Annotation of OpenXM/src/kan96xx/gmp-2.0.2/mpn/sparc32/submul_1.S, Revision 1.1
1.1 ! maekawa 1: ! SPARC __mpn_submul_1 -- Multiply a limb vector with a limb and subtract
! 2: ! the result from a second limb vector.
! 3:
! 4: ! Copyright (C) 1992, 1993, 1994 Free Software Foundation, Inc.
! 5:
! 6: ! This file is part of the GNU MP Library.
! 7:
! 8: ! The GNU MP Library is free software; you can redistribute it and/or modify
! 9: ! it under the terms of the GNU Library General Public License as published by
! 10: ! the Free Software Foundation; either version 2 of the License, or (at your
! 11: ! option) any later version.
! 12:
! 13: ! The GNU MP Library is distributed in the hope that it will be useful, but
! 14: ! WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
! 15: ! or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Library General Public
! 16: ! License for more details.
! 17:
! 18: ! You should have received a copy of the GNU Library General Public License
! 19: ! along with the GNU MP Library; see the file COPYING.LIB. If not, write to
! 20: ! the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
! 21: ! MA 02111-1307, USA.
! 22:
! 23:
! 24: ! INPUT PARAMETERS
! 25: ! res_ptr o0
! 26: ! s1_ptr o1
! 27: ! size o2
! 28: ! s2_limb o3
! 29:
! 30: #include "sysdep.h"
! 31:
! 32: .text
! 33: .align 4
! 34: .global C_SYMBOL_NAME(__mpn_submul_1)
! 35: C_SYMBOL_NAME(__mpn_submul_1):
! 36: ! Make S1_PTR and RES_PTR point at the end of their blocks
! 37: ! and put (- 4 x SIZE) in index/loop counter.
! 38: sll %o2,2,%o2
! 39: add %o0,%o2,%o4 ! RES_PTR in o4 since o0 is retval
! 40: add %o1,%o2,%o1
! 41: sub %g0,%o2,%o2
! 42:
! 43: cmp %o3,0xfff
! 44: bgu Large
! 45: nop
! 46:
! 47: ld [%o1+%o2],%o5
! 48: mov 0,%o0
! 49: b L0
! 50: add %o4,-4,%o4
! 51: Loop0:
! 52: subcc %o5,%g1,%g1
! 53: ld [%o1+%o2],%o5
! 54: addx %o0,%g0,%o0
! 55: st %g1,[%o4+%o2]
! 56: L0: wr %g0,%o3,%y
! 57: sra %o5,31,%g2
! 58: and %o3,%g2,%g2
! 59: andcc %g1,0,%g1
! 60: mulscc %g1,%o5,%g1
! 61: mulscc %g1,%o5,%g1
! 62: mulscc %g1,%o5,%g1
! 63: mulscc %g1,%o5,%g1
! 64: mulscc %g1,%o5,%g1
! 65: mulscc %g1,%o5,%g1
! 66: mulscc %g1,%o5,%g1
! 67: mulscc %g1,%o5,%g1
! 68: mulscc %g1,%o5,%g1
! 69: mulscc %g1,%o5,%g1
! 70: mulscc %g1,%o5,%g1
! 71: mulscc %g1,%o5,%g1
! 72: mulscc %g1,0,%g1
! 73: sra %g1,20,%g4
! 74: sll %g1,12,%g1
! 75: rd %y,%g3
! 76: srl %g3,20,%g3
! 77: or %g1,%g3,%g1
! 78:
! 79: addcc %g1,%o0,%g1
! 80: addx %g2,%g4,%o0 ! add sign-compensation and cy to hi limb
! 81: addcc %o2,4,%o2 ! loop counter
! 82: bne Loop0
! 83: ld [%o4+%o2],%o5
! 84:
! 85: subcc %o5,%g1,%g1
! 86: addx %o0,%g0,%o0
! 87: retl
! 88: st %g1,[%o4+%o2]
! 89:
! 90:
! 91: Large: ld [%o1+%o2],%o5
! 92: mov 0,%o0
! 93: sra %o3,31,%g4 ! g4 = mask of ones iff S2_LIMB < 0
! 94: b L1
! 95: add %o4,-4,%o4
! 96: Loop:
! 97: subcc %o5,%g3,%g3
! 98: ld [%o1+%o2],%o5
! 99: addx %o0,%g0,%o0
! 100: st %g3,[%o4+%o2]
! 101: L1: wr %g0,%o5,%y
! 102: and %o5,%g4,%g2
! 103: andcc %g0,%g0,%g1
! 104: mulscc %g1,%o3,%g1
! 105: mulscc %g1,%o3,%g1
! 106: mulscc %g1,%o3,%g1
! 107: mulscc %g1,%o3,%g1
! 108: mulscc %g1,%o3,%g1
! 109: mulscc %g1,%o3,%g1
! 110: mulscc %g1,%o3,%g1
! 111: mulscc %g1,%o3,%g1
! 112: mulscc %g1,%o3,%g1
! 113: mulscc %g1,%o3,%g1
! 114: mulscc %g1,%o3,%g1
! 115: mulscc %g1,%o3,%g1
! 116: mulscc %g1,%o3,%g1
! 117: mulscc %g1,%o3,%g1
! 118: mulscc %g1,%o3,%g1
! 119: mulscc %g1,%o3,%g1
! 120: mulscc %g1,%o3,%g1
! 121: mulscc %g1,%o3,%g1
! 122: mulscc %g1,%o3,%g1
! 123: mulscc %g1,%o3,%g1
! 124: mulscc %g1,%o3,%g1
! 125: mulscc %g1,%o3,%g1
! 126: mulscc %g1,%o3,%g1
! 127: mulscc %g1,%o3,%g1
! 128: mulscc %g1,%o3,%g1
! 129: mulscc %g1,%o3,%g1
! 130: mulscc %g1,%o3,%g1
! 131: mulscc %g1,%o3,%g1
! 132: mulscc %g1,%o3,%g1
! 133: mulscc %g1,%o3,%g1
! 134: mulscc %g1,%o3,%g1
! 135: mulscc %g1,%o3,%g1
! 136: mulscc %g1,%g0,%g1
! 137: rd %y,%g3
! 138: addcc %g3,%o0,%g3
! 139: addx %g2,%g1,%o0
! 140: addcc %o2,4,%o2
! 141: bne Loop
! 142: ld [%o4+%o2],%o5
! 143:
! 144: subcc %o5,%g3,%g3
! 145: addx %o0,%g0,%o0
! 146: retl
! 147: st %g3,[%o4+%o2]
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