diff options
Diffstat (limited to 'sysdeps/sparc/sparc8/submul_1.S')
| -rw-r--r-- | sysdeps/sparc/sparc8/submul_1.S | 57 |
1 files changed, 57 insertions, 0 deletions
diff --git a/sysdeps/sparc/sparc8/submul_1.S b/sysdeps/sparc/sparc8/submul_1.S new file mode 100644 index 0000000000..5c4d688ee8 --- /dev/null +++ b/sysdeps/sparc/sparc8/submul_1.S @@ -0,0 +1,57 @@ +! SPARC v8 __mpn_submul_1 -- Multiply a limb vector with a limb and +! subtract the result from a second limb vector. + +! Copyright (C) 1992, 1993, 1994 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 Library General Public License as published by +! the Free Software Foundation; either version 2 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 Library General Public +! License for more details. + +! You should have received a copy of the GNU Library General Public License +! along with the GNU MP Library; see the file COPYING.LIB. If not, write to +! the Free Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. + + +! INPUT PARAMETERS +! res_ptr o0 +! s1_ptr o1 +! size o2 +! s2_limb o3 + +#include "sysdep.h" + +.text + .align 4 + .global C_SYMBOL_NAME(__mpn_submul_1) +C_SYMBOL_NAME(__mpn_submul_1): + sub %g0,%o2,%o2 ! negate ... + sll %o2,2,%o2 ! ... and scale size + sub %o1,%o2,%o1 ! o1 is offset s1_ptr + sub %o0,%o2,%g1 ! g1 is offset res_ptr + + mov 0,%o0 ! clear cy_limb + +Loop: ld [%o1+%o2],%o4 + ld [%g1+%o2],%g2 + umul %o4,%o3,%o5 + rd %y,%g3 + addcc %o5,%o0,%o5 + addx %g3,0,%o0 + subcc %g2,%o5,%g2 + addx %o0,0,%o0 + st %g2,[%g1+%o2] + + addcc %o2,4,%o2 + bne Loop + nop + + retl + nop |