Annotation of OpenXM_contrib/gmp/mpn/sparc32/submul_1.asm, Revision 1.1
1.1 ! maekawa 1: dnl SPARC mpn_submul_1 -- Multiply a limb vector with a limb and subtract
! 2: dnl the result from a second limb vector.
! 3:
! 4: dnl Copyright (C) 1992, 1993, 1994, 2000 Free Software Foundation, Inc.
! 5:
! 6: dnl This file is part of the GNU MP Library.
! 7:
! 8: dnl The GNU MP Library is free software; you can redistribute it and/or modify
! 9: dnl it under the terms of the GNU Lesser General Public License as published
! 10: dnl by the Free Software Foundation; either version 2.1 of the License, or (at
! 11: dnl your option) any later version.
! 12:
! 13: dnl The GNU MP Library is distributed in the hope that it will be useful, but
! 14: dnl WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
! 15: dnl or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
! 16: dnl License for more details.
! 17:
! 18: dnl You should have received a copy of the GNU Lesser General Public License
! 19: dnl along with the GNU MP Library; see the file COPYING.LIB. If not, write to
! 20: dnl the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
! 21: dnl MA 02111-1307, USA.
! 22:
! 23:
! 24: include(`../config.m4')
! 25:
! 26: C INPUT PARAMETERS
! 27: C res_ptr o0
! 28: C s1_ptr o1
! 29: C size o2
! 30: C s2_limb o3
! 31:
! 32: ASM_START()
! 33: PROLOGUE(mpn_submul_1)
! 34: C Make S1_PTR and RES_PTR point at the end of their blocks
! 35: C and put (- 4 x SIZE) in index/loop counter.
! 36: sll %o2,2,%o2
! 37: add %o0,%o2,%o4 C RES_PTR in o4 since o0 is retval
! 38: add %o1,%o2,%o1
! 39: sub %g0,%o2,%o2
! 40:
! 41: cmp %o3,0xfff
! 42: bgu L(large)
! 43: nop
! 44:
! 45: ld [%o1+%o2],%o5
! 46: mov 0,%o0
! 47: b L(0)
! 48: add %o4,-4,%o4
! 49: L(loop0):
! 50: subcc %o5,%g1,%g1
! 51: ld [%o1+%o2],%o5
! 52: addx %o0,%g0,%o0
! 53: st %g1,[%o4+%o2]
! 54: L(0): wr %g0,%o3,%y
! 55: sra %o5,31,%g2
! 56: and %o3,%g2,%g2
! 57: andcc %g1,0,%g1
! 58: mulscc %g1,%o5,%g1
! 59: mulscc %g1,%o5,%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 %g1,0,%g1
! 71: sra %g1,20,%g4
! 72: sll %g1,12,%g1
! 73: rd %y,%g3
! 74: srl %g3,20,%g3
! 75: or %g1,%g3,%g1
! 76:
! 77: addcc %g1,%o0,%g1
! 78: addx %g2,%g4,%o0 C add sign-compensation and cy to hi limb
! 79: addcc %o2,4,%o2 C loop counter
! 80: bne L(loop0)
! 81: ld [%o4+%o2],%o5
! 82:
! 83: subcc %o5,%g1,%g1
! 84: addx %o0,%g0,%o0
! 85: retl
! 86: st %g1,[%o4+%o2]
! 87:
! 88: L(large):
! 89: ld [%o1+%o2],%o5
! 90: mov 0,%o0
! 91: sra %o3,31,%g4 C g4 = mask of ones iff S2_LIMB < 0
! 92: b L(1)
! 93: add %o4,-4,%o4
! 94: L(loop):
! 95: subcc %o5,%g3,%g3
! 96: ld [%o1+%o2],%o5
! 97: addx %o0,%g0,%o0
! 98: st %g3,[%o4+%o2]
! 99: L(1): wr %g0,%o5,%y
! 100: and %o5,%g4,%g2
! 101: andcc %g0,%g0,%g1
! 102: mulscc %g1,%o3,%g1
! 103: mulscc %g1,%o3,%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,%g0,%g1
! 135: rd %y,%g3
! 136: addcc %g3,%o0,%g3
! 137: addx %g2,%g1,%o0
! 138: addcc %o2,4,%o2
! 139: bne L(loop)
! 140: ld [%o4+%o2],%o5
! 141:
! 142: subcc %o5,%g3,%g3
! 143: addx %o0,%g0,%o0
! 144: retl
! 145: st %g3,[%o4+%o2]
! 146: EPILOGUE(mpn_submul_1)
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