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-/* Intel Pentium-4 mpn_mul_1 -- Multiply a limb vector with a limb and store
- * the result in a second limb vector.
- *
- * Copyright 2001, 2002, 2003, 2005 Free Software Foundation, Inc.
- *
- * This file is part of Libgcrypt.
- *
- * Libgcrypt is free software; you can redistribute it and/or modify
- * it under the terms of the GNU Lesser General Public License as
- * published by the Free Software Foundation; either version 2.1 of
- * the License, or (at your option) any later version.
- *
- * Libgcrypt is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
- *
- * Note: This code is heavily based on the GNU MP Library.
- * Actually it's the same code with only minor changes in the
- * way the data is stored; this is to support the abstraction
- * of an optional secure memory allocation which may be used
- * to avoid revealing of sensitive data due to paging etc.
- */
-
-
-#include "sysdep.h"
-#include "asm-syntax.h"
-
-
-/*******************
- * mpi_limb_t
- * _gcry_mpih_mul_1( mpi_ptr_t res_ptr, (sp + 4)
- * mpi_ptr_t s1_ptr, (sp + 8)
- * mpi_size_t s1_size, (sp + 12)
- * mpi_limb_t s2_limb) (sp + 16)
- *
- * src != dst src == dst
- * P6 model 9 (Banias) ?.?
- * P6 model 13 (Dothan) 4.75 4.75
- * P4 model 0 (Willamette) 4.0 6.0
- * P4 model 1 (?) 4.0 6.0
- * P4 model 2 (Northwood) 4.0 6.0
- * P4 model 3 (Prescott) ?.? ?.?
- * P4 model 4 (Nocona) ?.? ?.?
- * Unfortunately when src==dst the write-combining described in
- * pentium4/README takes us up to 6 c/l.
- *
- */
-
- TEXT
- ALIGN (3)
- GLOBL C_SYMBOL_NAME(_gcry_mpih_mul_1)
-C_SYMBOL_NAME(_gcry_mpih_mul_1:);
-
- pxor %mm0, %mm0
-
-.Lstart_1c:
- movl 8(%esp), %eax
- movd 16(%esp), %mm7
- movl 4(%esp), %edx
- movl 12(%esp), %ecx
-
-.Ltop:
-
-/*
- C eax src, incrementing
- C ebx
- C ecx counter, size iterations
- C edx dst, incrementing
- C
- C mm0 carry limb
- C mm7 multiplier
-*/
-
- movd (%eax), %mm1
- addl $4, %eax
- pmuludq %mm7, %mm1
-
- paddq %mm1, %mm0
- movd %mm0, (%edx)
- addl $4, %edx
-
- psrlq $32, %mm0
-
- subl $1, %ecx
- jnz .Ltop
-
-
- movd %mm0, %eax
- emms
- ret
-