Annotation of OpenXM_contrib/gmp/mpn/x86/k6/mmx/com_n.asm, Revision 1.1
1.1 ! maekawa 1: dnl AMD K6-2 mpn_com_n -- mpn bitwise one's complement.
! 2: dnl
! 3: dnl alignment dst/src, A=0mod8 N=4mod8
! 4: dnl A/A A/N N/A N/N
! 5: dnl K6-2 1.0 1.18 1.18 1.18 cycles/limb
! 6: dnl K6 1.5 1.85 1.75 1.85
! 7:
! 8:
! 9: dnl Copyright (C) 1999, 2000 Free Software Foundation, Inc.
! 10: dnl
! 11: dnl This file is part of the GNU MP Library.
! 12: dnl
! 13: dnl The GNU MP Library is free software; you can redistribute it and/or
! 14: dnl modify it under the terms of the GNU Lesser General Public License as
! 15: dnl published by the Free Software Foundation; either version 2.1 of the
! 16: dnl License, or (at your option) any later version.
! 17: dnl
! 18: dnl The GNU MP Library is distributed in the hope that it will be useful,
! 19: dnl but WITHOUT ANY WARRANTY; without even the implied warranty of
! 20: dnl MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
! 21: dnl Lesser General Public License for more details.
! 22: dnl
! 23: dnl You should have received a copy of the GNU Lesser General Public
! 24: dnl License along with the GNU MP Library; see the file COPYING.LIB. If
! 25: dnl not, write to the Free Software Foundation, Inc., 59 Temple Place -
! 26: dnl Suite 330, Boston, MA 02111-1307, USA.
! 27:
! 28:
! 29: include(`../config.m4')
! 30:
! 31:
! 32: C void mpn_com_n (mp_ptr dst, mp_srcptr src, mp_size_t size);
! 33: C
! 34: C Take the bitwise ones-complement of src,size and write it to dst,size.
! 35:
! 36: defframe(PARAM_SIZE,12)
! 37: defframe(PARAM_SRC, 8)
! 38: defframe(PARAM_DST, 4)
! 39:
! 40: .text
! 41: ALIGN(32)
! 42: PROLOGUE(mpn_com_n)
! 43: deflit(`FRAME',0)
! 44:
! 45: movl PARAM_SIZE, %ecx
! 46: movl PARAM_SRC, %eax
! 47: movl PARAM_DST, %edx
! 48: shrl %ecx
! 49: jnz L(two_or_more)
! 50:
! 51: movl (%eax), %eax
! 52: notl %eax
! 53: movl %eax, (%edx)
! 54: ret
! 55:
! 56:
! 57: L(two_or_more):
! 58: pushl %ebx
! 59: FRAME_pushl()
! 60: movl %ecx, %ebx
! 61:
! 62: pcmpeqd %mm7, %mm7 C all ones
! 63:
! 64:
! 65: ALIGN(16)
! 66: L(top):
! 67: C eax src
! 68: C ebx floor(size/2)
! 69: C ecx counter
! 70: C edx dst
! 71: C esi
! 72: C edi
! 73: C ebp
! 74:
! 75: movq -8(%eax,%ecx,8), %mm0
! 76: pxor %mm7, %mm0
! 77: movq %mm0, -8(%edx,%ecx,8)
! 78: loop L(top)
! 79:
! 80:
! 81: jnc L(no_extra)
! 82: movl (%eax,%ebx,8), %eax
! 83: notl %eax
! 84: movl %eax, (%edx,%ebx,8)
! 85: L(no_extra):
! 86:
! 87: popl %ebx
! 88: emms_or_femms
! 89: ret
! 90:
! 91: EPILOGUE()
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