diff options
Diffstat (limited to 'libotr/libgcrypt-1.8.7/mpi/pentium4/sse2/mpih-mul1.S')
| -rw-r--r-- | libotr/libgcrypt-1.8.7/mpi/pentium4/sse2/mpih-mul1.S | 96 |
1 files changed, 96 insertions, 0 deletions
diff --git a/libotr/libgcrypt-1.8.7/mpi/pentium4/sse2/mpih-mul1.S b/libotr/libgcrypt-1.8.7/mpi/pentium4/sse2/mpih-mul1.S new file mode 100644 index 0000000..a0c98fb --- /dev/null +++ b/libotr/libgcrypt-1.8.7/mpi/pentium4/sse2/mpih-mul1.S @@ -0,0 +1,96 @@ +/* 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 + |