Annotation of OpenXM_contrib/gmp/mpn/x86/pentium4/sse2/mul_1.asm, Revision 1.1
1.1 ! ohara 1: dnl Intel Pentium-4 mpn_mul_1 -- Multiply a limb vector with a limb and store
! 2: dnl the result in a second limb vector.
! 3:
! 4: dnl Copyright 2001, 2002 Free Software Foundation, Inc.
! 5: dnl
! 6: dnl This file is part of the GNU MP Library.
! 7: dnl
! 8: dnl The GNU MP Library is free software; you can redistribute it and/or
! 9: dnl modify it under the terms of the GNU Lesser General Public License as
! 10: dnl published by the Free Software Foundation; either version 2.1 of the
! 11: dnl License, or (at your option) any later version.
! 12: dnl
! 13: dnl The GNU MP Library is distributed in the hope that it will be useful,
! 14: dnl but WITHOUT ANY WARRANTY; without even the implied warranty of
! 15: dnl MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
! 16: dnl Lesser General Public License for more details.
! 17: dnl
! 18: dnl You should have received a copy of the GNU Lesser General Public
! 19: dnl License along with the GNU MP Library; see the file COPYING.LIB. If
! 20: dnl not, write to the Free Software Foundation, Inc., 59 Temple Place -
! 21: dnl Suite 330, Boston, MA 02111-1307, USA.
! 22:
! 23: include(`../config.m4')
! 24:
! 25:
! 26: C P4: 4 cycles/limb
! 27:
! 28:
! 29: C mp_limb_t mpn_mul_1 (mp_ptr dst, mp_srcptr src, mp_size_t size,
! 30: C mp_limb_t multiplier);
! 31: C mp_limb_t mpn_mul_1c (mp_ptr dst, mp_srcptr src, mp_size_t size,
! 32: C mp_limb_t multiplier, mp_limb_t carry);
! 33: C
! 34: C Only the carry limb propagation is on the dependent chain, hence 4 c/l.
! 35:
! 36: defframe(PARAM_CARRY, 20)
! 37: defframe(PARAM_MULTIPLIER,16)
! 38: defframe(PARAM_SIZE, 12)
! 39: defframe(PARAM_SRC, 8)
! 40: defframe(PARAM_DST, 4)
! 41:
! 42: TEXT
! 43: ALIGN(16)
! 44: PROLOGUE(mpn_mul_1c)
! 45: deflit(`FRAME',0)
! 46: movd PARAM_CARRY, %mm0
! 47: jmp L(start_1c)
! 48: EPILOGUE()
! 49:
! 50: PROLOGUE(mpn_mul_1)
! 51: deflit(`FRAME',0)
! 52: pxor %mm0, %mm0
! 53: L(start_1c):
! 54: movl PARAM_SRC, %eax
! 55: movd PARAM_MULTIPLIER, %mm7
! 56: movl PARAM_DST, %edx
! 57: movl PARAM_SIZE, %ecx
! 58:
! 59: L(top):
! 60: C eax src, incrementing
! 61: C ebx
! 62: C ecx counter, size iterations
! 63: C edx dst, incrementing
! 64: C
! 65: C mm0 carry limb
! 66: C mm7 multiplier
! 67:
! 68: movd (%eax), %mm1
! 69: addl $4, %eax
! 70: pmuludq %mm7, %mm1
! 71:
! 72: paddq %mm1, %mm0
! 73: movd %mm0, (%edx)
! 74: addl $4, %edx
! 75:
! 76: psrlq $32, %mm0
! 77:
! 78: subl $1, %ecx
! 79: jnz L(top)
! 80:
! 81:
! 82: movd %mm0, %eax
! 83: emms
! 84: ret
! 85:
! 86: EPILOGUE()
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