Annotation of OpenXM_contrib/gmp/mpn/x86/pentium/com_n.asm, Revision 1.1
1.1 ! ohara 1: dnl Intel Pentium mpn_com_n -- mpn ones complement.
! 2:
! 3: dnl Copyright 1996, 2001, 2002 Free Software Foundation, Inc.
! 4: dnl
! 5: dnl This file is part of the GNU MP Library.
! 6: dnl
! 7: dnl The GNU MP Library is free software; you can redistribute it and/or
! 8: dnl modify it under the terms of the GNU Lesser General Public License as
! 9: dnl published by the Free Software Foundation; either version 2.1 of the
! 10: dnl License, or (at your option) any later version.
! 11: dnl
! 12: dnl The GNU MP Library is distributed in the hope that it will be useful,
! 13: dnl but WITHOUT ANY WARRANTY; without even the implied warranty of
! 14: dnl MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
! 15: dnl Lesser General Public License for more details.
! 16: dnl
! 17: dnl You should have received a copy of the GNU Lesser General Public
! 18: dnl License along with the GNU MP Library; see the file COPYING.LIB. If
! 19: dnl not, write to the Free Software Foundation, Inc., 59 Temple Place -
! 20: dnl Suite 330, Boston, MA 02111-1307, USA.
! 21:
! 22: include(`../config.m4')
! 23:
! 24:
! 25: C P5: 1.75 cycles/limb
! 26:
! 27:
! 28: NAILS_SUPPORT(0-31)
! 29:
! 30:
! 31: C void mpn_com_n (mp_ptr dst, mp_srcptr src, mp_size_t size);
! 32: C
! 33: C This code is similar to mpn_copyi, basically there's just some "xorl
! 34: C $GMP_NUMB_MASK"s inserted.
! 35: C
! 36: C Alternatives:
! 37: C
! 38: C On P55 some MMX code could be 1.25 c/l (8 limb unrolled) if src and dst
! 39: C are the same alignment mod 8, but it doesn't seem worth the trouble for
! 40: C just that case (there'd need to be some plain integer available too for
! 41: C the unaligned case).
! 42:
! 43: defframe(PARAM_SIZE,12)
! 44: defframe(PARAM_SRC, 8)
! 45: defframe(PARAM_DST, 4)
! 46:
! 47: PROLOGUE(mpn_com_n)
! 48: deflit(`FRAME',0)
! 49:
! 50: movl PARAM_SRC, %eax
! 51: movl PARAM_SIZE, %ecx
! 52:
! 53: pushl %esi FRAME_pushl()
! 54: pushl %edi FRAME_pushl()
! 55:
! 56: leal (%eax,%ecx,4), %eax
! 57: xorl $-1, %ecx C -size-1
! 58:
! 59: movl PARAM_DST, %edx
! 60: addl $8, %ecx C -size+7
! 61:
! 62: jns L(end)
! 63:
! 64: movl (%edx), %esi C fetch destination cache line
! 65: nop
! 66:
! 67: L(top):
! 68: C eax &src[size]
! 69: C ebx
! 70: C ecx counter, limbs, negative
! 71: C edx dst, incrementing
! 72: C esi scratch
! 73: C edi scratch
! 74: C ebp
! 75:
! 76: movl 28(%edx), %esi C destination prefetch
! 77: addl $32, %edx
! 78:
! 79: movl -28(%eax,%ecx,4), %esi
! 80: movl -24(%eax,%ecx,4), %edi
! 81: xorl $GMP_NUMB_MASK, %esi
! 82: xorl $GMP_NUMB_MASK, %edi
! 83: movl %esi, -32(%edx)
! 84: movl %edi, -28(%edx)
! 85:
! 86: movl -20(%eax,%ecx,4), %esi
! 87: movl -16(%eax,%ecx,4), %edi
! 88: xorl $GMP_NUMB_MASK, %esi
! 89: xorl $GMP_NUMB_MASK, %edi
! 90: movl %esi, -24(%edx)
! 91: movl %edi, -20(%edx)
! 92:
! 93: movl -12(%eax,%ecx,4), %esi
! 94: movl -8(%eax,%ecx,4), %edi
! 95: xorl $GMP_NUMB_MASK, %esi
! 96: xorl $GMP_NUMB_MASK, %edi
! 97: movl %esi, -16(%edx)
! 98: movl %edi, -12(%edx)
! 99:
! 100: movl -4(%eax,%ecx,4), %esi
! 101: movl (%eax,%ecx,4), %edi
! 102: xorl $GMP_NUMB_MASK, %esi
! 103: xorl $GMP_NUMB_MASK, %edi
! 104: movl %esi, -8(%edx)
! 105: movl %edi, -4(%edx)
! 106:
! 107: addl $8, %ecx
! 108: js L(top)
! 109:
! 110:
! 111: L(end):
! 112: C eax &src[size]
! 113: C ecx 0 to 7, representing respectively 7 to 0 limbs remaining
! 114: C edx dst, next location to store
! 115:
! 116: subl $4, %ecx
! 117: nop
! 118:
! 119: jns L(no4)
! 120:
! 121: movl -12(%eax,%ecx,4), %esi
! 122: movl -8(%eax,%ecx,4), %edi
! 123: xorl $GMP_NUMB_MASK, %esi
! 124: xorl $GMP_NUMB_MASK, %edi
! 125: movl %esi, (%edx)
! 126: movl %edi, 4(%edx)
! 127:
! 128: movl -4(%eax,%ecx,4), %esi
! 129: movl (%eax,%ecx,4), %edi
! 130: xorl $GMP_NUMB_MASK, %esi
! 131: xorl $GMP_NUMB_MASK, %edi
! 132: movl %esi, 8(%edx)
! 133: movl %edi, 12(%edx)
! 134:
! 135: addl $16, %edx
! 136: addl $4, %ecx
! 137: L(no4):
! 138:
! 139: subl $2, %ecx
! 140: nop
! 141:
! 142: jns L(no2)
! 143:
! 144: movl -4(%eax,%ecx,4), %esi
! 145: movl (%eax,%ecx,4), %edi
! 146: xorl $GMP_NUMB_MASK, %esi
! 147: xorl $GMP_NUMB_MASK, %edi
! 148: movl %esi, (%edx)
! 149: movl %edi, 4(%edx)
! 150:
! 151: addl $8, %edx
! 152: addl $2, %ecx
! 153: L(no2):
! 154:
! 155: popl %edi
! 156: jnz L(done)
! 157:
! 158: movl -4(%eax), %ecx
! 159:
! 160: xorl $GMP_NUMB_MASK, %ecx
! 161: popl %esi
! 162:
! 163: movl %ecx, (%edx)
! 164: ret
! 165:
! 166: L(done):
! 167: popl %esi
! 168: ret
! 169:
! 170: EPILOGUE()
FreeBSD-CVSweb <freebsd-cvsweb@FreeBSD.org>
![[BACK]](/icons/cvsweb/back.gif){kind=icon}
Return to com_n.asm CVS log ![[TXT]](/icons/cvsweb/text.gif){kind=icon}
![[DIR]](/icons/cvsweb/dir.gif){kind=icon}
Up to [local] / OpenXM_contrib / gmp / mpn / x86 / pentium