cnt %o3 + +ASM_START() +PROLOGUE(mpn_lshift) + sll %o2,2,%g1 + add %o1,%g1,%o1 C make %o1 point at end of src + ld [%o1-4],%g2 C load first limb + sub %g0,%o3,%o5 C negate shift count + add %o0,%g1,%o0 C make %o0 point at end of res + add %o2,-1,%o2 + andcc %o2,4-1,%g4 C number of limbs in first loop + srl %g2,%o5,%g1 C compute function result + be L(0) C if multiple of 4 limbs, skip first loop + st %g1,[%sp+80] + + sub %o2,%g4,%o2 C adjust count for main loop + +L(loop0): + ld [%o1-8],%g3 + add %o0,-4,%o0 + add %o1,-4,%o1 + addcc %g4,-1,%g4 + sll %g2,%o3,%o4 + srl %g3,%o5,%g1 + mov %g3,%g2 + or %o4,%g1,%o4 + bne L(loop0) + st %o4,[%o0+0] + +L(0): tst %o2 + be L(end) + nop + +L(loop): + ld [%o1-8],%g3 + add %o0,-16,%o0 + addcc %o2,-4,%o2 + sll %g2,%o3,%o4 + srl %g3,%o5,%g1 + + ld [%o1-12],%g2 + sll %g3,%o3,%g4 + or %o4,%g1,%o4 + st %o4,[%o0+12] + srl %g2,%o5,%g1 + + ld [%o1-16],%g3 + sll %g2,%o3,%o4 + or %g4,%g1,%g4 + st %g4,[%o0+8] + srl %g3,%o5,%g1 + + ld [%o1-20],%g2 + sll %g3,%o3,%g4 + or %o4,%g1,%o4 + st %o4,[%o0+4] + srl %g2,%o5,%g1 + + add %o1,-16,%o1 + or %g4,%g1,%g4 + bne L(loop) + st %g4,[%o0+0] + +L(end): sll %g2,%o3,%g2 + st %g2,[%o0-4] + retl + ld [%sp+80],%o0 +EPILOGUE(mpn_lshift) |